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Agniesella aratula
Taxonomy
Pleurotomaria (Pleuroderma) aratula was named by Perner (1907). It is a 3D body fossil. Its type locality is Area between the villages of Měňany and Koněprusy, which is in a Pragian marine horizon in the Praha Formation of the Czech Republic.
It was recombined as Agniesella aratula by Cossmann (1909), Knight (1941) and Wagner (2023).
It was recombined as Agniesella aratula by Cossmann (1909), Knight (1941) and Wagner (2023).
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.
†Agniesella aratula Perner 1907
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1941 | Rather low-spired, trochiform gastropods with a shallow sinus in the outer lip that culminates at mid-whorl in a shallow slit that gives rise to a selenizone; whorl profile gently arched between sutures, strongly rounded at the periphery of the final whorl; sutures shallow; base gently rounded, rather widely phaneromphalous, a thin wash of callus within the umbilicus; nucleus unknown; columellar lip not well known but seemingly bending strongly toward the umbilicus in its upper part and then curving downward and sharply outward with a long oblique slope; parietal inductura seemingly thin or wanting; outer lip oblique backwards from the upper suture and with a shallow sinus just above the periphery culminating in a short slit which gives rise to a selenizone, the margin of the lip passing obliquely backwards from the upper suture to the selenizone with only gentle forward convexity, below the selenizone on the periphery passing obliquely forwards for a very short distance and then turning sharply to a strong backward obliquity continuing with slight forward concavity to the umbilicus; the selenizone gently arched, with faint, crowded lunulae and one or more revolving lirae; ornamentation on upper surface of earlier whorls strong revolving costae with interspaces of about equal width, the costae, but not the interspaces, widening as the shell grows until on the mature whorls the costae are broad and flat, a single narrow secondary costa intercalated between the primary costae on the final, mature whorl, on the lower surface strong, wide, flat, revolving costae of one grade only with narrow interspaces, rather strong, irregular lines of growth; shell rather thin, its structure unknown; a paratype measures about 23 mm. in height, 32 mm. in width, and has a pleural angle of about 105°. |
Measurements
No measurements are available
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| Source: superf = superfamily, c = class | |||||
| References: Bambach et al. 2007, Kiessling 2004 | |||||