Towards disentangling the classification of freshwater fish trypanosomes  

作　　者：Peng Zhang Jie Liu Xiao‑Ming Yin Jun‑Yu Zhou Julius Lukeš Zhao‑Rong Lun De-Hua Lai 

机构地区：[1]Guangdong Provincial Key Laboratory of Aquatic Economic Animals,State Key Laboratory of Biocontrol,School of Life Sciences,Sun Yat-sen University,Guangzhou 510275,China [2]BGI Genomics,BGI-Shenzhen,Shenzhen 518083,China [3]Institute of Parasitology,Biology Centre,Czech Academy of Sciences,ČeskéBudějovice(Budweis)37005,Czech Republic [4]Biomedical Research Centre,School of Science,Engineering and Environment,University of Salford,Salford M54WT,UK

出　　处：《Marine Life Science & Technology》2023年第4期551-563,共13页海洋生命科学与技术（英文）

基　　金：supported by the National Natural Science Foundation of China(32170470,31720103918 to ZRL,32270446 to DHL);Natural Sciences Foundation of Guangdong Province(2022A1515011874 to DHL);Science and Technology Projects in Guangzhou(202201011831);the Czech Grant Agency 22-01026S to JL.

摘　　要：Currently,new species of freshwater fish trypanosomes,which are economically important parasites,are being described based on subjectively selected features,i.e.,their cell morphology and the host species.We have performed detailed phylogenetic and haplotype diversity analyses of all 18S rRNA genes available for freshwater fish trypanosomes,including the newly obtained sequences of Trypanosoma carassii and Trypanosoma danilewskyi.Based on a sequence similarity of 99.5%,we divide these trypanosomes into 15 operational taxonomic units,and propose three nominal scenarios for distinguishing T.carassii and other aquatic trypanosomes.We find evidences for the existence of a low number of freshwater fish trypanosomes,with T.carassii having the widest geographic and host ranges.Our analyses support the existence of an umbrella complex composed of T.carassii and two sister species.

关 键 词：Freshwaterfish trypanosomes 18S rRNA MORPHOLOGY PHYLOGENY 

分 类 号：Q958.9[生物学—动物学]