Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Perisphinctes (Dichotomoceras) stenocycloides

Cephalopoda - Ammonitida - Perisphinctidae

Synonymy list
YearName and author
1898Perisphinctes stenocycloides Siemiradzki p. 254 figs. Pl. 20, fig. 11
1959Dichotomosphinctes stenocycloides Collignon pp. Pl. 65 fig. 291
2012Perisphinctes (Dichotomoceras) stenocycloides Pandey et al. p. 525

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
subclassAmmonoidea()
RankNameAuthor
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyPerisphinctoidea(Steinman 1890)
familyPerisphinctidaeSteinmann 1890
subfamilyPerisphinctinaeSteinmann 1890
genusPerisphinctes()
subgenusDichotomoceras
speciesstenocycloides(Siemiradzki 1898)

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.

show all | hide all
Diagnosis
ReferenceDiagnosis
D.K. Pandey et al. 2012Shells moderately large, evolute, compressed. Whorl section suboval with slightly arched lanks merging smoothly into well rounded venter (Fig. 60A-C). Umbilical wall short but distinct, merging with lank at the rounded umbilical margin. Ornamentation consists of prorsiradiate, gradually varicostate, ine to moderately coarse primary ribs originating at the umbilical suture, branching into two secondaries slightly below the ventrolateral region (Fig. 60D, E). Secondaries cross the venter with slight forward-directed convexity. The anterior secondaries show a slightly stronger forward inclination than primaries. Occasionally, secondaries of one primary rib are connected with two adjacent primaries on the other side (“galloping”). Ribbing density is moderate, increasing considerably from diameters of 60 to 120 mm (Fig. 61).