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

Abstract

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, http://dx.doi.org/10.7934/P494
This project contains
  • 64 Media
  • 6 Folios
  • 1 Taxon
  • 18 Specimens
Total size of project's media files: 1.15G

Download Project SDD File
Currently Viewing:
MorphoBank Project 494

    Authors' Institutions

    • University of Oklahoma



    Members

    member name taxa specimens media media
    notes
    Sarah Werning
    Project Administrator
    Last logged in 03/28/12
    1186461


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views66869
    Project overview5960
    Media views40101Media search (5177 views); M68274 (570 views); M68064 (789 views); M68279 (514 views); M68284 (539 views); M68277 (579 views); M68309 (1259 views); M85891 (523 views); M93556 (538 views); M93560 (511 views); M93564 (482 views); M93567 (529 views); M93568 (510 views); M93576 (552 views); M93693 (554 views); M93694 (586 views); M93692 (474 views); M68308 (587 views); M68311 (556 views); M68310 (489 views); M93553 (535 views); M68280 (574 views); M93578 (528 views); M68276 (534 views); M68278 (601 views); M68285 (520 views); M93577 (536 views); M68281 (548 views); M75918 (542 views); M68275 (540 views); M90595 (566 views); M90615 (516 views); M75921 (528 views); M68336 (532 views); M68273 (528 views); M68282 (562 views); M68283 (522 views); M68307 (540 views); M68312 (566 views); M75796 (538 views); M68320 (528 views); M75914 (622 views); M75915 (538 views); M75919 (511 views); M75920 (504 views); M85890 (576 views); M90594 (568 views); M90596 (552 views); M93554 (543 views); M93555 (550 views); M93557 (504 views); M93558 (562 views); M93559 (503 views); M93561 (512 views); M93562 (491 views); M93563 (469 views); M93565 (477 views); M93566 (469 views); M93569 (504 views); M93570 (459 views); M93573 (497 views); M93572 (489 views); M93571 (549 views); M93574 (454 views); M93575 (496 views);
    Views for media list3890
    Folio views4348Folio list (1250 views); Femoral cross-sections (549 views); Tibial cross-sections (568 views); Fibular cross-sections (513 views); Humeral cross-sections (504 views); Ulnar cross-sections (522 views); Rib cross-sections (442 views);
    Specimen list9858
    Taxon list1976
    Bibliography735
    Documents list1




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project523
    Media downloads213M68274 (6 downloads); M68064 (18 downloads); M68279 (4 downloads); M68284 (4 downloads); M68277 (8 downloads); M68309 (14 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 (9 downloads); M68276 (4 downloads); M68281 (6 downloads); M68273 (4 downloads); M68275 (5 downloads); M68278 (5 downloads); M68280 (5 downloads); M68282 (3 downloads); M68283 (3 downloads); M68285 (7 downloads); M68307 (7 downloads); M68310 (1 download); M68311 (1 download); M68312 (1 download); M68320 (1 download); M68336 (3 downloads); M75796 (2 downloads); M75914 (4 downloads); M75915 (5 downloads); M75918 (6 downloads); M75919 (8 downloads); M75920 (5 downloads); M75921 (6 downloads); M85890 (1 download); M90594 (3 downloads); M90595 (1 download); M90596 (2 downloads); M90615 (3 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 downloads310