Home > Uncategorized > Almost Done Aging Our Dinosaurs!

Almost Done Aging Our Dinosaurs!

Thank you to Rob Taylor, David Button, Christian Foth, ReBecca Hunt, Chris Noto, and Jordan Mallon for their work filling in the ages/dates for our dinosaur spreadsheet, as well as helping to update some of the taxonomy. We have just a handful of taxa to deal with now. These include:

  • Finding the ages of: Dyoplosaurus, Zhejiangosaurus, Pseudolagosuchus, Mandschurosaurus, Camptosaurus aphanoectes, Machaeroprosopus, Pantydraco, Loricatosaurus, and Stegosaurus mjosi.
  • How should we treat Iguanodon hollingtonensis? It’s synonymized with I. fittoni, but is that even a valid species anymore?

If you know of any references that can help answer these questions, please feel free to enter the data on the Google Spreadsheet. Thank you!

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Categories: Uncategorized
  1. Rob Taylor
    March 5, 2010 at 6:14 am | #1

    I just completed entries for Dyoplosaurus, Zhejiangosaurus, Pseudolagosuchus, Pantydraco, Loricatosaurus, and Stegosaurus mjosi, so we should be getting pretty close!

  2. March 5, 2010 at 10:32 pm | #2

    I don’t want to botch something (since I apparently can’t even spell my name correctly), so I’ll just put these here.

    *Camptosaurus aphanoectes: Morrison Formation, early Tithonian. P. 228 in Carpenter and Wilson, 2008.

    Carpenter, K. and Wilson, Y. 2008. A new species of Camptosaurus (Ornithopoda: Dinosauria) from the Morrison Formation (Upper Jurassic) of Dinosaur National Monument, Utah, and a biomechanical analysis of its forelimb. Annals of the Carnegie Museum 76:227-263

    *Iguanodon hollingtoniensis (double-checked, i before ensis): In the most recent report, Galton (2009) used it as “I.” hollingtoniensis, citing the potential inadequacy of the type ilium of I. fittoni and the need for review of Wadhurt Clay iguanodont material as reasons (p. 246). The age and horizon are: Wadhurst Clay, middle Valanginian (p. 245).

    I. hollingtoniensis was also left separate from I. fittoni by Paul (2008) (p. 193, 202).

    Paul, G. S. (2008). “A revised taxonomy of the iguanodont dinosaur genera and species”. Cretaceous Research 29 (2): 192–216.

    Galton, P. M. (2009). “Notes on Neocomian (Late Cretaceous) ornithopod dinosaurs from England – Hypsilophodon, Valdosaurus, “Camptosaurus”, “Iguanodon” – and referred specimens from Romania and elsewhere”. Revue de Paléobiologie 28 (1): 211–273.

    *Orodromeus makelai: the taxon is double-listed and is not from the Blackleaf Fm. The Dinosauria II (p. 395) has it in the Oldman Fm, the Dinosaur Park Fm, the Horseshoe Canyon Fm, the Judith River Fm, and the Two Medicine Fm (middle Camp-early Maas).

    *Thescelosaurus neglectus: the possible late Campanian record of Thescelosaurus neglectus was based on teeth from the Judith River Fm which Galton later reassigned to Orodromeus makelai (Galton 1995).

    Galton, P. M. 1995. “The species of the basal hypsilophodontid dinosaur Thescelosaurus Gilmore (Ornithischia: Ornithopoda) from the Late Cretaceous of North America.” Neues Jahrbuch für Geologie und Paláontologie Abhandlungen 198(3): 297-311.

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