Theodoxus jordani (Sowerby, 1832) |
Jordan drainage basin, north to Ceyhan river, S. Turkey. On rocks in freshwater; micrograzer. Original taxon: Neritina anatolica. The species is very close to macrii (Sowerby, 1849) but differs by its zebrated pattern, while macrii is uniformly dark. A specimen from Tiberias area, on the western shore of the Sea of Galilee, E. Israel. 5,5mm. Henk K. Mienis legit (IL). |
Shape variations in the population of Tiberias. 7-7,8mm. |
Sowerby’s Conchological illustrations only gave a picture, and no description. It was not until the second volume of the Thesaurus conchyliorum that an explanation appeared, complemented by a figure from the plate CIV (inset above): « Of a globose form, inclining to oval, with a tendency to contraction in the middle of the last whorl or nearer the upper part. » – op. cit. p.531.– This “contraction” does not appear in most specimens. – Same spot. Young shell. 3mm. |
A specimen from the Jordan river. 6mm. |
Possible jordani collected near the mouth of a river located east of Yeanikaş, Aydıncık, in the western part of Mersin province, S. Turkey. 5,2-5,5mm. Or is it a danubialis? |
— back to Neritininae — |