Poekilopleuron

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Poekilopleuron bucklandii
Temporal range:
Middle Jurassic 168-166 mya
Poekilopleuron bucklandi.JPG
Reconstructed ribcage
Scientific classification
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Genus:
Poekilopleuron

Eudes-Deslongchamps, 1836
Synonyms

Poekilopleuron (meaning "varied ribs") is a megalosauroid dinosaur. The genus has been used under many different spelling variants, although only one, Poekilopleuron, is valid. The type species is P. bucklandii (see also Megalosaurus), named after William Buckland, and many junior synonyms of it have also been erected. Few material is currently known, as the holotype was destroyed in World War II, although many casts of the material still exist.

Discovery and naming[change | change source]

Poekilopleuron is a genus of theropod with a long and complex history. The genus was first named and described by Jacques-Amand Eudes-Deslongchamps in a report published in 1836,[1][2] based on holotype material that is now destroyed. In 1837, Eudes-Deslongchamps published a more detailed account of this discovery in a monograph[3] which was also inserted next year in volume 6 of the "Mémoires de la Société Linnéenne Normandie".[4]

The holotype, which was housed in Musée de la Faculté des Sciences de Caen and destroyed during World War II, included gastralia, phalanges, a left forelimb, caudal vertebrae, chevrons, ribs and a hindlimb. Of all the material, few is still preserved, although the gastralia, phalanges and forelimb were casted.[5][6]

In the same 1836 publication, Eudes-Deslongchamps also named the type species of Poekilopleuron, P. bucklandii.[7][8] Eudes-Deslongchapms noted similarities with some material of Megalosaurus bucklandii and Poekilopleuron, and chose the species name bucklandii for Poekilopleuron, so that it the two genera were synonymized, only the genus name would be suppressed.[5] The generic name is derived from Greek ποίκιλος, poikilos, "varied", and πλευρών, pleuron, "rib", a reference to the three types of rib present. The specific name, honouring William Buckland, was deliberately identical to that of Megalosaurus bucklandii.[source?]

References[change | change source]

  1. Eudes-Deslongchamps J.-A. (1836). "Plusieurs parties d’un mémoire sur un très-grand animal fossile découvert, l’an dernier, dans les carrières de la Maladrerie à un quart de lieu de Caen.". Analyse des travaux de la Société pendant l’année académique 1835–1836, Séance Publique de la Société Linnéenne de Normandie tenue à Vire le 24 mai 1836: 14-25. 
  2. Brignon A. (2018). "New historical data on the first dinosaurs found in France.". BSGF - Earth Sciences Bulletin 189 (4). doi:10.1051/bsgf/2018003. 
  3. Eudes-Deslongchamps J.-A. (1837) Mémoire sur le Poekilopleuron bucklandii, grand saurien fossile, intermédiaire entre les crocodiles et les lézards. A. Hardel, Caen, 114 p., 8 pl.
  4. Eudes-Deslongchamps J.-A. (1838). "Mémoire sur le Poekilopleuron bucklandii, grande saurien fossile, intermédiaire entre les crocodiles et les lézards, découvert dans les carrières de la Maladrerie, près Caen, au mois de juillet 1835". Mémoires de la Société Linnéenne Normandie 6: 37–146, 8 pl.. 
  5. 5.0 5.1 Allain R.; Chure D. J. (2002). "Poekilopleuron bucklandii, the theropod dinosaur from the Middle Jurassic (Bathonian) of Normandy". Palaeontology 45 (6): 1107–1121. doi:10.1111/1475-4983.00277. http://onlinelibrary.wiley.com/store/10.1111/1475-4983.00277/asset/1475-4983.00277.pdf?v=1&t=i2dzwi7m&s=aca73275969683bed25709a4221ac78193a13989. 
  6. Holtz, T.R. Jr (2012). "Updated genus list for Holtz (2007) Dinosaurs" (PDF). University of Maryland. p. 8.
  7. Eudes-Deslongchamps J.-A. (1836). "Plusieurs parties d’un mémoire sur un très-grand animal fossile découvert, l’an dernier, dans les carrières de la Maladrerie à un quart de lieu de Caen.". Analyse des travaux de la Société pendant l’année académique 1835–1836, Séance Publique de la Société Linnéenne de Normandie tenue à Vire le 24 mai 1836: 14-25. 
  8. Brignon A. (2018). "New historical data on the first dinosaurs found in France.". BSGF - Earth Sciences Bulletin 189 (4). doi:10.1051/bsgf/2018003.