Affiliation entity
Équipe ÉVOMORPH
Interdisplinary research theme
Anatomy, Zoology, Systematics, Phylogenetics, Evolutionary Biology, Paleontology, Morphology, Mammalogy
Speciality
Evolutionary morphology of placental mammals, with a focus on South American taxa

Contact

E-mail
guillaume.billet [at] mnhn.fr
Phone
01 40 79 38 14
Fax
01 40 79 35 80
Custom address(es)

Bâtiment de paléontologie (CP38)
8 rue Buffon
75005 Paris
France

Responsibilities inside unit

Projet coordinator « Complex morphological variations and phylogenetic reconstructions »

Collections

Presentation

My work aims at improving our understanding of the patterns of morphological evolution in deep time, using mostly the diversification of extinct and extant South American placentals as a model. My studies on these aspects follow three main objectives:

  • describing and analyzing the patterning of unusual morphological variations, at different hierarchical levels (eg, ontogenetical, interspecfic, inter-individual)
  • studying potential links between these patterns of morphological variation and functional characteristics
  • searching for a phylogenetic signal in morphological data and improving our use of this kind of data for phylogenetic reconstructions and placement of fossil taxa

Publication list

Publications

2026
  • Billet Guillaume, Hautier Lionel, Gaudin Timothy J, Flynn John J, Ruf Irina, Carrillo Juan D, Ladevèze Sandrine, Lehmann Thomas, Nicolas Violaine, Orliac Maëva J, Tornero Cassandre, Wible John R, Wong Nicole M & Gaubert Philippe, 2026 — Brain drain: exceptional pattern of calvarial venation in pangolins and its phylogenetic significance for Ferae. Zoological Journal of the Linnean Society vol. 206, n° 3, zlag020
  • Hullot Manon, Jordana Xavier, Billet Guillaume & Rodrigues Helder Gomes, 2026 — Enamel histology in extinct mammals: Standardization of a methodological framework applied to toxodont notoungulates (Mammalia). Journal of Anatomy , ,
2025
  • Gheerbrant Emmanuel, Billet Guillaume & Pickford Martin, May 2025 — New data on the earliest known arsinoitheriid embrithopod (Mammalia, Paenungulata), Namatherium Pickford, Senut, Morales, Mein & Sanchez, 2008 from the middle Eocene of Namibia. Geodiversitas vol. 47, n° 8,
  • Gheerbrant Emmanuel, Billet Guillaume & Pickford Martin, 2025 — New data on the earliest known arsinoitheriid embrithopod (Mammalia, Paenungulata), Namatherium from the middle Eocene of Namibia (project). Geodiversitas vol. 47, n° 8, p. 343-366
  • Moison Benoît, Gerber Sylvain, Filippo Andréa, Grosmougin Maxime, Falconnet Jocelyn, Rinder Nicolas, Gaubert Philippe, Hautier Lionel & Billet Guillaume, January 2025 — Scaling up morphological differentiation of pangolin scales: Serial, ontogenetic and evolutionary variation. The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology vol. 308, n° 9, p. 2392-2412
2024
  • Gernelle Killian, Billet Guillaume, Gheerbrant Emmanuel, Godinot Marc, Marandat Bernard, Ladevèze Sandrine & Tabuce Rodolphe, 2024 — Taxonomy and evolutionary history of peradectids (Metatheria): New data from the early Eocene of France. Journal of Mammalian Evolution vol. 31, n° 3, p. 31 Publisher: Springer Verlag
  • Gernelle Killian, Billet Guillaume, Gheerbrant Emmanuel, Godinot Marc, Marandat Bernard, Ladevèze Sandrine & Tabuce Rodolphe, 2024 — 3D models related to the publication: Taxonomy and evolutionary history of peradectids (Metatheria): new data from the early Eocene of France. MorphoMuseum vol. 10, n° 3, e239 Publisher: Association Palæovertebrata
  • Gheerbrant Emmanuel, Billet Guillaume & Pickford Martin, 2024 — New data on the earliest known arsinoitheriid embrithopod (Mammalia, Paenungulata), Namatherium from the middle Eocene of Namibia. Geodiversitas , , Publisher: Museum National d’Histoire Naturelle Paris
2023
  • Carrillo Juan, Jaramillo Carlos, Abadía Fernando, Aguilera Orangel, Alfonso-Rojas Andrés, Billet Guillaume, Benites-Palomino Aldo, Cadena Edwin-Alberto, Cárdenas Andrés, Carlini Alfredo, Carrillo-Briceño Jorge, Carvalho Mónica, Cortés Dirley, Escobar Jaime, Herrera Fabiany et al., December 2023 — The Miocene La Venta Biome (Colombia): A century of research and future perspectives. Geodiversitas vol. 45, n° 26, Publisher: Museum National d’Histoire Naturelle Paris
  • Le Verger Kévin, Hautier Lionel, Gerber Sylvain, Bardin Jérémie, Delsuc Frédéric, González Ruiz Laureano, Amson Eli & Billet Guillaume, December 2023 — Pervasive cranial allometry at different anatomical scales and variational levels in extant armadillos. Evolution - International Journal of Organic Evolution , , Publisher: Wiley