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Amphelissa isisensis
Taxonomy
Amphelissa isisensis was named by Etheridge (1921). It is not extant.
It was recombined as Euomphalus isisensis by Tassell (1978).
It was recombined as Euomphalus isisensis by Tassell (1978).
Synonymy list
| Year | Name and author |
|---|---|
| 1921 | Amphelissa isisensis Etheridge |
| 1921 | Amphelissa isisensis Etheridge, Jr. |
| 1941 | Amphelissa isisensis Knight pp. 144 - 145 figs. pl. 75 f. 2 |
| 1959 | Amphelissa isisensis Heidecker p. 6 |
| 1978 | Euomphalus isisensis Tassell p. 23 |
| 1997 | Amphelissa isisensis Cook p. 53 figs. f. 2 a-e |
| 2023 | Amphelissa isisensis Wagner p. 3048 |
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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.
†Amphelissa isisensis Etheridge, Jr. 1921
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1941 | Rather large, probably widely phaneromphalous, discoidal gastropods with a sharply angular juncture of the upper and outer whorl faces; whorl profile sloping rather strongly upward and outward from the upper suture to the crest of the angulation which is said to be “ narrowly truncate horizontally, but there is no evidence to liken this to a slit band” , passing downward from the angulation across the outer whorl face with a well-marked outward component, seemingly turning roundly into the base; sutures said to be rather deep; nucleus unknown, but inner whorls said to be “ nearly flat and coiled in one plane” perhaps due to pressure; base seemingly rounded, seemingly with a single revolving costa, and seemingly rather widely phaneromphalous but said to be “ flat and non-telescopic” ; apertural margins unknown; ornamentation and shell characters unknown. The holotype seemingly has a width (diameter) of about 52 mm. |
Measurements
No measurements are available
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| Source: f = family, superf = superfamily, c = class | |||||
| References: Kiessling 2004, Hendy 2009, Bambach et al. 2007 | |||||
Collections
No collection or age range data are available