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 views62249
    Project overview5679
    Media views37233Media search (4803 views); M68274 (528 views); M68064 (746 views); M68279 (474 views); M68284 (499 views); M68277 (540 views); M68309 (1197 views); M85891 (478 views); M93556 (496 views); M93560 (479 views); M93564 (451 views); M93567 (502 views); M93568 (480 views); M93576 (516 views); M93693 (529 views); M93694 (552 views); M93692 (448 views); M68308 (543 views); M68311 (514 views); M68310 (448 views); M93553 (487 views); M68280 (528 views); M93578 (498 views); M68276 (493 views); M68278 (560 views); M68285 (480 views); M93577 (505 views); M68281 (507 views); M75918 (500 views); M68275 (497 views); M90595 (523 views); M90615 (474 views); M75921 (484 views); M68336 (488 views); M68273 (486 views); M68282 (518 views); M68283 (483 views); M68307 (499 views); M68312 (521 views); M75796 (500 views); M68320 (490 views); M75914 (575 views); M75915 (502 views); M75919 (466 views); M75920 (465 views); M85890 (527 views); M90594 (521 views); M90596 (504 views); M93554 (493 views); M93555 (507 views); M93557 (459 views); M93558 (515 views); M93559 (466 views); M93561 (479 views); M93562 (457 views); M93563 (436 views); M93565 (447 views); M93566 (431 views); M93569 (470 views); M93570 (428 views); M93573 (469 views); M93572 (459 views); M93571 (524 views); M93574 (423 views); M93575 (466 views);
    Views for media list3636
    Folio views4035Folio list (1168 views); Femoral cross-sections (516 views); Tibial cross-sections (521 views); Fibular cross-sections (466 views); Humeral cross-sections (469 views); Ulnar cross-sections (478 views); Rib cross-sections (417 views);
    Specimen list9125
    Taxon list1870
    Bibliography670
    Documents list1




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project488
    Media downloads212M68274 (6 downloads); M68064 (17 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 downloads276