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Hindella prima
Taxonomy
Hindella prima was named by Popov et al. (2015). Its type specimen is NMW 2012.7G. 336, a valve (ventral valve internal mould), and it is a 3D body fossil. Its type locality is AF7/2, which is in a Katian marine siltstone/sandstone in the Chahgonbad Formation of Iran.
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Hindella prima Popov et al. pp. 418 - 419 figs. 8G, H; 9A–C; 15E |
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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.
†Hindella prima Popov et al. 2015
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. E. Popov et al. 2015 | Shell slightly ventribiconvex, slightly elongate suboval to almost circular in outline 104% (s = 10%, n = 5) with maximum width at mid-length. Anterior commissure rectimarginate. Ventral valve strongly convex about one-third as deep as long with the maximum height slightly posterior to mid-length. Ventral umbo strongly swollen, gently incurved. Dorsal valve almost as long as wide, moderately and evenly convex, about one-fourth as deep as long, umbo inconspicuous. Shell surface smooth except for occasional strong growth marks.
Ventral interior with strong cyrtomatodont teeth supported by strong dental plates slightly divergent anteriorly and terminated slightly anterior to mid-length. Pedicle callist strongly thickened, elongate subtriangular. Ventral muscle field narrow, elongate, triangular, open anteriorly and flanked laterally by the long dental plates. Individual muscle scars and mantle canals not impressed. Dorsal interior with a delicate, disjunct hinge plate not exceeding one-quarter valve maximum width. Septalium narrow and shallow, formed by minute septal plates converged on the low posteriorly thickened median septum extending anteriorly slightly beyond bid-length. Sockets long, narrow, widely divergent. Adductor muscle scars and mantle canal impressions indiscernible. Brachial supports and jugum unknown |