Belgrandiella angelovi Pintér, 1968

Georgiev, Dilian, 2011, New localities of four Bulgarian endemic Hydrobiidae species (Mollusca: Gastropoda: Risooidea), ZooNotes 2011 (16), pp. 1-4 : 2

Belgrandiella angelovi Pintér, 1968

Material examined: 24 adults, 20.09.2009, Stara Planina Mts. , west of Gabrovo town, near village of Zeleno Darvo, two springs in Fagus sylvatica forest, UTM LH53, D. Georgiev leg.

Diagnosis: The main characters discerning this species from the similar Belgrandiella zagoraensis Glöer & Georgiev 2009 living in Sarnena Sredna Gora Mt are the opaque shell, the ovally broad aperture with louvered outer margin (versus non opaque shell, oval aperture with vertical outer margin) ( Fig. 2 ).

Discussion: The anatomy of B. angelovi was not known till now ( Pintér 1968). Here we can note down that our specimens had white mantle and a simple regularly broad penis (1 spec. dissected), sharply tapered at its distal part (which also discerns this species from the similar B. zagoraensis which distal penis part is tapered) ( Fig. 2 ). The last character surely puts this species into the genus Belgrandiella .

Figures

Fig. 2. Belgrandiella angelovi from the new locality: 1 – shell, front view, 2 – shell, side view, 3 - penis.