More than a gut feeling: utility of midgut anatomy in phylogeny of the Cerithioidea (Mollusca: Caenogastropoda)
Strong, Ellen E.
Zoological Journal of the Linnean Society
2011
2011-01-21
162
3
585
630
7TC8J
(MORCH, 1852)
MORCH
1852
[210,692,797,819]
Gastropoda
Potamididae
Terebralia
Animalia
16
601
Mollusca
species
semistriata
Material examined South Pacific Ocean: Australia: QLD: Cockle Bay, Magnetic Island, 19°08.0′S, 146°50.0′E( USNM 828806); Cairns: Airport Mangrove Boardwalk, 16°53.0′S, 145°45.7′E( USNM 1083479). Description Marginal fold S-shaped ( Fig. 10C), terminating at posterior tip of sorting area; oesophageal aperture at tip of marginal fold recurved segment; sorting area rectangular, with broadly rounded posterior margin; anterior sorting area modified into prominent concave flap; left margin of sorting area with slight bulge posteriorly bordering flap; accessory marginal fold straight along sorting area left margin, extending far posteriorly into gastric chamber along left side of roof; sorting area pad and crescentic pads lacking; glandular pad large, elongate, flattened with narrow stalk, extending far posterior to gastric shield; paired digestive gland ducts opening at left of glandular pad; crescentic ridge long, extending from oesophageal aperture, past digestive gland ducts, curving around posterior end of glandular pad, fusing to side of pad slightly behind gastric shield, with distal tip curving slightly into caecum; shallow caecum present opposite three caecal folds; small accessory pad present (not visible) at anterior end of glandular pad, opposite major typhlosole; U-shaped fold present below style sac aperture; style sac extremely long, extending into mantle roof; typhlosoles fused along entire length. Remarks The present description agrees closely with that of Terebralia sulcata( Houbrick, 1991b: fig. 17), although Houbrick (1991b)noted the presence of only a single duct of the digestive gland, the caecal folds were overlooked, and the ventral floor of the gastric chamber to the right of the glandular pad was interpreted as a sorting area.
USNM
Australia
Magnetic Island
-16.883333
South Pacific Ocean
127
145.76167
Cockle Bay
16
601
USNM 828806, USNM 1083479
1