Discartemon circulus

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This page should be cited as follows (rationale):
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 44212, https://species-id.net/w/index.php?title=Discartemon_circulus&oldid=44212 , 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 44212, https://species-id.net/w/index.php?title=Discartemon_circulus&oldid=44212 , 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 44212, https://species-id.net/w/index.php?title=Discartemon_circulus&oldid=44212 , 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 44212, https://species-id.net/w/index.php?title=Discartemon_circulus&oldid=44212 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Pulmonata
Familia: Streptaxidae
Genus: Discartemon

Name

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

Type material

Holotype CUMZ 6246 (Fig. 5C). Measurement: shell height 3.9 mm, shell width 7.7 mm, and with 6 whorls. Paratypes: CUMZ 3665 (9 shells), 6262 (8 shells), NHMUK 20130674 (2 shells), and SMF (2 shells) from the type locality.

Type locality

Tam Phannara, Nakhon Si Thammarat, Thailand, 8°25'18.8"N, 99°22'46.8"E.

Diagnosis

Discartemon circulus sp. n. differs from Discartemon discus and Discartemon sykesi in its narrower umbilicus, sub-quadrangular aperture, and apertural dentition with five lamellae. In addition, Discartemon discus has a larger shell, while Discartemon sykesi has an intermediately expanded last whorl and a sinulus. Compared with Discartemon khaosokensis, Discartemon circulus sp. n. has a smaller shell, a flattened spire with weak transverse ridges, an angular last whorl, a sinulus, and five apertural lamellae. Discartemon circulus sp. n. differs from Discartemon discadentus sp. n. and Discartemon discamaximus sp. n. in having a smaller shell with weak transverse ridges and five apertural lamellae. Compared with Discartemon expandus sp. n., Discartemon circulus sp. n. has weaker transverse ridges, a regularly expanded peristome, and five apertural lamellae.

Description

Shell. Shell flattened, white and translucent; whorls 5½–6, spire flattened, with a distinct suture. Shell surface glossy with weak transverse ridges and varices present. Embryonic shell large, about 2½ whorls, with a smooth surface; following whorls regularly coiled. Last whorl angular, regularly expanded; umbilicus very wide, deep and showing all preceding whorls. Aperture sub-quadrangular; peristome discontinuous, thin and expanded. Apertural dentition with one parietal, one palatal, one small basal, one small columellar and one small supracolumellar lamella (Fig. 5C).

Etymology

The specific epithet is from the Latin “circulus” meaning “circle”. It refers to the appearance of this new species when seen from the apex.

Distribution

This species is known only from the type locality, an isolated limestone hill which reaches about 200 meters amsl, about 20 km southwest of Tai Rom Yen National Park.

Remarks

Apparently rare and extensive searching revealed no living examples.

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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