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Aegides
Taxonomy
Aegides is a genus. It is not extant. Its type is Aegides seperbes.
It was assigned to Helcionellidae by Missarzhevsky (1989); to Mollusca by Sepkoski (2002); and to Maikhanellidae by Ponder et al. (2007) and Parkhaev and Demidenko (2010).
It was assigned to Helcionellidae by Missarzhevsky (1989); to Mollusca by Sepkoski (2002); and to Maikhanellidae by Ponder et al. (2007) and Parkhaev and Demidenko (2010).
Species
A. ageneris, A. seperbes (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Aegides Missarzhevsky p. 173 |
| 2002 | Aegides Sepkoski |
| 2007 | Aegides Ponder et al. p. 136 |
| 2010 | Aegides Parkhaev and Demidenko p. 1003 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Y. Parkhaev and Y. Demidenko 2010 | "Shell cap-shaped, low conical, moderately elongated. Apex slightly hooked and displaced anteriorly. Posterior field convex in apical area, becoming flattened near aperture. Anterior field straight, sometimes becomes concave due to train formation. Lateral fields flattened or slightly convex. Aperture oval or rounded rectangular, sometimes with flaring anterior part, forming wide train. Shell exterior granular, more distinctly near apertural margin and smoothing out towards apex." |
Measurements
No measurements are available
No ecological data are available
Age range: base of the Meishucunian to the top of the Tommotian or 530.70000 to 521.00000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Nemakit-Daldynian | Russian Federation (Khabarovsk) | A. sp. (99465) | |
| Meishucunian | China (Yunnan) | A. places (108306) | |
| Meishucunian - Tommotian | China (Yunnan) | A. seperbes (96449) | |
| Tommotian | China (Yunnan) | A. seperbes (94556) |