Laeocathaica odophora Moellendorff, 1899

Figure 22

Laeocathaica odophora Möllendorff, 1899: 97-98, pl. 6, fig. 6.

Laeocathaica odophora . - Yen 1939: 149, pl. 15, fig. 39.

Laeocathaica (Laeocathaica) odophora . - Zilch 1968: 174.

Laeocathaica odophora . - Chen and Zhang 2004: 328, fig. 318.

Type material.

S-Gansu, Dshie-dshou, coll. Möllendorff ex coll. Potanin 254, SMF 8954 (holotype = juvenile shell, Fig. 22A).

New material.

China • 1 photographed shell; Gansu, Longnan Shi, Wenxian, Jianshan Xiang, 1800 m west of Jianshan towards Diaohuya, right side of road no. 212 (locality code: 2016/70b); 33°2.922'N, 104°50.840'E; 29 May 2016; A. Hunyadi leg.; HA (Fig. 22B) • 5 adult + 2 juvenile shells; Gansu, Longnan Shi, Wenxian, Jianshan Xiang, 1200 m south of Hekou Cun, eastern bank of Bailong He (locality code: 2016/68); 33°01.703'N, 104°53.602'E; 810 m a.s.l.; 29 May 2016; A. Hunyadi leg.; HA • 1 shell; Gansu, Longnan Shi, Wenxian, Jianshan Xiang, western edge of Hekou Cun towards Caojiaba, right side of road no. 212 (locality code: 2016/69); 33°2.343'N, 104°53.045'E; 29 May 2016; A. Hunyadi leg.; HA • 1 juvenile shell; Gansu, Longnan Shi, Wenxian, Chengguan Zhen, next to a museum (locality code: 2016/64); 32°56.471'N, 104°40.379'E; 960-970 m a.s.l.; 28 May 2016; A. Hunyadi leg.; HA .

Description.

Shell sinistral, depressed, strongly keeled, dorsal side domed, ventral side conical; shell colour basically brownish, greyish, latte-coloured, with whitish stripes; as a result dorsal surface mosaic-like, ventral side striped; keel always white, there is always a brownish belt just below the keel, periumbilical keel always white; entire shell consists of 9-9.5 whorls; protoconch consists of 1.5 whorls, brownish, seemingly smooth, extremely finely granulose, rather matte; white keels of every whorl slightly elevated from dorsal surface, but dorsal surface almost continuous, suture practically absent; dorsal side with fine, irregular wrinkles (most wrinkles stand alone, but some of them unite to each other); ventral surface with less prominent wrinkles; umbilicus rather narrow, regular funnel-shaped, shows all whorls; periumbilical keel blunt; aperture semilunar, peristome very slightly expanded, but not reflexed or thickened; palatal swelling whitish, with two prominent denticles, situated in some distance from peristome; parietal wall with some whitish thickening in adult shells. Juveniles reverse conical in shape; several apertural barriers are built during lifetime; palatal swelling of juveniles appears as a continuous ridge, although the two denticles recognisable.

Distribution.

Known from a few localities in southern Gansu Province (Fig. 17).

Remarks.

The single juvenile shell of sample 2016/64 has a narrower, blunter umbilical keel than the holotype, and it is possible that it belongs to another species. However, the juvenile shell of sample 2016/68 is identical with the holotype.