New species of marine nematodes from Qingdao, China Z. N. Zhang Shandong College of Oceanography, Qingdao, Shandong Province, China H. M. Platt Department of Zoology, British Museum (Natural History), Cromwell Road, London SW7 5BD Introduction This paper is the first taxonomic report on freeliving marine nematodes from China. The three new oncholaimid species described here were extracted from intertidal sand samples taken from beaches adjacent to the city of Qingdao in summer, 1981. Material and methods The specimens came from two intertidal localities: mid-tide level on Qingdao bathing beach and mean low water level east of Qingdao pier. Cumulative curves of the sediment grain size analysis data are shown in Fig. 1. The pier beach is considered polluted by sewage whereas the bathing beach is relatively clean. Methods of microscopic study, abbreviations and style of description were as set out in Platt & Zhang (1982). Systematic descriptions Oncholaimus qingdaoensis sp. nov. Fig. 2 MATERIAL STUDIED. Holotype: cf, BM(NH) 1982.1.2. Allotype: 9 BM(NH) 1982.1.5. Para-types: two males BM(NH) 1982.1.3^1. LOCALITY. Qingdao bathing beach, Shandong, China. DIMENSIONS cf.: 372 M 2590 ~, Ar . 00 , -2640um; a = 98; b = 7; c = 53 20 25 27 20 ~ 384 M 237 22 21 25 21 2420 urn; a = 97; b = 6; c = 48 cf 340 M 2331 ~~ or . n ~ , _ 3 -2380um; a = 92; b = 7; c = 49 20 21 26 20 9: 365 M 2300 22 31 32 24 2350 urn; a = 73; b = 6; c = 47 DESCRIPTION. Cuticle smooth. R, sensilla papilliform. R 2 + R 3 sensilla at the same level and equal in size: 8-9 urn, 40-45% h.d. Head constricted immediately posterior to cephalic setae. Amphid 9 jam wide, 40% c.d.: in some individuals the amphids are difficult to distinguish. Buccal cavity 25-27 urn deep. Large left subventral, small right subventral and small dorsal Bull. Br. Mus. nat. Hist. (Zool.) 45(5) : 253-261 Issued 29 September 1983 253
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