Leucothoe akaoni

From Species-ID
Jump to: navigation, search
Notice: This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.

If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly.

This page should be cited as follows (rationale):
White K, Reimer J (2012) Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers. ZooKeys 166 : 1–58, doi. Versioned wiki page: 2012-01-20, version 20695, https://species-id.net/w/index.php?title=Leucothoe_akaoni&oldid=20695 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{White2012ZooKeys166,
author = {White, Kristine N. AND Reimer, James Davis},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers},
year = {2012},
volume = {166},
issue = {},
pages = {1--58},
doi = {10.3897/zookeys.166.2313},
url = {http://www.pensoft.net/journals/zookeys/article/2313/abstract},
note = {Versioned wiki page: 2012-01-20, version 20695, https://species-id.net/w/index.php?title=Leucothoe_akaoni&oldid=20695 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers
A1 - White K
A1 - Reimer J
Y1 - 2012
JF - ZooKeys
JA -
VL - 166
IS -
UR - http://dx.doi.org/10.3897/zookeys.166.2313
SP - 1
EP - 58
PB - Pensoft Publishers
M1 - Versioned wiki page: 2012-01-20, version 20695, https://species-id.net/w/index.php?title=Leucothoe_akaoni&oldid=20695 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.166.2313

Wikipedia/ Citizendium:

<ref name="White2012ZooKeys166">{{Citation
| author = White K, Reimer J
| title = Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers
| journal = ZooKeys
| year = 2012
| volume = 166
| issue =
| pages = 1--58
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.166.2313
| url = http://www.pensoft.net/journals/zookeys/article/2313/abstract
| pmc =
| accessdate = 2019-06-20

}} Versioned wiki page: 2012-01-20, version 20695, https://species-id.net/w/index.php?title=Leucothoe_akaoni&oldid=20695 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Amphipoda
Familia: Leucothoidae
Genus: Leucothoe

Name

Leucothoe akaoni White & Reimer, 2012 sp. n.Wikispecies linkZooBank linkPensoft Profile

Type material

Holotype female, 9.6 mm RUMF-ZC-1732, Zanpa Cape, Okinawa–jima Island, Okinawa, reef wall (26°26'27"N ,127°43'03"E), in canals of large white ball sponge, Tetillidae of Sollas 1886[1], 30 m, Daisuke Ueno, col., 26 February 2011 (KNWOkinawa34C). Paratype male, 8.3 mm, RUMF-ZC-1733, Zanpa Cape, Okinawa–jima Island, Okinawa, reef wall (26°26'27"N, 127°43'03"E), in canals of large white ball sponge, 30–33 m, K.N. White and N.S. White, col., 3 April 2011 (KNWOkinawa40D).

Type locality

Zanpa Cape, Okinawa–jima Island, Okinawa, Japan (26°26'27"N, 127°43'03"E).

Additional material examined

1 specimen, RUMF-ZC-1734, KNW17Aug10; 1 specimen, NSMT-Cr 21871, KNWOkinawa10A; 3 specimens, NSMT-Cr 21872, KNWOkinawa15G; 2 specimens, RUMF-ZC-1735, KNWOkinawa16I; 2 specimens, RUMF-ZC-1736, KNWOkinawa29D; 0.5 specimen, NSMT-Cr 21873, KNWOkinawa34C; 15 specimens, NSMT-Cr 21874, KNWYaku2F; 1 specimen, RUMF-ZC-1737, KNWOkinawa40D.

Diagnosis (female)

Ventral cephalic keel anteroventral margin with anteriorly projecting cusp. Right mandible lacinia mobilis with 2 rows of dentition. Maxilliped inner plates with short serrate robust setae. Gnathopod 1 coxa anterior margin serrate; basis anterior margin with 12 medium-length setae, posterior margin with 14 short setae. Gnathopod 2 basis anterior margin with 33 medium-length setae, posterior margin with 7 setae, distal margin with 4 curved setae; ischium with several short posterior and distal setae and posterodistal serrations; carpus distally truncate.

Description (female)

Head. Anterior margin rounded, anterodistal margin evenly rounded; ventral cephalic keel anterior margin excavate, anteroventral margin with anteriorly projecting cusp, ventral margin straight; eyes present with more than 10 ommatidia, oval. Antenna 1 0.3 × body length, flagellum 10–articulate, peduncle article 1 width less than 2 × article 2, accessory flagellum absent. Antenna 2 0.3 × body length, subequal in length with antenna 1, flagellum 8–articulate. Mandibular palp ratio of articles 1–3 1.0: 2.6: 1.7, article 2 with 8–9 long distal setae, article 3 with 2 distal setae, incisors strongly dentate; left mandible with 16 raker spines, lacinia mobilis large, strongly toothed; right mandible with 14 raker spines, lacinia mobilis small, with 2 rows of dentition. Upper lip asymmetrically lobate, anterior margin setose. Lower lip inner lobes fused, bare; outer lobes with small gape, anterior margins setose. Maxilla 1 palp 2–articulate with 4 distal setae; outer plate with 9 distal robust setae and 4 distal slender setae. Maxilla 2 inner plate with 8 slender distal setae, 6 robust marginal setae, and facial setae; outer plate with 2 robust and 6 slender distal setae, 9 slender marginal setae, and facial setae. Maxilliped inner plates distal margin with a v-shaped indentation, with short serrate robust setae; outer plate inner margin smooth, reaching 0.3 × palp article 1, with simple marginal setae, facial setae present; palp article 4 subequal in length with article 3, distally acute.
Pereon. Coxae 1–4 relative widths 1.0: 1.3: 1.0: 1.4. Gnathopod 1 coxa with tiny marginal setae, anterior margin serrate, anterodistal margin produced, rounded, distal margin straight, posterior margin excavate, facial setae absent; basis slightly inflated, anterior margin with 12 short setae, posterior margin with 14 short setae; ischium with posterior setae; carpus linear, distal length 12.9 × width, proximal margin dentate, distal margin with 3 setae; propodus straight, palm dentate with 8 distal setae; dactylus smooth, reaching 0.5 × propodus length. Gnathopod 2 coxa broader than long, subequal in size with coxa 3, smooth, with tiny marginal setae; anterior margin straight, anterodistally rounded, distal margin straight, posterior margin straight, facial setae absent; basis slightly posteriorly expanded, anterior margin with 33 medium setae, posterior margin with 7 setae, distal margin with 4 curved setae; ischium with several short posterior and distal setae and posterodistal serrations; carpus 0.3 × propodus length, curved, distally truncate, anterior margin dentate; propodus with 1 mediofacial setal row displaced to midline, reaching 0.8 × propodus length, with 1 row of submarginal setae, posterior margin smooth, palm convex dentate; dactylus curved, proximal margin smooth, bare, anterior margin distally subacute, reaching 0.6 × propodus length. Pereopod 3 coxa length 1.3 × width, anterodistal corner overriding distal face of coxa 2 and extending below it, smooth, bare, anterior margin straight, distal margin oblique, posterior margin tapered, facial setae absent. Pereopod 4 coxa smooth, bare, anterior margin straight, distal margin evenly rounded, posterior margin tapered, facial setae absent. Pereopods 5–7 coxae facial setae absent; bases width length ratios 1: 1.4, 1: 1.4, 1: 1.3, posterior margins smooth, setose.
Pleon. Epimera 1 and 3 bare, epimeron 2 with ventral setae; epimeron 3 posteroventral corner subquadrate. Uropods 1–3 relative lengths 1.0: 0.8: 1.1. Uropod 1 peduncle and outer ramus 0.9 × inner ramus length; inner ramus with 3 robust setae; outer ramus with 7 robust setae. Uropod 2 peduncle length 0.7 × inner ramus length, outer ramus length 0.6 × inner ramus length; inner ramus with 4 robust setae; outer ramus with 7 robust setae. Uropod 3 peduncle 1.3 × inner ramus length, outer ramus length subequal in length with inner ramus; inner ramus with 4 robust setae; outer ramus with 5 robust setae. Telson 2.7 × longer than wide, apex strongly tridentate.
Male (sexually dimorphic characters).
Gnathopod 1 basis anterior margin with 7 setae, posterior margin with 5 setae. Gnathopod 2 basis anterior margin with 9 long setae, posterior margin bare; ischium with posterodistal setae, smooth.

Etymology

After the Japanese words ‘aka’, meaning ‘red’, and ‘oni’, meaning ‘barbarian’ and referring to the red color and large size (pronounced ah-ka-oh-nee).

Ecology

In canals of sponges, spiculose green ball sponge, ?Axinyssa of Lendenfeld 1897[2] (Figure 24E); spiculose beige sponge, Niphatidae of Van Soest 1980[3] (probably Niphates of Duchassaing and Michelotti 1864[4]), RUMF-ZP-6, KNWOkinawa10A (Figure 25I); large white ball sponge, Tetillidae, RUMF-ZP-11, KNWOkinawa40E (Figure 24I); and among coral rubble.

Relationships

Leucothoe akaoni sp. n. is similar to Leucothoe denticulata Costa, 1851 and Leucothoe wuriti Thomas & Klebba, 2007 in having a rounded head, ventral cephalic keel with projection, gnathopod 1 dactylus reaching greater than 0.2 × propodus length, and a truncate gnathopod 2 carpus. Leucothoe akaoni sp. n. differs from these species in lacking facial setae on coxa 1, having a setose posterior margin on the gnathopod 1 basis, gnathopod 2 basis anterior margin with more than 9 setae, slightly less broadly expanded bases on pereopods 5–7.

Remarks

Leucothoe akaoni sp. n. is deep red in color, darkest on the head, fading to deep orange posteriorly (Figure 23A). This species has been collected only on Yakushima Island, Kagoshima and from the northwestern coast of Okinawa–jima Island, Okinawa.

Distribution

East China Sea: Okinawa–jima Island (Okinawa), Yakushima (Kagoshima), Japan.

Original Description

  • White, K; Reimer, J; 2012: Commensal Leucothoidae (Crustacea, Amphipoda) of the Ryukyu Archipelago, Japan. Part II: sponge-dwellers ZooKeys, 166: 1-58. doi

Images

Other References

  1. 1.0 1.1 Sollas W (1886) Preliminary account of the Tetractinellid sponges Dredged by H.M.S. ‘Challenger’ 1872–76. Part I. The Choristida. Scientific Proceedings of the Royal Dublin Society (new series) 5: 177-199.
  2. 2.0 2.1 Lendenfeld R (1897) Spongien von Sansibar. Abhandlungen herausgegeben von der Senckenbergischen naturforschenden Gesellschaft 21: 93-133.
  3. Van Soest R (1980) Marine sponges from Curaçao and other Caribbean localities. Part II. Haplosclerida. In: Hummelinck P Van der Steen L (Ed). Uitgaven van de Natuurwetenschappelijke Studiekring voor Suriname en de Nederlandse Antillen. No. 104. Studies on the Fauna of Curaçao and other Caribbean Islands 62(191): 1-173.
  4. 4.0 4.1 4.2 4.3 Duchassaing De Fondbressin P, Michelotti G (1864) Spongiaires de la mer Caraibe. Natuurkundige verhandelingen van de Hollandsche maatschappij der wetenschappen te Haarlem 21 (2): 1-124.
  5. Thiele J (1903) Kieselschwämme von Ternate. II. Abhandlungen herausgegeben von der Senckenbergischen naturforschenden Gesellschaft 25: 933-968.
  6. Ridley S (1884) Spongiida. In: Report on the Zoological Collections made in the Indo–Pacific Ocean during the Voyage of H.M.S. ‘Alert’, 1881–2. British Museum of Natural History, London, 366–482, 582–630.
  7. Bowerbank J (1862) On the anatomy and physiology of the Spongiadae. Part III On the generic characters, the specific characters, and on the method of examination. Philosophical Transactions of the Royal Society 152 (2): 1087-1135.
  8. Poléjaeff N (1883) Report on the Calcarea dredged by H.M.S. ‘Challenger’, during the years 1873–1876. Report on the Scientific Results of the Voyage of H.M.S. ‘Challenger’, 1873–1876. Zoology 8 (2): 1-76.