Land snail diversity in the monsoon tropics of Northern Australia: revision of the genus Exiligada Iredale, 1939 (Mollusca: Pulmonata: Camaenidae), with description of 13 new species Author Criscione, Francesco Author Law, Margot Louisa Author Köhler, Frank text Zoological Journal of the Linnean Society 2012 Zool. J. Linn. Soc. 2012-11-26 166 4 689 722 http://dx.doi.org/10.1111/j.1096-3642.2012.00863.x journal article 10.1111/j.1096-3642.2012.00863.x 0024-4082 5409181 AC086999-76A8-4F93-9A51-5B5B213A50E6 EXILIGADA LIMBUNYA SP. NOV. ( FIGS 5F , 12D–F ) Holotype : AUSTRALIA , NT , VRD , 27 km southwest of Limbunya Station , limestone outcrop with small vine thicket patches, in talus, 17°28 ′ 27.0 ′′ S , 129°53 ′ 14.0 ′′ E (coll. T. Parkin , 23.vii.2010 ), dry ( AM C.475866). Paratypes : AUSTRALIA , NT , VRD , same data as for holotype, 30 dry ( AM C.470205) . Other material: AUSTRALIA , NT, VRD, 27.2 km south-west of Limbunya Station, small limestone outcrops with very small vine thicket patches, in talus, 55 dry (AM C.470200). Figure 12. SEM micrographs of Exiligada shells. A-C, E. gregoriana sp. nov. (paratype AM C.462768). A, Apical view showing protoconch and first whorl. B, Close-up from above of sculpture across entire shell. C, Microsculpture on teleoconch whorl. D-F, E. limbunya sp. nov. (holotype C.475866). D, Apical view showing protoconch and first whorl. E, Close-up from above of sculpture across entire shell. F, Microsculpture on teleoconch whorl. Scale bars: A-B, D-E = 1 mm, C, F = 0.5 mm. Etymology: In reference to the type locality, Limbunya Station, noun in apposition. Description: Shell ( Figs 5F , 12D–F ). Small, weakly elevated, thin; micropustulations present; background colour brownish horn fading to whitish towards shell base, with one faint to very conspicuous, brownreddish peripheral band; no maculations. Remarks: Species only known from dry shells, which differ significantly from all other congeners permitting recognition as a distinct species. Smallest shell of the genus, with lowest number of whorls and lowest height, diameter and H/D ratio. Micropustulation as fine as in E. calciphila , E. floraevallis , and E. unistriata . Shell colour pattern similar to E. calciphila , E. floraevallis , E. gregoriana , E. rivifontis , and E. unistriata . This species co-occurs with its putative sister species E. unistriata and shares the same shell coloration.