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Colubridae
Thamnophis
butleri Thamnophis butleri
couchii Thamnophis couchii
cyrtopsis Thamnophis cyrtopsis
elegans Thamnophis elegans
marcianus Thamnophis marcianus
ordinoides Thamnophis ordinoides
radix Thamnophis radix
sauritus Thamnophis sauritus
sirtalis Thamnophis sirtalis

Found 9 branches in Thamnophis (query or survey).