Amphicoryna separans (Brady)

Hanagata, S & Nobuhara, T, 2015, Illustrated guide to Pliocene foraminifera from Miyakojima, Ryukyu Island Arc, with comments on biostratigraph, Palaeontologia Electronica (Cambridge, England) 33 (8), pp. 1-142 : 34

publication ID

https://doi.org/ 10.26879/444

persistent identifier

https://treatment.plazi.org/id/A029445F-E900-FFA5-4A1D-B9BE76D1A02E

treatment provided by

Felipe

scientific name

Amphicoryna separans (Brady)
status

 

Amphicoryna separans (Brady)

Figures 12.9-12.11 View FIGURE 12

1884 Nodosaria scalaris var. separans Brady , p. 511, pl. 64, figs. 16—19.

1902 Nodosaria scalaris var. separans Brady — Millett (part XIII), pp. 520, 521, pl. 11, figs. 11, 12.

1913 Nodosaria scalaris (Batsch) — Cushman, p. 58, pl. 24, fig. 7.

1941 Lagenonodosaria scalaris (Batsch) — LeRoy (Part 1), p. 28, pl. 2, figs. 30, 31; LeRoy (Part 2), p. 77, pl. 2, fig. 18.

1944 Lagenonodosaria scalaris (Batsch) — LeRoy (Part 1), p. 21, pl. 8, fig. 12.

1956 Lagenonodosaria separans (Brady) — Asano (a), p. 28, pl. 6, figs. 8, 9.

1964 Lagenonodosaria scalaris (Batsch) — LeRoy, p. F27, pl. 15, figs. 20, 29.

1968 Amphicoryna scalaris (Batsch) — Huang, p. 55, pl. 13, fig. 12.

1988 Amphicoryna scalaris (Batsch) — Wang, Zhang, Zhao, Min, Bian, Zheng, Cheng, and Chen, p. 139, pl. 17, figs. 17, 19; Marle, p. 139, pl. 4, fig. 22.

1989 Amphicoryna scalaris (Batsch) — Ōki, pp. 92, 93, pl. 6, fig. 3.

1990 Amphicoryna scalaris (Batsch) — Akimoto, p. 191, pl. 17, fig, 7.

1992 Amphicoryna scalaris (Batsch) — Hatta and Ujiié (b), p. 166, pl. 21, fig. 8.

1994 Amphicoryna scalaris (Batsch) — Jones, p. 75, pl. 63, figs. 29—31.

1994 Amphicoryna separans (Brady) — Jones, p. 76, pl. 64, figs. 16—19; Loeblich and Tappan, p. 71, pl. 127, figs. 1—18.

1998 Amphicoryna scalaris (Batsch) — Hess, p. 76, pl. 12, fig. 2.

Remarks. This is one of the commoner bathyal species in the waters around Japan. The protruding neck of A. separans is annulated, whereas that of A. scalaris is smooth and elongate; for this reason, previous records of A. scalaris from Japan are in fact A. separans as listed, in part, in the synonymy by Loeblich and Tappan (1994). Separation of chambers is not a prime feature in the identification of this species, irrespective of the specific name. In addition, we here show a broken and separated unilocular specimen to illustrate that such specimens may induce erroneous identification as a unilocular species.

Occurrence. Common in all the formations of the present study.

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