Plectostoma senex

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This page should be cited as follows (rationale):
Liew T, Vermeulen J, Marzuki M, Schilthuizen M (2014) A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina. ZooKeys 393 : 1–107, doi. Versioned wiki page: 2014-03-25, version 43812, https://species-id.net/w/index.php?title=Plectostoma_senex&oldid=43812 , contributors (alphabetical order): Pensoft Publishers.

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BibTeX:

@article{Liew2014ZooKeys393,
author = {Liew, Thor-Seng, Vermeulen, Jaap Jan, Marzuki, Mohammad Effendi bin AND Schilthuizen, Menno},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina},
year = {2014},
volume = {393},
issue = {},
pages = {1--107},
doi = {10.3897/zookeys.393.6717},
url = {http://www.pensoft.net/journals/zookeys/article/6717/abstract},
note = {Versioned wiki page: 2014-03-25, version 43812, https://species-id.net/w/index.php?title=Plectostoma_senex&oldid=43812 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina
A1 - Liew T, Vermeulen J, Marzuki M
A1 - Schilthuizen M
Y1 - 2014
JF - ZooKeys
JA -
VL - 393
IS -
UR - http://dx.doi.org/10.3897/zookeys.393.6717
SP - 1
EP - 107
PB - Pensoft Publishers
M1 - Versioned wiki page: 2014-03-25, version 43812, https://species-id.net/w/index.php?title=Plectostoma_senex&oldid=43812 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.393.6717

Wikipedia/ Citizendium:

<ref name="Liew2014ZooKeys393">{{Citation
| author = Liew T, Vermeulen J, Marzuki M, Schilthuizen M
| title = A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina
| journal = ZooKeys
| year = 2014
| volume = 393
| issue =
| pages = 1--107
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.393.6717
| url = http://www.pensoft.net/journals/zookeys/article/6717/abstract
| pmc =
| accessdate = 2019-06-20

}} Versioned wiki page: 2014-03-25, version 43812, https://species-id.net/w/index.php?title=Plectostoma_senex&oldid=43812 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Architaenioglossa
Familia: Diplommatinidae
Genus: Plectostoma

Name

Plectostoma senex (van Benthem Jutting, 1952)Wikispecies linkPensoft Profile

Type material

Holotype: ZMA 136052(1) (Seen). Paratypes: ZMA 136053(>10) (Seen).

Other examined materials

RMNH 44723(5), BOR 460(1), BOR 5575(3), BOR 5603(2), BOR 5628(>100), BOR 5631(>10), V 5117(9).

Diagnosis

Shares with Plectostoma sciaphilum and Plectostoma turriforme the tuba form, but differs by having two knob-shaped constriction teeth and fewer than 6 whorls.

Description

Apex. Shape: distinctly convex.
Spire. Height: 2.6–3.1 mm. Width: 1.6–1.7 mm. Number of whorls: 5 1/8–5 5/8. Apical spire shape: oblong conical. Basal spire shape: ovoid. Whorl periphery: moderately to distinctly convex. Umbilicus: completely closed by tuba.
Constriction. Parietal teeth: two. Basal teeth: one transverse tooth.
Tuba. Coiling direction: type 3 and aperture visible in left lateral view. Tuba whorl length in proportion to spire last whorl: ca. 3/8. Proportion of tuba that attaches to spire: whole.
Aperture and peristome. Peristome: double peristomes. Outer peristome shape: same as inner peristome and uniformly projected all around, except the posterior part.
Spiral lines. Thick lines: absent. Thin lines: present.
Radial ribs. Rib density: 4 ribs per mm. Rib intensity: thin. Shape: slightly curved. Inclination: orthoclin.

Distribution

Type locality. Gua Charas, limestone hill near Sungai Lembing in the state of Pahang, Malaysia (3°54'27"N, 103°8'47"E).
Distribution range. In addition to the type locality, this species had been recorded from Bukit Panching (Figure 18A).

Conservation status

Critically Endangered (B2ab(iii)+C2a(i) ver. 10.1). This species is known from two locations. One of these, Bukit Panching, does not exist anymore. Two intensive surveys at the other location, Bukit Charas, were conducted in Feb. 2010 and May 2011. Two living populations with fewer than 50 individuals were found at wet staglamites near the cave. No other living population was found elsewhere on Bukit Charas. The status of this species in a previous assessment (IUCN redlist) was: vulnerable D2 ver. 3.1 (Clements 2009b[1]).

Discussion

See discussion under Plectostoma turriforme.

Taxon Treatment

  • Liew, T; Vermeulen, J; Marzuki, M; Schilthuizen, M; 2014: A cybertaxonomic revision of the micro-landsnail genus Plectostoma Adam (Mollusca, Caenogastropoda, Diplommatinidae), from Peninsular Malaysia, Sumatra and Indochina ZooKeys, 393: 1-107. doi

Other References

  1. Clements R (2009b) Opisthostoma senex. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. www.iucnredlist.org [accessed on 26 November 2013]

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