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Glyptomena brumalis
Taxonomy
Rafinesquina brumalis was named by Reed (1917). Its type specimen is ??, a shell, and it is a 3D body fossil.
It was recombined as Glyptomena brumalis by Williams (1962) and Candela and Harper (2014).
It was recombined as Glyptomena brumalis by Williams (1962) and Candela and Harper (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1917 | Rafinesquina brumalis Reed p. 870 figs. Plate XII, figs. 21-24 |
| 1962 | Glyptomena brumalis Williams pp. 214 - 215 figs. Pl. XXI, figs. 20-22, 26, 29, 30 |
| 2014 | Glyptomena brumalis 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.
†Glyptomena brumalis Reed 1917
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. C. Reed 1917 | Shell small, semielliptical to subquadrate, sometimes nearly as long as wide, flattened, compressed, plano-convex; hinge-line straight, equal to or slightly less than maximum width of shell; cardinal angles rectangular or slightly obtuse, not produced. Pedicle-valve very gently convex near beak, elsewhere nearly flat; beak small, pointed, acute, rising a little above hinge-line, not incurved. Brachial valve flat or slightly concave; beak inconspicuous, not projecting. Interior of valves unknown. Surface of shell ornamented with about 30 primary equidistant regular thread-like radii, curving back rather strongly on each side of middle line, with a few shorter secondary similar radii; interspaces flat, holding 3-5 very delicate radial lines and crossed by minute close low non-continuous concentric wrinklings and striae. | |
| A. Williams 1962 | Subquadrate to elongately semi-oval and gently piano- to concavo-convex rafinesquinids with the brachial valve almost three-quarters as long as wide, both valves more convex at the umbones, due to persistence of a conspicuous, subcircular protegulum over 0"5 mm. long, and bearing a minute pedicle sheath; radial ornamentation consisting of fine costae with intercalated costellae, about 8 per millimetre at a distance of 3 mm. antero-medianly of the dorsal umbo, segregated into narrow sectors by differentially thickened costae and costellae and tending to curve posteriorly in the lateral areas, radial pattern cancellated by very fine concentric lamellae and corrugated by impersistent, faint and narrow rugae; ventral interior with short, divergent dental lamellae and a small muscle-scar obscurely impressed; cardinal process lobes small and delicate, ankylosed to thin socket ridges lying subparallel to the hinge-line, notothyrial platform not developed. |