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Anechophragma alexandrae
Taxonomy
Ujukella alexandrae was named by Andreev (1993). Its type specimen is PIN 4461/2a, a valve (exterior of ventral valve), and it is a 3D body fossil. Its type locality is Uyuk River, Tuva, which is in a Llanvirn carbonate horizon in the Tarlikskaya Formation of the Russian Federation.
It was recombined as Anechophragma alexandrae by Madison (2013).
It was recombined as Anechophragma alexandrae by Madison (2013).
Synonyms
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Synonymy list
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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.
†Anechophragma alexandrae Andreev 1993
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Invalid names: Ujukella minima Andreev 1993 [synonym]
Diagnosis
Reference | Diagnosis | |
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E. Egerquist 1999 | Shell concavo-convex, with maximum width along the cardinal margin, cardinal angles drawn out into pointed alae. Radial ornamentation equally parvicostellate with two diverging accentuated costae. A convex pseudodeltidium covers main part of the delthyrial aperture. Ventral interior with median ridge anterior to the muscle field and a medianly divided peripheral rim. Dorsal interior with low lophophore platform surrounded by a rim; the bema is anteriorly elevated on two submedian septa. Socket plates fused with simple, undercut cardinal process. |