文献类型：期刊文献

英文题名：Two new species of dugesia (Platyhelminthes, tricladida, dugesiidae) from the tropical monsoon forest in southern China

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

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

年份：2021

卷号：2021

期号：1059

起止页码：89-116

外文期刊名：ZooKeys

收录：Scopus(收录号：2-s2.0-85114949911)

语种：英文

外文关键词：Genetic distance; Karyology; Molecular phylogeny; Monsoon forest; New species; Taxonomy

摘要：Two new species of the genus Dugesia (Platyhelminthes, Tricladida, Dugesiidae) from the tropical monsoon forest in southern China are described on the basis of an integrative taxonomic study involving morphology, karyology, histology, and molecular analyses. The new species Dugesia circumcisa Chen & Dong, sp. nov. is characterised by asymmetrical openings of the oviducts; right vas deferens opening at anterior portion of the seminal vesicle and the left one opening at mid-lateral portion of the seminal vesicle; two diaphragms in ejaculatory duct, the latter being ventrally displaced and opening at the tip of the penis papilla, which is provided with a nozzle; wide duct connecting male atrium and common atrium; chromosome complement triploid with 24 metacentric chromosomes. The other new species, Dugesia verrucula Chen & Dong, sp. nov., is characterised by the large size of the living worm, usually exceeding 3.5 cm in length; asymmetrical openings of the oviducts; subterminal opening of ventrally displaced ejaculatory duct; vasa deferentia symmetrically opening into the postero-lateral portion of the seminal vesicle; well-developed duct between the seminal vesicle and diaphragm; single dorsal bump near the root of the penis papilla; bursal canal with pleated wall and spacious posterior section; unstalked cocoons; chromosome complement diploid with 16 metacentric chromosomes. Inter-specific molecular distances and their positions in the phylogenetic tree reveal that D. circumcisa and D. verrucula are clearly separated from their congeners. ? Lei Wang et al.