Redescription ofUnio tumidiformisCastro, 1885 (Bivalvia, Unionidae), an endemism from the south-western Iberian Peninsula
- 22 July 2009
- journal article
- research article
- Published by Informa UK Limited in Journal of Natural History
- Vol. 43 (31-32), 1929-1945
- https://doi.org/10.1080/00222930902993724
Abstract
The possible occurrence of Unio crassus Philipsson, 1788 on the Iberian Peninsula has been a controversial issue since the nineteenth century. Several characters, including molecular, morphological and life cycle, show that the Iberian taxon is related to, but well differentiated from, the central European U. crassus. The valid name for this Iberian taxon is Unio tumidiformis Castro, 1885 Castro, JS . 1885. Unionidae nouveaux du Portugal. Bull Soc Malacol France., 2: 277–294. [Google Scholar] . Live populations are distributed throughout the Guadiana, Mira and Sado river basins. Unio tumidiformis can be distinguished from other Unio species by its regular oval shape, high relative height and width, strong wavy umbonal rugae, supra-cardinal tooth on the right valve, and lower glochidium height. From the potential fish hosts tested, only Squalius alburnoides (Steindachner, 1866) resulted in juvenile drop-off, suggesting some degree of specialization in the parasite–host relationship. The endemic nature, population status and habitat of U. tumidiformis make this species important from a conservation point of view.Keywords
This publication has 19 references indexed in Scilit:
- Redescription ofUnio gibbusSpengler, 1793, A West Palaearctic Freshwater Mussel with Hookless GlochidiaMalacologia, 2009
- Palaeoheterodont diversity (Mollusca: Trigonioida + Unionoida): what we know and what we wish we knew about freshwater mussel evolutionZoological Journal of the Linnean Society, 2006
- Temporal and spatial distribution of glochidial larval stages of European unionid mussels (Mollusca: Unionidae) on host fishesFolia Parasitologica, 2006
- Unusual spurting behaviour of the freshwater mussel Unio crassusJournal of Molluscan Studies, 2005
- The identity and biology of unio mancus laMarck, 1819 (=U. Elongatulus) (bivalvia: unionidae) in the Iberian PeninsulaJournal of Molluscan Studies, 2005
- The freshwater pearl mussel [Margaritifera margaritifera (L.)] (Bivalvia, Unionoida) rediscovered in Portugal and threats to its survivalBiological Conservation, 2003
- GILL EVACUATION AND RELEASE OF GLOCHIDIA BY UNIO PICTORUM AND UNIO TUMIDUS (BIVALVIA: UNIONIDAE) UNDER THERMAL AND HYPOXIC STRESSJournal of Molluscan Studies, 2003
- Catálogo de los Uniónidos (Mollusca, Unionidae) de la península Ibérica conservados en el Museo Nacional de Ciencias Naturales (CSIC)Graellsia, 2001
- The Morphology, Growth and Reproduction of Unionidae (Bivalvia) in a Fenland WaterwayJournal of Molluscan Studies, 1999
- Biogeographical regions of the Iberian peninsula based on freshwater fish and amphibian distributionsEcography, 1998