台灣內水域新紀錄一種蛭蚓類及四種貧毛類

New Records of a Branchiobdellidan and Four Microdrile Oligochaetes (Annelida: Clitellata) from Inland Waters of Taiwan

本研究描述1種台灣新紀錄的蛭蚓類Holtodrilus truncatus （Clitellata, Branchiobdellida），其宿主除已知的Neocaridina spp.外，首次發現亦寄宿在與Neocaridina spp.共域棲息的Caridina pseudodenticulata （Decapoda, Atyidae），因此H. truncatus 並無宿主專一性。另外亦採集到8種自由營生性的貧毛類，其中4種Nais pardalis、Pristina proboscidea、Pristina amphibiotica及Aulodrilus japonicus爲台灣新紀錄種。

In addition to known host Neocaridina spp., this paper reports the first record of the ectosymbiont branchiobdellidan Holtodrilus truncatus (Clitellata: Branchiobdellida) on Caridina pseudodenticulata (Decapoda: Atyidae) from Taiwan. Both host shrimp species occurred sympatrically at collection sites, suggesting that H. truncatus has no species specific preference for host. Eight species of free-living microdrile oligochaetes were also collected from the collection sites. Of these, four species, Nais pardalis, Pristina proboscidea, Pristina amphibiotica and Aulodrilus japonicus, are new records to Taiwan.