[ **up: [[Animals]] | [[Mammals]] | [[Rodents]] | [[Cricetidae (Family)]] | [[Lemmings|Arvicolinae (Subfamily)]] | [[Bramus (Genus)]]** ] --- # Transcaucasian mole vole (*Bramus lutescens*) Previously known as *Ellobius lutescens.*[^1] --- ## Taxonomy - **[[Life (Biology)]]** - **[[Eukaryotes|Eukaryota (Domain)]]** - [[Animals|Animalia (Kingdom)]] - [[Chordates|Chordata (Phylum)]] - [[Mammals|Mammalia (Class)]] - [[Rodents|Rodentia (Order)]] - [[Bramus (Genus)]] - [[Transcaucasian mole vole|Bramus lutescens]] --- ## Description ### Sex determination #### Females and males with an identical XO karyotype (loss of the second X chromosome in females and of the Y in males) [[2025-0313. 'In mammals, there are indeed a few natural exceptions to the standard XX-XY sex determination system.'|’In mammals, there are indeed a few natural exceptions to the standard XX/XY sex determination system (SDS). For example … both males and females are X0 in the … the mole vole Ellobius lutescens.’]][^2] [[2025-0323. 'So far, these unusual sex-determining systems have been unambiguously identified by molecular or cytogenomic methods in seven genera, all rodents, which group in four categories.'|’Females and males with an identical XO karyotype (loss of the second X chromosome in females and of the Y in males) in the Japanese spiny rats … and the mole vole Ellobius lutescens.’]][^3] [^1]: ‘Ellobius’, *Wikipedia*, 1 February 2025, https://en.wikipedia.org/wiki/Ellobius. [^2]: P. A. Saunders, et al., ‘[[Saunders, et al. ‘Masculinised behaviour of XY females in mammal with naturally occurring sex reversal’, 2016.|Masculinised behaviour of XY females in a mammal with naturally occurring sex reversal]]’, *Scientific Reports*, vol. 6 (11 March 2016), p. 1. [^3]: Frederic Veyrunes, et al., ‘[[Veyrunes, et al. 'A novel sex determination system in a close relative of the house mouse', 2010.|A novel sex determination system in a close relative of the house mouse]]’, *Proceedings of the Royal Society B: Biological Sciences*, vol. 277, issue 1684 (7 April 2010), p. 1050.