Ymboirana

Ymboirana was an extinct genus of caecilian described based on a fossil found in the Oligocene Tremembé Formation (Taubaté Basin), Brazil. The holotype and only known specimen comprises a partially preserved skeleton, including parts of the skull and vertebral column. Ymboirana was identified as an extinct representative of the family Typhlonectidae, a subgroup of caecilians well known because its members, unlike all other living caecilians, exhibit an aquatic or semi-aquatic lifestyle when adults.^[1]

Ymboirana Temporal range: Oligocene, 28–23 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Amphibia
Order:	Gymnophiona
Clade:	Apoda
Family:	Typhlonectidae
Genus:	†Ymboirana Santos, Wilkinson, do Couto Ribeiro, Carvalho & Zaher, 2024
Species:	†Y. acrux
Binomial name
†Ymboirana acrux Santos, Wilkinson, do Couto Ribeiro, Carvalho & Zaher, 2024