Emarginula octaviana Coen, 1939

Sacchetti, Claudia, Landau, Bernard & Ávila, Sérgio P., 2023, The Lower Pliocene marine gastropods of Santa Maria Island, Azores: Taxonomy and palaeobiogeographic implications, Zootaxa 5295 (1), pp. 1-150 : 24

Emarginula octaviana Coen, 1939

Plate 1 B 1 -B 2

Emarginula elongata , Costa 1829: 10 (non Defrance, 1819; non G.B. Sowerby I, 1823; non Gray,1825) .

Emarginula elongata , Costa 1830: 10 (non Defrance, 1819; non G.B. Sowerby I, 1823; non Gray,1825).

Emarginula Ornata Millet 1854: 166 (nomen nudum).

Emarginula ornata Millet 1864: 599 .

* Emarginula octaviana Coen 1939: 71 .

Emarginula elongata da Costa — Glibert 1949: 20, pl.1, fig. 9.

Emarginula elongata Costa, 1829 — Brébion 1964: 58, pl. 1, figs. 7, 8.

Emarginula octaviana Coen, 1939 — Piani 1984: 206, figs. 26-36.

Emarginula octaviana Coen, 1939 — Giannuzzi-Savelli et al. 1994: 46, fig. 77

Emarginula octaviana Coen, 1939 — Chirli & Linse 2011: 32, pl. 3, fig. 3.

Emarginula octaviana Coen, 1939 —Hernández et al. 2011: 59, figs. 9H-J.

Emarginula octaviana Coen, 1939 — Ceulemans et al. 2016a: 57, pl. 2, fig. 3 (cum syn.).

Emarginula octaviana Coen, 1939 — Chirli & Forli 2017: 20, pl. 3, fig. D.

Emarginula octaviana Coen, 1939 — Landau et al. 2017: 86, pl. 9, figs. 1-2.

Santa Maria material examined. Maximum height 1.8 mm, width 3.0 mm. DBUA-F 487-1 (2), Ponta do Castelo, Santa Maria Island, Azores, Touril Complex, Lower Pliocene.

Description. Azorean specimen juvenile, not apt for description.

Discussion. The Azorean specimens represent a juvenile but shows the salient characteristics of the species; the long elongated profile, coarse reticulate sculpture, and most importantly the lamellae on the selenizone, which are relatively coarse and rise above the level of the reticulate sculpture on lateral view. For further comparison, see Ceulemans et al. (2016: 58).

Distribution. Upper Miocene: Atlantic (Tortonian), NW France ( Millet 1854, 1865; Brébion 1964; Landau et al. 2017). Lower Pliocene: Atlantic, NW France ( Brébion 1964; Ceulemans et al. 2016), Santa Maria Island, Azores (this paper). Upper Pliocene-Lower Pleistocene: NW France ( Brébion 1964). Lower Pleistocene: central Mediterranean ( Chirli & Forli 2017); eastern Mediterranean ( Chirli & Linse 2011). Present-day: Atlantic Canaries (Hernández et al. 2011), Portugal, Morocco and Mediterranean ( Poppe & Goto 1992).

Figures

PLATE 1. A. Danilia pterostomus (Bronn, 1861), height 5.0 mm, width 4.0 mm, Forno da Cré (figure taken from Bronn in Hartung, 1861, pl. 19, fig. 2). B1-B2. Emarginula octaviana Coen, 1939, DBUA-F 487-1, height 1.8 mm, diameter 3.0 mm, Ponta do Castelo. C. Bolma cf. rugosa (Linné, 1767), DBUA-F 471-3, diameter 4.1 mm, Ponta do Castelo. D1-D5. Turbo hartungi Bronn 1861, DBUA-F 1295-1, height 9.0 mm, width 8.0 mm, Malbusca (east cave). E1-E3. Nerita cf. funata Dujardin, 1837, DBUA-F 917-1, height 4.0 mm, width 6.0 mm, Ponta do Castelo. F1-F2. Thericium crenulosum (Bronn, 1862), height 10.0 mm, width 6.0 mm, Ponta do Norte lighthouse, LNEG collection (unnumbered). G1-G2. Thericium hartungi (Mayer, 1862), height 29.0 mm, width 13.0 mm, Pinheiros (figure taken from Bronn in Reiss, 1862, pl. 1, fig. 11). H1-H2. Thericium incultum (Mayer, 1862), DBUA-F 1034-2, height 23.0 mm, width 10.0 mm, Macela viewpoint. I1-I2. Thericium incultum (Mayer, 1862), DBUA-F 1027-1, height 29.0 mm, width 11.0 mm, Malbusca II. J1-J2, K1-K2. Bittium miradouroense nov. sp., Holotype DBUAF 1034-5, height 6.8 mm, width 1.9 mm (J); Paratype DBUA-F 1034-6(1), height 5.3 mm, width 1.9 mm (K), Macela viewpoint. L1-L2, M1-M2. Bittium nov. sp., DBUA-F 488-2, height 4.5 mm, width 1.8 mm (L), height 4.2 mm, width 1.7 mm (M), Ponta do Castelo.

PLATE 2. A1-A2. Bittium nanum (Mayer, 1864), DBUA-F 1296-2, height 4.9 mm, width 2.0 mm, Malbusca. B. Tenagodus (Tenagodus) obtusus (Schumacher, 1817), DBUA-F 1283-2, height 12.0 mm, width 11.0 mm, Ponta do Castelo. C. Epitonium sp., DBUA-F 931-1, height 4.0 mm, width 2.8 mm, Pedra-que-pica. D1-D3. Janthina krejcii, SMF10135a, height 25.0 mm, diameter 32.0 mm, Macela viewpoint (pictures from Beu, 2017, fig. 26). E1-E3. Janthina typica (Bronn, 1861), DBUA-F-428, height 19.0 mm, diameter 21.0 mm, Ponta do Castelo, (pictures from Beu, 2017, fig. 25). F.Cheilea equestris (Linnaeus, 1758), DBUA-F 1283-1, diameter 30.0 mm, Ponta do Castelo. G1-G3. Hipponix sulcatus (Borson, 1820), DBUA-F 937-1, height 5.3 mm, diameter 14.0 mm, Ponta do Castelo. H1-H2. Euspira atlantica (Mayer, 1862), height 16.0 mm, diameter 19.0 mm, Ponta do Norte lighthouse, LNEG collection (unnumbered). I. Triphorid s.l., DBUA-F 471-5, height 3.2 mm, width 1.3 mm, Ponta do Castelo. J1-J2. Cerithiopsis cf. tubercularis (Montagu, 1803), DBUA-F 1023-1, height 3.0 mm, width 1.2 mm, Ponta do Castelo. K. Petaloconchus intortus (Lamarck, 1818), DBUA-F 946-2, height 13.0 mm, width 6.0 mm, Ponta dos Cedros. L. Thylacodes arenarius (Linnaeus, 1758), DBUA-F 869-1, height 33.0 mm, width 24.0 mm, Ponta dos Cedros. M1-M3. Alvania cancellata (da Costa, 1778), DBUA-F 1296-3, height 4.0 mm, width 2.2 mm, Malbusca.