What's your favorite "lost" species?

[deboas]

A lost plant has been found again in Ecuador. Gasteranthus extinctus, as its scientific name suggests, was suspected to be among the “Centinelan extinctions” of plants identified by Alwyn Gentry and made famous by E. O. Wilson. However, it lives on! Sadly, neither Gentry nor Wilson are still around to hear the good news. The paper also mentions iNaturalist observations of the species, which had been made, though not identified, before Nigel Pitman et al. made their rediscovery in November last year. There’s a popular article about the rediscovery here.