Schaefer’s Spiny-jawed Snake was described in 1995; it is, however, known from a single specimen that was collected in Hutan Lipur Templer, a forest reserve in the Gombak District of Selangor, Malaysia.

The species was apparently never found since; it is officially treated as “Data Deficient” but, given the ongoing destruction of many forests around the world, might well be already extinct.

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edited: 22.01.2022