title: Two new species of Gieysztoria (Platyhelminthes, Rhabdocoela, Dalyelliidae) from a freshwater artificial lake in Shenzhen, China.
abstract: Two new species of the "Aequales" of genus Gieysztoria were collected and described from an artificial lake on the Shenzhen University campus. Gieysztoria bimaculata n. sp., is distinguished based on two groups clavate pigmentations dorsally between the pharynx and intestine, and has a sclerotic stylet comprising a proximal girdle with 40-46 distal dagger-shape spines, thus has the maximum number of spines within "Aequales" group. Gieysztoria guangdongensis n. sp. has a sclerotic stylet with a proximal girdle and 18 distal blade-shaped spines. Comparison with similar species based mainly on stylet morphology suggests that Gieysztoria bimaculata n. sp. and Gieysztoria guangdongensis n. sp. are apparently different from the known species of Gieysztoria in this moment. In addition, the stability of the amount of distal spines of "Aequales" species is briefly discussed.
authors.affiliation: College of Life Science, Shenzhen University, Shenzhen 518060, China; Email: unknown.
authors.forename: Yan-Hong
authors.initials: YH
authors.lastname: Lu
authors.affiliation: Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029, China; Email: unknown.
authors.forename: Cheng-Chen
authors.initials: CC
authors.lastname: Wu
authors.affiliation: College of Life Science, Shenzhen University, Shenzhen 518060, China; Email: unknown.
authors.forename: Xiao-Jie
authors.initials: XJ
authors.lastname: Xia
authors.affiliation: College of Life Science, Shenzhen University, Shenzhen 518060, China; Email: wang118@szu.edu.cn.
authors.forename: An-Tai
authors.initials: AT
authors.lastname: Wang
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology; D000818:Animals; D002681:China; D017753:Ecosystem; D005260:Female; D060106:Lakes; D008297:Male; D010986:Platyhelminths / Q000033:anatomy & histology / Q000145:classification*