Three-dimensional reconstruction of the lower jaw of Siagonodon exigumm sp. nov. based on µ-CT data in lateral (a, c, e) and medial (b, d, f) views. MNRJ 27562 (a–b), MNHN-RA-2023.0001 (c–d), MNRJ 27558 (e–f). Abbreviations: an angular; asf anterior surangular foramen; co coronoid; de dentary; dppd dorsoposterior process of dentary; mf mental foramen; par prearticular lamina of compound bone; qd quadrate; qdf quadrate foramen; rp retroarticular process; sp splenial; spd symphyseal process of dentary.

 
 
  Part of: Martins A, Folly M, Ferreira GN, Garcia da Silva AS, Koch C, Fouquet A, Machado A, Lopes RT, Pinto R, Rodrigues MT, Passos P (2023) An evolutionary paradox on threadsnakes: Phenotypic and molecular evidence reveal a new and remarkably polymorphic species of Siagonodon (Serpentes: Leptotyphlopidae: Epictinae) from Amazonia. Vertebrate Zoology 73: 345-366. https://doi.org/10.3897/vz.73.e98170