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曼氏血吸虫宿主藁杆双脐螺与几种扁蜷螺形态解剖学比较
周幼杨1, 谢广龙1, 周春花1, 欧阳珊1, 吴小平1,2
1.南昌大学 生命科学学院;2.南昌大学 生命科学研究院流域生态研究所
摘要:
曼氏血吸虫中间宿主螺藁杆双脐螺和其他3种隶属扁蜷螺科的吸虫及线虫中间宿主螺, 其形态极为相似, 缺乏分类学资料, 比较几种扁蜷螺的形态及生殖系统构造, 明确其分类学特征, 能为监测及防控部门准确鉴定物种提供依据。电子数显卡尺测量所有样本螺壳参数; 解剖4种扁蜷螺生殖系统并绘图; 扫描电镜观察齿舌形态。方差分析表明, 4种扁蜷螺壳高(H)和直径(D)比值差异显著(F=64.171,P<0.01)。4种扁蜷螺齿舌均为中央齿1列, 双齿型, 但中央齿齿尖形态、侧齿及缘齿列数、齿尖数量及形态等依种类不同均有差异。研究结果表明不同种的齿舌形态是重要鉴别特征之一。生殖系统阴茎复合体构造在属间差异明显, 种间较为相似(旋螺属的凸旋螺、小旋螺)。尽管4种扁蜷螺贝壳形态较为相似, 但壳高(H)和直径(D)比值、齿舌列数、齿尖以及生殖系统的阴茎复合体构造等特征, 对入侵物种藁杆双脐螺和中国几种常见扁蜷螺的准确鉴定有重要价值。
关键词:  扁蜷螺Planorbidae  藁杆双脐螺(Biomphalaria straminea)  曼氏血吸虫(Schistosoma mansoni)  形态特征  生殖系统
DOI:10.11759/hykx20170609002
分类号:
基金项目:国家重点研发计划项目(2016YFC1202000)
Comparison of morphological and anatomical characteristics of Biomphalaria straminea of intermediate hosts of Schistosoma mansoni and several species of Planorbidae
ZHOU You-yang,XIE Guang-long,ZHOU Chun-hua,OUYANG Shan,WU Xiao-ping
Abstract:
The four Planorbidae species are intermediate hosts of Trematoda and Nematoda, and the invasive species Biomphalaria straminea is an intermediate host of Schistosoma mansoni. Due to reports that the shell characteristics of these species are closely similar to each other and the taxonomic data of these species are incomplete, comparing the shell, radulae, and reproductive system of the four Planorbidae species can provide the basis of accurate identification of these species for Sanitation and Anti-epidemic Department. In this study, the electronic digital caliper was used to; measure the shells parameters of all the samples, dissect and draw the reproductive system of the four Planorbidae species, and observe the morphology of radula by electron microscopy. The analysis of variance (ANOVA) showed that the mean ratios between the height (H) and diameter (D) of the shell (H/D) of the four species of Planorbidae were significantly different (F = 64.171, P <0.01). All of the radula of the four species of Planorbidae have one central tooth with two other sharp teeth, but the shape of the central tooth, the number of columns of lateral tooth and marginal tooth, and the shape and number of sharp teeth are different in each species, which is one of the important species identification features. There were significant differences in the structure of the penile complex of the reproductive system at the Genus level but they were similar in the interspecies level (Gyraulus convexiusculus and Gyraulus parvus). Although the morphology of the shells in the four Planorbidae species is similar, the mean ratios between the height (H) and diameter (D) of the shell, the number of columns and structure of radula, and the structure of penial complex of the reproductive system have important value for accurate identification of invasive species B. straminea and several common Planorbidae species in China.
Key words:  Planorbidae  Biomphalaria straminea  Schistosoma mansoni  Morphological Characteristics  Reproductive System
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