More than a gut feeling: utility of midgut anatomy in phylogeny of the Cerithioidea (Mollusca: Caenogastropoda) Author Strong, Ellen E. text Zoological Journal of the Linnean Society 2011 2011-01-21 162 3 585 630 http://dx.doi.org/10.1111/j.1096-3642.2010.00687.x journal article 10.1111/j.1096-3642.2010.00687.x 0024-4082 5440617 ITTIBITTIUM PARCUM (GOULD, 1861) Material examined North Pacific Ocean : USA : Hawaii : Oahu Island : University of Hawaii , Pacific Biomedical Marine Lab ( USNM 857100 ) . Description Marginal fold S-shaped ( Fig. 4E ), curving well past posterior end of sorting area; oesophageal aperture at apex of marginal fold recurved segment; sorting area curving, tapering posteriorly to pointed tip; left margin of sorting area with slight bulge; sorting area pad, anterior flap, crescentic pads, and accessory marginal fold lacking; glandular pad forming small, rounded mound projecting short distance posteriorly behind gastric shield; single digestive gland duct opening at left of glandular pad; crescentic ridge forming small diverticulum from right posterior end of glandular pad, with proximal tip well behind digestive gland duct; accessory pads, caecum, and caecal folds lacking; U-shaped fold present below lip of stylesac aperture; typhlosoles unfused.