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Temporal range: Toarcian
~180–172 Ma
Scientific classification
A. patagonicus
Binomial name
Amygdalodon patagonicus
Cabrera 1947

Amygdalodon (/əmɪɡˈdælədɒn/; "almond tooth" for its almond shaped teeth) was a genus of basal sauropod from the Middle Jurassic of Argentina.


The type species, Amygdalodon patagonicus, was described by Cabrera in Argentina in 1947.[1] Fossils of Amygdalodon have been found in the Toarcian to Aalenian or Bajocian Cerro Carnerero Formation of the Jurassic (about 170 million years ago), and only a few bone fragments and teeth have been discovered. Very little is known about it, but it is one of the few Jurassic dinosaurs from South America found thus far.


Amygdalodon is estimated to have been 12 metres (39 ft) long and 4 metres (13 ft) tall. This quadrupedal dinosaur had an estimated weight of over 5 tonnes (4.9 long tons; 5.5 short tons).[2]


Rauhut (2003) placed Amygdalodon as Eusauropoda incertae sedis based on examination of the type material.[3] Later, a cladistic analysis conducted by Carballido et al. (2010) recovered the genus as a non-eusauropod sauropod.[4] Holwerda and Pol (2018) concurred, recovering Amygdalodon as sister to Isanosaurus.[5]


  1. ^ A. Cabrera. 1947. Un saurópodo nuevo del Jurásico de Patagonia. Instituto del Museo de la Universidad Nacional de La Plata, Notas del Mueso de La Plata, Paleontología 12(95):1–17
  2. ^ Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press p. 176
  3. ^ Rauhut OWM. Revision of Amygdalodon patagonicus Cabrera, 1947 (Dinosauria, Sauropoda). Mitteilungen aus dem Museum für Naturkunde in Berlin, Geowissenschaftliche Reihe. 2003;6:173–181.
  4. ^ José Luis Carballido and Diego Pol (2010) "The dentition of Amygdalodon patagonicus (Dinosauria: Sauropoda) and the dental evolution in basal sauropods." Comptes Rendus Palevol 9: 83–93.
  5. ^ Femke M. Holwerda & Diego Pol (2018). Phylogenetic analysis of Gondwanan basal eusauropods from the Early-Middle Jurassic of Patagonia, Argentina. Spanish Journal of Palaeontology 33(2): 289-298. DOI: 10.7203/sjp.33.2.13604 Middle_Jurassic_of_Patagonia_Argentina

External links

  • DinoDictionary
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