| 高娟,汪安泰,张宇.2011.斜口涡虫(原卵黄目,斜口科)的生物学特性.动物学杂志,46(5):8-12. |
| 斜口涡虫(原卵黄目,斜口科)的生物学特性 |
| Biological Characteristics of Plagiostomum sp. (Prolecithophora,Plagiostomidae) |
| 投稿时间：2011-05-03 修订日期：2011-06-30 |
| DOI： |
| 中文关键词: 原卵黄目 新纪录 斜口涡虫 |
| 英文关键词:Prolecithophora New record Plagiostomum |
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| 中文摘要: |
| 本文报道了采自广东惠州市东江支流 (23°09'00.31″N,114°22'26.59″E)的中国涡虫一新纪录目原卵黄目(Prolecithophora)斜口涡虫(Plagiostomum sp.)。该虫体长4.51~6.00 mm,体被不规则的褐色细网纹,头钝圆,尾圆锥形,体中部圆柱状,眼点4只。该涡虫运动缓慢,对光刺激反应迟钝,喜捕食淡水单肠目(Rhabdocoela)及大口虫目(Macrostomida) 涡虫。温度为18~25℃时,成虫每日产卵1枚,孵化期10~15 d,每只卵孵化幼虫5~12只,幼虫发育20~25 d后性成熟。组织切片显示:外表皮基底膜厚度是其皮层的1/3~1/2,褐色细网纹位于基底膜内侧。卵巢位于精巢前位,两者无明显界限,弥散分布于消化道两侧。无明显的交配囊、受精囊、输精管及输卵管。外来精子分布于卵巢、脑周、中胚层介质及消化道上皮。肉质的阴茎盘旋于其鞘内。同时,对该涡虫的分类和分布等进行了初步讨论。 |
| 英文摘要: |
| This study for the first time reported a newly recorded order of turbellarians in China.Prolecithophora,a species Plagiostomum sp.,was collected from East River in Huizhou City (23°09'00.31″N,114°22'26.59″E),Guangdong Province.It was 4.51-6.00 mm long,with 4 eyes,a blunt round head,and a tapered tail.Its body,whose middle part appeared spindle-shaped,was covered with irregular brown fine grain.This flatworm was inactive and showed no response to light stimulation.It could feed on Rhabdocoela and Macrostomida turbellarians.It laid 1 egg per day,and 5-10 larvae were hatched from one egg in 10-15 d; subsequently these larvae matured in 20-25 d at 18-25℃.Histological observation showed that the basement membrane,beneath which there was brown fine grain,was one-third to half the thickness of its ectoderm.The ovary was anterior to testis,and both of them were located in both sides of enteron.Suprisingly,there was no boundary between ovary and testis.Bursa copulat rix,receptaculum seminalis,deferens and oviduct were absent.Extraneous spermatozoa distributed extensively around brain,ovary,mesoblast and endothelium of alimentary canal.Fleshy copulatory apparatus was circled in its sheath.Finally,this paper discussed the taxonomy and distribution of this species. |
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