Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Gastropoda
Subclassis: Neritimorpha
Ordo: Cycloneritida
Superfamilia: Neritoidea
Familia: Neritidae
Subfamilia: Neritinae
Tribus: Theodoxini
Genus: Theodoxus
Species: T. anatolicus – T. baeticus – T. cariosa – T. corona – T. danubialis – T. euxinus – – T. gurur – T. jordani – T. karasuna – T. meridionalis – T. mutinensis – T. neglectus – T. olivaceus – T. pallasi – T. prevostianus – T. retropictus – T. saulcyi – – T. valentinus – T. velox – T. vespertinus – T. wesselinghi – T. wilkei –T. transversalisT. fluviatilis
Name
Theodoxus Montfort, 1810
Genus names in synonymy
Theodoxus (Clithon) = Clithon Montfort, 1810
References
Montfort P.D. de 1810. Conchyliologie systématique et classification méthodique des coquilles. Schoell: Paris. Volume 2: 676 pp. + 16 pl. Reference page.
Marković, V., Vujić, V., Ilić, M., Tomović, J., Nikolić, V. & Karan-Žnidaršič, T. 2019. Operculum shape variation in Theodoxus Montfort, 1810 (Gastropoda: Neritidae). Zootaxa 4560(3): 563–575. DOI: 10.11646/zootaxa.4560.3.8 Paywall Reference page.
Sands, A.F., Glöer, P., Gürlek, M.E., Albrecht, C. & Neubauer, T.A. 2020. A revision of the extant species of Theodoxus (Gastropoda, Neritidae) in Asia, with the description of three new species. Zoosystematics and Evolution, 96(1): 25–66. DOI: 10.3897/zse.96.48312 Open access Reference page.
Links
Theodoxus – Taxon details on Integrated Taxonomic Information System (ITIS).
Theodoxus is a genus of nerites, small water snails with an operculum, some of which live in freshwater, and some in both freshwater and brackish water, aquatic gastropod mollusks in the family Neritidae, the nerites.[2]
Distribution
The distribution of the genus Theodoxus includes Europe and northern Africa and also extends east to southern Iran.[3] No other species within Neritidae have sympatrical distribution with Theodoxus.[4] The distribution of the genus Theodoxus is an exception within Neritidae, because Neritidae live primarily in the southern hemisphere.[4] Species within Theodoxus are the only Neritidae snails, that live in temperate climate.[4]
Bunje & Lindberg (2007) presented the first phylogenetic hypothesis of the clade Theodoxus.[4] The evolution of the genus Theodoxus was affected by separating of Mediterranean Sea and Paratethys sea in Miocene.[4]
Description
Representative row of radula teeth of T. fluviatilis
The shell in this genus is semiovular with a flat apertural plain. There is no umbilicus. The columella and inner whorls are dissolved.[3]
Species in the genus Theodoxus are highly variable in size, in color pattern of the periostracum, in details of the operculum and in the radula, and all these factors can make identification to species level very challenging.[5]
Ecology
These animals live on stones, and often also under stones, in up to 5–6 m depth or deeper, feeding on algal covers.[3] Theodoxus needs rough surfaces in order to be able to digest its food, so a stony substrate is necessary.[3] Green algae[clarification needed] are not consumed; Theodoxus has no cellulases.[3] These snails lay egg capsules containing 30-70 eggs each, usually on the shells of other Theodoxus animals; only one juvenile grows, the other eggs serve as food.[3]
Species
There were no systematic review of the genus Theodoxus as of 2007.[4] Bunje (2004) noted at least 34 extant taxa at species level in the genus Theodoxus. IUCN Red List (2015) provided conservation status for 23 species of Theodoxus.[6]
Species within the genus Theodoxus include:
Subgenus Brusinaella Andrusov, 1912[7]
† Theodoxus petasatus (Seninski, 1905)
Subgenus Calvertia Bourguignat, 1880[8]
† Theodoxus acuticarinatus (Fuchs, 1870)
† Theodoxus amblygonioides Wenz, 1930
† Theodoxus amethystinus (Brusina, 1874)
† Theodoxus anconae (Capellini, 1880)
† Theodoxus angularis Gozhik, 2002
† Theodoxus anonymus Anistratenko & Gozhik, 1995
† Theodoxus atticus Kühn, 1963
† Theodoxus barakovici (Brusina, 1902)
† Theodoxus bessarabicus (Sinzov, 1896)
† Theodoxus brusinai (Pavlović, 1931)
† Theodoxus capellinii (Pantanelli, 1876)
† Theodoxus capillaceus (Brusina, 1874)
† Theodoxus crescens (Fuchs, 1870)
† Theodoxus doderleini (d'Ancona, 1869)
† Theodoxus dumortieri (Fontannes, 1878)
† Theodoxus fasciatus Gozhik in Gozhik & Datsenko, 2007
† Theodoxus gnezdai (Brusina, 1884)
† Theodoxus grateloupianus (Férussac, 1823)
† Theodoxus hoernesanus (Semper, 1867)
† Theodoxus ingulenzis Gozhik in Gozhik & Datsenko, 2007
† Theodoxus kalodictya (Andrusov, 1909)
† Theodoxus koslinskyi (Porumbaru, 1881)
† Theodoxus lamellatus (Brusina, 1892)
† Theodoxus lineatus (Sinzov, 1896)
† Theodoxus lorkovici (Brusina, 1878)
† Theodoxus macedonicus Wenz, 1943
† Theodoxus maculosus Gozhik in Gozhik & Datsenko, 2007
† Theodoxus mayeri (Semper, 1867)
† Theodoxus militaris (Neumayr, 1869)
† Theodoxus miljkovici (Brusina, 1902)
† Theodoxus millepunctatus (Brusina, 1902)
† Theodoxus moeschi Locard, 1893
† Theodoxus morulus Kühn, 1963
† Theodoxus mutinensis (d'Ancona, 1869)
† Theodoxus neumayri (Burgerstein, 1877)
† Theodoxus nitens Gozhik, 2002
† Theodoxus nivosus (Brusina, 1874)
† Theodoxus novorossicus (Sinzov, 1896)
† Theodoxus obtusangulaeformis Gozhik, 2002
† Theodoxus oxytropida (Andrusov, 1909)
† Theodoxus pavlovici Milošević, 1983
† Theodoxus philippianus Locard, 1883
† Theodoxus pilari (Brusina, 1884)
† Theodoxus platystoma (Brusina, 1874)
† Theodoxus pseudodanubialis (Sinzov, 1896)
† Theodoxus pseudofluviatilis Locard, 1893
† Theodoxus pseudograteloupanus (Sinzov, 1884)
† Theodoxus radmanesti (Fuchs, 1870)
† Theodoxus radovanovici (Brusina, 1893)
† Theodoxus reiseri (Brusina, 1902)
† Theodoxus rugosus (Pavlović, 1931)
† Theodoxus sagittiferus (Brusina, 1874)
† Theodoxus schachmaticus (Andrusov, 1909)
† Theodoxus scoliogramma (Brusina, 1884)
† Theodoxus semidentatus (Sandberger, 1875)
† Theodoxus serrulatus (Brusina, 1892)
† Theodoxus slavonicus (Brusina, 1878)
† Theodoxus sophievkaensis Gozhik in Gozhik & Datsenko, 2007
† Theodoxus stanae (Brusina, 1893)
† Theodoxus stefanescui (Fontannes, 1887)
† Theodoxus stefanescuiformis Gozhik in Gozhik & Datsenko, 2007
† Theodoxus subquadrofasciatus Gozhik, 2002
† Theodoxus subslavonicus Gozhik, 2002
† Theodoxus sundicus (Andrusov, 1909)
† Theodoxus suskalovici (Pavlović, 1903)
† Theodoxus sycophantus (Brusina, 1878)
† Theodoxus tropidophorus (Brusina, 1884)
† Theodoxus turbinatus (Fuchs, 1870)
† Theodoxus veljetinensis (Pavlović, 1903)
† Theodoxus venustus (Brusina, 1897)
† Theodoxus xanthozona (Brusina, 1884)
† Theodoxus zagradovkaensis Gozhik, 2002
† Theodoxus zivkovici (Pavlović, 1903)
Subgenus Neritonyx Andrusov, 1912[9]
† Theodoxus unguiculatus (Seninski, 1905)
Subgenus Ninniopsis Tomlin, 1930[10]
† Theodoxus colchicus (Andrusov, 1912)
Subgenus Neritaea Roth, 1855[11]
Theodoxus anatolicus (Récluz, 1841)[12][13][14]
† Theodoxus groyanus (Férussac, 1823)
Theodoxus jordani (Sowerby)[14]
† Theodoxus micans (Gaudry & Fischer in Gaudry, 1867)
Theodoxus niloticus (Reeve, 1856)[14] - synonym: Theodoxus africanus (Reeve, 1856)[15]
† Theodoxus subdoricus Schütt, 1976
Theodoxus subterrelictus Schütt, 1963[12][13]
Theodoxus peloponensis (Récluz, 1841)
Theodoxus varius (Menke, 1828)[12][13]
Subgenus Theodoxus Montfort, 1810
Theodoxus altenai Schütt, 1965[12][14]
Theodoxus baeticus (Lamarck, 1822)[12][16]
† Theodoxus becenensis (Cobălcescu, 1883)
† Theodoxus brenneri (Handmann, 1882)
† Theodoxus carasiensis Jekelius, 1944
† Theodoxus constantiae Stefanescu, 1896
† Theodoxus culceri (Porumbaru, 1881)
† Theodoxus cyrtocelis (Krauss, 1852)
Theodoxus danubialis (Pfeiffer, 1828)[12][16][14]
† Theodoxus denisluensis (Oppenheim, 1919)
† Theodoxus deperditus (Almera, 1894)
† Theodoxus elongatulus (Philippi, 1844) [12][16]
† Theodoxus eugenii Jekelius, 1944
Theodoxus euxinus (Clessin, 1886)[12][16][17]
Theodoxus fluviatilis (Linnaeus, 1758)[12][16] - type species.[18] synonyms: Theodoxus brauneri (Lindholm, 1908)[18] (but as separate species per[12][16]); Theodoxus brauneri f. lacrymans Lindholm, 1908;[18] Theodoxus brauneri f. alboguttata Lindholm, 1908;[18] Theodoxus brauneri f. pulherrima Lindholm, 1908;[18] Theodoxus lutetianus Montfort, 1810.[3] Bunje (2005)[19] does not consider Theodoxus velox Anistratenko, 1999[20][17] to be a distinct species from Theodoxus fluviatilis.[19][14][17]
† Theodoxus gregarius (Thomä, 1845)
Theodoxus heldreichi (Martens, 1879)[12][14]
† Theodoxus hisingeri (Bellardi & Michelotti, 1841)
Theodoxus hispalensis (Martens, 1879)[12][16]
† Theodoxus jekeliusi Jurišić-Polšak, 1979
† Theodoxus leobersdorfensis (Handmann, 1887)
Theodoxus meridionalis (Philippi, 1836)[12][21][16]
† Theodoxus milessii Papp, 1979
† Theodoxus moosbrunnensis Papp, 1953
† Theodoxus morellii (Bellardi & Michelotti, 1841)
Theodoxus pallasi Lindholm, 1924[22][12][16][17] - synonym: Theodoxus lituratus (Eichwald, 1838)[22]
† Theodoxus pilidei (Tournouër, 1879)
Theodoxus prevostianus (Pfeiffer, 1828)[12][16][14][23]
† Theodoxus punctatolineatus (Sinzov, 1896)
Theodoxus saulcyi (Bourguignat, 1852)[12][16]
† Theodoxus scamandrius (Calvert & Neumayr, 1880)
† Theodoxus semiplicatus (Neumayr in Herbich & Neumayr, 1875)
† Theodoxus simplex (Fuchs, 1877)
† Theodoxus subglobosus (Eichwald, 1853)
Theodoxus subthermalis (Bourguignat in Issel, 1865)[17] or Theodoxus fluviatilis subthermalis Issel, 1865[16]
Theodoxus transversalis (Pfeiffer, 1828)[12][16][14]
† Theodoxus trifasciatus (Grateloup, 1839)
† Theodoxus turislavicus Jekelius, 1944
Theodoxus valentinus (Graells, 1846)[12][16]
† Theodoxus zografi (Brusina, 1902)
Subgenus ?
† Theodoxus abnormis (Jenkins, 1864)
† Theodoxus almelae (Revilla, 1958)
Theodoxus astrachanicus Starobogatov, 1994[22][17]
† Theodoxus banaticus Jekelius, 1944
† Theodoxus bohotinensis (Simionescu & Barbu, 1940)
† Theodoxus bolivari (Royo Gómez, 1922)
† Theodoxus bukowskii (Oppenheim, 1919)
Theodoxus cariosus (Wood, 1828)
Theodoxus coronatus (Leach, 1815)[24]
† Theodoxus crenulatus (Klein, 1853)
† Theodoxus cunici (Brusina, 1892)
Theodoxus danasteri (Lindholm, 1908)[20][17]
† Theodoxus doricus (Neumayr, 1880)
Theodoxus euxinus (Clessin, 1886)
Theodoxus gloeri Odabaşi & Arslan, 2015
Theodoxus gurur Sands & Glöer, 2020
† Theodoxus hellenicus (Bukowski, 1896)
† Theodoxus imbricatus (Brusina, 1878)
† Theodoxus intracarpaticus Jekelius, 1944
Theodoxus karasuna[citation needed]
† Theodoxus licherdopoli (Stefanescu, 1896)
Theodoxus luteofasciatus (Miller, 1879)
Theodoxus macri (Sowerby, 1849)[citation needed]
Theodoxus maresi (Bourguignat, 1864)[25]
Theodoxus marteli (Pallary, 1920)[26]
Theodoxus milachevitchi Golikov & Starobogatov, 1966[17]
Theodoxus mutinensis[citation needed]
Theodoxus numidicus (Récluz, 1841)[27]
Theodoxus olivaceus[citation needed]
Theodoxus pallasi Lindholm, 1924
Theodoxus pallidus Dunker, 1861
† Theodoxus pappi Sauerzopf, 1952
† Theodoxus paradisii (Magrograssi, 1928)
† Theodoxus patrae Esu & Girotti, 2015
† Theodoxus percarinatus (Oppenheim, 1919)
Theodoxus pilidei (Tournouêr, 1879)[12]
† Theodoxus politioanei Jekelius, 1944
† Theodoxus politus Jekelius, 1944
Theodoxus poppei Ahuir, 2020
† Theodoxus postcrenulatus Papp, 1953
† Theodoxus prozlatarici Jekelius, 1944
† Theodoxus pseudodacicus Neubauer, Harzhauser, Georgopoulou, Mandic & Kroh, 2014 †
† Theodoxus quadrifasciatus (Bielz, 1864) †
† Theodoxus reticulatus Pană, 1990
† Theodoxus rhodiensis (Tournouër in Fischer, 1877)
Theodoxus sarmaticus (Lindholm, 1901)[20][17]
Theodoxus schultzii (Grimm, 1877)[22][17]
† Theodoxus scriptus (Stefanescu, 1896)
† Theodoxus serratiliniformis Geyer, 1914[23]
† Theodoxus sinjanus (Brusina, 1876)
† Theodoxus soceni Jekelius, 1944
† Theodoxus sphaeroidalis (Revilla, 1958)
† Theodoxus spratti (Jenkins, 1864)
† Theodoxus stoicai Neubauer, Harzhauser, Georgopoulou, Mandic & Kroh, 2014
Theodoxus subthermalis Bourguignat in Issel, 1865
† Theodoxus susuzianus Harzhauser, Neubauer & Hoşgör, 2018
† Theodoxus timisensis Jekelius, 1944
† Theodoxus trilophosensis Rust, 1997
Theodoxus velascoi (Graëlls, 1846)[12]
Theodoxus velox V. Anistratenko in O. Anistratenko, Starobogatov & V. Anistratenko, 1999
Theodoxus vespertinus (Sowerby II, 1849)
Theodoxus wesselinghi Sands & Glöer, 2020
Theodoxus wilkei Sands & Glöer, 2020
† Theodoxus zlatarici Brusina, 1902)
Synonyms
† Theodoxus burdigalensis (d'Orbigny, 1852) : synonym of † Theodoxus (Theodoxus) trifasciatus (Grateloup, 1839)
Theodoxus cariosus (Wood, 1828) and Theodoxus cariosa are synonyms of Neritina cariosa (Wood, 1828)[28]
† Theodoxus dacicus Jekelius, 1944: synonym of † Theodoxus (Theodoxus) leobersdorfensis dacicus Jekelius, 1944
Theodoxus doriae Issel, 1865: synonym of Theodoxus fluviatilis (Linnaeus, 1758) represented as Theodoxus (Theodoxus) fluviatilis (Linnaeus, 1758)
Theodoxus euphraticus (Mousson, 1874)[29] is a synonym of Neritina euphratica Mousson, 1874[30]
† Theodoxus intracarpatica Jekelius, 1944 : synonym of † Theodoxus intracarpaticus Jekelius, 1944
Theodoxus lutetianus Montfort, 1810: synonym of Theodoxus fluviatilis (Linnaeus, 1758) represented as Theodoxus (Theodoxus) fluviatilis (Linnaeus, 1758)
† Theodoxus mariae (Handmann, 1887): synonym of † Neritina mariae Handmann, 1887
† Theodoxus martensi (Brusina, 1884): synonym of † Ninnia martensi (Brusina, 1884)
Theodoxus neglectus is a synonym of Neritina neglecta (Pease, 1861)[28]
† Theodoxus oslavanensis Rzehak, 1893: synonym of † Theodoxus (Theodoxus) cyrtocelis austriacus (Rzehak, 1893)
Theodoxus oualaniense (Lesson, 1831): synonym of Checked: verified by a taxonomic editorClithon oualaniense (Lesson, 1831)
† Theodoxus perlongus Jekelius, 1944: synonym of † Theodoxus (Theodoxus) zografi perlongus Jekelius, 1944
† Theodoxus petralbensis Jekelius, 1944: synonym of † Theodoxus (Theodoxus) zografi petralbensis Jekelius, 1944
† Theodoxus pictus (Férussac, 1823): synonym of † Agapilia picta (Férussac, 1823)
Theodoxus reclivatus Say, 1822: synonym of Neritina usnea (Röding, 1798)
† Theodoxus rumanus (Stefanescu, 1896): synonym of † Theodoxus (Calvertia) stefanescui (Fontannes, 1887)
† Theodoxus scamandri (Calvert & Neumayr, 1880): synonym of † Theodoxus (Theodoxus) scamandrius (Calvert & Neumayr, 1880)
Theodoxus vespertinus : synonym of Neritina vespertinus (Sowerby, 1849)[28]
† Theodoxus vetranici (Brusina, 1902): synonym of † Neritina vetranici (Brusina, 1902)
Theodoxus virginea (Linnaeus, 1758): synonym of Neritina virginea (Linnaeus, 1758)
† Theodoxus (Vittoclithon) pictus bizonalis (Grateloup, 1839): synonym of † Agapilia picta bizonalis (Grateloup, 1839)
References
This article incorporates public domain text from the reference [3]
Montfort D. de (1810). Conchyliologie systématique, et classification méthodique des coquilles; offrant leurs figures, leur arrangement générique, leurs descriptions caractéristiques, leurs noms; ainsi que leur synonymie en plusieurs langues. Ouvrage destiné à faciliter l'étude des coquilles, ainsi que leur disposition dans les cabinets d'histoire naturelle. Coquilles univalves, non cloisonnées. Tome second. pp. [1-3], 1-676. Paris. (Schoell). page 350.
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