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Porambonites acutiplicatus
Taxonomy
Porambonites acutiplicata was named by Reed (1917). It is a 3D body fossil.
It was corrected as Porambonites acutiplicatus by Candela and Harper (2014).
It was corrected as Porambonites acutiplicatus by Candela and Harper (2014).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Porambonites acutiplicata Reed p. 923 figs. Plate XXII, figs. 10, 11 |
| 1962 | Porambonites acutiplicata Williams p. 230 figs. Pl. XXIII, figs. 35-37 |
| 2014 | Porambonites acutiplicatus 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.
†Porambonites acutiplicatus Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. C. Reed 1917 | Shell subcircular to subelliptical, biconvex, deeply folded; hinge-line less than width of shell; cardinal angles obtuse. Pedicle-valve with very deep sharply angular sinus starting from near beak and rapidly deepening and widening to front margin, bounded by sharp angular edges, and with floor produced into acutely pointed tongue, sharply folded along middle line; beak swollen, rising above hinge-line, incurved (but less so than opposite valve); hinge-area steeply inclined, triangular, with median triangular delthyrium. Brachial valve strongly convex, swollen, and inflated, with high rounded fold corresponding to sinus occupying middle third of valve on anterior margin, which is acutely emarginate; lateral lobes gently convex, not strongly marked off from fold; beak large, high, swollen, incurved, rising above beak of opposite valve, with vertical triangular hinge-area lying in plane of valve. Surface of shell ornamented with small closely set circular pits in radial lines, about ten radial lines to every 4 mm., and about ten pits of a row in every 3 mm. |