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

Theodoxus transversalis (C. Pfeiffer, 1828)

Images from the web

Quick facts

Threat status Europe Endangered (IUCN)
EU conservation status by biogeographical region Continental - Bad
Pannonian - Poor
Protected by EU Habitats Directive and 1 other international agreement
Natura 2000 sites 47 are designated for this species
Most preferred habitats
  • rivers and lakes
  • wetlands
Natura 2000 species code 4064


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.

IUCN Red List Category
Not Evaluated
Near Threatened
Regionally Extinct
Not Applicable
Extinct in the Wild
Data Deficient
Least Concern
Critically Endangered

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.

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
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.

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
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Phone: +45 3336 7100