嫁(虫戚)属2种的齿舌形态差异分析  

Morphological Discrimination of Radula between Two Species of Cellana

作　　者：钱伟[1,2] 王一农[1,2] 陆开宏[1,2] 王家衡[2] 刘联国[1,2] 

机构地区：[1]宁波大学教育部应用海洋生物技术重点实验室,宁波315211 [2]宁波大学生命科学与生物工程学院,宁波315211

出　　处：《动物学杂志》2011年第1期76-85,共10页Chinese Journal of Zoology

基　　金：宁波市科技局项目(No.2008C50027);宁波大学2010年优秀学位论文培育基金项目(No.PY20100012)

摘　　要：在光镜和电镜下对嫁(虫戚)(Cellana toreuma)和斗嫁(虫戚)(C.grata)的齿舌形态进行观察比较。2种嫁(虫戚)的齿式都为1.1.0.1.1,即具有1枚侧齿和1枚缘齿,缺乏中央齿。齿舌前端都有1小段弯曲,齿片排列松散且存在明显的磨损现象。嫁(虫戚)和斗嫁(虫戚)的侧齿形状很相似,侧齿呈镰刀型且具1个齿尖,基部近似三角形且具突起,尖齿部分细长。两种嫁(虫戚)的缘齿存在一定的差异,嫁(虫戚)缘齿具3个齿尖,第2尖齿靠近第3尖齿。斗嫁(虫戚)缘齿具2个齿尖且比较细长,第2尖齿靠近缘齿基部。本文用17个参数对这两种嫁(虫戚)的齿舌带及其前中后3段上的齿片进行了测量比较,发现斗嫁(虫戚)齿舌带的长宽比明显大于嫁(虫戚)齿舌带的长宽比,即斗嫁(虫戚)的齿舌带显得更加细长。齿舌带前、中、后3段各比例参数的值存在一定的关系,即中段大于前段、中段大于后段。据此认为用齿舌作为2种嫁(虫戚)的分类依据是可行的。The radular morphology of Cellana toreuma and C. grata was observed by optical microscopy and electron microscopy. Without central tooth, the radular formula of two limpets was 1·1·0·1·1,indicating that both had a lateral tooth and a marginal tooth. There was a curve on the firside of radulae where the teeth had loose configuration and had obvious phenomenon of abrasion. The lateral tooth morphology of two limpets was very similar： the lateral tooth was falciform,with a strong cusp,almost triangular base and a protuberance. Part of its cusp was thin. However, there were some differences in tooth morphology between the two limpets： C. toreuma had three strong cusps,with the second close to the third. C. grata had two cusps,with the second cusp close to its base. The base of two limpets was almost triangular and had a protuberance. Seventeen parameters were used to measure the radular band and the teeth on the anterior,middle and posterior segment of radular band for comparison. There was obvious difference in the ratio of length to width of radular strip,indicating that the radular band morphology of C. grata was more thinner. There was a certain relationship between these parameters of three segments of radular band： the ratio of middle segment was greater than that of anterior segment, and the ratio of middle segment was greater than that of posterior segment. It was feasible to use radulae as taxonomic basis of C. toreuma and C. grata.

关 键 词：嫁蜮 斗嫁蜮 齿舌 形态比较 

分 类 号：Q954[生物学—动物学]