Kambara

Kambara
Temporal range: Eocene - Oligocene
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Crocodilia
Family: Crocodylidae
Subfamily: †Mekosuchinae
Genus: †Kambara
Willis et al., 1993
Species
  • †K. murgonensis Willis et al., 1993 (type)
  • †K. implexidens Salisbury & Willis, 1996
  • †K. molnari Holt et al., 2005
  • †K. taraina Buchanan, 2009

Kambara is an extinct genus of mekosuchine crocodylian that lived during the Eocene and Oligocene epochs in Australia.

At around 55 million years old, remains of Kambara are among the oldest Tertiary fossils found in Australia (although there are some recent Cretaceous fossils that are twice that age). Kambara is the oldest known mekosuchine. The genus name comes from an Aboriginal term meaning "crocodile".

There are currently four species of Kambara described: the type species K. murgonensis (Willis & Molnar, 1993), K. implexidens (Salisbury & Willis, 1996), K. molnari (Holt et al., 2005), and K. taraina (Buchanan, 2009). All four species have a generalised crocodylian body plan, growing to sizes similar to the modern Saltwater Crocodile, Crocodylus porosus. Kambara shows an interesting characteristic of having multiple bite patterns within the same genus. Kambara murgonensis has a near complete overbite, K. implexidens a more interlocking dentition and K. molnarai an intermediate condition. While initially thought to be the most primitive member of an Australasian radiation of mekosuchine crocodylians, recent studies (Holt, et al., 2007) have suggested that this may not be the case, and that there are at least two separate lineages in Australia.

Kambara and other mekosuchines are often thought to have been better adapted to movement on land than are living crocodilians. The degree of twisting or torsion in the humerus of Kambara is less than that of living crocodilians, and the shoulder joint of Kambara is stronger and allows for greater motion than those of modern species. However, Kambara is still thought to have been at least partially aquatic because its head is flattened like that of typical aquatic crocodilians.[1]

Fossils have been found at the Murgon fossil site in south-eastern Queensland.

References

  1. ↑ Stein, M.; Salisbury, S. W.; Hand, S. J.; Archer, M.; Godthelp, H. (2012). "Humeral morphology of the early Eocene mekosuchine crocodylianKambarafrom the Tingamarra Local Fauna southeastern Queensland, Australia". Alcheringa: an Australasian Journal of Palaeontology: 1. doi:10.1080/03115518.2012.671697.


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