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

Abstract

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.