Monoplex comptus (A. Adams, 1855)

Plate 4 D 1 -D 2

* Triton comptus A. Adams 1855: 312 .

Tritonium secans Bronn in Reiss 1862: 28, pl, 1, fig.10.

Tritonium secans Bronn — Mayer 1864: 72, pl. 7, fig. 52.

Triton ridleyi E. A. Smith 1890: 489, pl. 30, fig. 1.

Lampusia gracile (Reeve) — Dall 1889: 227, pl. 29, fig. 2 (non Triton gracilis Reeve, 1844 = Triton pfeifferianus Reeve, 1844).

Cymatium comptum (A. Adams, 1855) — Yen 1942: 215, pl. 18, fig. 112.

Cymatium (Septa) gemmatum (Reeve, 1844) — Clench & Turner 1957: 222, pl. 110, fig. 2, pl. 113, fig. 6, pl. 125, fig. 1-2 (non Triton gemmatus Reeve, 1844).

Cymatium (Septa) vespaceum (Lamarck, 1822) — Warmke & Abbott 1961: 101, pl. 18b (non Triton vespaceum Lamarck, 1822) .

Cymatium (Septa) vespaceum (Lamarck, 1822) — Kilias 1973: 193, fig. 139 (non Triton vespaceum Lamarck, 1822).

Cymatium (Septa) vespaceum (Lamarck, 1822) — Abbott 1974: 163, fig. 1754 (non Triton vespaceum Lamarck, 1822).

Cymatium (Septa) vespaceum (Lamarck, 1822) — Rios 1975: 79, pl. 79, fig. 322 (non Triton vespaceum Lamarck, 1822).

Cymatium vespaceum (Lamarck, 1822) — Hinton 1978: 30, fig. 9 (non Triton vespaceum Lamarck, 1822).

Cymatium (Septa) vespaceum (Lamarck, 1822) — Kay 1979: 223, fig. 79E (not 79F) (non Triton vespaceum Lamarck, 1822).

Cymatium (Septa) vespaceum (Lamarck, 1822) — Saunders 1980: 5, upper fig. (non Triton vespaceum Lamarck, 1822).

Cymatium (Septa) vespaceum (Lamarck, 1822) — Coelho et al. 1981: 124, fig. 9 (non Triton vespaceum Lamarck, 1822).

Cymatium vespaceum (Lamarck, 1822) — Garcia-Talavera 1983: 108, pl. 5, fig. 2 (non Triton vespaceum Lamarck, 1822).

Cymatium (Septa) comptum . (A. Adams, 1855)— Rios 1985: 75, pl. 27, fig. 329.

Cymatium (Septa) comptum (A. Adams, 1855) — Springsteen & Leobrera 1986: 113, pl. 31, fig. 3a-b.

Cymatium (Turritriton) comptum (A. Adams, 1855) — Garcia-Talavera 1987: 253, pl. 2, fig. 5.

Cymatium (Turritriton) comptum (A. Adams, 1855) — Lai 1989: 125, fig. 44.

Cymatium (Turritriton) comptum (A. Adams, 1855) — Henning & Hemmen 1993: 99, pl. 21, fig. 5.

Cymatium (Septa) comptum (A. Adams, 1855) — Rios 1994: 89, pl. 29, fig. 345.

Cymatium comptum (A. Adams, 1855) —Kubo, in Kubo & Kurozumi 1995: 75, fig. 9.

Cymatium vespaceum (Lamarck, 1822) — Wellens & Wils 1997: 79, fig. 14 (non Triton vespaceum Lamarck, 1822).

Cymatium (Monoplex) comptum (A. Adams, 1855) — Beu 1998b: 86, fig. 23i, 26a-k.

Cymatium (Monoplex) comptum (A. Adams, 1855) — Beu 1999: 21, fig. 35.

Cymatium (Monoplex) comptum (A. Adams, 1855) — Okutani 2000: 287, pl. 142, fig. 11.

Cymatium (Turritriton) comptum (A. Adams, 1855) — Redfern 2001: 62, pl. 31, fig. 263A, B, pl. 109, fig. 263C.

Cymatium comptum amphiatlanticum (A. Adams, 1855) — Garcia-Talavera & de Vera 2003: 202, fig. 1-5.

Cymatium (Monoplex) comptum (A. Adams, 1855) — Zhang & Ma 2004: 147, text-fig. 91.

Cymatium (Monoplex) comptum (A. Adams, 1855) —Beu & Segers in Poppe 2008: 644, pl. 267, fig. 1, 3, 4, 7, 8.

Monoplex comptus (A. Adams, 1855) — Beu 2010: 149, pl. 36, figs. 10, 14.

Cymatium comptum (A. Adams, 1855) —Hernández et al. 2011: 172, fig. 53L.

Santa Maria material examined. Maximum height 25.0 mm, width 14 mm. Two fragments from Pinheiros, Santa Maria Island, Azores, Touril Complex, Lower Pliocene .

Discussion. Tritonium secans Bronn, 1862 was based on four fragments, two from Pinheiros, one from Feteirinhas (= Ponta das Salinas) and one from Cré. No further material is available, but the figure undoubtedly represents a Monoplex species, which in our opinion is M. comptum (A. Adams, 1855) . The specimen illustrated by Bronn in Reiss (1862: pl, 1, fig.10; refigured pl. 4, fig. 4 D 1) and by Mayer (1864: pl. 7, fig. 52; refigured pl. 4, fig. 4 D 2) is undoubtedly the same specimen, but the illustrator has highlighted the primary spiral cords much more strongly in Mayer’s illustration. For full discussion and comparison with related congeners, see Beu (2010: 149). This species and Aspa marginata (Gmelin, 1791) are the two amphiatlantic species present in the Azorean Pliocene assemblages.

Distribution. Lower Pliocene: eastern Atlantic, Santa Maria Island, Azores (Bronn in Reiss 1862; Mayer 1864). Lower Pleistocene: eastern Atlantic, Moín formation, Costa Rica. Pleistocene or Holocene: Atlantic, Panama; Red Sea, Egypt (NHMW coll.). Present-day: western Atlantic, Bermuda, Carolinian biogeographic province, Gulf of Mexico, Caribbean to Brasil; eastern Atlantic, Canary Islands, Indian Ocean, and Red Sea (all references from Beu 2010).