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- Title
First Report of B Chromosomes in Caecilians (Amphibia: Gymnophiona).
- Authors
Venu, Govindappa; Rajendran, Albert; Raju, Narayanappa Govinda; Browne, Robert Kenneth; Ramakrishna, Sompalem; Venkatachalaiah, Govindaiah
- Abstract
Gymnophion amphibians (caecilians) are less well studied than the other two orders of extant amphibians: Anura and Caudata. We describe the first recorded presence of supernumerary (B) chromosomes in the order Gymnophiona, where a lone intensely stained B chromosome was observed in the somatic metaphase and meiotic complements of the Indian ichthyophiid, Uraeotyphlus gansi. Given the rarity of B chromosomes in caecilians and their sporadic presence within U. gansi, it is likely that these represent aneuploidy and are a recent acquisition derived from centromeric drive.
- Subjects
CHROMOSOMES; SALAMANDERS; ANEUPLOIDY; ANURA; AMPHIBIANS
- Publication
Ichthyology & Herpetology, 2021, Vol 109, Issue 2, p443
- ISSN
0045-8511
- Publication type
Article
- DOI
10.1643/h2020119