Askoella helіostoma Jankowskі, 1967b : 87, Jankowski, 1967

Dovgal, Igor & Mayén-Estrada, Rosaura, 2015, A taxonomic revision of order Pilisuctorida (Ciliophora, Apostomatia) with keys to the subordinate taxa, Zootaxa 4040 (5), pp. 543-558 : 552

Askoella helіostoma Jankowskі, 1967b: 87

( Fig. 2 D)

Ciliate parasiting the mantle cavity of barnacles. Body oval, light, filled with food vacuoles. The apical region of the body is tapered, the antapical bearing the characteristic groove which leads into a long convoluted canal ending near rosette. There are 3 short kineties in the canal. The rosette septae are radial. On the ventral region of the cell, 2 elongated right-and 3 left-handed kineties are located. On the dorsal side of the body two kineties are present, one on the right and other on the left side. The anterior cytostome possess one right side haplokinety and two polykineties on the bottom of cytostomal fossa. Macronucleus is U-shaped, long, large, irregular.

Measurements (in µm): Body length 35, width 25 (after Jankowskі, 1967b).

Type host: Semibalanus balanoides .

Type locality: the Barents Sea near Murmansk ( Russia).

Figures

FIGURE 2. Ciliates of genera Askoella and Ascophrys described by different authors. A—ventral side of Askoella janssoni; B—dorsal side of A. janssoni (scale bar 10 µm); C—macronucleus morphology of A. janssoni; D— A. heliostoma; E—trophont of Ascophrys rodor: F—phoront of Ascophrys rodor (A – C—modified from Fenchel, 1965; D—modified from Jankowski 1967 b; E-F—modified from Deroux, Campillo and Bradbury, 1975).