Project 2326: K. Curry Rogers, M. Whitney, M. DEmic, B. Bagley. 2016. Precocity in a tiny titanosaur from the Cretaceous of Madagascar. Science. 352 (6284):450-453.
Specimen: † Rapetosaurus krausei (UA - Universite d'Antananarivo:UA 9998)
View: Right Humerus 95259


Sauropod dinosaurs exhibit an ontogenetic size variation exceeding that for other vertebrates, but very young individuals are required to clarify mechanisms underlying this pattern. A new specimen of Rapetosaurus krausei sheds light on the life of one of the littlest, largest vertebrates. Bones record rapid growth rates as well as the first hatchling lines in a non-avian dinosaur, indicating that Rapetosaurus was only ~2.5 kg at hatching, and obtained a mass of ~40 kg and was ~ 35 cm tall at the hip when it died. Cortical remodeling, limb isometry, and calcified hypertrophic metaphyseal cartilages indicate an active, precocial growth strategy for this fledgling. Characteristically thin cartilage may also signal a temporary reduction in bone elongation in response to starvation within the drought-stressed Cretaceous ecosystem in which Rapetosaurus perished.

Read the article »

Article DOI: 10.1126/science.aaf1509

Project DOI: 10.7934/P2326,
This project contains
  • 31 Media
  • 1 Taxon
  • 1 Specimen
Total size of project's media files: 577.24M

Download Project SDD File
Currently Viewing:
MorphoBank Project 2326

    Authors' Institutions

    • University of Minnesota

    • University of Washington

    • Macalester College

    • Adelphi University


    member name taxa specimens media media
    Kristi Curry Rogers
    Project Administrator
    Last logged in 05/17/16
    Michael D'Emic
    Full membership
    Last logged in 03/22/16

    Project has no matrices defined.

    Project views

    type number of views Individual items viewed (where applicable)
    Total project views21571
    Project overview2563
    Media views13573Media search (2617 views); M410718 (358 views); M410837 (326 views); M410832 (390 views); M410726 (355 views); M410730 (359 views); M410838 (364 views); M410729 (372 views); M410833 (337 views); M410728 (343 views); M406473 (355 views); M410834 (341 views); M410727 (359 views); M406478 (371 views); M406477 (369 views); M410735 (347 views); M410725 (348 views); M410719 (425 views); M410732 (348 views); M410731 (367 views); M406476 (316 views); M410831 (371 views); M406480 (408 views); M410835 (351 views); M410736 (324 views); M410734 (337 views); M406479 (330 views); M410733 (304 views); M410737 (377 views); M410739 (346 views); M410836 (336 views); M406475 (322 views);
    Taxon list907
    Specimen list1052
    Views for media list2237

    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project186
    Project downloads177
    Media downloads9M410729 (1 download); M410734 (4 downloads); M410736 (1 download); M410733 (2 downloads); M410739 (1 download);