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Perisphinctes (Dichotomosphinctes) gamelai
Taxonomy
Perisphinctes (Dichotomosphinctes) gamelai was named by Arkell (1947).
Sister species lacking formal opinion data
Dichotomosphinctes decaryi, Dichotomosphinctes martini, Dichotomosphinctes sikilyensis, 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 |
|---|---|
| 1947 | Perisphinctes (Dichotomosphinctes) gamelai Arkell p. 358 figs. Pl. 75, figs. 3-5 |
| 2012 | Perisphinctes (Dichotomosphinctes) gamelai Pandey et al. p. 512 |
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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 (Dichotomosphinctes) gamelai Arkell 1947
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D.K. Pandey et al. 2012 | Shell small, evolute, and almost complete, with at least half the body chamber preserved. Whorl section compressed and suboval (Fig. 38A). Ornamentation consists of very ine to ine, closely but irregularly spaced, prorsiradiate primary ribs, originating near the umbilical margin nearly rursiradiate, turning prorsiradiate just beyond the umbilical margin. Across the lank they run faintly sinuously, branching slightly below the ventrolateral shoulder (Fig. 38B). Occasionally, undivided single primaries cross the venter and end as free secondaries on the other side. The posterior secondary branches off in a slightly backward direction. Secondaries cross the venter with slight forward-directed convexity. Umbilical wall more or less smooth. Constrictions indistinct. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Kiessling 2003, Kiessling 2004 | |||||
Collections
No collection or age range data are available