Barringtonica, Shea & Colgan & Stanisic, 2012

Shea, M., Colgan, D. J. & Stanisic, J., 2012, 3585, Zootaxa 3585, pp. 1-109 : 60

Barringtonica n. gen.

Type species. Barringtonica polblue n. sp. –here designated.

Etymology. For the Barrington Tops.

Diagnosis. Shell very small, silky golden brown weakly planispiral to bi-concave with tightly coiled whorls the last inflated, spire slightly to strongly depressed. Protoconch sculpture spiral consisting of low, flattened, broad spiral cords, with distinct radial growth ripples developing near teleoconch junction; teleoconch with numerous prominent radial ribs; microsculpture cancellate with prominent microradial ribs and low microspiral cords. Aperture broadly ovately-lunate. Umbilicus U shaped to wide, cup-shaped. Penis with an expanded apical portion becoming tubular distally. Verge absent, no pilaster formation observed.

Distribution and habitat. Known from the volcanics of the western Barrington Tops rainforest massif off the Scone-Gloucester road and in upper Moonan Brook valley, east of Scone, NSW; found in sub-alpine woodland and vine thicket, living under logs and rocks.

Remarks. Barringtonica n. gen. is distinguished by the protoconch sculpture of numerous low flattened spiral cords and radial ridges which become prominent on the latter parts of the protoconch. Comboynea n. gen. has similar low spiral cords that are generally fewer in number, and indistinct underlying radial ridges. Anatomically it differs from both Cumberlandica and Planorbacochlea (most species) chiefly by the lack of a penial verge. The absence of any pilaster formation would seem to indicate that the male reproductive system in the material studied was either immature or seasonally under-developed.