Misplaced Pages

Bradynema rigidum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Nematoda
Class:	Secernentea
Order:	Tylenchida
Family:	Allantonematidae
Genus:	Bradynema
Species:	B. rigidum
Binomial name
Bradynema rigidum (Von Siebold, 1836)
Synonyms
Filaria rigidum Von Siebold, 1836

Bradynema rigidum is a parasitic species of nematode in the Allantonematidae family. The species has been classified as androdioecious. The parasite will live freely in its host; groupings of 2–3 to up to twenty may occur together.

In this species it was found that blastomeres in the 4 cell stage might be in 2 possible arrangements.

The species was originally discovered by Philipp Franz von Siebold in the 19th century. Otto zur Strassen received a doctorate in 1892 for writing his dissertation about the nematode. The larva development was first described by Wülker. In this species male larva develop into adults after 8 days, while the females develop into adults after 7 or 10 days. All adults are hermaphrodites. It has been suggested that males develop ovaries and become hermaphrodites while the females degenerate.

References

1. ^ "Bradynema rigidum (Von Siebold, 1836)". Fauna Europaea. Fauna Europaea Secretariat, Museum für Naturkunde, Berlin. Retrieved 2 August 2023.
2. ^ Doncaster, L. (2015-03-12). The Determination of Sex. Cambridge University Press. p. 122. ISBN 978-1-107-49284-4.
3. Weeks, Stephen C. (2012). "The Role of Androdioecy and Gynodioecy in Mediating Evolutionary Transitions Between Dioecy and Hermaphroditism in the Animalia". Evolution. 66 (12): 3670–3686. doi:10.1111/j.1558-5646.2012.01714.x. ISSN 1558-5646. PMID 23206127. S2CID 3198554.
4. ^ Journal of the Royal Microscopical Society. Royal Microscopical Society. 1893.
5. Giese, Arthur C.; Pearse, John S. (2013-09-17). Acoelomate and Pseudocoelomate Metazoans. Elsevier. p. 442. ISBN 978-1-4832-6055-6.
6. Killy, Walther; Vierhaus, Rudolf (2011-11-30). Schmidt - Theyer. Walter de Gruyter. p. 585. ISBN 978-3-11-096629-9.
7. Nickle, William R. (2020-12-17). Manual of Agricultural Nematology. CRC Press. ISBN 978-1-000-14771-1.
8. Doncaster, L. (2015-03-12). The Determination of Sex. Cambridge University Press. p. 123. ISBN 978-1-107-49284-4.

This Secernentea roundworm- related article is a stub. You can help Misplaced Pages by expanding it.

• v
• t
• e

• Tylenchida
• Taxa named by Philipp Franz von Siebold
• Nematodes described in 1836
• Secernentea stubs