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Jahnia pelmen
Taxonomy
Jahnia pelmen was named by Bogolepova and Kříž (1995) [Jahnia? pelmen]. Its type specimen is SCGM N 974/10, a shell (right valve), and it is a 3D body fossil. Its type locality is Well FT 3, Unit 3, which is in a Rhuddanian marine limestone in the Kochumdek Formation of the Russian Federation.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1995 | Jahnia pelmen Bogolepova and Kříž p. 694 figs. pl. 87 f. 18-20 |
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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.
†Jahnia pelmen Bogolepova and Kříž 1995
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. K. Bogolepova and J. Kříž 1995 | Shell subtriangular, prosocline, obese, inequilateral, inequivalve. Left valve unknown. In right valve, anterior slope steeper than posterior slope. Shell somewhat posteriorly elongated. Large, prominent, prosogyre umbo in almost central position. Inner surface sculpture of almost regularly spaced flat growth bands and furrows, narrowing ventrally. Outer surface sculpture preserved on holotype in umbonal part consisting of well developed sharp regular growth lines. Right valve commissure curved in ventral part laterally toward right valve. Other features unknown. |