Acteocina lajonkaireana (Basterot, 1825)

Frolov, Pavel D., Danukalova, Guzel A. & Osipova, Eugenia M., 2018, Late Miocene molluscs of the Morskaya 2 site (Azov Sea region, Russia), Palaeontologia Electronica (a 20) 23 (1), pp. 1-32 : 11

publication ID

https://doi.org/ 10.26879/936

persistent identifier

https://treatment.plazi.org/id/03B287EF-FFF1-3200-D9B5-FABA44F58465

treatment provided by

Felipe

scientific name

Acteocina lajonkaireana (Basterot, 1825)
status

 

Acteocina lajonkaireana (Basterot, 1825) View in CoL

Figure 4.1 View FIGURE 4 , Figure 7.7 View FIGURE 7

1825 Bulla lajonkaireana Basterot , p. 22, pl. 1, fig. 25.

1856 Bulla lajonkaireana Basterot ; Hörnes, partim, p. 624, pl. 50, figs. 9c-9d.

1911-1928 Tornatina lajonkaireana (Basterot) ; Friedberg, p. 542, pl. 35, fig. 16.

1935 Bulla lajonkaireana Basterot ; Kolesnikov, p. 285-286, pl. 33, figs. 1-4.

1936 Tornatina lajonkaireana (Basterot) ; Zhizhchenko, p. 266, pl. 25, figs. 15-18, 27-30, pl. 26, figs. 3, 4.

1953 Acteocina lajonkaireana lajonkaireana (Basterot) ; Berger, p. 104, pl. 17, figs. 54- 61.

1976 Acteocina lajonkaireana (Basterot) ; Iljina, Nevesskaya and Paramonova, p. 276, pl.

28, figs. 22-24.

1987 Acteocina lajonkaireana (Basterot) ; Yanakevich, p. 96, pl. 7, figs. 17, 18.

1993 Acteocina lajonkaireana (Basterot) ; Iljina, p. 122, pl. 15, figs. 11-14.

Material. 12 specimens from layer 1 and 46 specimens from layer 3.

Description. Oval-cylindrical shell with a pointed spire (usually HS is up to 7 mm; WS is up to 3.5 mm), may be slightly larger (WS/HS is 0.5), consists of 4.5 whorls separated by a horizontal moderately deep suture. Protoconch is heterostrophic. Spire has a wide conical form; whorls are slightly convex. There is a well-defined groove in front of the suture on 1.5-2 last whorls. The last whorl is rounded, about 0.9 of the total shell height (HLW/ HS). Aperture is slit-shaped, widens to the bottom part and becomes rounded; HA/HS is 0.85. The aperture outer edge is thin; the inner one is tightly adjacent to the whorl, forming a well-visible thickening. The shell surface is smooth; growth lines are visible.

Remarks. Samples from layer 3 are represented mainly by internal casts.

Region of distribution and age. Early Miocene. Europe, North Caucasus, Transcaucasia (Iljina, 1993).

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