Amygdalodon

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Amygdalodon
Temporal range: Toarcian
~180–172 Ma
Scientific classification
Kingdom:
Phylum:
Class:
Order:
Suborder:
Infraorder:
Genus:
Amygdalodon
Species:
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.

Discovery[edit]

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.

Size[edit]

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]

Classification[edit]

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]

References[edit]

  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 https://www.researchgate.net/publication/330520139_Phylogenetic_analysis_of_Gondwanan_basal_eusauropods_from_the_Early Middle_Jurassic_of_Patagonia_Argentina

External links[edit]