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.