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Astralites fimbriatus
Taxonomy
Astralites fimbriatus was named by Whiteaves (1892). Its type specimen is GSC 2069a, a shell, and it is a 3D body fossil. Its type locality is mouth Red Deer River Lake Winnipegosis, which is in a Givetian marine horizon in the Dawson Bay Formation of Canada.
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Astralites fimbriatus Whiteaves 1892
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1941 | Moderately large, trochiform, cryptomphalous gastropods without a sinus in the oblique outer lip and with a digitate and fluted projecting frill at the periphery; whorl profile gently arched between sutures, sharply angulated at the periphery; sutures covered by the frill of the previous whorl; nucleus unknown; base flatly convex on the outer part close to the projecting frill, concave within, the umbilicus plugged by a concave callus; columellar lip not well known in its external aspect but internally with a revolving fold or elongate tooth that extends back from the aperture for about half a whorl where it turns sharply up the columella and becomes obsolete, the groove below the tooth becoming obsolete at the same point; parietal inductura thin or wanting; outer lip rather strongly oblique backwards above the frilled periphery and becoming more so as the periphery is approached, the part of the lip below the periphery offset backwards and with its margin very strongly oblique backwards so as to meet the callus area in a direction tangential to its margin; frill a continuation of the shell of the outer whorl face, strongly digitate and fluted, the extensions convex upward and the re-entrants convex downward, the shell of the lower, basal part of the outer lip applied to the lower half of the frill separately because o f this offset; ornamentation a series o f low, rounded knobs rather widely but evenly spaced on the middle of the outer whorl face crossed by revolving costae that rise at the upper suture and pass gradually lower on the whorl as they progress forward, the costae weakened or interrupted in the lower areas between the knobs; shell seemingly thin, its structure unknown. The holotype measures about 21 mm. in height, 29 mm. in width across the frill, and has a pleural angle of about 65 degrees. |