Centrosaurinae
Encyclopedia
The Centrosaurinae is a subfamily of ceratopsid dinosaur
s named by paleontologist Lawrence Lambe
, in 1915, with Centrosaurus
as the type genus. The centrosaurines are further divided into two tribes, the centrosaurins and the pachyrhinosaurins.
presented here follows a 2011 phylogenetic analysis by Fiorillo and Tykoski.
. Research indicates that centrosaurines did not achieve adult morphology with its accompanying mating signals until nearly fully grown. Relative age of the animals was determined based on the size, degree of coossification, secondary ossification, and growth related changes in bone texture. Sampson finds commonality between the retarded growth of mating signals in centrosaurines and the extended adolescence
of animals whose social structures are ranked hierarchies founded on age-related differences. In these sorts of groups young males are typically sexually mature for several years before actually beginning to breed, when their mating signals are most fully developed. Females, by contrast due not have such an extended adolescence.
Dinosaur
Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of...
s named by paleontologist Lawrence Lambe
Lawrence Lambe
Lawrence Morris Lambe was a Canadian geologist and palaeontologist from the Geological Survey of Canada .His published work, describing the diverse and plentiful dinosaur discoveries from the fossil beds in Alberta, did much to bring dinosaurs into the public eye and helped usher in the Golden...
, in 1915, with Centrosaurus
Centrosaurus
Centrosaurus is a genus of herbivorous ceratopsian dinosaurs from the late Cretaceous of Canada. Their remains have been found in the Dinosaur Park Formation and uppermost Oldman Formation, dating from 76.5 to 75.5 million years ago....
as the type genus. The centrosaurines are further divided into two tribes, the centrosaurins and the pachyrhinosaurins.
Classification
The cladogramCladogram
A cladogram is a diagram used in cladistics which shows ancestral relations between organisms, to represent the evolutionary tree of life. Although traditionally such cladograms were generated largely on the basis of morphological characters, DNA and RNA sequencing data and computational...
presented here follows a 2011 phylogenetic analysis by Fiorillo and Tykoski.
Reproduction
Possible neonate sized centrosaurine fossils have been documented in the scientific literatureScientific literature
Scientific literature comprises scientific publications that report original empirical and theoretical work in the natural and social sciences, and within a scientific field is often abbreviated as the literature. Academic publishing is the process of placing the results of one's research into the...
. Research indicates that centrosaurines did not achieve adult morphology with its accompanying mating signals until nearly fully grown. Relative age of the animals was determined based on the size, degree of coossification, secondary ossification, and growth related changes in bone texture. Sampson finds commonality between the retarded growth of mating signals in centrosaurines and the extended adolescence
Adolescence
Adolescence is a transitional stage of physical and mental human development generally occurring between puberty and legal adulthood , but largely characterized as beginning and ending with the teenage stage...
of animals whose social structures are ranked hierarchies founded on age-related differences. In these sorts of groups young males are typically sexually mature for several years before actually beginning to breed, when their mating signals are most fully developed. Females, by contrast due not have such an extended adolescence.