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Two New Species of Symbiotic Ciliates from the Respiratory Tract of Cetaceans with Establishment of the New Genus Planilamina n. gen. (Dysteriida, Kyaroikeidae)
Author(s) -
MA HONGWEI,
OVERSTREET ROBIN M.,
SNIEZEK JAMES H.,
SOLANGI MOBASHIR,
WAYNE COATS D.
Publication year - 2006
Publication title -
journal of eukaryotic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 1066-5234
DOI - 10.1111/j.1550-7408.2006.00124.x
Subject(s) - biology , anatomy , genus , coelom , zoology , taxonomy (biology) , apex (geometry) , whale , ecology
ABSTRACT. Examination of mucus discharged from the blowhole of Atlantic bottlenose dolphin ( Tursiops truncatus ) at Marine Life Oceanarium, Gulfport, Mississippi, and false killer whale ( Pseudorca crassidens ) and Atlantic bottlenose dolphin at SeaWorld Orlando, Orlando, Florida, using live observations and protargol impregnation revealed mixed infections of Kyaroikeus cetarius and two new species. Planilamina n. gen. is characterized by a C‐shaped argentophilic band located along the laterally flattened margin of cell and extending from the cell apex to subposterior cone‐shaped podite; a deep oral cavity containing one short preoral kinety, two circumoral kineties, seven to 13 infundibular kineties, and a cytostome; a broadly funnel‐shaped cytopharynx reinforced by argentophilic fibers but without nematodesmata; closely packed postoral kinetofragments set in a pocket located anterior left of the podite; and somatic kineties as a right field closely situated at the right surface and a left field bordering the anterior left margin of the oral cavity. The type species for the genus, Planilamina ovata n. sp., is distinguished from its sister species Planilamina magna n. sp. by the following characteristics: body size (28–65 × 20–43 μm vs. 57–90 × 40–63 μm), number of right field kineties (38–55 vs. 79–99), and position of the anterior end of the leftmost kinety in the right somatic field (anterior one‐third vs. mid‐body). The morphogenesis of Planilamina ovata is similar to that of K. cetarius . The diagnosis of Kyaroikeidae is emended to accommodate the new genus.