Euthria yesimae Harzhauser & Landau 2024, nov. sp.

Euthria yesimae nov. sp.

Figs 34K, 48A–C

Euthria (Euthria) cornea mut. curvirostris Grateloup — Erünal-Erentöz 1958: 59, pl. 9, figs 8–10 [non Euthria curvirostris (Grateloup, 1845)].

Euthria curvirostris (Grateloup, 1845) — Landau et al. 2013: 165, pl. 25, figs 2, 3, pl. 64, fig. 5, pl. 79, fig. 10 [non Euthria curvirostris (Grateloup, 1845)].

Type material. Holotype: NHMW 1847 /0058/0838, SL: 40.5 mm, MD: 20.1 mm, Pınarlar Yaylası, Akpınar (Turkey), Figs 48A 1 –A 3. Paratypes: NHMW 1847 /0058/0839, SL: 44.1 mm, MD: 21.6 mm, Pınarlar Yaylası, Akpınar (Turkey), Figs 48B 1 –B 2. RGM 777 871, SL: 38.5 mm, MD: 20.3 mm, Lale on Mut road, Figs 48C 1 –C 3. RGM 794 572, Pınarlar Yaylası, Akpınar (Turkey), Fig. 34K.

Type locality. Seyithasan (Turkey).

Type stratum. Silt and clay of the Týrtar Formation.

Age. Middle Miocene, Serravallian.

Etymology. In honor of YeŞim Büyükmeriç (Zonguldak Bülent Ecevit Üniversitesi, Zonguldak, Turkey) for her help during fieldwork in the Karaman Basin.

Diagnosis. Medium-sized, moderately broad fusiform shell with conical spire and smooth, moderately inflated, strongly constricted last whorl, axial and spiral sculpture restricted to first three to four teleoconch whorls, whorl profile changing from weakly convex to moderately convex with shallowly concave subsutural ramp on last spire whorl, aperture with prominent denticle at angulation of columella, siphonal canal moderately long, deflected.

Description. Medium-sized, moderately broad fusiform shell with conical spire, of up to seven teleoconch whorls; apical angle ~56°. Protoconch paucispiral of 1.5 convex whorls; diameter: 1100 μm. Transition to teleoconch marked by weak axial ribs. Early teleoconch whorls weakly convex. First three teleoconch whorls with moderately prominent axial ribs, fading on fourth whorl, overrun by delicate spiral cords, fading on fourth to fifth whorl. Suture narrowly incised. Whorl profile changing on sixth teleoconch whorl by appearance of shallowly concave subsutural ramp and slight swelling on abapical half of whorl, making whorl profile distinctly convex slightly below mid-whorl forming periphery. Last whorl attaining ~70% of total height, with poorly delimited, narrow, slightly concave subsutural area, moderately inflated mid-whorl, strongly constricted at base, smooth except for indistinct, faint, widely spaced spiral cords over base; fasciole slightly swollen with moderately prominent growth lines. Aperture pyriform, moderately wide. Columellar callus adherent. Columella strongly and broadly excavated, angled at transition to siphonal canal, prominent denticle at angulation. Low, broad parietal swelling. Anal canal moderately incised. No anal denticle. Outer lip with thin peristome and variable number of prominent lirae reaching deep within aperture. Siphonal canal deflected to the left, moderately long and wide, weakly recurved, deeply notched. Color pattern under UV light consisting of blotches and flammules of irregular size and disposition.

Discussion. Euthria yesimae nov. sp. was confused by us with Euthria curvirostris (Grateloup, 1845) (Landau et al. 2013). However, E. curvirostris, from the Serravallian of the Aquitanian Basin (France), is slenderer, has a higher spire, a less inflated last whorl, a longer and strongly recurved siphonal canal and prominent spiral sculpture. (see Peyrot 1928: pl. 5, figs 45–46). The Middle Miocene, Paratethyan Euthria odiosa nov. sp. has less convex whorls, a less concave subsutural ramp, a less inflated last whorl and a less constricted base. Euthria depressospira Bandat, 1943 differs in its ovate outline with weak, adpressed suture, higher last whorl and less constricted base. Euthria (Euthria) cornea (Linné) var. curvirostris sensu Symeonidis (1966: 281, pl. 9, figs 6–7), from the Serravallian of Crete, differs in its less convex whorls and less constricted base.

Proto-Mediterranean Sea. Serravallian (Middle Miocene): Karaman Basin: Pınarlar Yaylası, Akpınar, Lale (Turkey) (Landau et al. 2013).