Growth curve of Psittacosaurus mongoliensis Osborn (Ceratopsia : Psittacosauridae) inferred from long bone histology

Citation
Gm. Erickson et Ta. Tumanova, Growth curve of Psittacosaurus mongoliensis Osborn (Ceratopsia : Psittacosauridae) inferred from long bone histology, ZOOL J LINN, 130(4), 2000, pp. 551-566
Citations number
63
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences
Journal title
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN journal
0024-4082 → ACNP
Volume
130
Issue
4
Year of publication
2000
Pages
551 - 566
Database
ISI
SICI code
0024-4082(200012)130:4<551:GCOPMO>2.0.ZU;2-7
Abstract
The skeleton undergoes substantial histological modification during ontogen y in association with longitudinal growth, shape changes, reproductive acti vity, and fatigue repair. This variation can hinder attempts to reconstruct life history attributes for individuals, particularly when only fossil mat erials are availale for study. Histological examinations of multiple elemen ts throughout development provide a means to control for such variability a nd facilitate accurate life history assessments. In the present study, the microstructure of various major long bones of the ceratopsian Psittacosauru s monogoliensis Osborn were examined from a growth series spanning juvenile through adult developmental stages. The first reconstruction of a growth c urve (mass vs. age) for a dinosaur was made for this taxon using a new meth od called Developmental Mass Extrapolation. The results suggest P. mongolie nsis: (1) had an S-shaped growth curve characteristics of most extant verte brates, and (2) had maximal growth rates that exceeded extant reptiles and marsupials, but were slower than most avian and eutherian taxa. (C) 2000 Th e Linnean Society of London.