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T.marmoratus strange population.

Azhael

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A classmate was showing me some pics of T.marmoratus the other day. In one particular population, there were several "difficult" animals. Why? because it was not that eassy to clarify if they were marmoratus or pygmaeus!
These animals showed an intermediate size between both species (which means nothing really), a shorter crest with a more subtle "pelvic dip", resembling pygmaeus...and a creamy belly, with large black spots. The dorsal colouration was marmoratus though. The northern range pygmaeus are supossed to exhibit a spotted-like design.
Tail tips were collected and sent to be analyzed, to see if any genetic introgresion had occured in the population.
Wether there is something going on with these, or they are just another example of how variable marmoratus can be, i definitely find them to be interesting. This spring i´ll probably be lucky enough to go see them myself.

Btw, since i´m already hearing the "how could you" in my head, the pics aren´t mine, i wasn´t there, and yes, i also think it´s a rather rough way to handle them.....but hey they are the herpetologists....
 

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snussmak

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you don't think that they might be some form of hybrid? t.marmoratus tends to be more "greenish".
 

Azhael

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Actually that´s why the tail tips were sent to be studied. It´s believed that there is no hybridation between the species, but that doesn´t mean there aren´t exceptions. Also in this particular population what they are trying to see with the study is not if the animals are direct hybrids, but if there is some kind of genetic "contamination" from hybridation generations ago. As far as i was told there are no true pygmaeus in the area.
About marmoratus being greenish...well both marmoratus and pygmaeus show a very wide range of percentage of green, from nearly no green to almost all green, so no, the amount of green is not a differential characteristic.
I´ll try to talk with the guy and find out more about what they are trying to verify and about the population itself.
 

Azhael

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I´m sorry for bumping an old thread, but i just wanted to say that the results finally arrived, and the animal pictured is 100% marmoratus. Another wonder of the variability of this animals.
 
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