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Pectenospira
Taxonomy
Pectenospira was named by Popov et al. (1999). It is not extant. Its type is Pectenospira pectenata. It is the type genus of Pectenospirinae.
It was assigned to Pectenospirinae by Popov et al. (1999); and to Spirigerininae by Williams et al. (2002).
It was assigned to Pectenospirinae by Popov et al. (1999); and to Spirigerininae by Williams et al. (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1999 | Pectenospira Popov et al. p. 648 |
| 2002 | Pectenospira Williams et al. p. 1432 |
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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.
G. †Pectenospira Popov et al. 1999
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†Pectenospira minima Severgina 1972
†Pectenospira pectenata Popov et al. 1999
†Pectenospira tetraplicata Fu 1982
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L.E. Popov et al. 1999 | Protozygide with ventribiconvex, acuminate shell and parasulcate anterior commissure; ventral valve moderately convex with an acute, posteriorly directed beak; sharp ventral sulcus originating near the umbo and bounded by strong, angular ribs; dorsal valve gently convex with narrow, rounded median fold originating at the umbo and bounded by sharp angular plications; sulcus and fold smooth, flanks coarsely costate; ventral interior with teeth and fine dental plates; dorsal interior with disjunct hinge plates and short, subparallel, anterodorsally directed crura; spiralia with two whorls and with apices directed internally to the plane of symmetry; jugal processes thick, disjunct, situated centrodorsally. |