Turritella turris de Basterot, 1825

Thivaiou, Danae, Harzhauser, Mathias & Koskeridou, Efterpi, 2019, Early Miocene Gastropods from the Felli Section (Proto-Mediterranean Sea NW Greece), Geodiversitas 41 (8), pp. 323-366 : 336

Turritella turris de Basterot, 1825

(Fig. 4 H1-H4)

Turritella turris Basterot, 1825: 29 , pl. 1, fig. 11. — D’Orbigny 1852: 42, no. 430, 32. — Cossmann & Peyrot 1922: 39, pl. 1, fig. 25, pl. 11, figs 21-24. — Lozouet et al. 2001: 29, pl. 7, figs 1a-b.

Turritella (Turritella) turris – İslamoğlu 2004: 143, pl. 1, fig. 4.

MATERIAL EXAMINED. — Sample F10: AMPG ( IV) 2400-2403 (four specimens); sample F11: AMPG ( IV) 2404-2422 (19 specimens) ; sample F12: AMPG ( IV) 2423-2434 (12 specimens) .

DIMENSIONS. — Maximum height: 11 mm (incomplete); maximum width: 5 mm.

DISTRIBUTION. — Early Miocene. Aquitanian. NE Atlantic: France ( Cossmann & Peyrot 1922; Lozouet et al. 2001); Proto-Mediterranean Sea: Greece (this paper). — Burdigalian. NE Atlantic: France ( Cossmann & Peyrot 1922); Proto-Mediterranean Sea: Turkey ( İslamoğlu 2004) (Burdigalian).

Late Miocene-Pliocene. Eastern Mediterranean Sea: Greece ( Koskeridou 1997).

DESCRIPTION

Protoconch smooth, 250 µm in diameter.Transition to protoconch marked by the beginning of teleoconch sculpture. Teleoconch sculpture consisting of three equidistant spiral cords, with cord two being more prominent. Finer cords develop from whorl four and on, below the adapical suture, between the cords and below cord three. Microsculpture consists of very fine irregularly spaced threads between all cords. Apical angle of about 30°. Aperture missing.

REMARKS

The specimens are conspecific with Turritella turris of the type-region of the Aquitanian (Aquitaine, France). There is little variation in the convexity of the whorls; most convex whorls bear more prominent sculpture and are more angular. There is also some variation in the microsculpture with the spiral threads also becoming more prominent.

Turritellids are suspension feeders partially borrowed in the sand ( Allmon 2011).

Figures

FIG. 4. — A1-A3, Bittium larrieyense Vignal, 1911: A1, AMPG(IV) 1891 (SEM image); A2, A3, AMPG(IV) 1646; B1-B3, Granulolabium plicatum (Bruguière, 1792): B1, AMPG(IV) 2089 (SEM image); B2, B3, AMPG(IV) 2167; C1-C3, Gibborissoia varicosa (de Basterot, 1825): C1, AMPG(IV) 2239 (SEM image); C2, C3, AMPG(IV) 2240; D, Mesohalina margaritacea (Brocchi, 1814), AMPG(IV) 2294 (SEM image); E1-E3, Terebralia lignitarum (Eichwald, 1830), AMPG(IV) 2304; F1-F3, Terebralia subcorrugata d’Orbigny, 1852, AMPG(IV) 2306; G1-G4, Finella perpusilla (Grateloup, 1827): G1, G2, AMPG(IV) 2308; G3, AMPG(IV) 2309 (SEM image); G4, AMPG(IV) 2309, protoconch (SEM image); H1-H4, Turritella turris de Basterot,1825:H1, H2, AMPG(IV) 2404;H3, AMPG(IV) 2405 (SEM image); H4, AMPG(IV) 2405, protoconch (SEM image). Scale bars: A1, C2, C3, G1, G2, H1-H3, 500 µm; A2, A3, D, 1 mm; B1, G3, C1, 400 µm; B2, B3, 5 mm; E1-E3, 10 mm; F1-F3, 2 mm; G4, H4, 200 µm.