Heterotrophic ¯ agellates (Protista) from marine sediments of Botany Bay, Australia Author Lee, Won Je Author Patterson, David J. text Journal of Natural History 2000 34 483 562 journal article 1464-5262 Rhynchomonas nasuta Klebs, 1893 (®gures 1l, 2r) Description. Gliding cells with a bulbous motile snout. Cell 3.5±6 Mm long, 2.5±4 Mm wide, ¯attened, ¯exible. The snout, which contains a mouth, beats slowly. The anterior ¯agellum lies alongside the snout and is hard to see, and the trailing ¯agellum is about 2±2.7 times the cell length, and is acronematic. Cells consume attached bacteria. Commonly observed. Remarks. The length of R. nasuta has previously been reported to be from 3 to 11 Mm. This species has been found in marine sites in Antarctica , North Atlantic, subtropical and tropical Australia , Brazil , Canada , Denmark , Fiji , Gulf of Finland , Greenland , Hawaii, Norway and Equatorial Paci®c ( Griessmann, 1913 ; Throndsen, 1969 , 1970 ; Burzell, 1973 ; Larsen and Patterson, 1990 ; Vùrs, 1992a, 1992b, 1993a; Patterson et al ., 1993 ; Vùrs et al ., 1995; Ekebom et al ., 1996 ; Patterson and Simpson, 1996 ; Tong et al ., 1997 , 1998 ; Bernard et al ., 1999 ). Rhynchomona s nasuta is common and widespread, but usually does not occur in large numbers. Our observations are in good agreement with those of Larsen and Patterson (1990) . This species can be distinguished from small species of Amastigomonas by the bulbous snout.