Abstract
A new species of Dalyelliidae, Gieysztoria queenslandica, is described from a freshwater lake in Brisbane, Queensland, Australia. Gieysztoria queenslandica n. sp. is a member of the Aequales group of Gieysztoria and differs from its congeners by possession of an S-shaped ovary, a Y-shaped oviduct leading to a separate receptaculum seminis, and the shape and size of the male copulatory organ. The sclerotic male organ of G. queenslandica is characterized by 27-32 broad, dagger-like spines arising from a hollow crescent-shaped girdle. The new species is seasonally abundant (April- July) in an artificial lake present on the St. Lucia campus of the University of Queensland in Brisbane, Australia.
References
Cannon, L.R.G. (1986) Turbellaria of the World. A Guide to Families & Genera. Queensland Museum, Australia, 136 pp.
Cannon, L.R.G. (1991). Temnocephalan symbionts of the freshwater crayfish Cherax quadricarinatus from northern Australia. Hydrobiologia, 227, 341-347.
Luther, A. (1955) Die Dalyelliden (Turbellaria, Neorhabdocoela), eine monographie. Acta Zoologica Fennica, 87, 1-337.
Hartenstein, V. & Dwine, K.A. (2000) Freshwater Dalyellid flatworm, Gieysztoria superba sp. nov. (Dalyellidae: Rhabdocoela) from southeast Queensland, Australia. Memoirs of the Queensland Museum, 45, 383-383.
Kolasa, J. & Schwartz, S.S. (1988) Two new Mesostoma species (Turbellaria, Rhabdocoela) from Australia. Zoologica Scripta, 17, 329-335.
Mack-Fira,V. (1968) Dalyelliidae (Turbellaria, Rhabdocoela) din România. Studii si cercetar de Biologie Seria Zoologie, 20, 527-534.
Marcus, E. (1946) Sobre Turbellaria Brasileiros. Zoologia, 11, 5-254.
Noreña-Janssen, C. (1995) Studies of the taxonomy and ecology of the Turbellaria (Plathelminthes) in the floodplain of the Paraná river (Argentina). II. Taxonomy and ecology of the Turbellaria. Archives für Hydrobiologie, 107, 21-262.
Sluys, R. & Rhode, K. (1991) A new species of freshwater triclad (Platyhelminthes: Tricladida) from Australia. Zoological Journal of the Linnean Society, 102, 153-62.
Rohde, K., Cannon, L.R.G., & Watson, N. (1988) Ultrastructure of the flame bulbs and protonephridial capillaries of Gieysztoria sp. (Rhabodcoela Dalyelliida), Rhinolasius sp. (Rhabodcoela Kalyptorhynchia) and Actinodactyella blanchardi (Rhabdocoela Temnocephalida). Journal of Submicroscopic Cytology and Pathology, 20, 605-612.
Watson, N. & Rohde, K. (1995) Ultrastructure of spermiogenesis and spermatozoa in the platyehelminths Actinodactyella blanchardi (Temoncephalida, Actinodactyellidae), Didymorchis sp. (Temnocephalida, Didymorchidae) and Gieysztoria sp. (Dalyelliida, Dalyelliidae), with implications for the phylogeny of the Rhabdocoela. Invertebrate Reproduction and Development, 27, 145-158.
Young, J.O. (1976) The freshwater Turbellaria of the African continent. Zoologischer Anzeiger, 197, 419-432.
Young, J.O. (1977) Six new species and records of two established species of Dalyelliidae (Turbellaria: Neorhabdocoela) from freshwater habitats in Kenya, East Africa. Journal of Natural History, 11, 1-15.