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: 1211 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 494


    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 views57386
    Project overview5102
    Media views34894Media search (4471 views); M68274 (492 views); M68064 (704 views); M68279 (447 views); M68284 (463 views); M68277 (502 views); M68309 (1124 views); M85891 (452 views); M93556 (460 views); M93560 (458 views); M93564 (430 views); M93567 (478 views); M93568 (462 views); M93576 (494 views); M93693 (489 views); M93694 (529 views); M93692 (427 views); M68308 (510 views); M68311 (466 views); M68310 (412 views); M93553 (460 views); M68280 (490 views); M93578 (479 views); M68276 (460 views); M68278 (521 views); M68285 (450 views); M93577 (481 views); M68281 (449 views); M75918 (471 views); M68275 (457 views); M90595 (496 views); M90615 (441 views); M75921 (447 views); M68336 (452 views); M68273 (454 views); M68282 (466 views); M68283 (447 views); M68307 (458 views); M68312 (488 views); M75796 (475 views); M68320 (455 views); M75914 (527 views); M75915 (469 views); M75919 (437 views); M75920 (431 views); M85890 (497 views); M90594 (489 views); M90596 (465 views); M93554 (457 views); M93555 (475 views); M93557 (430 views); M93558 (484 views); M93559 (443 views); M93561 (450 views); M93562 (434 views); M93563 (416 views); M93565 (434 views); M93566 (412 views); M93569 (450 views); M93570 (412 views); M93573 (445 views); M93572 (434 views); M93571 (489 views); M93574 (401 views); M93575 (446 views);
    Views for media list3287
    Folio views3668Folio list (1059 views); Femoral cross-sections (479 views); Tibial cross-sections (476 views); Fibular cross-sections (421 views); Humeral cross-sections (426 views); Ulnar cross-sections (423 views); Rib cross-sections (384 views);
    Specimen list8311
    Taxon list1564
    Bibliography557
    Documents list3




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project435
    Media downloads193M68274 (5 downloads); M68064 (16 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 downloads242