|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Strophomenata - Strophomenida - Hesperomenidae
It was recombined as Leptella grayae by Reed (1917); it was recombined as Anoptambonites grayae by Williams (1962), Mitchell (1977), Cocks (2005), Rasmussen et al. (2012) and Candela and Harper (2014).
|Year||Name and author|
|1883||Leptaena grayae Davidson p. 171 figs. pl. 12, figs 23–25|
|1917||Leptella grayae Reed pp. 873 - 874 figs. Plate XIII, figs. 10-17|
|1962||Anoptambonites grayae Williams p. 171 figs. pl. XVI, figs 11–14, 17.|
|1977||Anoptambonites grayae Mitchell|
|2005||Anoptambonites grayae Cocks|
|2012||Anoptambonites grayae Rasmussen et al. pp. 29 - 30 figs. Plate 6, figures 8–14|
|2014||Anoptambonites grayae 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.
|F. R. C. Reed 1917||Shell transversely subsemicircular to semielliptical or subtriangular, widest along hinge-line; concavo-convex; cardinal angles rather less than right angles or rectangular. Pedicle-valve convex, subcarinate, most elevated along middle line, lateral slopes more or less flattened; beak small, pointed, not incurved; hinge-area triangular, at right angles to plane of valve, with triangular delthyrium. Brachial valve slightly concave; beak inconspicuous; hinge-area very narrow. Interior of pedicle-valve with small stout teeth and short rounded flabelliform divergent diductors about one-fifth the length of valve. Interior of brachial valve with sharp prominent raised concentric ridge, emarginate in middle, situated at about half the length of valve, bounding pair of large saucer-like areas in contact in middle line along thin single or double median ridge joining emargination of concentric ridge in front and here much elevated as a blunt spine; saucer-shaped areas radiately grooved and containing weakly impressed faint flabelliform adductor scars divisible into two contiguous radiating pairs. Surface of shell ornamented with numerous straight low radiating subequal rounded thread-like radii numbering 100-120 on the margin, and increasing in number from the beak by frequent intercalation at irregular distances, some of the radii (primaries) being slightly stronger than the others; all crossed by fine concentric striation.|
|A. Williams 1962||Elongately semi-oval Anoptambonites with a strongly convex pedicle valve almost threequarters as long as wide and over one-third as deep as long; ornamentation finely multicostellate with costellae numbering 4 per millimetre antero-medianly; lophophore platform subquadrate, over two-thirds as long as wide and about two-thirds as long as the brachial valve.|