Theodoxus danubialis (C. Pfeiffer 1828)
- Dataset
- The freshwater molluscs of Serbia: Annotated checklist with remarks on distribution and protection status
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Gastropoda
- order
- Cycloneritimorpha
- family
- Neritidae
- genus
- Theodoxus
- species
- Theodoxus danubialis
description
Findings in Serbia.
description
Morphology. Medium-sized species (shell up to 15 mm). Shell is oval shaped and brightly coloured, usually with dark zigzag pattern. Sometimes shell colouring can be uniformly black. Operculum is yellowish, with apophysis and pseudoapophysis. For more details see Glöer (2019: 40, figs 24, 25).
distribution
Distribution and ecology. Species native to the Danube basin, found in northern Italy as well. The snail prefers hard substrate of large and medium-sized rivers at lower attitudes (Welter-Schultes 2012; Marković et al. 2014). In Serbia, the most numerous populations are found in the Danube and Sava Rivers tributaries such as Drina, Velika Morava, Mlava, Nišava and Timok Rivers. Other remarks. The spread of competitive alien and invasive species in the 21 st century, alongside with general habitats deterioration, could be the main cause of decreasing population trends of this species. The snail is considered as critically endangered in northern parts of its distribution area (Germany, Austria, Czech Republic) (Welter-Schultes, 2012). The species has LC status on the IUCN Red List (Tomović et al. 2010).
Name
- Synonyms
- Nerita danubialis var. carinata Clessin 1887
- Neritina danubialis var. stragulata Clessin 1887
- Neritina stragulata Mollendorff 1873
- Theodoxus danubialis subsp. carinatus Ehrmann 1933
- Theodoxus danubialis subsp. stragulata : Grossu 1956
- Theodoxus danubialis var. stragulata : Grossu 1956
- Homonyms
- Theodoxus danubialis (C. Pfeiffer 1828)