Morphology and infraciliature of two marine species of Hartmannula (Protozoa, Ciliophora, Cyrtophorida), from scallop-farming waters off Qingdao (Tsingtao), China

The living morphology, infraciliature and silverline system of two marine cyrtophorid ciliates, Hartmanuula derouxi nov. Spec. and H. angustipilosa Deroux and Dragesco, 1968, collected from scallop-farming waters near Qingdao (Tsingtao), China, have been investigated. The new species is characterized by: size in vivo 60-120 x 30-70 mum, body long oval to elongate in outline, pellicle covered with a smooth, thin layer of gel-like substance; 42-53 ventral kinetics, the rightmost 11-12 of which extend apically; about 30 nematodesmata; with about 25 ventrally located contractile vacuoles. Based on the Qingdao population and on previous descriptions, an improved diagnosis of Hartmannula angustipilosa is suggested: body oval in outline, size in vivo 40-80 x 20-50 mum; 20-28 ventral kineties, the rightmost five to six of which extend apically; about 10 nematodesmata; four to seven contractile vacuoles arranged in a longitudinal row on right side of cell. Additionally, the diagnosis of the genus Hartmannula is re-defined: dorsoventrally flattened Hartmannulidae with tail-shaped podite, oral structure consisting of three obliquely arranged fragments of dikinetids: one preoral and two circumoral; each nematodesmata tipped with one distinct tooth; somatic kineties progressively reduced from right to left posteriad; no gap between left and right field; podite subcaudally positioned, near but not surrounded by somatic kineties.