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Kingdom: Animalia > Phylum: Mollusca > Class: Gastropoda > Order: Cycloneritimorpha > Family: Neritidae > Genus: Theodoxus > Species: Theodoxus transversalis

Theodoxus transversalis (C. Pfeiffer, 1828)

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Quick facts

Threat status Europe	Endangered (IUCN)
Protected by	EU Habitats Directive and 1 other international agreement
Natura 2000 sites	48 are designated for this species
Most preferred habitats	rivers and lakes wetlands
Natura 2000 species code	4064

Distribution

The distribution map is currently disabled. A new map solution will soon become available. In the meantime, please consult other species distribution map providers listed in the Other resources panel below.

Threat and conservation status

IUCN Red List status of threatened species

The IUCN Red List threat status assesses the risk of extinction.

World

Endangered

Europe

Endangered

IUCN Red List Category

Not Evaluated	Near Threatened	Regionally Extinct
Not Applicable	Vulnerable	Extinct in the Wild
Data Deficient	Endangered	Extinct
Least Concern	Critically Endangered

Sources:

EU conservation status

Conservation status assesses every six years and for each biogeographical region the condition of habitats and species compared to the favourable status as described in the Habitats Directive. The map shows the 2013-2018 assessments as reported by EU Member State. Assessments are further detailed in the summary document available behind the link below.

Good: the species is viable and maintaining itself on a long-term basis, its natural range is not reduced, and it has a sufficient large habitat.
Poor: the species is not as critical as being unfavourable-bad, but still requires significant conservation and restoration measure to make it viable in the long-term, or to enlarged its current range, or to improve the quality and availability of its habitat.
Bad: the species is either not maintaining itself on a long-term basis and is not viable, or its natural range as been or is being drastically reduced, or its habitat is largely insufficient; the species requires major conservation and restoration measures.
Unknown: the information available for the species is scarce and does not allow a proper assessment of its conservation status.

Natura 2000 sites

Protected in the following Natura 2000 sites

Sitecode	Country	Site name	Action
DE8041302	Germany	Alz vom Chiemsee bis Altenmarkt	Map
BG0000503	Bulgaria	Reka Lom	Map
BG0000396	Bulgaria	Persina	Map
BG0000232	Bulgaria	Batin	Map
BG0000616	Bulgaria	Mikre	Map
HUHN20001	Hungary	Felső-Tisza	Map
BG0001036	Bulgaria	Balgarski izvor	Map
BG0000282	Bulgaria	Dryanovska reka	Map
BG0000611	Bulgaria	Yazovir Gorni Dabnik	Map
BG0001014	Bulgaria	Karlukovo	Map
HUON20008	Hungary	Rába és Csörnöc-völgy	Map
BG0000335	Bulgaria	Karaboaz	Map
BG0000509	Bulgaria	Tsibritsa	Map
BG0000199	Bulgaria	Tsibar	Map
BG0000613	Bulgaria	Reka Iskar	Map
HUAN20004	Hungary	Hernád-völgy és Sajóládi-erdő	Map
BG0000240	Bulgaria	Studenets	Map
BG0000500	Bulgaria	Voynitsa	Map
BG0000279	Bulgaria	Stara reka	Map
HUAN20003	Hungary	Bódva-völgy és a Sas-patak-völgye	Map
HUON20018	Hungary	Őrség	Map
BG0000608	Bulgaria	Lomovete	Map
BG0000181	Bulgaria	Reka Vit	Map
BG0000280	Bulgaria	Zlatarishka reka	Map
BG0000275	Bulgaria	Yazovir Stamboliyski	Map
BG0000523	Bulgaria	Shishentsi	Map
BG0000518	Bulgaria	Vartopski dol	Map
BG0000213	Bulgaria	Tarnovski visochini	Map
HUDI20026	Hungary	Ipoly völgye	Map
BG0000182	Bulgaria	Orsoya	Map
BG0000615	Bulgaria	Devetashko plato	Map
BG0000517	Bulgaria	Portitovtsi - Vladimirovo	Map
BG0000374	Bulgaria	Bebresh	Map
BG0000247	Bulgaria	Nikopolsko plato	Map
BG0001037	Bulgaria	Pastrina	Map
BG0000614	Bulgaria	Reka Ogosta	Map
BG0000339	Bulgaria	Rabrovo	Map
BG0000281	Bulgaria	Reka Belitsa	Map
BG0000239	Bulgaria	Obnova - Karaman dol	Map
BG0000610	Bulgaria	Reka Yantra	Map
HUFH20011	Hungary	Rába	Map
BG0000216	Bulgaria	Emen	Map
BG0000609	Bulgaria	Reka Rositsa	Map
BG0000432	Bulgaria	Golyama reka	Map
BG0000522	Bulgaria	Vidinski park	Map
BG0000340	Bulgaria	Tsar Petrovo	Map
BG0000336	Bulgaria	Zlatia	Map
BG0000498	Bulgaria	Vidbol	Map

Protected sites

Please note the site map takes a while to display.

Legal status

Mentioned in the following international legal instruments and agreements

Legal text	Annex	More information
Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora - consolidated version 01/01/2007 (EU Habitats Directive)	Annex II: animal and plant species of community interest whose conservation requires the designation of special areas of conservation.	http://ec.europa.eu/environm...rective/index_en.htm
	Annex IV: animal and plant species of community interest in need of strict protection.
Convention on the conservation of European wildlife and natural habitats (Bern Convention)	Revised Annex I of Resolution 6 (1998) of the Bern Convention listing the species requiring specific habitat conservation measures (year of revision 2011)	https://wcd.coe.int/ViewDoc....ckColorLogged=FDC864 Resolution No. 6 (1998) of the Bern Convention lists the species requiring specific habitat conservation measures [and the designation of Areas of Special Conservation Interest (ASCIs) forming for the Emerald network]

Common names and synonyms

The species has no common names

No synonyms available.

Other resources

Fauna Europaea search	Fauna Europaea
GBIF	Global Biodiversity Information Facility
Habitats Directive Art. 17-2006 summary
ITIS search	Interagency Taxonomic Information System
NCBI search	National Center for Biotechnology Information
NOBANIS: Theodoxus transversalis	European Network on Invasive Alien Species
Wikipedia	Wikipedia

External data

Reportnet deliveries

Files delivered through Reportnet with relevance to this species.

6 items found, displaying all items.1

Released	Coverage	Envelope	File
2014-01-07	Hungary	HU_Art_17_report_2013_second round_10_31	HU_species_report_art17
2013-12-27	Bulgaria	BG_habitats_report_2007-2012	Species reports
2013-12-20	Germany	German national report 2013	DE_species_reports.xml
2013-10-11	Austria	Art 17 HD	AT_species_reports-13916-161758.xml
2008-04-10	Germany	German national report	Theodoxus transversalis
2008-03-04	Hungary	delivery_report_art_17_HU	Theodoxus transversalis

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