AMPLIRHAGADA TURBINENSIS SP. NOV.

FIGURES 7S, 16, 17

Type locality: Western Australia, Kimberley, Bonaparte Archipelago, Turbin Island, 14°28′55.1″S, 125°00′03.9″E .

Material examined (Table 1): Holotype WAM S42945 (dissected specimen) . Paratypes WAM S42946 (four preserved specimens) .

Etymology: For Turbin Island, adjective of feminine gender.

Description: Shell (Fig. 7S) globose to broadly conical with medium high spire, thick, periphery evenly rounded (Table 3); background and ventral colour crème, with well-marked brown, sub-sutural, and mid-whorl bands; outer lip white; teleoconch with axial growth lines only. Umbilicus 90–100% concealed by columellar reflection (Table 4). Aperture simple, slightly to well expanded, slightly reflected, with weak or wanting basal node. Genital anatomy (Figs 16, 17). Penis tubular, long, straight; vas deferens entering penial sheath about half way up, penial retractor muscle short; penial verge rather short (1/8 length of penial chamber), pointed; inner penial wall with narrow, conical, regularly corrugated main pilaster, tapering in prominence and thickness towards both ends; entire inner penial wall with large, rounded pustules, fused to each other forming indistinct, corrugated longitudinal pilasters. Vagina moderate in length (shorter than penis), inflated; bursa copulatrix moderately long, extending to anterior end of spermoviduct, with weakly inflated head.

Comparative remarks: Shell most similar to A. berthierana in shape and colour but smaller. Differs most conspicuously by inner penial wall anatomy with rather large, rounded pustules, fused to form corrugated longitudinal pilasters while A. berthierana has very fine pustulation and A. intermedia rhomboid pustules.

Distribution: Turbin Island only (Fig. 6).