Comahuesaurus

Comahuesaurus (meaning "Comahue lizard") is a genus of sauropod dinosaur of the family Rebbachisauridae. It was found in the Lohan Cura Formation, in Argentina and lived during the Early Cretaceous, Aptian to Albian. The type species is C. windhauseni, named by Carballido and colleagues in 2012.[1] It had originally been assigned to Limaysaurus by Salgado et al. (2004),[2] but was later assigned its own genus based on the presence of diagnostic characters in the caudal centra, pubis and ischium.[1]

Comahuesaurus
Temporal range: Aptian-Albian
~125–100 Ma
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Suborder: †Sauropodomorpha
Clade: †Sauropoda
Family: †Rebbachisauridae
Genus: †Comahuesaurus
Carballido et al. 2012
Species:
†C. windhauseni
Binomial name
†Comahuesaurus windhauseni
Carballido et al. 2012

Comahuesaurus is known from abundant material compared to other rebbachisaurids; 37 caudal vertebrae, three fragmentary dorsal vertebrae and multiple appendicular elements, including a right humerus, pubis, ischium and a 113 cm long left femur. In their phylogenetic analysis, Carballido et al. (2012) placed Comahuesaurus in an intermediate position between basal rebbachisaurids such as Histriasaurus and the derived clade formed by subfamilies Rebbachisaurinae and Limaysaurinae.[1]

It shares with more derived rebbachisaurids a reduced hyposphene-hypantrum system, but hadn't yet completely lost said structure; that change would happen at some further point in the evolution of the clade, as it is so far only known to be fully absent in limaysaurines.[1]

References
  1. Carballido, José Luis; Salgado, Leonardo; Pol, Diego; Canudo, José Ignacio; Garrido, Alberto (2012). "A new basal rebbachisaurid (Sauropoda, Diplodocoidea) from the Early Cretaceous of the Neuquén Basin; evolution and biogeography of the group". Historical Biology. 24 (6): 631–654. doi:10.1080/08912963.2012.672416.
  2. Salgado, L; Garrido, AC; Cocca, JR (2004). "Lower Cretaceous rebbachisaurid sauropods from the Cerro Aguada León (Lohan Cura Formation), Neuquén Province, Northwestern Patagonia, Argentina". J. Vert. Paleontol. 24 (4): 903–912.


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