Genus Anilius (South American Pipe Snake) (Serpentes: Aniliidae)
regions with most species  (as of 31st December 2018)

© Rune Midtgaard
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*Regions with same number of species are ranked alphabetically
Rank* Region Species 
No. 1
Acre [Brazil]
 1
No. 2
Amapa [Brazil]
 1
No. 3
Amazonas [Brazil]
 1
No. 4
Bolivia
 1
No. 5
Brazil
 1
No. 6
Ceara [Brazil]
 1
No. 7
Colombia
 1
No. 8
Ecuador
 1
No. 9
Ecuadorian mainland [Ecuador]
 1
No. 10
French Guiana [France]
 1
No. 11
Goias [Brazil]
 1
No. 12
Guyana
 1
No. 13
Maranhao [Brazil]
 1
No. 14
Mato Grosso [Brazil]
 1
No. 15
Para [Brazil]
 1
No. 16
Peru
 1
No. 17
Rondonia [Brazil]
 1
No. 18
Surinam
 1
No. 19
Tocantins [Brazil]
 1
No. 20
Trinidad [Trinidad & Tobago]
 1
No. 21
Trinidad & Tobago
 1
No. 22
Venezuela
 1