I believe it's up into the 60's. Check out Varanus.nl's species accounts, Vincent's got everything up to date there..
As for here in the US, I'll give it a shot. Other people feel free to fill in any I left out. Here goes:
Varanus salvator-many different subspecies
Varanus exanthematicus
Varanus niloticus
Varanus ornatus
Varanus dumerilli
Varanus salvadorii
Varanus albigularis-white throats and blackthroats
Varanus timorenis
Varanus auffenbergi
Varanus similis
Varanus prasinus
Varanus beccari
Varanus macraei
Varanus boehmei
Varanus doreanus
Varanus melinus
Varanus caruelvirensis
Varanus indicus
Varanus jobiensis
Varanus griseus
Varanus acanthurus
Varanus tristis t & orientalis
Varanus glauerti
Varanus pilbarensis
Varanus mertensi
Varanus varius
Varanus kingorum
Varanus gilleni
Varanus caudolineatus
Varanus storri
Varanus gouldi
Varanus panoptes
Varanus flavirufus
and then there are the ones that there may be a few floating around the country, but are not by any means "regularly available", like
V. bengalensis and V. yuowoni
Wow, now that I look over this list, it's pretty amazing how many species are here in the US. I guess it would have been easier for me to list the ones that aren't here, but oh well,
Well boys and girls, did I forget any?
bob
The Odatriad
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