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Morphology and Molecular Phylogeny of a New Marine Hypotrichous Ciliate, Hypotrichidium paraconicum n. sp. (Ciliophora, Hypotrichia)
Author(s) -
Chen Lingyun,
Liu Weiwei,
Liu An,
AlRasheid Khaled A. S.,
Shao Chen
Publication year - 2013
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/jeu.12064
Subject(s) - contractile vacuole , biology , ciliate , anatomy , dorsum , spicule , ciliata , phylogenetics , taxonomy (biology) , morphology (biology) , phylogenetic tree , molecular phylogenetics , ontogeny , zoology , paleontology , sponge spicule , protozoa , gene , cytoplasm , vacuole , botany , microbiology and biotechnology , genetics , biochemistry
A new saline hypotrich, Hypotrichidium paraconicum n. sp., found in coastal waters near Hong Kong, China, was investigated with emphasis on its living morphology, infraciliature, ontogenesis, and phylogenetic position. A body that is pyriform, with a posterior end that is twisted helically toward the left, a distinct tail and a dark colour, characterizes H. paraconicum n. sp. The buccal cavity is prominent and the cortical granules, which are scattered or sparsely distributed, are colourless, round, and about 1 μm in diam. The contractile vacuole is near the left middle of the cell and there are one or two frontal cirri, four meridional rows and five or six cirral rows which exhibit a left‐handed spiral and which are distributed in the posterior portion on both sides. Three dorsal kineties are distributed in the anterior portion of the dorsal side. In our molecular phylogenies, based on SSU rRNA gene sequences, the position of H. paraconicum n. sp. is rather poorly resolved, providing some indication of a relationship with Neokeronopsis aurea and Rubrioxytricha ferruginea , which fall into the assemblage of oxytrichids ( s.l .).