Hartmannula cf. angustipilosa Deroux and Dragesco, 1968

Wilbert, Norbert & Song, Weibo, 2005, New contributions to the marine benthic ciliates from the Antarctic area, including description of seven new species (Protozoa, Ciliophora), Journal of Natural History 39 (13), pp. 935-973 : 943-944

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https://doi.org/ 10.1080/00222930400001509

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Hartmannula cf. angustipilosa Deroux and Dragesco, 1968


Hartmannula cf. angustipilosa Deroux and Dragesco, 1968

( Figures 3F–I View Figure 3 , 12G View Figure 12 ; Table IV)

We failed to observe some critical features in vivo such as contractile vacuoles and other living characters for this Antarctic form. Although many well-impregnated specimens have been obtained. Its identification remains uncertain and we can here only tentatively describe it as a population of Hartmannula angustipilosa Deroux and Dragesco, 1968 .


Body size about 60–90630–50 M m in vivo, mostly long oval with inconspicuous snoutshaped projection on anterior left ( Figure 3H View Figure 3 ). Dorsoventrally distinctly flattened, ventral side flat, dorsal vaulted. Podite about 15 M m long. Cytostome prominent, sub-apically located in a longitudinal to oblique orientation; pharyngeal basket consisting of about 15 cytopharyngeal rods, extending slightly leftwards and posteriorly ( Figure 3G View Figure 3 ). Dimorphic macronucleus large and oval, positioned in mid-body and containing several large nucleoli ( Figure 3G, H View Figure 3 ). Micronucleus not detected.

About nine rightmost kineties extending preorally, with anterior portion curved to left margin; one terminal fragment positioned on anterior-left margin of cell. All other kineties (ca 18–26 in number) terminating around cytostome, leaving narrow glabrous buccal area. In addition to these normal kineties, there is one fragment-like equatorial right kinety with about 15 basal bodies in mid-body ( Figure 3H, I View Figure 3 ).

Oral ciliature consisting of (constantly) three short rows of dikinetids, which are obliquely (and preorally as well) positioned: one is anteriorly located and two posteriorly ( Figures 3I View Figure 3 , 12G View Figure 12 , arrows).


Deroux and Dragesco (1968) described three populations under the name Hartmannula angustipilosa , these are remarkably different in size and numbers of somatic kineties. The Antarctic form resembles the largest population in both body shape, size and the number of kineties. We speculate that the three populations in the original description might represent different species. Further information is required.

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