The Species Black List
Apostolepis tenuis
Ruthven's burrowing snake
Ruthven's burrowing snake (Apostolepis tenuis) is known only from two specimens collected during the early twentieth century from central and northwestern Bolivia (Beni and Santa Cruz departments).
Status Data Deficient on the IUCN Red List Restriction tier 2, restricted, extent unclear Class Reptilia Realm Neotropical Locality Terra firma As IUCN records it Apostolepis tenuis Ruthven, 1927 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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Check this species elsewhere: IUCN Red List · GBIF