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Perisphinctes (Arisphinctes) kheraensis
Taxonomy
Perisphinctes kheraensis was named by Spath (1931).
It was recombined as Perisphinctes (Arisphinctes) kheraensis by Pandey et al. (2012).
It was recombined as Perisphinctes (Arisphinctes) kheraensis by Pandey et al. (2012).
Sister species lacking formal opinion data
P. africanus, P. andium, P. mairei-matheyi, P. malinowskae, P. panderi, P. polygyratus, P. praestenocyclus, P. progeron, P. quadratus, P. scythicus, P. siemiradzkii, P. eucostatus, P. quadratus, P. pickeringius, P. buckmani, P. buckmanni, P. luciaeformis, P. crassissimus, P. A, P. B, P. anguiculus, P. patturatensis, P. siemirazkii, P. roedereri, P. alatus, P. andelotensis, P. densecostatus, P. pumilus, P. dorsoplanus, P. dacquei, P. polygyratus
Synonymy list
| Year | Name and author |
|---|---|
| 1931 | Perisphinctes kheraensis Spath p. 420 figs. Pl. 74, fig. 5a, b |
| 2012 | Perisphinctes (Arisphinctes) kheraensis Pandey et al. p. 502 |
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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.
†Perisphinctes (Arisphinctes) kheraensis Spath 1931
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D.K. Pandey et al. 2012 | Shells small to large, incomplete, septate till end, and evolute. Inner whorls slightly depressed, outer whorls compressed. Whorl section subrounded, the slightly convex lanks merge smoothly into the moderately arched venter (Fig. 23A-F). Umbilical wall short, steeply inclined. Ornamentation consists of gradually variocostate, moderately coarse, sharp primary ribs originating near the umbilical suture with rursiradiate orientation then turning prorsiradiate near the umbilical margin, from where they run consistently forwardinclined on the lanks. Primaries branch regularly into two (rarely three on the outer whorl) iner secondaries at the ventrolateral region (Fig. 23G) and cross the venter with slight forward-directed convexity. Primaries on outer whorls become rectiradiate. Ribbing density is moderate, increases during growth until a diameter of around 100 mm (Fig. 24). Constrictions distinct, numbering three per whorl. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Kiessling 2003 | |||||
Collections
No collection or age range data are available