Plectostoma tohchinyawi

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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 43842, https://species-id.net/w/index.php?title=Plectostoma_tohchinyawi&oldid=43842 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

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 43842, https://species-id.net/w/index.php?title=Plectostoma_tohchinyawi&oldid=43842 , 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 43842, https://species-id.net/w/index.php?title=Plectostoma_tohchinyawi&oldid=43842 , 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 = 2019-11-12

}} Versioned wiki page: 2014-03-25, version 43842, https://species-id.net/w/index.php?title=Plectostoma_tohchinyawi&oldid=43842 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Architaenioglossa
Familia: Diplommatinidae
Genus: Plectostoma

Name

Plectostoma tohchinyawi Liew, Vermeulen, Marzuki & Schilthuizen, 2014 sp. n.Wikispecies linkZooBank linkPensoft Profile

Type material

Holotype: BOR 5649(1). Paratypes: BOR 5533(>10), BOR 5534(>10), BOR 5535(>10), V 8811(>25).

Diagnosis

Shares with Plectostoma charasense, Plectostoma kitteli, and Plectostoma klongsangensis the general shell form, in terms of apex, spire, and tuba shape, but differs by having both thin and thick spiral lines, and the left lateral side of outer peristome projected not more than twice the width of the right lateral side of outer peristome.

Etymology

This species is named after Dato’ Toh Chin Yaw, who was the Chairman of Industry, Trade and Environment Committee in the Terengganu State Government between 2008 and 2013. It is rare to find politicians working closely with the public for wildlife conservation. During his time in office, Dato’ Toh was tireless in his efforts to promote and preserve Terengganu’s natural heritage. One of his most influential decisions was getting the State to ban the hunting of threatened flying foxes (Pteropus vampyrus). Before he left office, he was working with scientists to gazette the Kenyir Wildlife Corridor as a protected area and was helping to secure funds to improve anti-poaching efforts in that area.

Description

Apex. Shape: distinctly convex.
Spire. Height: 2.1–2.4 mm. Width: 1.3–1.5 mm. Number of whorls: 4 7/8–5 3/8. Apical spire shape: oblong conical. Basal spire shape: conical. Whorl periphery: distinctly convex. Umbilicus: open.
Constriction. Parietal teeth: two. Basal teeth: none.
Tuba. Coiling direction: type 2 and aperture visible in right lateral view. Tuba whorl length in proportion to spire last whorl: ca. 7/8–8/8. Proportion of tuba that attaches to spire: less than 1/2.
Aperture and peristome. Peristome: double peristomes. Outer peristome shape: similar to inner peristome, projected all around, except the posterior part, where the two lateral sides are distinctly more projected than the anterior side.
Spiral lines. Thick lines: present. Thin lines: present.
Radial ribs. Rib density: 4–6 ribs per mm. Rib intensity: thick. Shape: slightly curved to single-humped. Inclination: prosoclin.

Distribution

Type locality. Gua Bewah, Tasik Kenyir (4°51'3"N, 102°43'21"E).
Distribution range. To date, this species is only known to occur at two neighbouring limestone outcrops, namely, Gua Bewah and Gua Taat at the Southern part of Tasik Kenyir (Figure 18B).

Conservation status

Least concern. The only two limestone outcrops where this species was found are partially submerged in Southeast Asia’s largest man-made lake, Tasik Kenyir. Nonetheless, there is good forest cover around and on the limestone outcrops. Furthermore, these two hills are located in the Taman Negara Pahang, which is a prioritised protected area.

Discussion

From a conchological point of view, this species is related to Plectostoma charasense. Both are thought to be affiliated with the Plectostoma species from North Borneo. Plectostoma tohchinyawi has a high conical spire, thick and projected radial ribs, and a long detached tuba. These are the typical characteristics for dozens of Plectostoma species in North Borneo. In addition, Plectostoma tohchinyawi and Plectostoma charasense live on the five lenticular limestone outcrops that are the easternmost outcrops of the Malay Peninsula, thus closest geographically to Borneo (Figure 18B).

Original Description

  • 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

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