Velacumantus australis, (QUOY & GAIMARD, 1834)

Strong, Ellen E., 2011, More than a gut feeling: utility of midgut anatomy in phylogeny of the Cerithioidea (Mollusca: Caenogastropoda), Zoological Journal of the Linnean Society 162 (3), pp. 585-630 : 590-591

VELACUMANTUS AUSTRALIS (QUOY & GAIMARD, 1834)

Material examined

South Pacific Ocean : Australia: NSW: Narrabeen Lagoon, 33°52.0′S, 151°08.8′E ( USNM 1083383 ); WA: Nedlands, Perth ( USNM 794752 ) .

Description

Marginal fold S-shaped ( Fig. 3B ), terminating at posterior tip of sorting area; oesophageal aperture at tip of marginal fold recurved segment; sorting area rectangular, tapering, curving posteriorly to pointed tip; left margin of sorting area with slight anterior bulge; large, flattened, rounded sorting area pad present at left, posterior end of sorting area, with fine, subparallel striae on surface; accessory marginal fold straight, forming deep pocket overhanging posterior tip of sorting area; anterior flap and crescentic pads lacking; large glandular pad forming long, tall narrow mound, extending far posterior to gastric shield; single digestive gland duct opening at left of glandular pad; crescentic ridge long, curving, adhering closely to glandular pad, extending from digestive gland duct to right side of glandular pad just behind gastric shield (gs); proximal crescentic ridge paired; accessory pads, caecum, and caecal folds lacking; U-shaped fold present below lip of style sac; typhlosoles unfused.

Figures

Figure 3. Midgut anatomy of Batillariidae. A, Pyrazus ebeninus (USNM 828830). B, Velacumantus australis (USNM 1083383). Scale bars: 1 mm; refer to the text for a list of anatomical abbreviations.