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Parabirojimia multinucleata spec. nov. and Anteholosticha scutellum (Cohn, 1866) Berger, 2003, marine ciliates (Ciliophora, Hypotrichida) from tropical waters in south China, with a note on their SSU rRNA gene sequences

¹ Laboratory of Protozoology, Ocean University of China;
² Laborotary of Protozoology, Ocean University of China;
³ Zoology Department, King Saud University;
⁴ Department of Zoology, Natural History Museum;
⁵ Laboratory of Protozoology, College of Life Science, South China Normal University

⁶ E-mail: wsong{at}ouc.edu.cn

Few studies using modern methods have been carried out on ciliated protozoa in tropical marine waters. In the present work two hypotrichs, Parabirojimia multinucleata spec. nov. and Anteholosticha scutellum (Cohn, 1866) Berger, 2003 collected from Daya Bay in southern China, were morphologically investigated. Parabirojimia multinucleata is distinguished by the following combination of characters: slender body without a snout-like protrusion in the frontal field, and about 50 macronuclear nodules. The poorly known A. scutellum has never been investigated using modern methods hence a redescription is needed. During the present study observations of specimens in vivo and following protargol impregnation revealed new information concerning structures such as the cortical granules and the infraciliature. A redescription and improved diagnosis are supplied based on the China population. The small subunit (SSU) rRNA gene was sequenced for both organisms and comparisons with those of similar congeners clearly supports the findings based on morphological studies.