Project 494: Sarah Werning. 2012. The ontogenetic osteohistology of Tenontosaurus tilletti. PLOS ONE. 7 (3):e33539.
Specimen: † Tenontosaurus tilletti (OMNH:63525)
View: Tibia: cross-section, mid-diaphysis


Tenontosaurus tilletti is an ornithopod dinosaur known from the Early Cretaceous (Aptian-Albian) Cloverly and Antlers formations of the Western United States. It is represented by a large number of specimens spanning a number of ontogenetic stages, and these specimens have been collected across a wide geographic range (from central Montana to southern Oklahoma). Here I describe the long bone histology of T. tilletti and discuss histological variation at the individual, ontogenetic and geographic levels. The ontogenetic pattern of bone histology in T. tilletti is similar to that of other
dinosaurs, reflecting extremely rapid growth early in life, and sustained rapid growth through sub-adult ontogeny. But unlike other iguanodontians, this dinosaur shows an extended multi-year period of slow growth as skeletal maturity approached. Evidence of termination of growth (e.g., an external fundamental system) is observed in only the largest individuals, although other histological signals in only slightly smaller specimens suggest a substantial slowing of growth later in life. Histological differences in the amount of remodeling and the number of lines of arrested growth varied among elements within individuals, but bone histology was conservative across sampled individuals of the species, despite known paleoenvironmental differences between the Antlers and Cloverly formations. The bone histology of T. tilletti indicates a much slower growth trajectory than observed for other iguanodontians (e.g., hadrosaurids), suggesting that those taxa reached much larger sizes than Tenontosaurus in a shorter time.

Read the article »

Project DOI: 10.7934/P494,
This project contains
  • 64 Media
  • 6 Folios
  • 1 Taxon
  • 18 Specimens
Total size of project's media files: 1211 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 494


    member name taxa specimens media media
    Sarah Werning
    Project Administrator
    Last logged in 03/28/12

    Project has no matrices defined.

    Project views

    type number of views Individual items viewed (where applicable)
    Total project views54355
    Project overview4759
    Media views33299Media search (4271 views); M68274 (469 views); M68064 (679 views); M68279 (423 views); M68284 (444 views); M68277 (481 views); M68309 (1070 views); M85891 (430 views); M93556 (436 views); M93560 (435 views); M93564 (412 views); M93567 (464 views); M93568 (446 views); M93576 (471 views); M93693 (472 views); M93694 (510 views); M93692 (412 views); M68308 (488 views); M68311 (442 views); M68310 (387 views); M93553 (436 views); M68280 (467 views); M93578 (460 views); M68276 (438 views); M68278 (499 views); M68285 (426 views); M93577 (461 views); M68281 (423 views); M75918 (449 views); M68275 (436 views); M90595 (474 views); M90615 (417 views); M75921 (427 views); M68336 (430 views); M68273 (434 views); M68282 (442 views); M68283 (424 views); M68307 (435 views); M68312 (467 views); M75796 (456 views); M68320 (435 views); M75914 (501 views); M75915 (447 views); M75919 (414 views); M75920 (409 views); M85890 (475 views); M90594 (464 views); M90596 (439 views); M93554 (432 views); M93555 (452 views); M93557 (407 views); M93558 (461 views); M93559 (423 views); M93561 (429 views); M93562 (412 views); M93563 (397 views); M93565 (417 views); M93566 (397 views); M93569 (433 views); M93570 (395 views); M93573 (426 views); M93572 (415 views); M93571 (467 views); M93574 (382 views); M93575 (427 views);
    Views for media list3111
    Folio views3505Folio list (1008 views); Femoral cross-sections (461 views); Tibial cross-sections (455 views); Fibular cross-sections (404 views); Humeral cross-sections (405 views); Ulnar cross-sections (405 views); Rib cross-sections (367 views);
    Specimen list7844
    Taxon list1325

    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project413
    Media downloads191M68274 (5 downloads); M68064 (14 downloads); M68279 (4 downloads); M68284 (4 downloads); M68277 (8 downloads); M68309 (13 downloads); M85891 (2 downloads); M93556 (3 downloads); M93560 (2 downloads); M93564 (2 downloads); M93567 (2 downloads); M93568 (3 downloads); M93693 (4 downloads); M93694 (3 downloads); M93692 (3 downloads); M68308 (6 downloads); M68276 (4 downloads); M68281 (6 downloads); M68273 (4 downloads); M68275 (4 downloads); M68278 (5 downloads); M68280 (4 downloads); M68282 (3 downloads); M68283 (3 downloads); M68285 (7 downloads); M68307 (4 downloads); M68310 (1 download); M68311 (1 download); M68312 (1 download); M68320 (1 download); M68336 (3 downloads); M75796 (2 downloads); M75914 (3 downloads); M75915 (4 downloads); M75918 (5 downloads); M75919 (6 downloads); M75920 (4 downloads); M75921 (5 downloads); M85890 (1 download); M90594 (3 downloads); M90595 (1 download); M90596 (2 downloads); M90615 (2 downloads); M93553 (1 download); M93554 (1 download); M93555 (1 download); M93557 (1 download); M93558 (2 downloads); M93559 (2 downloads); M93561 (1 download); M93562 (1 download); M93563 (1 download); M93565 (1 download); M93566 (1 download); M93569 (1 download); M93570 (1 download); M93571 (1 download); M93572 (1 download); M93573 (1 download); M93574 (1 download); M93575 (2 downloads); M93576 (1 download); M93577 (1 download); M93578 (1 download);
    Project downloads222