Cochlostoma (Lovcenia) jakschae Zallot, Fehér & Gittenberger, 2018

Zallot, Enrico, Fehér, Zoltán, Bamberger, Sonja & Gittenberger, Edmund, 2018, Cochlostoma revised: the subgenus Lovcenia Zallot et al., 2015 (Caenogastropoda, Cochlostomatidae), European Journal of Taxonomy 464, pp. 1-25 : 19-20

Cochlostoma (Lovcenia) jakschae Zallot, Fehér & Gittenberger sp. nov.

urn:lsid:zoobank.org:act:BBA8F11F-4FAD-4049-A685-1C2CBF95B5E2

Figs 5D , 6D 1–D 2 , 11

Diagnosis

The smallest species of Cochlostoma (Lovcenia) , differing from both C. (L.) dalmatinum and C. (L.) lanatum sp. nov. by the more regular, narrowly spaced, rather prominent ribs. The apertural lip is narrower and less conspicuously curved at the columellar side than in the consubgeneric species. The conchologically most similar species, C. (L.) tropojanum sp. nov., differs by its relatively larger protoconch and, in the female genitalia, by the less conspicuously convoluted visceral oviduct.

Material examined

Holotype MACEDONIA: ♀ (in ethanol), Ohrid District, Galičica Mts., Bugarska Peak, E side , 1795 m a.s.l., 41.0037° N, 20.8470° E, 16 Oct. 2014, Fehér, Haring, Jaksch and Sattmann leg. ( NHMW 111649 ).

Paratypes MACEDONIA: 9 spec., same collection data as for holotype ( NHMW 111651 /4+4a+1ja); 4 spec., ca 200 m N of Bugarska Peak, 1795 m a.s.l., 41.0051° N, 20.8462° E, 16 Oct. 2014, Fehér, Haring, Jaksch and Sattmann leg. ( NHMW 111249 /2a+2ja); 1 spec., ca 300 m W of Bugarska Peak , 1735 m a.s.l., 41.0046° N, 20.8432° E, 16 Oct. 2014, Fehér, Haring , Jaksch and Sattmann leg. ( NHMW 111650 ).

Other material

ALBANIA: Shkodër District, Qafa e Pejës, N of Okol, 1700 m, 42.4332° N, 19.7671° E, 6 Jul. 2003, Erőss , Fehér , Kontschán and Murányi leg. ( HNHM 97221 ); path from Qafa e Pejës to Maja e Harapit, 1800 m a.s.l., 42.4431° N, 19.7637° E, 1 Jun. 2005, Barina, Murányi, Pifkó leg. ( HNHM 94927 ).

Measurements

Holotype: H 7.3 mm, W 3.4 mm, Wbw 2.8 mm, Ha 2.4 mm, Wa 2.3 mm.

Paratypes (N= 10): H 6.7–7.7 mm, W 3.2–3.6 mm, Wbw 2.7–3.0 mm, Ha 2.1–2.6 mm, Wa 1.9–2.5 mm.

Description

SHELL. Small, with 7½–8½ whorls (H/W ratio 2.42–2.57). The initial 2.4 whorls form the protoconch, which is smooth for the first 0.5–0.7 whorl and then finely costulate with closely spaced riblets. The protoconch is relatively large (Dp/D4th =0.73). The shell is more or less dark horn-brown, without spots. The teleoconch whorls are costate, with whitish, slightly irregular in height, rounded ribs. The ribs are quite regularly and narrowly spaced, with 9–10 ribs per mm both on the 4th whorl and on most of the body whorl. The ribbing is less prominent and denser on the last part of the body whorl approaching the aperture. The peristome is moderately developed; the lip broadens at the columellar side before curving increasingly back and covering the umbilicus. While approaching the aperture, the body whorl enlarges, while forming a moderately developed external lobe.

FEMALE GENITALIA. Bursa copulatrix very large, with a more or less posterior connection of the pedunculus. The short seminal receptacle is confined to the ventral side of the body. The tortuous loops of the visceral oviduct are situated over the apex of the seminal receptacle. The junction of the uterine gland and the copulatory duct is moderately far from the connection between the distal oviduct and the pedunculus.

Etymology

This species is named after Ms Katharina Jaksch-Mason (NHMW) who found the first individual of this species at Bugarska Peak.

Distribution

This species is known from two mountain ranges that are nearly 200 km apart, i.e., the Galičica Mts in southwestern Macedonia, Ohrid District, and the Prokletije (= Bjeshkët e Nemuna) Mts in northern Albania. It occurs at altitudes above 1700 m. The former area is the southernmost occurrence known for the subgenus Lovcenia.

Habitat preference

Like most species of Cochlostoma , this is an obligate rock-dwelling snail that can be found on limestone cliffs or under boulders on rocky alpine grasslands.

Remarks

The molecular analyses confirm that the morphologically similar but geographically distant populations of the Bugarska Peak and the Pejë Pass are indeed conspecific.

Figures

Fig. 1. Distribution of the species of Cochlostoma (Lovcenia) Zallot et al., 2015 in the western part of the Balkan Peninsula.

Fig. 2. Potentially diagnostic distances and angles. 1 = shell height (H). 2 = height of aperture at the columellar side. 3 = height of the first whorl. 4 = width of body whorl (Wbw). 5 = width of the suture above the body whorl. 6 = width of the penultimate whorl. 7 = width of the suture above the penultimate whorl. 8 = distance between the 5 most central ribs on the 4th whorl up. 9 = diameter of the 4th whorl up. 10 = aperture width (Wa). 11 = width of the lip at the columellar side. 12 = aperture height (Ha). 13 = rib inclination. 14 = suture inclination. 15 = aperture inclination. 16 = protoconch diameter in upper view (Dp). 17 = end of the smooth part of the protoconch. 18 = end of the protoconch.

Fig. 5. Female specimens of Cochlostoma (Lovcenia) Zallot et al., 2015 used for anatomy (shells were destroyed before dissection). A. C. (Lovcenia) erika (A.J. Wagner, 1906) (HNHM 86387). B. C. (Lovcenia) dalmatinum (L. Pfeiffer, 1863) (NHMW 110430/MN/0162). C. C. (Lovcenia) tropojanum sp. nov. (NHMW 111248). D. C. (Lovcenia) jakschae sp. nov. (NHMW 111249). E. C. (Lovcenia) lanatum sp. nov. (HNHM 99861).

Fig. 6. Female genital morphology. See Table 1 for localities and Table 3 for measurements. A. Cochlostoma (Lovcenia) erika (A.J. Wagner, 1906) (HNHM 86387). B. Cochlostoma (Lovcenia) dalmatinum (L. Pfeiffer, 1863) (NHMW 110430/MN/0162). C. Cochlostoma (Lovcenia) tropojanum sp. nov. (NHMW 111248). D1. Cochlostoma (Lovcenia) jakschae sp. nov., Bugarska Peak population (NHMW 111249). D2. Cochlostoma (Lovcenia) jakschae sp. nov., Pejë Pass population (HNHM 97221). E. Cochlostoma (Lovcenia) lanatum sp. nov. (HNHM 99861).

Fig. 11. Cochlostoma (Lovcenia) jakschae Zallot, Fehér & Gittenberger sp. nov., holotype, Bugarska Peak, Macedonia (NHMW 111649).