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Primovula (Diminovula) bimaculata
Taxonomy
Amphiperas bimaculata was named by Adams (1854) [m. kosnik taxon no: 9775]. It is extant. Its type specimen is BMNH 1961146, a shell.
It was recombined as Ovula bimaculata by Weinkauff (1881); it was recombined as Pseudosimnia (Diminovula) bimaculata by Schilder (1941); it was recombined as Primovula (Diminovula) bimaculata by Allan (1956); it was recombined as Margovula bimaculata by Cate (1973), Wilson (1993), Jensen (1996).
It was recombined as Ovula bimaculata by Weinkauff (1881); it was recombined as Pseudosimnia (Diminovula) bimaculata by Schilder (1941); it was recombined as Primovula (Diminovula) bimaculata by Allan (1956); it was recombined as Margovula bimaculata by Cate (1973), Wilson (1993), Jensen (1996).
Synonymy list
| Year | Name and author |
|---|---|
| 1854 | Amphiperas bimaculata Adams p. 131 |
| 1881 | Ovula bimaculata Weinkauff p. 176 figs. pl. 46, figs. 1, 4 |
| 1941 | Pseudosimnia (Diminovula) bimaculata Schilder p. 107 |
| 1956 | Primovula (Diminovula) bimaculata Allan p. 123 |
| 1973 | Margovula bimaculata Cate p. 18 fig. 30 |
| 1993 | Margovula bimaculata Wilson p. 201 |
| 1996 | Margovula bimaculata Jensen p. 21 |
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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.
Primovula (Diminovula) bimaculata Adams 1854
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. N. Cate 1973 | Shell lightweight in form; shell color pale grey dorsally, with clouded, irregularly dispersed, sub-banded (though uniformly patterned) pale brown areas superimposed thereon; despite dorsal striation surface is sub-glossy; there is bright orange color within the terminal channels; outer lip, margins, terminal collars, teeth, funiculum, pale ivory; aperture fairly broad; anterior terminal ridge straight, well formed; outer lip thickened, shouldered above, with numerous (34) well defined denticles within; columella barely depressed, with fossula scarcely excavated and carinate within adaxially; base narrowly, convexly ovate, becoming narrow and sub-pointed in front, with a long, narrowly thickened, crenate funicular projection at the rear, which forms the left wall of the adapical canal. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||
Collections
No collection or age range data are available