Ena dazimonensis, Hausdorf, 2001

Hausdorf, B, 2001, The genus Ena in Turkey, with remarks on its phylogenetic relationships (Gastropoda: Buliminidae), Journal of Natural History 35, pp. 1627-1638 : 1635-1636

Ena dazimonensis , sp. n.

(gures 4, 7, 10, 13)

Bulimus (Petraeus) nogelli [sic]: N ägele, 1894: 106 [non R oth, 1850].

Ena (Ena) nogelli [sic]: Forcart, 1940: 129 [partim, non R oth, 1850], pl. 1 gure 4.

Shell (gure 4). Elongated oval; with 8–9.25 very slightly in ated whorls; moderately thick-walled; teleoconch almost smooth, with only irregular, ne growth ridges; brownish corneous; subtranslucent; the body whorl does not ascend towards the aperture; aperture oval, edentate; peristome slightly expanded, re exed and distinctly thickened on the inside; the thickening of the peristome gets abruptly weaker in the sinulus; palatal insertion of the peristome connected with the columellar edge by a thin callus; rimate or umbilicus open.

Measurements. Tokat (n 530): D: 5.6–6.7 mm, mean 56.1 Ô 0.3 mm; H: 18.2–22.6 mm, mean 520.1 Ô 1.0 mm; D /H: 0.265 –0.346, mean 50.307 Ô 0.020.

Genitalia (gures 7, 10). The penial appendix inserts at the distal section of the penis. There is neither a marked boundary between the appendix sections A and 1

A nor between the sections A, A and A. The appendix retractor inserts at the 2 3 4 5

proximal section of the extraordinarily long section A. The penial retractor inserts 1

at the proximal section of the penis. Both retractors insert close to each other at the diaphragm. There is a horseshoe-shaped ridge with ends which bend inwards in the proximal section of the penis. There is a small, conical hump, which is probably a rudiment of the penial papilla, in the middle of the horseshoe-shaped structure. There is a heel-shaped caecum at the middle section of the very long epiphallus. The agellum is very short. The vagina is more than half as long as the penis. The free oviduct is four times as long as the vagina. The diverticulum of the bursa copulatrix is more than twice as long as the bursa and its duct proximally of the branching point. Remarks. Ena dazimonensis diOEers from Ena nogellii (Roth) and Ena menkhorsti Hausdorf and Bank , sp. n. in the almost smooth shell which has on average more whorls that are hardly in ated, and by the distinctly thickened peristome. The genitalia of Ena dazimonensi s are especially characterized by the heel-shaped epiphallial caecum, the very short agellum and the inner structures of the penis, especially the horseshoe-shaped ridge and the rudimentary penial papilla.

The inner structure of the penis of Ena dazimonensis resembles that of Pseudonapaeu s chodschendicu s Schileyko, 1978.

Etymology. The species is named after the ancient village Dazimon (the modern Tokat), the type locality of the species.

Type locality. V. Tokat: Tokat, rocks above the cemetery, BE96 .

Distribution and material (gure 13). Ena dazimonensis is known only from the surroundings of Tokat.

V. Tokat: Tokat, BE96 (det. anat.; holotype ZMH 2807, leg. B. Hausdorf, 5 October 1987, measurements: D 56.1 mm, H 520.4 mm; H AU; N M B 4480d; SM F 14486, 63751, 104386, 104387, 104388, 202962, 237583, specimens to Nägele, 1894 and Forcart, 1940; ZM H 2808); 3.5 km S of Tokat, BE96 (HAU); 5 km S of Tokat, BE96 (M EN).