文献类型：期刊文献

英文题名：Integrative descriptions of two new species of dugesia from hainan island, china (Platyhelminthes, tricladida, dugesiidae)

作者：Wang L.; Dong Z.-M.; Chen G.-W.; Sluys R.; Liu D.-Z.

机构：[1]College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, China;[2]Naturalis Biodiversity Center, Leiden, Netherlands;[3]Medical College, Xinxiang University, Xinxiang, 453003, China

第一机构：College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, China

通讯机构：[1]College of Life Science, Henan Normal University, Xinxiang, Henan, 453007, China

年份：2021

卷号：2021

期号：1028

起止页码：1-28

外文期刊名：ZooKeys

收录：Scopus(收录号：2-s2.0-85104755194)

语种：英文

外文关键词：Histology; Karyology; Molecular distance; Molecular phylogeny; Taxonomy

摘要：Two new species of the genus Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from Hainan Island of China are described on the basis of morphological, karyological and molecular data. Dugesia semiglobosa Chen & Dong, sp. nov. is mainly characterized by a hemispherical, asymmetrical penis papilla with ven-trally displaced ejaculatory duct opening terminally at tip of penis papilla; vasa deferentia separately opening into mid-dorsal portion of intrabulbar seminal vesicle; two diaphragms in the ejaculatory duct; copula-tory bursa formed by expansion of bursal canal, lined with complex stratified epithelium, which projects through opening in bursa towards intestine, without having open communication with the gut; mixoploid chromosome complement diploid (2n = 16) and triploid (3n = 24), with metacentric chromosomes. Dug-esia majuscula Chen & Dong, sp. nov. is mainly characterized by oviducts opening asymmetrically into female reproductive system; hyperplasic ovaries; expanded posterior section of bursal canal; vasa deferentia separately opening into mid-dorsal portion of seminal vesicle; asymmetrical penis papilla due to ventral course of ejaculatory duct, which has subterminal and dorsal opening at tip papilla; mixoploid chromosome complement diploid (2n = 16) and triploid (3n = 24); chromosomes metacentric. Apart from their anatomy, separate species status of the two new species is supported also by their genetic distances and by their positions in the phylogenetic tree. The sexualization process may have been induced by the lower tem-peratures, in comparison with their natural habitat, under which the worms were cultured in the laboratory. ? Lei Wang et al.