fieldherping.eu

Interesting. Would love to read the full paper... (edit: got it now, thanks)

http://onlinelibrary.wiley.com/doi/10.1 ... 2/abstract

They say that they don't found hybrids but unfortunatly there is a big lack of sampling in West Pyrénées where there is seemed to have a large introgression between helvetica and astreptophora...