Ecology

Habitat

Depth range based on 36 specimens in 3 taxa.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 1 - 22
  Temperature range (°C): 8.600 - 8.600
  Nitrate (umol/L): 1.265 - 1.265
  Salinity (PPS): 7.618 - 7.618
  Oxygen (ml/l): 8.061 - 8.061
  Phosphate (umol/l): 0.326 - 0.326
  Silicate (umol/l): 11.134 - 11.134

Graphical representation

Depth range (m): 1 - 22
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:117Public Records:109
Specimens with Sequences:113Public Species:13
Specimens with Barcodes:111Public BINs:10
Species:13         
Species With Barcodes:13         
          
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Barcode data

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Theodoxus

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Wikipedia

Theodoxus

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.

Contents

Distribution[edit]

The distribution of the genus Theodoxus includes Europe and northern Africa and also extends east to southern Iran.[3]

Description[edit]

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.[4]

Ecology[edit]

These animals are 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 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[edit]

Species within the genus Theodoxus include:

Subgenus Theodoxus

Subgenus Neritaea Roth, 1855[15]

Subgenus ?

Synonyms:

References[edit]

This article incorporates public domain text from the reference [3]

  1. ^ 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.
  2. ^ "Theodoxus". Fauna Europaea, last update 27 January 2011, accessed 12 April 2011.
  3. ^ a b c d e f g h "Genus summary for Theodoxus". AnimalBase, last modified 24 February 2009, accessed 11 April 2011.
  4. ^ Zettler M. L., Frankowski J., Bochert R. & Röhner M. (2004). "Morphological and ecological features of Theodoxus fluviatilis (Linnaeus, 1758) from Baltic brackish water and German freshwater populations". Journal of Conchology 38(3): 305-316. PDF.
  5. ^ a b c d e f g h i j k l m n o p q r s t "Species in genus Theodoxus" (n=20). AnimalBase, accessed 11 April 2011.
  6. ^ a b c d e f g h i (German) Schütt H. (1965). "Zur Systematik und Ökologie türkischer Süßwasserprosobranchier". Zoologische Mededelingen 41(3): 43-72, Plate 1. abstract, PDF.
  7. ^ a b c d e f g h i j k l m n "Theodoxus". Fauna Europaea, last update 27 January 2011, accessed 12 April 2011.
  8. ^ a b c d e f g h i j Kantor Yu I., Vinarski M. V., Schileyko A. A. & Sysoev A. V. (published online on March 2, 2010). "Catalogue of the continental mollusks of Russia and adjacent territories". Version 2.3.1.
  9. ^ a b c d e Anistratenko V. V. (2005). "Lectotypes for Tricolia pullus, Gibbula divaricata and Theodoxus fluviatilis (Mollusca, Gastropoda) revisited". Vestnik zoologii 39(6): 3-10. PDF .
  10. ^ a b Bunje, P. M. E. (2005). "Pan-European phylogeography of the aquatic snail Theodoxus fluviatilis (Gastropoda: Neritidae)". Molecular Ecology 14 (14): 4323–4340. doi:10.1111/j.1365-294X.2005.02703.x. PMID 16313596.  edit PDF.
  11. ^ a b c Anistratenko O. Y., Starobogatov Y. I. & Anistratenko V. V. (1999). "Mollusks of the genus Theodoxus (Gastropoda, Pectinibranchia, Neritidae) from the Black and the Azov seas basin". Vestnik Zoologii 33: 11-19.
  12. ^ Zettler M. & Van Damme D. (2010). Theodoxus meridionalis. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. <www.iucnredlist.org>. Downloaded on 11 April 2011.
  13. ^ a b c Zettler M. L. (2007). "A redescription of Theodoxus schultzii (Grimm, 1877), an endemic neritid gastropod of the Caspian Sea". Journal of Conchology 39(3): 245-252. abstract.
  14. ^ a b Glöer P. (2002). Die Süßwassergastropoden Nord- und Mitteleuropas. Die Tierwelt Deutschlands, ConchBooks, Hackenheim, 326 pp., ISBN 3-925919-60-0.
  15. ^ Roth (1855). Malak. Bl. 2: 56.
  16. ^ a b c "Neritaea". Fauna Europaea, last update 27 January 2011, accessed 12 April 2011.
  17. ^ Van Damme D. & Ghamizi M. (2009). Theodoxus niloticus. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. <www.iucnredlist.org>. Downloaded on 11 April 2011.
  18. ^ WoRMS (2010). Theodoxus coronatus (Leach, 1815). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216264 on 2011-04-11
  19. ^ ., A. Z. E.; ., N. S. I. (2006). "Population Structure and Shell Morphometrics of the Gastropod Theodoxus macri (Neritidae: Prosobranchia) from Azraq Oasis, Jordan". Pakistan Journal of Biological Sciences 9 (3): 549. doi:10.3923/pjbs.2006.549.552.  edit
  20. ^ Brown D. S. (1996). Theodoxus maresi. 2006 IUCN Red List of Threatened Species. Downloaded on 7 August 2007.
  21. ^ Van Damme D. & Ghamizi M. (2007). Theodoxus marteli. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. <www.iucnredlist.org>. Downloaded on 11 April 2011.
  22. ^ Van Damme D. & Ghamizi M. (2007). Theodoxus numidicus. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. <www.iucnredlist.org>. Downloaded on 11 April 2011.
  23. ^ a b c Goodwin D. R. (2006). "The Discovery of Neritina (Theodoxus) cariosa (Wood, 1828) on the Island of Maui, Hawaii (Gastropoda: Neritidae)". Visaya Net 11 pp. PDF.
  24. ^ Mansoorian A. (2001). "Freshwater Gastropod of Khuzestan Province, South-West Iran". Iranian Int. J. Sci. 2(2): 9 pp. PDF.
  25. ^ Glöer P. & Pešić V. (2012). "The freshwater snails (Gastropoda) of Iran, with descriptions of two new genera and eight new species". ZooKeys 219: 11-61, doi:10.3897/zookeys.219.3406.
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