Species / Struthiolarella Mcmurdoensis
Stromboidea
Original description of Struthiolarella mcmurdoensis by Stilwell, 2000
- "Shell medium-sized for genus (about 30 mm in height for adults), moderately thick, with moderately elevated spire of 5½ subquadrate, somewhat angled to very slightly convex whorls; spire angle variable from about 60-70°; protoconch broadly and obtusely conical, paucispiral, mammillate, of 2-2½ smooth whorls; suture slightly impressed; whorl inflation rapid; last whorl moderately to greatly inflated, biangulate, ornamented with 12-14 collabrally inclined, rounded, moderately protruding and strong tubercles, extremely weak spiral threads (about 2 threads per mm), and very strong Anarctodarwinella-like sinuous growth lines that increase in strength at onset of cessation of growth in gerontic individuals; adapical portion of sutural ramp short, slightly concave; adapertural angulation blunt and somewhat inflated; basal constriction short, rapid; spire whorls with about 12 tubercles situated at center of whorl marking a strong angulation; some tubercles dissected by sinuous growth lines that have a moderately deep posterior sinus angle (PSA) of about 30-35°; fasciole moderately developed, characterized by strong peribasal ridge; aperture moderately large, peristome sublenticular in outline; siphonal canal shallow, short; columella moderately short, distinctly concave; callus pad on labium relatively narrow, but thickened; outer lip slightly projecting as blunt wing."
Locus typicus: McMurdo Sound, Ross sea, Southern Ocean, Antarctica
Stratum typicum: Eocene
Geographic distribution: McMurdo Sound, Ross sea, Southern Ocean, Antarctica
Etymology: Species named for its sole known presence in McMurdo Sound
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