Aegyriana paroliva Song and Wilbert, 2002

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 : 942-943

Aegyriana paroliva Song and Wilbert, 2002

( Figures 3A–E , 12B, C, E, F )

Redescription

Body generally less variable (less flexible) than in original population, generally oval in shape with conspicuous snout-like projection on anterior left ( Figure 3A, B ). Cells in median area distinctly thickened ( Figure 3B ). Cytoplasm dark grey due to numerous globules and food vacuoles ( Figure 3C ). Food vacuoles often large (about 5–10 M m across), full of green or reddish algae or flagellates, but not many diatoms ( Figure 3C ). No contractile vacuoles observed.

Ciliation basically matching original description well, preorally about six to seven kineties arched to left margin of cell with some anterior-most kineties consistently shifted dorsally ( Figure 3D ). Perioral kineties (oral apparatus) clearly in two groups: right one three-rowed and fragment-like, separated from the single left kinety; all structures consisting of densely arranged dikinetids. On ventral side, general arrangement of kineties similar to that described previously (Song and Wilbert 2002) with all postoral kineties terminating anteriorly at buccal region and forming dominant buccal area ( Figure 3D ). However, 18– 20 kineties on left posteriorly shortened gradually leftwards ( Figures 3D , 15E , arrowheads and arrows). About nine kineties at posterior end ‘‘interrupted’’ by podite and hence forming large glabrous area, on the right of which there are about eight kineties, and ca four on the left ( Figure 3D ).

Figures

Figure 3. (A–E) Aegyriana paroliva and (F–I) Hartmannula cf. angustipilosa from life (A–C) and after protargol impregnation (D–I). (A) Ventral view, to show a typical specimen; (B) ventral view, to demonstrate the thickened portion in central area; (C) schematic display, to show a cell with all kinds of food that it contains; (D) ventral view of infraciliature, arrowheads mark the shortened kineties on left side; (E) lateral view, to show the flattened body shape and the macronucleus; (F, G) dorsal view, to show the cytopharyngeal structure and nuclear apparatus, note that the macronucleus in some cases is conspicuously dimorphic (F); (H) ventral view, to show the general arrangement of somatic kineties; (I) detailed portion of ventral view, arrows mark the oral kineties (oral apparatus). Scale bars: 50 Mm (A, B, E); 40 Mm (H).

Figure 12. Photomicrographs of (A) Amphileptus sp., (B, C, E, F) Aegyriana paroliva, (D, I, J) Dysteria parovalis nov. spec., (G) Hartmannula cf. angustipilosa, (H, K) Orthodonella shenae, and (L) Telotrochidium sp. after protargol impregnation. (A) Infraciliature of anterior portion; arrows indicate the extrusomes; (B) ventral view of anterior portion; arrow indicates the cytopharynx; (C) ventral view of oral area, arrow marks the three-rowed perioral kineties; (D) left side, arrow marks the shortened left somatic kineties; (E) ventral view, arrows indicate the shortened kineties; (F) ventral view of caudal portion, white arrow indicates the glabrous area, whereas the black arrow points to the podite; (G) ventral view, arrows mark the perioral kineties; (H) ventral view of anterior part, arrow indicates the cytostome; (I) posterior portion, to show the podite; (J) the same specimen but focusing at different level, to show the argyrophilic patch (gland?); (K) ventral view, to show the highly developed cytopharynx (arrow); (L) lateral view, arrow marks the broad aboral wreath of cilia.

Figure 15. Photomicrographs of (A–I, N) Metaurostylopsis rubra, (P) Holosticha sp. and (J–M, O) Thigmokeronopsis magna nov spec. after protargol impregnation. (A) Ventral view of anterior portion in late divisional stage; (B) to show the macronuclei in replication stage (arrow marks the replication band); (C, D) detailed portion of the opisthe, black arrows in (C) and (D) indicate the fronto-terminal cirri; white arrow in (D) points to the ventral row; (E, F) buccal field, white arrow in (E) marks the fronto-terminal row, while double-arrowheads indicate the buccal cirrus; black arrow in (F) points to the long fronto-terminal row; (G, H) ventral view of proter, arrow in (G) marks the fronto-terminal cirral row; (I) ventral view, to show the general pattern of ventral, marginal and transverse cirri; (J) portion of dorsal side, to show the dorsal kineties (arrowheads); (K) ventral view, to show the thigmotactic area, note that the cirri are densely but irregularly arranged (arrows); (L) ventral view of caudal part, arrow indicates the transverse cirri; (M) ventral view of buccal region, white arrow indicates the two fronto-terminal cirri, whereas the black one marks the distal end of adoral zone of membranelles; (N) ventral view in a late divider, to show the newly formed transverse cirri (arrows); (O) to show the fibres connecting to the marginal cirri; (P) dorsal view, to show the large extrusomes (arrowheads).