Orobdella Oka, 1895

Nakano, Takafumi, 2016, Four new species of the genus Orobdella from Shikoku and Awajishima island, Japan (Hirudinida, Arhynchobdellida, Orobdellidae), Zoosystematics and Evolution 91 (1), pp. 79-102 : 81

Taxon classification Animalia Arhynchobdellida Orobdellidae

Genus Orobdella Oka, 1895

Orobdella Oka, 1895: 278-280; Oka 1910b: 177; Soós 1966: 377, 381, 382; Richardson 1975: 42; Lukin 1976: 463, 464; Sawyer 1986: 680; Nakano 2010: 881; Nakano 2011b: 3.

Kumabdella Richardson 1971: 590, 591 (type species, Orobdella octonaria Oka, 1895 by original designation).

Type species.

Orobdella whitmani Oka, 1895 by subsequent designation of Soós (1966).

Diagnosis.

Body firm and muscular, elongate, with constant width in caudal direction, dorsoventrally compressed. Somite I completely merged with prostomium. Somite II uniannulate, not separated from I. Mid-body somite annulation variable, complete quadr-, sex- or octannulate. Post-anal annulus absent. Male gonopore in posterior part of XI. Female gonopore in anterior part of XIII. Pappilae numerous, minute, hardly visible, one row on every annulus. Pharynx agnathous, euthylaematous. Crop tubular, acaecate. Gastropore, when present, in anterior part of XIII. Gastroporal duct generally lying on female organ. Intestine tubular, acaecate. Rectum tubular, thin-walled, straight. Testisacs multiple. Ejaculatory bulbs absent. Male median reproductive system in posterior part of XI, without penis or penis sheath. Ovisacs globular. Oviducts thin-walled. Common oviduct thin-walled, short. Female median reproductive system essentially lacking.