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Bembexia larteti
Taxonomy
Pleurotomaria larteti was named by Munier-Chalmas (1876). It is not extant. Its type locality is Boix roux quarry, Gahard, Rennes, which is in a Pragian carbonate limestone in the Bois-Roux Formation of France.
It was recombined as Bembexia larteti by Oehlert and Oehlert (1888), Knight (1941), Tassell (1982), Bandel and Frýda (1996), Pan and Cook (2003) and Wagner (2023).
It was recombined as Bembexia larteti by Oehlert and Oehlert (1888), Knight (1941), Tassell (1982), Bandel and Frýda (1996), Pan and Cook (2003) and Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1876 | Pleurotomaria larteti Munier-Chalmas p. 106 |
| 1877 | Pleurotomaria larteti Oehlert p. 585 |
| 1888 | Bembexia larteti Oehlert and Oehlert |
| 1941 | Bembexia larteti Knight pp. 54 - 55 figs. pl. 34 f 2 |
| 1982 | Bembexia larteti Tassell p. 17 |
| 1996 | Bembexia larteti Bandel and Frýda p. 337 |
| 2003 | Bembexia larteti Pan and Cook p. 38 |
| 2023 | Bembexia larteti Wagner p. 4432 |
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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.
†Bembexia larteti Munier-Chalmas 1876
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1941 | Moderately large, turbinate gastropods with a sinus in the outer lip culminating in a slit that gives rise to a peripheral selenizone; whorl profile with an upper surface in some cases only gently arched and in others with a median subangular break, sloping as a whole strongly outward to the carina bordering the upper margin of the selenizone, the selenizone generally concave, sloping slightly inward above and bordered by carinae the lower of which projects slightly beyond the upper and forms the periphery, below the selenizone sloping rather sharply inward to the lower suture just above which there is on some specimens a rounded angulation; base rounded, variably anomphalous or minutely phaneromphalous; sutures sharply angular but not deep; nucleus seemingly smooth, simple, and dextral but insufficiently known; columellar lip sharp, thin, reflected upon itself or about the small umbilicus; parietal lip with a thin inductura which seemingly extended slightly beyond the aperture; outer lip with a rather deep, angular sinus culminating in a slit of less than one-quarter of the whorl circumference in depth, the slit generating a selenizone, the lip on the upper surface sweeping obliquely backward from the upper suture with forward convexity to the selenizone, more sharply backward as the selenizone is approached, below the selenizone with strong forward obliquity for a very short distance, then turning to a slight backward obliquity across the base and becoming almost vertical before entering the umbilicus or meeting the reflexed columella; revolving ornamentation, other than the selenizone with its bordering carinae, a rounded, subangular ridge above the selenizone less than halfway to the upper suture and another rather close below the selenizone slightly above the line of suture, both ridges very strongly developed on the earlier whorls, but often obsolete on the later whorls, tranverse lirae, commonly in the form of fasciculated growth lamellae well developed on the earlier whorls, particularly above and on the upper revolving ridge, but obsolescent, or simply lines of growth on the later whorls; selenizone somewhat variable in form and width, in some examples narrow and concave with stronger bordering carinae, in others wider, more nearly flat, and with less conspicuous carinae, in some specimens with faint revolving striae, lunulae simply arched and rather faint. The largest paratype, a specimen which probably had seven whorls including those of the poorly preserved nucleus, measures about 40 mm. in height and 37 mm. in width with a pleural angle of about 100 degrees. |