Philalanka anomphala Vermeulen, Liew & Schilthuizen

Vermeulen, Jaap J., Liew, Thor-Seng & Schilthuizen, Menno, 2015, Additions to the knowledge of the land snails of Sabah (Malaysia, Borneo), including 48 new species, ZooKeys 531, pp. 1-139: 58

publication ID

http://dx.doi.org/10.3897/zookeys.531.6097

publication LSID

lsid:zoobank.org:pub:C845838E-C912-4BD8-AB4E-07980F91959E

persistent identifier

http://treatment.plazi.org/id/CCCAE19A-42F7-4895-A132-DBA3943968C1

taxon LSID

lsid:zoobank.org:act:CCCAE19A-42F7-4895-A132-DBA3943968C1

treatment provided by

ZooKeys by Pensoft

scientific name

Philalanka anomphala Vermeulen, Liew & Schilthuizen
status

sp. n.

Taxon classification Animalia Stylommatophora Endodontidae

Philalanka anomphala Vermeulen, Liew & Schilthuizen  sp. n. Figure 47

Holotype. Malaysia, Sabah, West Coast Province , Kinabalu N.P. , Mesilau trail ( RMNH.5003940). View Materials 

Examined material from Sabah.

West Coast Province. Kinabalu N.P., near Kotal route at 2376 m (leg. T.S. Liew, J. Lapidin, Safrie & Jasilin, BOR/MOL 4202, V 14335); Mesilau trail between 2112 and 2356 m (leg. T.S. Liew, BOR/MOL 4204, BOR/MOL 4206, V 14334; leg. T.S. Liew & J. Lapidin, BOR/MOL 4205); Summit trail at 2308 m (leg. T.S. Liew, BOR/MOL 4203).

Description.

Shell very small, thin, hardly translucent, yellow-corneous, low-conical with slightly convex sides; apex somewhat flattened. Surface glossy. Whorls convex, rounded. Protoconch whorls convex; surface almost smooth, the slightest traces of a very fine (just visible at 40 times magnification), dense spiral striation, as well as some traces of radial sculpture. Teleoconch: Last whorl with a thin, inconspicuous (conspicuous in juveniles) spiral thread following the periphery and coinciding with the suture of the penultimate whorl; above this traces of very fine (just visible at 40 times magnification), rather dense spiral striation, below the periphery with a similar, but widely spaced, striation; this spiral striation subordinate to rather coarse, moderately spaced but irregularly placed, usually somewhat sunk growth lines above the periphery, radial sculpture below the periphery less conspicuous. Umbilicus closed, rimate in juveniles. Dimensions: Height up to c. 1.75 mm; width up to c. 2.3 mm; diameters of the first three whorls c. 0.75 mm, c. 1.25 mm, c. 1.9 mm respectively; number of whorls up to c. 3 5/8; height aperture up to 1.0 mm; width aperture up to 1.2 mm.

Habitat in Sabah and distribution.

Montane forest on sandstone soil. Alt. 2100-2400 m. Sabah: Mount Kinabalu. Endemic to Sabah.

Cross diagnosis.

Differs from Philalanka rugulosa  and Philalanka malimgunung  , as well as from the similar looking species Philalanka lieftincki  Van Benthem Jutting (Indonesia, Ambon), and Philalanka micromphala  Van Benthem Jutting (Indonesia, Java), by having a closed umbilicus.

Etymology.

The name refers to the absence of an umbilicus [an-omphalos (Gr.) = without umbilicus].