Chironius

Chironius is a genus of New World colubrid snakes, commonly called sipos, savanes, or sometimes vine snakes. There are 23 described species in this genus.

Species

The following 23 species are recognized as being valid.

Chironius bicarinatus – two-headed sipo
Chironius brazili
Chironius carinatus – Amazon coachwhip
Chironius challenger Kok, 2010
Chironius diamantina
Chironius exoletus – Linnaeus's sipo
Chironius flavolineatus – Boettger's sipo
Chironius flavopictus
Chironius foveatus Bailey, 1955 – South American sipo
Chironius fuscus – brown sipo
Chironius gouveai Entiauspe-Neto, Lúcio-Lyra, Koch, Marques-Quintela, Diesel-Abegg & Loebmann, 2020 – Gouvea's sipo
Chironius grandisquamis – Ecuador sipo
Chironius laevicollis – Brazilian sipo
Chironius laurenti Dixon, Wiest & Cei, 1993
Chironius leucometapus – yellow-headed sipo
Chironius maculoventris – central sipo
Chironius monticola Roze, 1952 – mountain sipo
Chironius multiventris Schmidt & Walker, 1943 – long-tailed machete savane
Chironius quadricarinatus – central sipo
Chironius scurrulus – Wagler's sipo, smooth machete savane
Chironius septentrionalis Dixon, Wiest & Cei, 1993 – South American sipo
Chironius spixii
Chironius vincenti – St. Vincent blacksnake

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Chironius.

Conservation status

The St. Vincent Blacksnake, Chironius vincenti, is listed as critically endangered by the IUCN Red List due to its extremely limited range on the Island of St. Vincent.