ON THE EDGE OF EXTINCTION - A - THE TIGER (Panthera tigris)

[GrizzlyClaws]

(03-22-2019, 04:05 PM)Sanju Wrote: @GrizzlyClaws 

From which subspecies "sondaica" (formerly, balica; sondaica and sumatrae) subspecies evolved? modern south china/Pleistocene sunda spp/both spp through hybridisation?

I think, after Toba eruption South China Tigers (ancestor of remaining subspecies and most ancient of all along with indochinese "corbetti")  from Wanhsien tiger (antique tiger or acutidens) remaining small founder population, the only population of tigers left spread across mainland and sunda (when it is together with asia during ice age glacial maximum).

*This image is copyright of its original author

*This image is copyright of its original author

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But, I read some where in forum and wiki of oxygnatha that Ngandong (oxygnatha or trinil?) tiger is also the ancestor of sunda tigers? HOW? Through hybridization with south china??

I strongly believe in 2 subspecies (tigris and sondaica) modern tiger spp idea. They may have local traits and adaptation particular to regions (could be due to disruption in connectivity of their sub populations due to humans since 1,00,000 yrs could be also a reason for some differences in formerly wrongly alleged spps as "9") but little local traits and characteristics differences are not enough to consider as spps.

and I also support Amur Reintroduction to Hyrcan region.

Javan tiger: pure biological descendant of the Ngandong tiger, but exposed to the insular dwarfism

Bali tige: pure biological descendant of the Ngandong tiger, but also exposed to the insular dwarfism

Sumatran tiger: mixed descendant of the Ngandong tiger and the post-eruption mainland tiger (Wanhsien tiger) population


That's the likely theory for the evolutionary lineage for the modern Sunda tiger.

However, the genetic study that is quite certain that the modern Sunda tiger also shared a common ancestor with the modern Mainland tiger as recent as 75 kya, then the aforementioned graphs were likely accurate about the whole context. Reply