Diplocynodon

Nephrozoa

Diplocynodon
Temporal range: Paleocene–Middle Miocene
Diplocynodon darwini
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Crocodylomorpha
Order: Crocodylia
Superfamily: Alligatoroidea
Subfamily: Diplocynodontinae
Genus: Diplocynodon
Pomel, 1847
Species
  • D. dalpiazi Del Favero, 1999
  • D. darwini (Ludvig, 1877)
  • D. elavericus Martin, 2010
  • D. gervaisi
  • D. hantoniensis (Wood, 1846)
  • D. muelleri (Kälin, 1936)
  • D. ratelii Pomel, 1847 (type)
  • D. tormis
  • D. ungeri (Prangner, 1845)
Synonyms
  • Caimanosuchus
  • Enneodon Pranger, 1845
  •  ?Hispanochampsa Kälin, 1936
  • Saurocainus

Diplocynodon is an extinct genus of alligatoroid that lived during the Paleocene to middle Miocene 49 million years ago in Europe. It looked very similar to the modern caiman in that it was small and had bony armour scutes covering its neck, back, belly, and tail. The longest Diplocynodon recovered was 4 feet in length and probably fed on fish, animal flesh, and took insects when young.

In the nineteenth century, D. steineri was named from Styria, Austria and D. styriacus was named from Austria and France. A third Austrian species, Enneodon ungeri, was placed in its own genus. The Austrian and French species of Diplocynodon were synonymized with E. ungeri in 2011, and because the name Diplocynodon has priority over Enneodon, the species is now called D. ungeri. [1]

Well preserved specimens have been found in the Messel Pit in Germany. In the Eocene epoch, the pit was a swampy freshwater lake that was perfect for preserving fossils due to anoxic conditions at its bottom.

Contents

Species

Species
Species Age Location Unit Notes Images

D. dalpiazi

Late Rupelian

 Italy

Monteviale

D. darwini

Lutetian

 Germany

Messel pit

All specimens are from Messel pit of Germany. Synonyms are: Caimanosuchus brevirostris, D. ebertsi and D. hallense.

D. elavericus[2]

Middle Priabonian

 France

Domérat

All specimens came from Allier, Massif Central of France.

D. gervaisi

Earliest Rupelian

 France

Ronzon

Synonyms are: Saurocainus gervaisi.

D. hantoniensis

Early Priabonian

 United Kingdom

Headon Hill Formation

All specimens came from Hordwell, southern England. D. cf. hantoniensis is known from the Oligocene of Dordogne, France.

D. muelleri[3]

Middle Rupelian

 Spain

El Talladell

More than 100 are known, all from Lleida Province, Catalonia. Synonyms are: Hispanochampsa muelleri, D. guerini and D. marini.

D. ratelii

 France

Saint-Gérand-le-Puy*

D. ratelii is the type species of Diplocynodon. Most of the specimens came from Allier, Massif Central of France. Synonyms are: D. gracile.

D. tormis

Late Bartonian

 Spain

Salamanca

D. ungeri[1]

Middle Miocene

Synonyms are: Enneodon ungeri, D. steineri, and D. styriacus (see text).

*Locality and/or horizon of the type specimen.

Phylogeny

Cladogram based on Martin, 2010:[2]

Alligatoroidea

Leidyosuchus




Globidonta


Diplocynodontidae

Baryphracta


Diplocynodon

D. darwini





D. hantoniensis



D. ratelii





D. elavericus




D. muelleri



D. tormis









References

External links