The Species Black List
Thylamys tatei
Tate's fat-tailed mouse opposum
Tate's fat-tailed mouse opposum (Thylamys tatei) is confined to a few localities in the coastal deserts and shrublands of western Peru (Ancash and Lima departments).
Status Data Deficient on the IUCN Red List Restriction tier 2, restricted, extent unclear Class Mammalia Realm Patagonian Locality not specified in the source As IUCN records it Thylamys tatei (Handley, 1957) 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