On four epibiotic peritrichous ciliates(Protozoa,Ciliophora)found in Lake Weishan Wetland:morphological and molecular data support the establishment of a new genus,Parapiosoma gen.nov.,and two new species  

作　　者：Tong Wu Ting Cheng Xiao Cao Yaohan Jiang Khaled A.S.Al-Rasheid Alan Warren Zhe Wang Borong Lu 

机构地区：[1]Marine College,Shandong University,Weihai 264209,China [2]Institute of Evolution and Marine Biodiversity,Ocean University of China,Qingdao 266003,China [3]Zoology Department,College of Science,King Saud University,Riyadh 11451,Saudi Arabia [4]Department of Life Sciences,Natural History Museum,London SW75BD,UK [5]Weishan Fishery Development Service Center,Jining 277600,China

出　　处：《Marine Life Science & Technology》2023年第3期337-358,共22页海洋生命科学与技术（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Project numbers:32030015,32000300);the Natural Science Foundation of Shandong Province(Project number:ZR2021QC104,ZR2022QC096);China Postdoctoral Science Foundation(Project numbers:2021M701993,2022M711922);the King Saud University,Saudi Arabia(Project number RSP2023R10).We sincerely thank the“Weishan Wetland Station”for institutional support.

摘　　要：During a study on the diversity of ciliated protists in Lake Weishan Wetland,the largest wetland in northern China,four epibiotic sessilid peritrichs were isolated from aquatic host animals.Two of them,i.e.,Epistylis cambari Kellicott,1885 and Epistylis lwof Fauré-Fremiet,1943,were known species whereas the other two,i.e.,Parapiosoma typicum gen.nov.,sp.nov.and Orborhabdostyla gracilis sp.nov.,are new to science.The new genus Parapiosoma gen.nov.is characterized by its branched non-contractile stalk,everted peristomial lip,obconical macronucleus and transverse silverlines.Two species are assigned to the new genus,namely Parapiosoma typicum sp.nov.and Parapiosoma gasterostei(Fauré-Fremiet,1905)comb.nov.Morphologically,P.typicum sp.nov.is recognized by its goblet-shaped zooids,single-layered peristomial lip,dichotomously branched stalk,and infundibular polykinety 3(P3)containing three equal-length rows.Orborhabdostyla gracilis sp.nov.is characterized by its slender zooid,curved macronucleus,and three equal-length rows in infundibular P3.Improved diagnoses and redescriptions of E.cambari and E.lwof are provided including,for the frst time,data on the ciliature of E.cambari.Phylogenetic analyses based on SSU rDNA,ITS1-5.8S rDNA-ITS2,and LSU rDNA sequence data strongly support the assertion that the family Epistylididae comprises morphospecies with diferent evolutionary lineages and indicate that Parapiosoma gen.nov.may represent a new taxon at family level.

关 键 词：ECTOPARASITE Parapiosoma gen.nov. Sessilid peritrichs Systematics 

分 类 号：Q958[生物学—动物学]