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Fukuda, H.; Ponder, W. F. (2005). A revision of the Australian taxa previously attributed to Assiminea buccinoides (Quoy & Gaimard) and Assiminea tasmanica Tenison-Woods (Mollusca: Gastropoda: Caenogastropoda: Assimineidae). Invertebrate Systematics. 19(4): 325-360.
130714
10.1071/is04009 [view]
Fukuda, H.; Ponder, W. F.
2005
A revision of the Australian taxa previously attributed to Assiminea buccinoides (Quoy & Gaimard) and Assiminea tasmanica Tenison-Woods (Mollusca: Gastropoda: Caenogastropoda: Assimineidae)
Invertebrate Systematics
19(4): 325-360
Publication
A new genus, Cryptassiminea, is introduced for the taxon previously known as Assiminea buccinoides (Quoy & Gaimard). These small gastropods are abundant in mangrove and salt marsh habitats in south-eastern and subtropical eastern Australia. Seven species (five new) are recognised using morphological characters in the complex previously treated as a single species. Five taxa have rather narrow ranges while the other two are widespread and often sympatric. Two groups of species are recognised. One contains Cryptassiminea buccinoides, widespread in south-east and east Australia, and two closely related allopatric taxa from South Australia and south-eastern Tasmania (C. adelaidensis, sp. nov. and C. kershawi, sp. nov.). A second group of species is typified by Cryptassiminea tasmanica (Tenison-Woods), also widespread in east and south-east Australia and often sympatric with C. buccinoides. Allied to C. tasmanica, are two closely related taxa from western Victoria: C. glenelgensis, sp. nov. from the Glenelg River estuary and C. surryensis, sp. nov. from the Surry River estuary and Western Port, in the vicinity of Geelong. A distinctive species, Cryptassiminea insolata, sp. nov. from the east coast of Queensland, also has similarities with C. tasmanica. A cladistic analysis using morphological characters of the Cryptassiminea taxa and three other genera of Assimininae, with an omphalotropidine as the outgroup, resulted in a single tree. The new genus has rather poor support, possibly because many of its characters appear to be plesiomorphic within Assimineinae. Cryptassiminea is defined by a unique combination of characters but lacks any obvious synapomorphy. Two clades within Cryptassiminea are well supported, each containing the species-groups referred to above.
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