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Perisphinctes (Liosphinctes) plicatilis
Taxonomy
Ammonites plicatilis was named by Sowerby (1817).
It was recombined as Perisphinctes plicatilis by Waagen (1875); it was recombined as Perisphinctes (Kranaosphinctes) plicatilis by Schlegelmilch (1994); it was recombined as Arisphinctes plicatilis by Guo et al. (2011); it was recombined as Perisphinctes (Liosphinctes) plicatilis by Pandey et al. (2012).
It was recombined as Perisphinctes plicatilis by Waagen (1875); it was recombined as Perisphinctes (Kranaosphinctes) plicatilis by Schlegelmilch (1994); it was recombined as Arisphinctes plicatilis by Guo et al. (2011); it was recombined as Perisphinctes (Liosphinctes) plicatilis 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 |
|---|---|
| 1817 | Ammonites plicatilis Sowerby p. 149 fig. 166 |
| 1875 | Perisphinctes plicatilis Waagen p. 183 |
| 1994 | Perisphinctes (Kranaosphinctes) plicatilis Schlegelmilch p. 59 figs. Pl 18, fig 2 |
| 2011 | Arisphinctes plicatilis Guo et al. |
| 2012 | Perisphinctes (Liosphinctes) plicatilis Pandey et al. p. 508 |
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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 (Liosphinctes) plicatilis Sowerby 1817
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D.K. Pandey et al. 2012 | Shells small to large, incomplete, septate till end, evolute. Inner whorls depressed, but becoming compressed around 40 mm of shell diameter. Whorl section quadrate in inner whorls, oval in outer whorls with convex to lat lanks merging smoothly into the obtusely rounded venter (Fig. 33A-G). Maximum inlation near umbilical margin. Ornamentation consists of gradually varicostate, very ine to ine, closely spaced (Fig. 34), prorsiradiate primary ribs originating either at the umbilical suture or near the umbilical margin in a rursiradiate fashion to turn prorsiradiate on the lank. Primaries branch into two secondaries at the ventrolateral shoulder on inner whorls and at slightly above or around mid-lateral height on outer whorls. Secondaries cross the venter with slightly forward-directed convexity. Umbilical wall distinct, gradually merging with lanks at the rounded umbilical margin. Constrictions present, numbering at least three per whorl. |