Rhabdoena gostelii, Gümüş & Neubert, 2012

Guemues, Burcin Askim & Neubert, Eike, 2012, New taxa of terrestrial molluscs from Turkey (Gastropoda, Pristilomatidae, Enidae, Hygromiidae, Helicidae), ZooKeys 171, pp. 17-37 : 24

Rhabdoena gostelii sp. n. Fig. 21

Type specimens.

Holotype NMBE 33331, Vil. Erzincan, Kemaliye, Dilli Deresi, 39.315°N, 38.44°E, 870 m alt.,10.7.2005, leg. B. A. Gümüş; paratype NMBE 33332/1, Vil. Erzincan, Kemaliye, Muşaga village (= Kocaçimen 39.296°N, 38.54°E), 02.08.1987, leg. N. Kazancı, ex coll. Neubert.

Diagnosis.

Shell large, protoconch dome-shaped, sculpture of fine irregularly arranged riblets, apertural rims slightly inclined, connected by a weak parietal callus.

Description.

Shell large; protoconch of 2.5 whorls, smooth, dome-shaped; shell colour basically creamy whitish, with a few irregularly scattered brownish mottles; shell elongate conical with a semi-ovate aperture; whorls of the teleoconch almost flat, increasing regularly, suture of medium depth; surface of the teleoconch almost smooth, with a sculpture of fine irregularly arranged riblets on the teleoconch; apertural rims sharp, reinforced by a very weak labial callus, somewhat reflected; a shallow angularis indicated on the parietum, apertural rims slightly inclined, connected by a weak parietal callus; columellar rim of the aperture widely reflected; umbilicus slit-like open, elongate.

Measurements.

Holotype: H = 20.96; D = 8.56; PH = 7.14; PD = 5.4; W = 8.5.

Etymology.

This new species is dedicated to our dear friend, the late Dr. Margret Gosteli from the Natural History Museum Berne, Switzerland.

Distribution.

This species is only known from a very small range in the area of Kemaliye.

Remarks and differential diagnosis.

This new species is currently confined to Rhabdoena because of the overlap of conchological characters with other species of this subgenus. The new species differs from all other known species by its size (it is the largest species in the subgenus). The conchologically closest taxon is Rhabdoena cosensis (Reeve, 1849) ( Fig. 23 ), which has a more conical shell, a more mammillate protoconch, a more open umbilicus, and a much smaller last whorl. The other Turkish species, Rhabdoena armenica ( Nägele, 1903) ( Fig. 22 ), is much smaller, has a widely open umbilicus, and a more rigid mode of ribbing. The latter species is known from two lots in the collection of SMF only, and has not been found back until now. The second lot in SMF (not illustrated here) is said to originate from Tokat (coll. Nägele). Probably, this species is a local endemic species with a restricted distribution area like Rhabdoena gostelii sp. n.

Figures

Figures 13 - 23. Enidae. 13 - 20 Euchondrus spp. 13 Euchondrus septemdentatus, syntype Pupa septemdentata, SMF 236888, Israel, Jerusalem, coll. Rossmaessler ex Roth, Original figure from Iconographie (1), No. 922, H = 9.75 mm 14 lectotype Bulimus triticeus (type designation herewith based on an unpublished designation by Zilch), SMF 236889, Israel, Jerusalem, coll. Rossmaessler ex Stentz, H = 9.4 mm 15 Euchondrus septemdentatus, NMBE 503001, Lebanon, Beirut, next to Soha water plant, 33 ° 45.117 ' N, 35 ° 45.213 ' E, 1474 m alt., 17.08.2008, leg. E. Neubert, H = 9.4 mm 16 syntype Chondrus septemdentatus var. borealis, ZMZ 514110, Turkey, between Mersin and Tarsus, coll. Mousson ex Schlaefli, 1861, H = 10.5 mm; 17 Euchondrus septemdentatus, SMF 312409, Turkey, 2.5 km SE Belen, leg. Menkhorst 18 Euchondrus paucidentatus sp. n., holotype NMBE 32688, Turkey, Vil. Sanliurfa, Nusaybin, bridge over the Cag Cag Deresi, 37.09 ° N, 41.215 ° E, 470 m alt., 4.8.1988, leg. E. Neubert, H = 7.76 mm 19 Euchondrus ledereri, SMF 312412, Turkey, Mesindagi Gecidi, 15 rkm SE Eruh (= Dih), along the road to Sirnak, 37.672 ° N, 42.316 ° E, 1620 m alt., 03.08.1988, leg. Neubert, H = 10.2 mm 20 Euchondrus ledereri, NMBE 503488, Lebanon, Nahr Abu Ali close to Seraad, 34.283 ° N, 35.9288 ° E, 573 m alt., 19.08.2008, leg. Neubert, H = 8.32 mm 21 - 23 Rhabdoena spp. 21 Rhabdoena gostelii sp. n., holotype NMBE 33331, Vil. Erzincan, Kemaliye, Dilli Deresi, 39.315 ° N, 38.44 ° E, 870 m alt., 10.7.2005, leg. B. A. Guemues, H = 20.96 mm 22 Rhabdoena armenica, lectotype SMF 63431, " NW Armenia (?) ", coll. Naegele ex Tembe, H = 14.6 mm 23 Rhabdoena cosensis, lectotype Buliminus (Zebrina) caesius O. Boettger, 1885, SMF 14485, Turkey, " Smyrna " [= Izmir], coll. O. Boettger ex Goldfuss, H = 17.9 mm. -- All figures scaled x 5.