Condylostoma curvum Burkovsky, 1970

Ghosh, Subhadeep, Ghosh, Arnab, Bharti, Daizy & Kumar, Santosh, 2022, Four New Records of Ciliated Protists from Lakshadweep, India, Records of the Zoological Survey of India 122 (3), pp. 291-298 : 292-294

3. Condylostoma curvum Burkovsky, 1970 (basionym: Condylostoma curva Burkovsky, 1970 ) ( Figure 3 A-H)

Brief description of the Indian population (based on two specimens from live and five from protargol impregnation): Size about 60 × 35 μm in protargol preparations; cells are wider, shorter and have a rounded posterior end. A large cavity defines the buccal area. The adoral zone of membranelles occupies approximately 39% of the body length and is composed of about 32 membranelles. Cortical granules present, scattered in between the ciliary rows. Moniliform macronucleus with, on average, eight nodules. On average, there are 20 somatic kineties.

Material deposited: Four slides with protargolimpregnated specimens have been deposited at the National Zoological Collections of the Zoological Survey of India, Kolkata, India with the following accession numbers: Pt. 5228, Pt 5229, Pt 5230, and Pt 5231.

Occurrence and ecology: Originally collected from White Sea, Russia ( Burkovsky, 1970): China and Korea ( Song et al., 2003; Chen et al., 2011; Kim et al., 2012; Yan et al., 2015). The Indian population of C. curvum was isolated from a soil sample collected from Kavaratti Island, Lakshadweep, India (10°50’30.2”N 72°11’09.1”E). Usually feeds on bacteria and algae.

Figures

Figure 3. Photomicrographs of live (A-D) and protargol impregnated (E-H) specimens of Condylostoma curvum Indian population. A, B. Specimen showing the body shape (A), cortical granules (small arrow) and somatic kineties (arrowhead) (B). C. Anterior end of specimen showing buccal lip (arrowhead). D. Position and shape of macronuclear nodules. E, H. Dorsal (E) and ventral (H) view of specimens showing body shape and somatic kinety rows. F.Enlarged view of macronuclear nodules, G. Buccal field with peristomial kineties (arrowhead). Ma - Macronuclear nodules. Scale bars: 40 μm.