Notes on a new marine peritrichous ciliate (Ciliophora: Peritrichida), Zoothamnium xuianum n. sp., with redescription of Z. paraentzii Song, 1991 from northern China
Notes on a new marine peritrichous ciliate (Ciliophora: Peritrichida), Zoothamnium xuianum n. sp., with redescription of Z. paraentzii Song, 1991 from northern China
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DOI：
10.11646/zootaxa.1075.1.2
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发表时间：
2005-11
期刊：
影响因子：
0.9
通讯作者：
P. Sun;D. Ji;Weibo Song
中科院分区：
文献类型：
--
作者：
P. Sun;D. Ji;Weibo Song
本文采用体内浸渍法和银浸渍法，对中国北方某对虾孵化场中捕获的两种海相含磷纤毛虫（Zoothamnium xuianum n. sp.和Z. paraentzii Song, 1991）的形态、基础设施和银线系统进行了研究。该新种具有以下特征：群体分枝交替，动物体表长约45 × 30 μm，有单层表皮唇；可收缩的液泡位于顶端；大核呈带状，横置；从肠壁周围区到胎儿转子带有50多条条纹，从胎儿转子带到肠镜约有14条；在青霉3上三个相等长的运动体彼此平行。根据青岛种群和原始描述，提出了双亲弧菌的改进诊断：具有不规则二分枝茎的海洋Zoothamnium；活体动物外形50-80 × 25-45 μm，单层膜周唇；顶端位置的可收缩液泡；大核c形，横向取向；前端与胎儿转子带之间的银线数约75 ~ 83条，胎儿转子带与scopula之间的银线数约28 ~ 33条；青霉3的内行从另外两行移开并与青霉1在卵生端收敛。
The morphology, infraciliature and silverline system of two marine peritrichous ciliates, Zoothamnium xuianum n. sp. and Z. paraentzii Song, 1991, collected from a shrimp-hatching plant in northern China, were investigated using both in vivo and silver impregnation methods. The new species is recognized by the following characters: colony alternatively branched, zooids in vivo about 45 × 30 μm with single-layered peristomial lip; contractile vacuole apically located; macronucleus band-like and transversely positioned; more than 50 striations from peristomial area to aboral trochal band, about 14 from aboral trochal band to scopula; three equally long kineties in peniculus 3 parallel to each other. Based on both the Qingdao population and the original description, an improved diagnosis for Z. paraentzii is suggested: marine Zoothamnium with irregularly dichotomously branched stalk; zooid 50–80 × 25–45 μm in vivo with single-layered peristomial lip; contractile vacuole apically positioned; macronucleus C-shaped, transversely orientated; number of silverlines between anterior end and aboral trochal band about 75–83, between aboral trochal band and scopula, 28–33; inner row of peniculus 3 displaced from the other two and converges with peniculus 1 at aboral end.