| 摘要: |
| 在对海南岛及渤海滨州贝壳堤岛的自由生活海洋线虫进行分类鉴定和多样性研究中，发现拟色矛线虫属2个新纪录种：微拟色矛线虫（Chromadorita minima（Kreis）Wieser，1954）和异常拟色矛线虫（Chromadorita abnormis（Kreis）Gerlach，1965），并进行了描述。其中，微拟色矛线虫（C.minima）具有以下特征：体型粗短，体表具横向均匀排列的斑点、无环纹；口腔具有大的稍弯曲的背齿、头刚毛5-6μm；交接刺均匀、弯曲、近端不膨大、长约为泄殖孔体径的1.5倍、引带突尾状、无肛前辅器。以上特征与原始描述一致，但交接刺稍短（30-35μm vs 41μm）（测量6个个体）。异常拟色矛线虫（C.abnormis）虫体细长，体表具横向均匀分布的环纹和斑点；头刚毛长0.4-0.5倍头径、化感器为横向的肾形、口腔具有一个稍大的背齿和两个较小的亚腹齿；交接刺细长、向腹面弯曲呈弧状、近端头状、远端渐尖、引带板状、无引带突、具5个杯状的肛前辅器。其特征与原始描述相似，特别是德曼值a、b、c一致，但该标本体型较大（818-1231μm vs 810-842μm），交接刺稍长（44-49μm vs 25-33μm）（测量9个个体）。 |
| 关键词: 微拟色矛线虫Chromadorita minima(Kreis) Wieser,1954 异常拟色矛线虫Chromadorita abnormis(Kreis) Gerlach,1965 新纪录种 |
| DOI：10.11693/hyhz20200100010 |
| 分类号:Q19 |
| 基金项目:国家自然科学基金资助项目，41676146号。 |
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| TWO NEW RECORD SPECIES OF CHROMADORITA FILIPJEV, 1922 FROM CHINA |
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WU Qing-Hua1, LU Yang2, SUN Jing2
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1.Primary School Attached to Liaocheng University, Liaocheng 252000, China;2.College of Life Sciences, Liaocheng University, Liaocheng 252000, China
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| Abstract: |
| Two species of Chromadorita Filipjev, 1922 were recorded for the first time in China, and are described here. The first new record is Chromadorita minima (Kreis) Wieser, 1954 that was collected in May, 2019, in intertidal zone of the Bohai Sea (38°13'55″N; 117°56'39″E). It is characterized by small and comparatively thick body. The punctuations in similar size are along the body and arrange closely in transverse rows. A big crooked dorsal tooth is in buccal cavity. Head is characterized by four cephalic setae, in length of 5-6μm. Spicules are curved, with a length of 1.5 times of its cloacal body diameter. Cloacal supplement is absent. Features of species described here are identical with the original description except that body is longer (507-555μm vs 440μm) and spicules are shorter (30-35μm vs 41μm). The second new record Chromadorita abnormis (Kreis) Gerlach, 1965 was collected in February, 2017, in intertidal zone of Dongfang, Hainan (18°50'43″N; 108°46'56″E). It is characterized of slend body. Cuticle transversely annulated and dotted. Four cephalic setae thin, 0.4-0.5 times of labial region width. Amphidial fovea in the shape of transverse reniform. Esophagostoma armed with a big pointed sclerotized tooth on the dorsal wall of stoma and two small denticles on both subventral walls. Spicules slender, curved, with well-developed capitulum. Gubernaculum in the shape of plate, without dorsal apophysis. Five cup-shaped cloacal supplements. Compared with original record, the body is bigger (818-1231μm vs 810-842μm) and the spicules are longer (44-49μm vs 25-33μm). |
| Key words: Chromadorita minima (Kreis) Wieser, 1954 Chromadorita abnormis (Kreis) Gerlach, 1965 new record species |
