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Plectambonites etheridgei
Taxonomy
Leptaena etheridgei was named by Davidson (1883) [Leptaena Etheridgei].
It was recombined as Plectambonites etheridgei by Reed (1917); it was recombined as Bilobia etheridgei by Williams (1962), Mitchell (1977) and Candela and Harper (2014).
It was recombined as Plectambonites etheridgei by Reed (1917); it was recombined as Bilobia etheridgei by Williams (1962), Mitchell (1977) and Candela and Harper (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1883 | Leptaena etheridgei Davidson p. 170 figs. pl. xii, figs. 11, 12 |
| 1917 | Plectambonites etheridgei Reed pp. 875 - 876 figs. Plate XIII, figs. 27-31 |
| 1962 | Bilobia etheridgei Williams p. 168 figs. PI. XV, figs. 30, 31, 33-36 |
| 1977 | Bilobia etheridgei Mitchell |
| 2014 | Bilobia etheridgei 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.
†Plectambonites etheridgei Davidson 1883
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Williams 1962 | Elongately semi-oval Bilobia, two-thirds as long as wide and strongly concavo-convex with the pedicle valve just over one-half as deep as long; ornamentation differentially parvicostellate with a sublateral pair of costae especially conspicuous, concentric lamellae excessively developed anteriorly; ventral muscle-scar about one-third as long as the pedicle valve and nearly four-fifths as long as wide; lophophore platform not well known, but undoubtedly elongately bilobed with a median septum lying in the cleft, and commonly with rounded frontal margins. |