Species introCountry intro
Brown Amphibian, Inírida, Colombia
Kicking of our second night tour in Inírida. Which isn't really a thing there, so the team improvised. We went to a friended farmers land in the darkest night I've ever seen (milky way visible with the naked eye). There we visited a very dense and wet wooded area. Trees were so dense that I struggled every step as my tall body and bulky bag pack could not fit in between. The forest floor was mostly flooed, with only tiny patches of ground.
One of the first finds was this pretty common looking frog, yet to be identified.
''Leptodactylus riveroi'' is a species of frog in the family Leptodactylidae. Its local name is ''sapo-rana rugoso de Rivero'' .
It is found in Brazil, Colombia, Venezuela, and possibly Peru. Its natural habitats are subtropical or tropical moist lowland forests and rivers. It is not considered threatened by the IUCN. It was discovered by Dr. Juan A. Rivero.
comments (7)
https://calphotos.berkeley.edu/cgi/img_query?seq_num=245396&one=T
Secondary candidate from Bolivia that is also close:
https://calphotos.berkeley.edu/cgi/img_query?seq_num=122508&one=T
Another, also found in Colombia:
https://calphotos.berkeley.edu/cgi/img_query?seq_num=215385&one=T
All others in the genus look significantly different, to a layman like me that is :) Posted 6 years ago
Leptodactylus bolivianus
Leptodactylus fragilis
Leptodactylus longirostris
Leptodactylus mystaceus
The next step would be to track down the ranges of these species, which might rule some out. And then to track down the diagnostic characteristics that can be used to tell the remaining species apart. That part is often very hard to do without expert knowledge, but sometimes you can be lucky and discover a paper or book or website that does this. I'll look around a little more. Posted 6 years ago
L. fuscus
L. knudseni
L. lithonaetes
L. longirostris
L. riveroi
Of these, the L. knudseni and L. lithonaetes don't have the white lip. L. fuscus sometimes does, but has much stronger patterning, and has dorsoventral ridges as well as dorsolateral ridges (i.e., raised lines about halfway down each side as well as raised lines between the back and sides).
So that leaves us with L. longirostris and L. riveroi. According to these maps, there are a number of records for L. riveroi in that area, but only one record for L. longirostris in the entire country (but that one record is in this general area). So that makes L. riveroi more likely, but obviously is not definitive.
Without trying to track down the diagnostic differences between the two species, I'd say that yours looks considerably more like the online photos of L. riveroi than L. longirostris. If this were my observation I wouldn't hesitate to call it L. riveroi. Posted 6 years ago