Tracheloraphis oligostriata (RAIKOV, 1962) FOISSNER & DRAGESCO, 1996

Ma, Mingzhen, Xu, Yuan, Yan, Ying, Li, Yuqing, Warren, Alan & Song, Weibo, 2021, Taxonomy and molecular phylogeny of four karyorelictid species belonging to the genera Apotrachelocerca and Tracheloraphis (Protozoa: Ciliophora), with descriptions of two new species, Zoological Journal of the Linnean Society 192 : -

SYN. TRACHELORAPHIS OLIGOSTRIATA SENSU Xu ET AL., 2011

( Figs 9, 10)

Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. o r g: a c t: 0 9 4 2 1 C 5 2 - 4 C E D - 4 5 1 8 - B 8 C 9 - 56FFF230E0EE

T h e d i a g n o s i s i s b a s e d o n b o t h t h e c u r r e n t population and the population described by Xu et al. (2011c).

Diagnosis: Extended cells about 300–600 Μm long in vivo, yellow-brownish to dark-brownish in colour; invariably six somatic kineties; cortical granules tiny, dark-brownish in colour, densely arranged in fragmented rows in glabrous stripe and sparsely distributed between ciliary rows; nuclear apparatus comprising four to 42 macronuclei and three to 19 micronuclei arranged in a strand; glabrous stripe about same width as body.

Type locality: The intertidal zone of a swimming beach near the the Zhanqiao Pier in Qingdao (36°03′50″N, 120°19′47″E), China .

Type specimens: A protargol slide containing the holotype specimen marked with an ink circle is deposited in the Laboratory of Protozoology, OUC (registration number: MMZ2019102102).

Etymology: The epithet is composed of the Greek prefix α Π ό (apo, derived from)and the species-group name oligostriata .

Description of the new population: Extended cells about 500 × 15 Μm in vivo; body dorsoventrally flattened about 2–3:1, flexible and contractile ( Figs 9A, D, 10A–C, K–N). Glabrous stripe about same width as body ( Figs 9B, C, 10I, J). All newly collected individuals grey-brownish to dark-brownish, likely caused by the presence of cortical granules. Cortical granules round, c. 0.5 Μm in diameter, dark-brownish in colour and always densely arranged (sometimes in fragmented rows) in glabrous stripe, sparsely distributed between kineties ( Figs 9E, F, 10D, E, O, P). Glabrous stripe same width as body ( Figs 9B, C, 10I, J). Contracted cells with many transverse and oblique folds, left side distinctly protruding and tuberculate ( Figs 9D, 10N). Invariably six somatic kineties; no anterior or posterior secant system on either side of glabrous stripe ( Figs 9B, C, 10I, J). One brosse kinety ( Figs 9I, 10G, R). Bristle kinety at margin of glabrous stripe ( Figs 9B, C, 10I, J). Nuclear apparatus comprising ten to 42 (usually eight to 22) macronuclei and three to 19 micronuclei, arranged in several small nuclear groups each usually with two or three macronuclei and one or two micronuclei, forming a strand along cell midline ( Figs 9G, J, 10J).