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Bilobia etheridgei acuta
Taxonomy
Bilobia etheridgei acuta was named by Williams (1962). Its type specimen is BB.15576, a valve (Internal and external mould of pedicle valve), and it is a 3D body fossil.
Synonymy list
Year | Name and author |
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1962 | Bilobia etheridgei acuta Williams pp. 168 - 169 figs. Pl. XVI, figs. 3-7 |
2014 | Bilobia etheridgei acuta Candela and Harper pp. Supplement 1 |
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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.
†Bilobia etheridgei acuta Williams 1962
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Diagnosis
Reference | Diagnosis | |
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A. Williams 1962 | Elongately semi-oval Bilobia, over three-quarters as long as wide and strongly concavo. convex with the pedicle valve just over one-half as deep as long; ornamentation differentially parvicostellate and only a few excessively developed lamellae anteriorly; ventral muscle-scar less than one-third as long as the pedicle valve and just over three-quarters as long as wide; lophophore platform elongately bilobed, over two-thirds as long as the brachial valve, with a small median septum lying in the cleft and rather pointed frontal margins ankylosed to a pair of conspicuous and slightly divergent ridges on the floor of the valve. |