The Species Black List
Hebius chapaensis
Chapa flat-nosed keelback
The Chapa flat-nosed keelback (Hebius chapaensis) is known only from a small area of montane forest in northern Vietnam, where it was last reported in the early twentieth century.
Status Data Deficient on the IUCN Red List Restriction tier 2, restricted, extent unclear Class Reptilia Realm Palearctic Locality not specified in the source As IUCN records it Hebius chapaensis (Bourret, 1934) This species is one of 3,062 in a list of vertebrates the IUCN Red List records as Data Deficient or has never assessed, ranked by how narrowly restricted the published record says they are. The sentence above is the evidence the tier was read from, quoted from Matthew Richardson, Threatened and Recently Extinct Vertebrates of the World (2023).
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