Difference between revisions of "Amynthas phatubensis"

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{{Publication to wiki notice
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| author = Bantaowong, Ueangfa AND Chanabun, Ratmanee AND Tongkerd, Piyoros AND Sutcharit, Chirasak AND James, Samuel W. AND Panha, Somsak
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| author_abbreviated = Bantaowong U AND Chanabun R AND Tongkerd P AND Sutcharit C AND James S AND Panha S
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| year = 2011
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| title = New earthworm species of the genus ''Amynthas'' Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae)
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| journal = ZooKeys
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| volume = 90
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| pages = 35--62
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| doi = 10.3897/zookeys.90.1121
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| citationurl = http://www.pensoft.net/journals/zookeys/article/1121/citation/
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| url = http://www.pensoft.net/journals/zookeys/article/1121/abstract
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| publisher = Pensoft Publishers
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| publisherurl = http://www.pensoft.net/
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}}
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{{Treatment start
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| Ordo = Haplotaxida
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| Familia = Megascolecidae
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| Genus = Amynthas
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| Specific name = phatubensis
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| Infraspecific name =
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| Taxon rank =
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| Taxon authority = Panha & Bantaowong
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| Taxon status = sp. n.
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| Wikispecies page name = Amynthas_phatubensis
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| ZooBank ID = urn:lsid:zoobank.org:act:299379EB-C7CE-4B89-8A40-40E3122DCAB9
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| Pensoft Profile = Amynthas_phatubensis
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}}
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 +
==Description of holotype:==
 +
Dimensions; 110 mm by 4.3 mm at segment X, 4.3 at segment XX, 4.0 mm at clitellum; body cylindrical with 108 segments. Setae regularly distributed around segmental equators, numbering 51 at VII, 60 at XX, 15 between mp, setae formula AA:AB:ZZ:ZY<nowiki>=</nowiki> 1:1:1:1 at XIII with no ventral gaps. Single fp at XIV. Prostomium epilobic with tongue open. First dorsal pore at 5/6. Clitellum annular XIV–XVI with no setae.<br />
 +
A pair of mp is located ventro-laterally in XVIII, or at 9th seta line, 0.33 circumference apart ventrally, convex structure; distance between mp 4.2 mm. Porophores (protuberances bearing male aperture), papilla-like structures. Each mp surrounded by six flat, circular genital markings almost the same diameter as mp, also one pair is equatorial in XVII in line with the male pores. One pair of sp in intersegmental furrow 7/8, distance between pores 0.32 circumference ventrally apart; distance between sp 3.5 mm. Genital markings, rounded, flat, located close to sp, postsetal paired on VII very near 7/8, presetal paired on VIII.<br />
 +
Septa 5/6 and 6/7 thick, 7/8 thin, 8/9 and 9/10 absent, 10/11–13/14 thin. Gizzard large within VIII–X, intestinal origin in XV, no lymph glands observed. Typhlosole small from XXVII. Intestinal caeca originate from XXVII extending forward to XXIII, simple, long finger-shape. Hearts esophageal in X–XIII. Holandric; testes and funnels in ventrally joined sacs in X–XI. Seminal vesicles paired in XI–XII. Prostates in XVII–XX; prostatic ducts U-shape. Genital marking glands absent.<br />
 +
Ovaries in XIII. Sc one pair in VIII; ampulla large ovate sac, duct stout, short; long stalked diverticulum, convoluted kinks enclosed within membrane, spherical knob terminal. No nephridia on spermathecal ducts. A large sessile genital marking gland corresponding to each external genital marking in VII–VIII.<br />
 +
All the key morphological characters of the holotype and paratype specimens are given in Table 2.
 +
{| class="wikitable" ; style="width: 100%"
 +
|+ '''Table 2.''' Holotype and Paratype dimension and other morphological characteristics of ''{{Taxon name|Amynthas phatubensis}}'' Panha & Bantaowong, sp. n.
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|-
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| rowspan="2" | '''Characters / Types'''
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| rowspan="2" | '''Body length (mm)'''
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| rowspan="2" | '''Number of segments'''
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| colspan="2" style="text-align: center;" | '''Location of genital markings'''
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| rowspan="2" | '''First dorsal pore'''
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| colspan="3" style="text-align: center;" | '''Number of setae'''
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| rowspan="2" | '''Prostate glands'''
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| rowspan="2" | '''Intestinal caeca'''
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|-
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| Preclitellum || Postclitellum || VII || XX || Between male pore
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|-
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| Holotype CUMZ 3204 || 110 || 108 || VII, VIII || XVII, XVIII || 5/6 || 51 || 60 || 15 || XVII–XX || XXVII–XXIII
 +
|-
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| Paratype CUMZ 3205 ||
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|-
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| 1 || 90 || 96 || VII, VIII || XVIII || 5/6 || 60 || 58 || 15 || XVII–XXI || XXVII–XXIV
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|-
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| 2 || 105 || 107 || VII, VIII, IX || XVII, XVIII, XIX || 5/6 || 52 || 58 || 12 || XVII–XX || XXVII–XXIV
 +
|-
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| 3 || 100 || 105 || VII, VIII, IX || XVIII || 5/6 || 53 || 60 || 9 || XVII–XX || XXVII–XXIV
 +
|-
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| 4 || 80 || 86 || VII, VIII || XVII, XVIII, XIX || 5/6 || 53 || 65 || 13 || XVII–XX || XXVII–XXIV
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|-
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| 5 || 120 || 96 || VII, VIII || XVIII || 5/6 || 58 || 68 || 11 || XVII–XX || XXVII–XXIV
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|-
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| 6 || 101 || 85 || VII, VIII || XVIII || 5/6 || 51 || 59 || 9 || XVII–XX || XXVII–XXIV
 +
|-
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| 7 || 131 || 86 || VII, VIII || XVII, XVIII || 5/6 || 64 || 67 || 15 || XVII–XXI || XXVII–XXII
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|-
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| 8 || 108 || 98 || VII, VIII || XVII, XVIII || 5/6 || 58 || 62 || 15 || XVII–XXI || XXVII–XXII
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|-
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| 9 || 116 || 99 || VII, VIII || XVII, XVIII || 5/6 || 53 || 64 || 11 || XVII–XXI || XXVII–XXIII
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|-
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| 10 || 89 || 92 || VII, VIII || XVII, XVIII || 5/6 || 64 || 58 || 12 || XVII–XX || XXVII–XXIV
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|-
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| 11 || 99 || 106 || VII, VIII, IX || XVII, XVIII || 5/6 || 60 || 63 || 13 || XVII–XXI || XXVII–XXIV
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|-
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| 12 || 112 || 112 || VII, VIII || XVII, XVIII || 5/6 || 52 || 58 || 11 || XVII–XX || XXVII–XXIII
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|-
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| 13 || 142 || 110 || VII, VIII || XVII, XVIII || 5/6 || 49 || 58 || 7 || XVII–XX || XXVII–XXIV
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|-
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| 14 || 137 || 108 || VII, VIII, IX || XVII, XVIII || 5/6 || 62 || 65 || 11 || XVII–XX || XXVII–XXIII
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|-
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| 15 || 80 || 85 || VII, VIII, IX || XVII, XVIII || 5/6 || 54 || 60 || 13 || XVII–XX || XXVII–XXIV
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|-
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| 16 || 89 || 111 || VII, VIII, IX || XVII, XVIII || 5/6 || 57 || 59 || 14 || XVII–XXI || XXVII–XXIII
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|-
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| 17 || 84 || 105 || VII, VIII || XVII, XVIII || 5/6 || 52 || 59 || 11 || XVII–XX || XXVII–XXIV
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|-
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| 18 || 148 || 112 || VII, VIII || XVII, XVIII || 5/6 || 51 || 58 || 12 || XVII–XX || XXVII–XXII
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|-
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| 19 || 109 || 114 || VII, VIII || XVII, XVIII || 5/6 || 64 || 59 || 12 || XVII–XX || XXVII–XXII
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|-
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| 20 || 144 || 107 || VII, VIII || XVII, XVIII || 5/6 || 53 || 60 || 11 || XVII–XXI || XXVII–XXIV
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|-
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| 21 || 84 || 108 || VII, VIII || XVII, XVIII || 5/6 || 64 || 61 || 15 || XVII–XX || XXVII–XXII
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|}
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==Variation:==
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The holotype measures 110 mm body length with 108 segments; the twenty one paratypes range in size from 80–148 mm (108±21.93 mm) body length with 85–114 segments (Table 2).
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==Type locality:==
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Tham Pha Tub Arboretum, Nan province, Thailand, [http://ptp.pensoft.eu/redirect_to_googlemap.php?labels%5B0%5D=18%C2%B051%2716.4%22N%2C+100%C2%B044%2710.1%22E&coordinates%5B0%5D=18%C2%B051%2716.4%22N%2C+100%C2%B044%2710.1%22E 18°51'16.4"N, 100°44'10.1"E], 265 meters elevation (11th October 2009). We also collected another lot of further specimens from Tontong Waterfall, Nan province (location 3 in Figure 1), which is located about a hundred kilometers north of the type locality.
 +
 
 +
==Etymology:==
 +
This species was named after the type locality, Tham Pha Tub Arboretum.
 +
 
 +
==Type material:==
 +
The holotype (CUMZ 3204) and 15 paratypes (CUMZ 3205) and 10 paratypes (CUMZ 3212) are deposited in Chulalongkorn University, Museum of Zoology. Another four paratypes will be deposited in the Biozentrum Grindel und Zoologisches Museum, Hamburg, Germany (UHH), and three paratypes in the Natural History Museum, London (NHM).
 +
 
 +
==Habitat:==
 +
Found in the top soil at about 10 cm depth, the soil surface was covered with leaf litter in a deciduous limestone forest at Tham Pha Tub Arboretum. The soil was carefully dug close to the casts. Many ariophantid snails, ''{{Taxon name|Cryptozona siamensis}}'' Pfeiffer, 1856 were on the ground or under leaf litter.
 +
 
 +
==Diagnosis:==
 +
''{{Taxon name|Amynthas phatubensis}}'' sp. n. is a medium to large sized terrestrial earthworm with a pair of mp surrounded by six genital papillae on segment XVIII. Within the ''zebrus''-group, this species is diagnosed by the unique combination of dorsal pores in 5/6, simple digitate caeca, ventrally joined testis sacs, genital marking glands in the spermathecal segments, and the spermathecal characters of the large ovate ampulla, stalked diverticulum whose folds are membrane-bound, and spherical knob terminal diverticulum sac.
 +
 
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==Remarks:==
 +
''{{Taxon name|Amynthas phatubensis}}'' sp. n. has very simple characteristics of the genus, but among these, only the superficial male pores are external. In most newly collected specimens it was difficult to observe the pores or marks on the bodies. However, after preservation they can be seen more clearly. The internal organs are much more easily discerned. This new species is quite distinct when compared to the two closely related species from Laos, ''{{Taxon name|Amynthas chandyi}}'' Hong, 2008 and ''{{Taxon name|Amynthas namphouinensis}}'' Hong, 2008, which belong in the same ''zebrus''-group. The two Laos species are a little bit smaller than ''{{Taxon name|Amynthas phatubensis}}'' sp. n., especially ''{{Taxon name|Amynthas chandyi}}''. Even though ''{{Taxon name|Amynthas namphouinensis}}'' is much closer in appearance to ''{{Taxon name|Amynthas phatubensis}}'' sp. n., there are distinct differences between the type specimens (Figs 6 and 7). For example, the distance between the mp of ''{{Taxon name|Amynthas phatubensis}}'' sp. n. is 4.2 mm for the holotype and range from 3.0–4.5 mm (4.27±0.57mm), while for ''{{Taxon name|Amynthas namphouinensis}}'' this was significantly smaller, ranging from 1.4–1.5 mm. The distance between a pair of sp is also different, being 3.5–4.5 mm (4.12±0.4 mm) for ''{{Taxon name|Amynthas phatubensis}}'' sp. n. and 1.4–2.0 mm in ''{{Taxon name|Amynthas namphouinensis}}''. The distance between the male pores as a fraction of the estimated circumference of the 18th segment is 0.30–0.33 in ''{{Taxon name|Amynthas phatubensis}}'' sp. n., but 0.10–0.14 circumference apart in ''{{Taxon name|Amynthas namphouinensis}}''. Moreover, ''{{Taxon name|Amynthas phatubensis}}'' sp. n. has no genital marking glands on segments XVII–XIX, where ''{{Taxon name|Amynthas namphouinensis}}'' has sessile genital marking glands, but contains two distinct genital marking glands located close to sc that are absent in ''{{Taxon name|Amynthas namphouinensis}}''.<br />
 +
Two populations of ''{{Taxon name|Amynthas phatubensis}}'' sp. n. were sampled, one from the type locality and one from Tontong waterfall. Distinct DNA barcode clusters corresponding to these populations had intra-cluster Kimura 2 parameter distances of 0.023 (N<nowiki>=</nowiki>9) and 0.016 (N<nowiki>=</nowiki>5) respectively. The inter-cluster divergence between the two populations is 0.084. Based on the morphological unity and the fact that the divergence is less than that usually seen between congeneric species pairs of earthworms (Chang et al. 2007<ref name="B10">{{aut|Chang C}}, {{aut|Lin Y}}, {{aut|Chen I}}, {{aut|Chuang S}}, {{aut|Chen J}} (2007) Taxonomic re-evaluation of the Taiwanese montane earthworm ''Amynthas wulinensis'' Tsai, Shen & Tsai, 2001 (Oligochaeta: Megascolecidae): polytypic species or species complex?. Organism Diversity & Evolution 7:231-240.</ref >; Pérez-Losada et al. 2005<ref name="B27">{{aut|Pérez-Losada M}}, {{aut|Eiroa J}}, {{aut|Mato S}}, {{aut|Domínguez J}} (2005) Phylogenetic species delimitation of the earthworm ''Eisenia fetida'' (Savigny, 1826) and ''Eisenia andrei'' (Bouché, 1972) (Oligochaeta, Lumbricidae) based on mitochondrial and nuclear DNA genes, Pedobiologia 49: 317–324.</ref >, James et al. 2010<ref name="B24">{{aut|James S}}, {{aut|Porco D}}, {{aut|Decaëns T}}, {{aut|Richard B}}, {{aut|Rougerie R}}, {{aut|et a}} (2010) DNA Barcoding Reveals Cryptic Diversity in ''Lumbricus terrestris'' L., 1758 (Clitellata): Resurrection of ''L. herculeus'' (Savigny, 1826). PLoS ONE 5(12): e15629. [http://dx.doi.org/10.1371/journal.pone.0015629 doi:10.1371/journal.pone.0015629]</ref >), we choose to maintain the two populations as representing one species. By contrast, the inter-cluster divergence between these populations and three other morpho-species with the same spermathecal battery, from the same two sites is in the range of 0.269-0.294. A consensus sequence from the type locality specimens is in Appendix 1. Another use of COI barcode sequence from type material is in Blakemore et al. (2010)<ref name="B8">{{aut|Blakemore R}}, {{aut|Kupriyanova E}}, {{aut|Grygier M}} (2010) Neotypification of ''Drawida hattamimizu'' Hatai, 1930 (Annelida, Oligochaeta, Megadrili, Moniligastridae) as a model linking mtDNA (COI) sequences to an earthworm type, with a response to the ‘Can of Worms’ theory of cryptic species. Zookeys 41:1-29.</ref >.
 +
 
 +
==Original Description==
 +
*{{aut|Bantaowong, U}}; {{aut|Chanabun, R}}; {{aut|Tongkerd, P}}; {{aut|Sutcharit, C}}; {{aut|James, S}}; {{aut|Panha, S}}; 2011: New earthworm species of the genus ''Amynthas'' Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae) [http://www.pensoft.net/journals/zookeys/ ''ZooKeys'',] '''90''': 35-62. {{doi|10.3897/zookeys.90.1121}}
 +
 
 +
==Other References==
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 +
<references />
 +
 
 +
==Images==
 +
{{Gallery | lines=5 | width=250
 +
|1= File:ZooKeys-090-035-g001.jpg|2= '''Figure 1.''' Map of type locality of '''1''' ''{{Taxon name|Amynthas srinan}}'' sp. n. from Srinan National Park, Nan province, '''2''' ''{{Taxon name|Amynthas phatubensis}}'' sp. n. from Tham Pha Tub Arboretum, Nan province, '''3''' ''{{Taxon name|Amynthas tontong}}'' sp. n. from Tontong Waterfall, Pua district, Nan province and '''4''' ''{{Taxon name|Amynthas borealis}}'' sp. n. from a small hill near Chaloemprakiat district, Nan province.
 +
|3= File:ZooKeys-090-035-g002.jpg|4= '''Figure 2.''' External and internal morphology of holotype (CUMZ 3204) of ''{{Taxon name|Amynthas phatubensis}}'' sp. n. '''A''' External ventral view, '''B''' internal dorsal view and '''C''' spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore.
 +
|5= File:ZooKeys-090-035-g006.jpg|6= '''Figure 6.''' External and internal morphology of holotype (BDNUL 0001) of ''{{Taxon name|Amynthas namphouinensis}}'' Hong, 2008 '''A''' External ventral view, '''B''' internal dorsal view and '''C''' spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore.
 +
|7= File:ZooKeys-090-035-g007.jpg|8= '''Figure 7.''' External and internal morphology of holotype (BDNUL 0002) of ''{{Taxon name|Amynthas chandyi}}'' Hong, 2008 '''A''' External ventral view, '''B''' internal dorsal view and '''C''' spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore.
 +
}}

Revision as of 17:52, 14 April 2011

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This page should be cited as follows (rationale):
Bantaowong U, Chanabun R, Tongkerd P, Sutcharit C, James S, Panha S (2011) New earthworm species of the genus Amynthas Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae). ZooKeys 90 : 35–62, doi. Versioned wiki page: 2011-04-14, version 4550, https://species-id.net/w/index.php?title=Amynthas_phatubensis&oldid=4550 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Bantaowong2011ZooKeys90,
author = {Bantaowong, Ueangfa AND Chanabun, Ratmanee AND Tongkerd, Piyoros AND Sutcharit, Chirasak AND James, Samuel W. AND Panha, Somsak},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {New earthworm species of the genus Amynthas Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae)},
year = {2011},
volume = {90},
issue = {},
pages = {35--62},
doi = {10.3897/zookeys.90.1121},
url = {http://www.pensoft.net/journals/zookeys/article/1121/abstract},
note = {Versioned wiki page: 2011-04-14, version 4550, https://species-id.net/w/index.php?title=Amynthas_phatubensis&oldid=4550 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - New earthworm species of the genus Amynthas Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae)
A1 - Bantaowong U
A1 - Chanabun R
A1 - Tongkerd P
A1 - Sutcharit C
A1 - James S
A1 - Panha S
Y1 - 2011
JF - ZooKeys
JA -
VL - 90
IS -
UR - http://dx.doi.org/10.3897/zookeys.90.1121
SP - 35
EP - 62
PB - Pensoft Publishers
M1 - Versioned wiki page: 2011-04-14, version 4550, https://species-id.net/w/index.php?title=Amynthas_phatubensis&oldid=4550 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.90.1121

Wikipedia/ Citizendium:

<ref name="Bantaowong2011ZooKeys90">{{Citation
| author = Bantaowong U, Chanabun R, Tongkerd P, Sutcharit C, James S, Panha S
| title = New earthworm species of the genus Amynthas Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae)
| journal = ZooKeys
| year = 2011
| volume = 90
| issue =
| pages = 35--62
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.90.1121
| url = http://www.pensoft.net/journals/zookeys/article/1121/abstract
| pmc =
| accessdate = 2025-04-04

}} Versioned wiki page: 2011-04-14, version 4550, https://species-id.net/w/index.php?title=Amynthas_phatubensis&oldid=4550 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Haplotaxida
Familia: Megascolecidae
Genus: Amynthas

Name

Amynthas phatubensis Panha & Bantaowong sp. n. – Wikispecies link – ZooBank link – Pensoft Profile

Description of holotype:

Dimensions; 110 mm by 4.3 mm at segment X, 4.3 at segment XX, 4.0 mm at clitellum; body cylindrical with 108 segments. Setae regularly distributed around segmental equators, numbering 51 at VII, 60 at XX, 15 between mp, setae formula AA:AB:ZZ:ZY= 1:1:1:1 at XIII with no ventral gaps. Single fp at XIV. Prostomium epilobic with tongue open. First dorsal pore at 5/6. Clitellum annular XIV–XVI with no setae.
A pair of mp is located ventro-laterally in XVIII, or at 9th seta line, 0.33 circumference apart ventrally, convex structure; distance between mp 4.2 mm. Porophores (protuberances bearing male aperture), papilla-like structures. Each mp surrounded by six flat, circular genital markings almost the same diameter as mp, also one pair is equatorial in XVII in line with the male pores. One pair of sp in intersegmental furrow 7/8, distance between pores 0.32 circumference ventrally apart; distance between sp 3.5 mm. Genital markings, rounded, flat, located close to sp, postsetal paired on VII very near 7/8, presetal paired on VIII.
Septa 5/6 and 6/7 thick, 7/8 thin, 8/9 and 9/10 absent, 10/11–13/14 thin. Gizzard large within VIII–X, intestinal origin in XV, no lymph glands observed. Typhlosole small from XXVII. Intestinal caeca originate from XXVII extending forward to XXIII, simple, long finger-shape. Hearts esophageal in X–XIII. Holandric; testes and funnels in ventrally joined sacs in X–XI. Seminal vesicles paired in XI–XII. Prostates in XVII–XX; prostatic ducts U-shape. Genital marking glands absent.
Ovaries in XIII. Sc one pair in VIII; ampulla large ovate sac, duct stout, short; long stalked diverticulum, convoluted kinks enclosed within membrane, spherical knob terminal. No nephridia on spermathecal ducts. A large sessile genital marking gland corresponding to each external genital marking in VII–VIII.
All the key morphological characters of the holotype and paratype specimens are given in Table 2.

Table 2. Holotype and Paratype dimension and other morphological characteristics of Amynthas phatubensis Panha & Bantaowong, sp. n.
Characters / Types Body length (mm) Number of segments Location of genital markings First dorsal pore Number of setae Prostate glands Intestinal caeca
Preclitellum Postclitellum VII XX Between male pore
Holotype CUMZ 3204 110 108 VII, VIII XVII, XVIII 5/6 51 60 15 XVII–XX XXVII–XXIII
Paratype CUMZ 3205
1 90 96 VII, VIII XVIII 5/6 60 58 15 XVII–XXI XXVII–XXIV
2 105 107 VII, VIII, IX XVII, XVIII, XIX 5/6 52 58 12 XVII–XX XXVII–XXIV
3 100 105 VII, VIII, IX XVIII 5/6 53 60 9 XVII–XX XXVII–XXIV
4 80 86 VII, VIII XVII, XVIII, XIX 5/6 53 65 13 XVII–XX XXVII–XXIV
5 120 96 VII, VIII XVIII 5/6 58 68 11 XVII–XX XXVII–XXIV
6 101 85 VII, VIII XVIII 5/6 51 59 9 XVII–XX XXVII–XXIV
7 131 86 VII, VIII XVII, XVIII 5/6 64 67 15 XVII–XXI XXVII–XXII
8 108 98 VII, VIII XVII, XVIII 5/6 58 62 15 XVII–XXI XXVII–XXII
9 116 99 VII, VIII XVII, XVIII 5/6 53 64 11 XVII–XXI XXVII–XXIII
10 89 92 VII, VIII XVII, XVIII 5/6 64 58 12 XVII–XX XXVII–XXIV
11 99 106 VII, VIII, IX XVII, XVIII 5/6 60 63 13 XVII–XXI XXVII–XXIV
12 112 112 VII, VIII XVII, XVIII 5/6 52 58 11 XVII–XX XXVII–XXIII
13 142 110 VII, VIII XVII, XVIII 5/6 49 58 7 XVII–XX XXVII–XXIV
14 137 108 VII, VIII, IX XVII, XVIII 5/6 62 65 11 XVII–XX XXVII–XXIII
15 80 85 VII, VIII, IX XVII, XVIII 5/6 54 60 13 XVII–XX XXVII–XXIV
16 89 111 VII, VIII, IX XVII, XVIII 5/6 57 59 14 XVII–XXI XXVII–XXIII
17 84 105 VII, VIII XVII, XVIII 5/6 52 59 11 XVII–XX XXVII–XXIV
18 148 112 VII, VIII XVII, XVIII 5/6 51 58 12 XVII–XX XXVII–XXII
19 109 114 VII, VIII XVII, XVIII 5/6 64 59 12 XVII–XX XXVII–XXII
20 144 107 VII, VIII XVII, XVIII 5/6 53 60 11 XVII–XXI XXVII–XXIV
21 84 108 VII, VIII XVII, XVIII 5/6 64 61 15 XVII–XX XXVII–XXII

Variation:

The holotype measures 110 mm body length with 108 segments; the twenty one paratypes range in size from 80–148 mm (108±21.93 mm) body length with 85–114 segments (Table 2).

Type locality:

Tham Pha Tub Arboretum, Nan province, Thailand, 18°51'16.4"N, 100°44'10.1"E, 265 meters elevation (11th October 2009). We also collected another lot of further specimens from Tontong Waterfall, Nan province (location 3 in Figure 1), which is located about a hundred kilometers north of the type locality.

Etymology:

This species was named after the type locality, Tham Pha Tub Arboretum.

Type material:

The holotype (CUMZ 3204) and 15 paratypes (CUMZ 3205) and 10 paratypes (CUMZ 3212) are deposited in Chulalongkorn University, Museum of Zoology. Another four paratypes will be deposited in the Biozentrum Grindel und Zoologisches Museum, Hamburg, Germany (UHH), and three paratypes in the Natural History Museum, London (NHM).

Habitat:

Found in the top soil at about 10 cm depth, the soil surface was covered with leaf litter in a deciduous limestone forest at Tham Pha Tub Arboretum. The soil was carefully dug close to the casts. Many ariophantid snails, Cryptozona siamensis Pfeiffer, 1856 were on the ground or under leaf litter.

Diagnosis:

Amynthas phatubensis sp. n. is a medium to large sized terrestrial earthworm with a pair of mp surrounded by six genital papillae on segment XVIII. Within the zebrus-group, this species is diagnosed by the unique combination of dorsal pores in 5/6, simple digitate caeca, ventrally joined testis sacs, genital marking glands in the spermathecal segments, and the spermathecal characters of the large ovate ampulla, stalked diverticulum whose folds are membrane-bound, and spherical knob terminal diverticulum sac.

Remarks:

Amynthas phatubensis sp. n. has very simple characteristics of the genus, but among these, only the superficial male pores are external. In most newly collected specimens it was difficult to observe the pores or marks on the bodies. However, after preservation they can be seen more clearly. The internal organs are much more easily discerned. This new species is quite distinct when compared to the two closely related species from Laos, Amynthas chandyi Hong, 2008 and Amynthas namphouinensis Hong, 2008, which belong in the same zebrus-group. The two Laos species are a little bit smaller than Amynthas phatubensis sp. n., especially Amynthas chandyi. Even though Amynthas namphouinensis is much closer in appearance to Amynthas phatubensis sp. n., there are distinct differences between the type specimens (Figs 6 and 7). For example, the distance between the mp of Amynthas phatubensis sp. n. is 4.2 mm for the holotype and range from 3.0–4.5 mm (4.27±0.57mm), while for Amynthas namphouinensis this was significantly smaller, ranging from 1.4–1.5 mm. The distance between a pair of sp is also different, being 3.5–4.5 mm (4.12±0.4 mm) for Amynthas phatubensis sp. n. and 1.4–2.0 mm in Amynthas namphouinensis. The distance between the male pores as a fraction of the estimated circumference of the 18th segment is 0.30–0.33 in Amynthas phatubensis sp. n., but 0.10–0.14 circumference apart in Amynthas namphouinensis. Moreover, Amynthas phatubensis sp. n. has no genital marking glands on segments XVII–XIX, where Amynthas namphouinensis has sessile genital marking glands, but contains two distinct genital marking glands located close to sc that are absent in Amynthas namphouinensis.
Two populations of Amynthas phatubensis sp. n. were sampled, one from the type locality and one from Tontong waterfall. Distinct DNA barcode clusters corresponding to these populations had intra-cluster Kimura 2 parameter distances of 0.023 (N=9) and 0.016 (N=5) respectively. The inter-cluster divergence between the two populations is 0.084. Based on the morphological unity and the fact that the divergence is less than that usually seen between congeneric species pairs of earthworms (Chang et al. 2007[1]; Pérez-Losada et al. 2005[2], James et al. 2010[3]), we choose to maintain the two populations as representing one species. By contrast, the inter-cluster divergence between these populations and three other morpho-species with the same spermathecal battery, from the same two sites is in the range of 0.269-0.294. A consensus sequence from the type locality specimens is in Appendix 1. Another use of COI barcode sequence from type material is in Blakemore et al. (2010)[4].

Original Description

  • Bantaowong, U; Chanabun, R; Tongkerd, P; Sutcharit, C; James, S; Panha, S; 2011: New earthworm species of the genus Amynthas Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae) ZooKeys, 90: 35-62. doi

Other References

  1. ↑ Chang C, Lin Y, Chen I, Chuang S, Chen J (2007) Taxonomic re-evaluation of the Taiwanese montane earthworm Amynthas wulinensis Tsai, Shen & Tsai, 2001 (Oligochaeta: Megascolecidae): polytypic species or species complex?. Organism Diversity & Evolution 7:231-240.
  2. ↑ Pérez-Losada M, Eiroa J, Mato S, Domínguez J (2005) Phylogenetic species delimitation of the earthworm Eisenia fetida (Savigny, 1826) and Eisenia andrei (Bouché, 1972) (Oligochaeta, Lumbricidae) based on mitochondrial and nuclear DNA genes, Pedobiologia 49: 317–324.
  3. ↑ James S, Porco D, Decaëns T, Richard B, Rougerie R, et a (2010) DNA Barcoding Reveals Cryptic Diversity in Lumbricus terrestris L., 1758 (Clitellata): Resurrection of L. herculeus (Savigny, 1826). PLoS ONE 5(12): e15629. doi:10.1371/journal.pone.0015629
  4. ↑ Blakemore R, Kupriyanova E, Grygier M (2010) Neotypification of Drawida hattamimizu Hatai, 1930 (Annelida, Oligochaeta, Megadrili, Moniligastridae) as a model linking mtDNA (COI) sequences to an earthworm type, with a response to the ‘Can of Worms’ theory of cryptic species. Zookeys 41:1-29.

Images

Figure 1. Map of type locality of 1 Amynthas srinan sp. n. from Srinan National Park, Nan province, 2 Amynthas phatubensis sp. n. from Tham Pha Tub Arboretum, Nan province, 3 Amynthas tontong sp. n. from Tontong Waterfall, Pua district, Nan province and 4 Amynthas borealis sp. n. from a small hill near Chaloemprakiat district, Nan province.
Figure 1. Map of type locality of 1 Amynthas srinan sp. n. from Srinan National Park, Nan province, 2 Amynthas phatubensis sp. n. from Tham Pha Tub Arboretum, Nan province, 3 Amynthas tontong sp. n. from Tontong Waterfall, Pua district, Nan province and 4 Amynthas borealis sp. n. from a small hill near Chaloemprakiat district, Nan province. 
Figure 2. External and internal morphology of holotype (CUMZ 3204) of Amynthas phatubensis sp. n. A External ventral view, B internal dorsal view and C spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore.
Figure 2. External and internal morphology of holotype (CUMZ 3204) of Amynthas phatubensis sp. n. A External ventral view, B internal dorsal view and C spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore. 
Figure 6. External and internal morphology of holotype (BDNUL 0001) of Amynthas namphouinensis Hong, 2008 A External ventral view, B internal dorsal view and C spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore.
Figure 6. External and internal morphology of holotype (BDNUL 0001) of Amynthas namphouinensis Hong, 2008 A External ventral view, B internal dorsal view and C spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore. 
Figure 7. External and internal morphology of holotype (BDNUL 0002) of Amynthas chandyi Hong, 2008 A External ventral view, B internal dorsal view and C spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore.
Figure 7. External and internal morphology of holotype (BDNUL 0002) of Amynthas chandyi Hong, 2008 A External ventral view, B internal dorsal view and C spermatheca, and black arrow indicates the connection of the spermatheca and spermathecal pore. 
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