Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 96. (Budapest 2004)

Verdcourt, B.: New and little known species of terrestrial Mollusca from East Africa and Congo (Kinshasa)

HYDROCENIDAE Hydrocena tanzaniensis sp. n. (Fig. 1) Type material - Holotype: Tanzania, Morogoro Region, Kimboza Forest Reserve. 4.11.1987. MAHUNKA, PÓCS & ZlCSl (HNHM 93857). Paratypes: same date and locality as holotype (HNHM 93972/6); Tanzania, East Usambaras, Amani, botanical garden, sieved from soil, 8.II 1987, MAHUNKA, PÓCS & ZICSI (HNHM 93858/1 ); Meru, S slope, above Usa River, "Átnyergelő rét" (1700 m), 30.1 V. 1979. EŐRY & SIPOS (HNHM 93973/5) Diagnosis - Closely related to Hydrocena kenyana CONNOLLY, 1929 but with a fine sculpture of numerous interrupted raised lines. Description - Shell pale brown, broadly conical; apex rounded, mamilliform, with an angle of about 75° between projected sides, with 3-4 strongly convex visible whorls; suture deep; umbilicus closed with an irregularly lunate slightly concave finely shagrcened callus, the edges slightly raised where it meets the body whorl. Apical whorl + smooth, the rest particularly the body whorl with dense fine interrupted raised lines sloping at ± 30° to the horizontal; there are also fine transverse growth lines, more noticeable in worn shells of lot HNHM 93973/5 which have lost their perioslracum. Aperture subovate, the outer edge strongly rounded, the inner oblique and straight. Operculum withdrawn into shell, with concentric rings based on a focus near base, slightly concave, ± 1.3 mm long, without internal peg. Dimensions: height 2.45-3 mm, breadth 1.9-2.3 mm. Figs 1-4. 1 = Hydrocena tanzaniensis sp. n., paratype, 2 = Nesopupa bisulcata bisulcata (JlCKELI, 1974), 3 = Cecilioides callipeplum (CONNOLLY, 1923 ), 4 = C. tribulalionis ( PRESTON, 1911) (scale bar = 1 mm ) Annls hi si.-na I. Mus. nain. hung. 96. 2004