Comboynea, Shea & Colgan & Stanisic, 2012

Shea, M., Colgan, D. J. & Stanisic, J., 2012, 3585, Zootaxa 3585, pp. 1-109 : 71-72

Comboynea n. gen.

? Gyrocochlea Hedley, 1924: 215 (in part); Iredale 1937: 322 (in part); Iredale 1941a: 267 (in part); Smith 1992: 190 (in part);

Stanisic et al. 2010: 196 (in part).

Type species. Comboynea boorganna n. sp. —here designated.

Etymology. For the Comboyne Plateau.

Diagnosis. Shell very small, orange brown, biconcave or discoidal/planate with tightly coiled whorls, the last inflated. Protoconch sculpture primarily spiral with numerous, prominent, low crowded spiral cords and extremely weak, irregularly spaced, underlying radial ridges; teleoconch with many sinuate radial ribs; microsculpture cancellate consisting of prominent microradial ribs and low microspiral cords, beaded at their intersection. Aperture narrowly to broadly ovately-lunate. Umbilicus wide U-shaped to wide cup-shaped. Penis tubular with an apical verge that has a lateral pore; longitudinal ridge-shaped pilasters present. Epiphallus shorter than penis.

Distribution and habitat. From the Port Stephens area northward to the Manning River drainage basin, NSW; found in rainforest on volcanics, living under logs and rocks.

Remarks. Comboynea gen nov. is distinguished from Barringtonica by the combination of protoconch sculpture and penial anatomy. In Comboynea the penis has a verge, and the protoconch sculpture weakly cancellate, consisting of broad spiral cords and very weak underlying radial ridges throughout; in Barringtonica the verge is absent and the protoconch sculpture is chiefly spiral, with radial ridges that develop only toward the protoconch/teleoconch boundary.