Discartemon kotanensis

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Siriboon T, Sutcharit C, Naggs F, Rowson B, Panha S (2014) Revision of the carnivorous snail genus Discartemon Pfeiffer, 1856, with description of twelve new species (Pulmonata, Streptaxidae). ZooKeys 401 : 45–107, doi. Versioned wiki page: 2014-04-14, version 44244, https://species-id.net/w/index.php?title=Discartemon_kotanensis&oldid=44244 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Siriboon2014ZooKeys401,
author = {Siriboon, Thanit, Sutcharit, Chirasak, Naggs, Fred, Rowson, Ben AND Panha, Somsak},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Revision of the carnivorous snail genus Discartemon Pfeiffer, 1856, with description of twelve new species (Pulmonata, Streptaxidae)},
year = {2014},
volume = {401},
issue = {},
pages = {45--107},
doi = {10.3897/zookeys.401.7075},
url = {http://www.pensoft.net/journals/zookeys/article/7075/abstract},
note = {Versioned wiki page: 2014-04-14, version 44244, https://species-id.net/w/index.php?title=Discartemon_kotanensis&oldid=44244 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Revision of the carnivorous snail genus Discartemon Pfeiffer, 1856, with description of twelve new species (Pulmonata, Streptaxidae)
A1 - Siriboon T, Sutcharit C, Naggs F, Rowson B
A1 - Panha S
Y1 - 2014
JF - ZooKeys
JA -
VL - 401
IS -
UR - http://dx.doi.org/10.3897/zookeys.401.7075
SP - 45
EP - 107
PB - Pensoft Publishers
M1 - Versioned wiki page: 2014-04-14, version 44244, https://species-id.net/w/index.php?title=Discartemon_kotanensis&oldid=44244 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.401.7075

Wikipedia/ Citizendium:

<ref name="Siriboon2014ZooKeys401">{{Citation
| author = Siriboon T, Sutcharit C, Naggs F, Rowson B, Panha S
| title = Revision of the carnivorous snail genus Discartemon Pfeiffer, 1856, with description of twelve new species (Pulmonata, Streptaxidae)
| journal = ZooKeys
| year = 2014
| volume = 401
| issue =
| pages = 45--107
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.401.7075
| url = http://www.pensoft.net/journals/zookeys/article/7075/abstract
| pmc =
| accessdate = 2020-10-31

}} Versioned wiki page: 2014-04-14, version 44244, https://species-id.net/w/index.php?title=Discartemon_kotanensis&oldid=44244 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Pulmonata
Familia: Streptaxidae
Genus: Discartemon

Name

Discartemon kotanensis Siriboon & Panha sp. n.Wikispecies linkZooBank linkPensoft Profile

Type material

Holotype CUMZ 6252 (Fig. 9G). Measurement: shell height 6.3 mm, shell width 9.2 mm, and with 6 whorls. Paratypes: CUMZ 4220 (27 shells), 6230 (15 specimens in ethanol; Figs 3D, 15D–F, 20F–J, 22F), NHMUK 20130680 (2 shells), and SMF (2 shells) from the type locality.

Type locality

Ko Tan, Samui, Suratthani, Thailand, 9°22'18.9"N, 99°56'53.7"E.

Other material examined

Nam Tok Tone Nga Chang, Had Yai, Songkhla: CUMZ 6231 (4 specimens in ethanol). Ban Chang Lang, Si-kao, Trang: CUMZ 6232 (2 specimens in ethanol).

Diagnosis

Conchologically this new species superficially resembles Discartemon roebeleni and Discartemon megalostraka sp. n. It differs from Discartemon roebeleni in having a higher spire, a very long penis, a penial sheath extending fourth-fifths of the penis length, a smooth atrium wall with atrial pores, and a short seminal vesicle. It differs from Discartemon megalostraka sp. n. in having a smaller shell and apertural dentition of four lamellae, and a shorter free oviduct, vas deferens and seminal vesicle. Discartemon kotanensis sp. n. differs from Discartemon stenostomus and Discartemon collingei in having a higher spire, transverse ridges reaching the periphery, the last whorl rounded and regularly coiled, and apertural dentition of one straight parietal, one basal and one columellar lamella. Also, Discartemon collingei is slightly axially deflected.

Description

Shell. Shell globose-heliciform, white and translucent; whorls 6–6½, spire elevated conical, with distinct suture. Shell surface glossy, with transverse ridges that diminish below periphery; varices present. Embryonic shell large, about 2½ whorls, with a smooth surface; following whorls regularly coiled. Last whorl rounded and regularly expanded; umbilicus widely open and deep. Aperture sub-quadrangular; peristome discontinuous, thickened, expanded and reflected. Apertural dentition of one strong parietal, one palatal, one basal and one columellar lamella (Fig. 9G).
Radula. Each row consists of 27–31 teeth with formula (13-15)-1-(13-15). The central tooth is very small and triangular with a pointed cusp. Lateral and marginal teeth are undifferentiated, unicuspid and lanceolate. Latero-marginal teeth gradually reduce in size, with outermost teeth much smaller and shorter than inner teeth (Fig. 22F).
Genital organs. Atrium (at) short. Penis (p) very long and slender. Penial sheath (ps) thin and extending about fourth-fifths of penis length, and penial sheath retractor muscle (psr) very thin, originating at genital orifice wall and inserting distally on penial sheath (Fig. 15D). Vas deferens (vd) passes a very short distance through penial sheath before entering into penis distally (Fig. 15E). Penial retractor muscle (pr) thin and very long, inserting at penis and vas deferens junction.
Internal wall of atrium generally smooth with atrial pores (Fig. 20F). Penial wall with dense and transparent penial hooks, about 20 hooks/200 µm2 (Fig. 20H). Hooks located on short penial papillae (pp). Penial hooks small (<0.03 mm in length), expanded at base, tips pointed and curved towards genital orifice (Fig. 20I).
Vagina (v) short, about one-fifth of penis length. Gametolytic duct (gd) a long tube extending as far as albumin gland; gametolytic sac (gs) ovate. Free oviduct (fo) short, of about same length as vagina. Oviduct (ov) slender and folded; prostate gland inconspicuous. Talon (ta) small, very short and club shaped. Hermaphroditic duct (hd) bearing long seminal vesicle (sv) about twice as long as the length from talon to branching point of seminal vesicle (Fig. 15F).
Vaginal wall generally with longitudinal vaginal folds (Fig. 20J).

Etymology

The specific epithet is derived from the type locality of this new species, the Ko Tan, Ko Samui, Suratthani Province.

Distribution

This species is known from the type locality and few limestone outcrops on the southern mainland.

Remarks

Shells of this species from Samui, Suratthani were originally thought to belong to Discartemon roebeleni. After the genital system of Discartemon kotanensis sp. n. was examined and critically investigated, it was considered distinct enough to be a separate species.

Original Description

  • Siriboon, T; Sutcharit, C; Naggs, F; Rowson, B; Panha, S; 2014: Revision of the carnivorous snail genus Discartemon Pfeiffer, 1856, with description of twelve new species (Pulmonata, Streptaxidae) ZooKeys, 401: 45-107. doi

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