2010
DOI: 10.1111/j.1096-3642.2009.00611.x
|View full text |Cite
|
Sign up to set email alerts
|

Abstract: The cranial anatomy of the helmet-crested lambeosaurine Hypacrosaurus altispinus (Ornithischia: Hadrosauridae) is described, with a focus on ontogenetic and individual variation in phylogenetically significant characters of the cranial crest, braincase, and facial skeleton. Cranial material of H. altispinus represents a relatively complete growth series that includes crestless juveniles of less than half the size of large individuals with fully developed crests. Cranial ontogeny is compared with other lambeosa… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

15
204
1
2

Year Published

2010
2010
2022
2022

Publication Types

Select...
8
1

Relationship

4
5

Authors

Journals

citations
Cited by 89 publications
(222 citation statements)
references
References 43 publications
(153 reference statements)
15
204
1
2
Order By: Relevance
“…Similarly, Mallon et al (in press) described a specimen of Arrhinoceratops at circa 70% of adult size but where the frill was less than 50% of that of the adult, and the horns 30% of that of the adult (their figure 10), implying relatively rapid growth late in ontogeny. Evans (2010) also found strong positive allometry in the development of the crests of a number of hadrosaur genera with increases in size and changes in shape relatively late in ontogeny and juveniles exhibiting no, or only incipient, crests. Although not discussed in terms of possible functions by Evans (2010), the implications are similar to those discussed here, and it is possible to infer that these were selected for socio-sexual dominance.…”
Section: Discussionmentioning
confidence: 81%
“…Similarly, Mallon et al (in press) described a specimen of Arrhinoceratops at circa 70% of adult size but where the frill was less than 50% of that of the adult, and the horns 30% of that of the adult (their figure 10), implying relatively rapid growth late in ontogeny. Evans (2010) also found strong positive allometry in the development of the crests of a number of hadrosaur genera with increases in size and changes in shape relatively late in ontogeny and juveniles exhibiting no, or only incipient, crests. Although not discussed in terms of possible functions by Evans (2010), the implications are similar to those discussed here, and it is possible to infer that these were selected for socio-sexual dominance.…”
Section: Discussionmentioning
confidence: 81%
“…Cranial growth series for these taxa show that the taxonomically distinctive cranial crests, commonly cited as the most valuable feature in species identification, developed late in ontogeny (Ostrom 1961(Ostrom , 1962Dodson 1975;Hopson 1975;Evans et al 2005;Evans 2006;Evans 2010). When the small, incipiently crested specimens were first recognised as juveniles of larger, crested taxa (Dodson 1975), their precise taxonomic identification was difficult due to the lack of a fully developed crest with a diagnostic profile .…”
Section: Introductionmentioning
confidence: 97%
“…The lambeosaurine hadrosaurids Corythosaurus, Lambeosaurus and Hypacrosaurus are represented by numerous articulated skulls and skeletons recovered from Upper Cretaceous strata of western North America (Lull and Wright 1942;Dodson 1975;Evans et al 2005;Evans 2010). Cranial growth series for these taxa show that the taxonomically distinctive cranial crests, commonly cited as the most valuable feature in species identification, developed late in ontogeny (Ostrom 1961(Ostrom , 1962Dodson 1975;Hopson 1975;Evans et al 2005;Evans 2006;Evans 2010).…”
Section: Introductionmentioning
confidence: 98%
“…However, a preliminary assessment of the body size distribution and ontogenetic status of hadrosaurid specimens collected from two of the Day Digs bonebeds (BF and FC) was carried out on the small sample of prepared jaw, limb, and girdle bones in the TMP collections (Table S1 2 ). Categorization of ontogenetic status follows Horner et al (2000) and Evans (2010) in that adults are considered greater than 85% an adult size standard (represented here by CMN 2289, the paratype of Edmontosaurus regalis), subadults are defined as being between 85% and 50% adult size, and juveniles are below 50% adult size.…”
Section: Methodsmentioning
confidence: 99%