Abstract
Two new genera and species of Rhabdocoela from a freshwater lake in Queensland, Australia are described. Austrodalyellia ariena gen. nov. sp. nov. is a member of the Dalyelliidae Graff, 1905. The female system is typical of the family and includes paired finger-like vitellaria, a single ovary, bursa copulatrix and receptaculum seminis. The male system includes paired posterior testes and a copulatory organ with contained vesicula seminalis, vesicula granulorum and a complex stylet. Stylet structure is unique in the family and consists of five layered tines connected by a bifid base. The stylet appears to be derived from forms similar to those of Dalyellia and Microdalyellia. Haplodidymos rubroculatus gen. nov. sp. nov. is a member of the Typhloplanidae Graff, 1905 and characterized by a pair of large red eyes and posterior pharynx rosulatus. The female system includes paired vitellaria, a single ovary, bursa copulatrix, receptaculum seminis and uterus. The male system is characterized by the unique presence of a single, long testis that runs medially and ventral to the gut. Posterior to the pharynx it connects with a copulatory organ that houses a well-defined vesicula seminalis, ill-defined vesicula granulorum, and weakly sclerotic stylet. Haplodidymos is placed in the Protoplanellinae based on the ventral position of the testes and the absence of excretory pores in the mouth.References
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