Bonatitan

Bonatitan is a genus of titanosaurian dinosaur from the Late Cretaceous Allen Formation of Argentina. It was named in 2004.^[1][2]

Bonatitan Temporal range: Late Campanian-Early Maastrichtian ~75–70 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Speculative life restoration
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Clade:	†Macronaria
Clade:	†Titanosauria
Family:	†Saltasauridae
Subfamily:	†Saltasaurinae
Genus:	†Bonatitan
Species:	†B. reigi
Binomial name
†Bonatitan reigi Martinelli & Forasiepi, 2004

Description

The type species is Bonatitan reigi, first described by Martinelli and Forasiepi in 2004. The specific epithet honours Osvaldo Reig. The holotype, MACN-PV RN 821, originally included a braincase and caudal vertebrae as well as limb elements. However, Salgado et al. (2014) emended the holotype to include the braincase only, and treated other elements catalogued under MACN-PV RN 821 as belonging to separate individual based on size and relative proportions.^[3] The genus and species names honor the famous Argentine paleontologists José Fernando Bonaparte and Osvaldo Reig.

Phylogeny

Bonatitan in a cladogram after Navarro et al., 2022:^[4]

Saltasauridae	Opisthocoelicaudiinae Opisthocoelicaudia Nemegtosaurus Saltasaurinae Alamosaurus Baurutitan Ibirania Bonatitan Rocasaurus Saltasaurini Neuquensaurus MACN-PV-RN 233 Saltasaurus