https://www.academia.edu/145391895/Case_for_Basque_Languages_rather_than_Dialects
++++++++++++
Two Ideas, Same Idea! Humans!
The classification of Homo neanderthalensis as a species distinct from Homo sapiens persists despite extensive genetic, morphological, and reproductive evidence of sustained, fertile interbreeding. This personal commentary re-examines Ernst Mayr’s Biological Species Concept (BSC) and argues that reciprocal gene flow and the production of fully fertile offspring preclude unambiguous species boundaries. Neanderthals are best interpreted as an archaic regional biotype or subspecies within a single polytypic Homo sapiens metapopulation, comparable to Denisovans. Just as humans retain deeply conserved metabolic genes shared with distant taxa without being classified as hybrids of those organisms (Hochachka & Somero, 2002), the 1–4 % Neanderthal ancestry in non-African populations reflects normal intraspecific variation rather than 'interspecific' hybridization. While fully acknowledging the paleogenomic contributions of Svante Pääbo and colleagues, we caution that describing living Eurasians as “hybrids of two different species” is biologically unnecessary and carries ethical risks. We therefore advocate taxonomic revision to Homo sapiens neanderthalensis (or an equivalent subspecific designation). If the separate-species model is retained despite fertile interbreeding, an international congress should reconsider the application of the BSC itself.
No hay comentarios:
Publicar un comentario