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Help Id. Amazonian snakes!

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Old Tuesday 21st April 2020, 16:08   #1
Glimmer
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Help Id. Amazonian snakes!

First from Ecuador, Amazonia. False equis?

Second from Pantanal, Brasil (not Amazonian)

Third from Bolivia, near Rurrenabaque

Thx!
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Old Wednesday 22nd April 2020, 13:56   #2
andyadcock
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1 Does look like a Fer-de-Lance mimic but the rounded pupil gives it away as not that species.

2 One of the snail eating species or a Treesnake?

3 Seems to have tiny eyes, similar to Hydromorphus but no idea if they occur here.

There is a huge shortage of literatute in this area for snakes.
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Old Wednesday 22nd April 2020, 19:08   #3
Glimmer
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Quote:
Originally Posted by andyadcock View Post
1 Does look like a Fer-de-Lance mimic but the rounded pupil gives it away as not that species.

2 One of the snail eating species or a Treesnake?

3 Seems to have tiny eyes, similar to Hydromorphus but no idea if they occur here.

There is a huge shortage of literatute in this area for snakes.
First should be Xenodon rabdocephalus, I think, cause of the round pupile and Fer de lance look like
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Old Wednesday 22nd April 2020, 19:15   #4
Glimmer
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Add another one from Pantanal
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Old Friday 15th May 2020, 16:27   #5
SteveTS
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Quote:
Originally Posted by Glimmer View Post
Add another one from Pantanal

This looks good for Chironius quadricarinatus sp., eight upper labials, two posterior temporals, general appearance and locality encouraging.

A diverse and challenging genus. There is a wealth of (highly variable) pay-as-you-go literature out of which this may help : Phylogeny, diversity and biogeography of Neotropical sipo snakes (Serpentes: Colubrinae: Chironius).

Interesting thread, and thanks for posting, I'll have another look as time allows.

Regards, Steve
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