Project 494: Werning, Sarah. 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: 1203 MB
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 views2264
Project overview278
Media views1277Media search (257 views); M68274 (18 views); M68064 (35 views); M68279 (20 views); M68284 (13 views); M68277 (16 views); M68309 (45 views); M85891 (12 views); M93556 (15 views); M93560 (15 views); M93564 (15 views); M93567 (15 views); M93568 (24 views); M93576 (16 views); M93693 (13 views); M93694 (21 views); M93692 (14 views); M68308 (22 views); M68311 (19 views); M68310 (12 views); M93553 (12 views); M68280 (18 views); M93578 (13 views); M68276 (23 views); M68278 (22 views); M68285 (16 views); M93577 (15 views); M68281 (18 views); M75918 (18 views); M68275 (17 views); M90595 (12 views); M90615 (10 views); M75921 (15 views); M68336 (16 views); M68273 (16 views); M68282 (17 views); M68283 (14 views); M68307 (15 views); M68312 (20 views); M75796 (17 views); M68320 (9 views); M75914 (17 views); M75915 (15 views); M75919 (17 views); M75920 (20 views); M85890 (11 views); M90594 (8 views); M90596 (12 views); M93554 (17 views); M93555 (16 views); M93557 (13 views); M93558 (10 views); M93559 (16 views); M93561 (12 views); M93562 (13 views); M93563 (14 views); M93565 (12 views); M93566 (12 views); M93569 (12 views); M93570 (13 views); M93573 (15 views); M93572 (13 views); M93571 (13 views); M93574 (12 views); M93575 (14 views);
Views for media list149
Folio views158Folio list (60 views); Femoral cross-sections (24 views); Tibial cross-sections (21 views); Fibular cross-sections (17 views); Humeral cross-sections (12 views); Ulnar cross-sections (13 views); Rib cross-sections (11 views);
Specimen list350
Taxon list52

Project downloads

type number of downloads Individual items downloaded (where applicable)
Total downloads from project133
Media downloads125M68274 (3 downloads); M68064 (10 downloads); M68279 (2 downloads); M68284 (3 downloads); M68277 (2 downloads); M68309 (7 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 (3 downloads); M68276 (2 downloads); M68281 (5 downloads); M68273 (2 downloads); M68275 (2 downloads); M68278 (3 downloads); M68280 (1 download); M68282 (2 downloads); M68283 (2 downloads); M68285 (1 download); M68307 (2 downloads); M68310 (1 download); M68311 (1 download); M68312 (1 download); M68320 (1 download); M68336 (1 download); M75796 (1 download); M75914 (2 downloads); M75915 (2 downloads); M75918 (4 downloads); M75919 (3 downloads); M75920 (2 downloads); M75921 (3 downloads); M85890 (1 download); M90594 (1 download); M90595 (1 download); M90596 (1 download); M90615 (1 download); M93553 (1 download); M93554 (1 download); M93555 (1 download); M93557 (1 download); M93558 (1 download); 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 (1 download); M93576 (1 download); M93577 (1 download); M93578 (1 download);
Project downloads8