Nanotrachia, 2013

Köhler, Frank & Criscione, Francesco, 2013, Small snails in a big place: a radiation in the semi-arid rangelands in northern Australia (Eupulmonata, Camaenidae, Nanotrachia gen. nov.), Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 169 (1), pp. 103-123 : 120-121

publication ID

https://doi.org/ 10.1111/zoj.12051

publication LSID

lsid:zoobank.org:pub:281CB6ED-063E-4CF0-89A2-80EB3761BCDB

DOI

https://doi.org/10.5281/zenodo.4890445

persistent identifier

https://treatment.plazi.org/id/B2540735-D546-40A8-94E2-83957E9AD734

taxon LSID

lsid:zoobank.org:act:B2540735-D546-40A8-94E2-83957E9AD734

treatment provided by

Carolina

scientific name

Nanotrachia
status

subsp. nov.

NANOTRACHIA COSTULATA COSTULATA View in CoL SSP. NOV.

Holotype

Australia, WA, EK, 12.3 km east of Spring Creek Station Homestead , east of Duncan Highway, low exposed hills with limestone cliffs of 2–3 m in height, Spinifex , few fig trees, under slabs in loose soil, 16°59′57″S, 128°58′34″E (coll. V. Kessner, 30 August 2009); dissected specimen ( WAM S66302). GoogleMaps

Paratypes

Same as holotype; 11 wet ( WAM S49191 View Materials ), 11 dry ( WAM S49073 View Materials ) .

Other material: Table 1.

Etymology

In reference to the shell sculpture of axial ribs, derived from ‘costulatus’ (Latin = exhibiting ribs), adjective of feminine gender.

Description

Shell ( Figs 4D View Figure 4 , 5E, F View Figure 5 ): Average in size; periphery shouldered, weakly keeled; spire weakly elevated; umbilicus open, wide, sometimes partly concealed by columellar reflection; protoconch and teleoconch with dense, pointed periostracal projections and fine axial growth lines; teleoconch with prominent, blunt, widely spaced axial ribs; apertural lip reflected, moderately expanded; horn.

Genitalia ( Fig. 7A, B View Figure 7 ): Epiphallus long, thick, tapering in thickness, length equivalent to 50–70% of penis; thick muscular fibres connecting distal portion of epiphallus to penial apex. Vas deferens entering penial sheath almost halfway up. Inner penial wall with up to four, mostly narrow, nearly straight longitudinal pilasters comprising entire length of penial wall.

Vagina half as long as penis, half to twice as long as free oviduct.

Comparative remarks

Shell similar to N. intermedia both in size and shape, differing from N. carinata sp. nov., N. coronata sp. nov., and N. orientalis by less developed keel, and from N. levis sp. nov. by presence of axial ribs. Genitalia of N. carinata sp. nov., N. coronata sp. nov., and N. levis sp. nov. differ by having corrugated penial wall pilasters; N. intermedia has only one penial wall pilaster.

WAM

Western Australian Museum

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