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Testechiniscus macronyx (Richters, 1908)

 

 

Taxonomy & Nomenclature

Synonym/s: Echiniscus macronyx Richters, 1908

 

This species does not belong in the genus Testechiniscus, but it's generic placement awaits further investigation and hopefully genetic testing (Gąsiorek, 2023).

 

Conservation Status

Rediscovered (Mcinnes, 1994)

 

A report of Brazilian specimens (de Barros, 1942) likely refers to a different echiniscid (Kaczmarek et al., 2015).

 

Distribution

South Georgia, South Atlantic

 

Biology & Ecology

 

 

Hypodigm

 

 

Media

 

 

References

Original scientific description:

Richters F. (1908). Moosbewohner. Wiss. Ergeb. Schwedischen Süd- polar Expedit. (1901-1903),. 1901-1903), Bd V, Liefg 2, 1-16.

 

Other references:

de Barros, R. (1942) Tardigrados de Estado de Sao Paulo, Brasil. I. Introducao. Generos Echiniscus e Pseudechiniscus. Revista Brasileira de Biologia, 2, 257 - 269.

Gąsiorek, Piotr. (2023). Eventually tested: Phylogenetic position of “Testechiniscus” meridionalis (Murray, 1906) (Heterotardigrada) revealed. Zoologischer Anzeiger 304: 49-60. https://doi.org/10.1016/j.jcz.2023.02.004

Gąsiorek, P., Stec, D., Zawierucha, K., Kristensen, R. M. and Michalczyk, Ł. (2018). Revision of Testechiniscus Kristensen, 1987 (Heterotardigrada: Echiniscidae) refutes the polar-temperate distribution of the genus. Zootaxa 4472: 261-297.

Guidetti, R., McInnes, S. J. and Kristensen, R. M. (2025). World List of Tardigrada. Testechiniscus macronyx (Richters, 1908). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=343570 on 2025-05-17

Kaczmarek, Łukasz, Michalczyk, Łukasz and Mcinnes, Sandra J. (2015). Annotated zoogeography of non-marine Tardigrada. Part II: South America. Zootaxa 3923(1): 1-107 [29].

Mcinnes, Sandra J. (1994). Rediscovery of the species Echiniscus macronyx Richters, 1907 on South Georgia, South Atlantic, its new systematic position and redescription within the genus Testechiniscus. Bolletino di Zoologia 61(1): 83-87.

Richters, F. (1907). Antarktische Tardigraden. Zool. Anz. 31: 915-916.

 

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