Brian T Shea
Biographic Data
| ID | 3581098 |
|---|---|
| NAME | Brian T Shea |
| GIVEN NAMES | Brian T |
| FAMILY NAME | Shea |
| SIGNATURE | SHEA B T |
| AFFILIATIONS | Northwestern University |
| VERIFIED | No |
| TOTAL WORKS | 29 |
| TOTAL CITATIONS | 471 |
| AUTHOR COUNT | 29 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1977 |
| LATEST PUBLICATION YEAR | 2005 |
| H-INDEX | 14 |
Shaping Primate Evolution. Form, Function and Behavior
Allometry and adaptation of body proportions and stature in African pygmies
We have analyzed the growth allometry of external body proportions in Efe pygmies from Zaire and combined these data with values from the literature for comparable dimensions in adult pygmies and nonpygmies. We sequentially tested the hypotheses that adult proportion differences between 1) male vs. female Efe, and 2) pygmies vs. nonpygmies result from ontogenetic scaling, or the differential extension of common patterns of growth allometry. Resul…
Allometry and adaptation of body proportions and stature in African pygmies
Ontogeny of body size variation in African apes
Size variation in African apes (Gorilla gorilla [gorilla], Pan paniscus [pygmy chimpanzee], and Pan troglodytes ["common" chimpanzee]) is substantial, both within and between species. We investigate the possible evolutionary significance of this variation through an analysis of the ontogeny of size variation in this group. In addition, we highlight possible areas of future endocrinological research, and evaluate recently proposed alternative mode…
Ontogeny and the evolution of adult body size dimorphism in apes
This analysis investigates the ontogeny of body size dimorphism in apes. The processes that lead to adult body size dimorphism are illustrated and described. Potential covariation between ontogenetic processes and socioecological variables is evaluated. Mixed‐longitudinal growth data from 395 captive individuals (representing Hylobates lar [gibbon], Hylobates syndactylus [siamang], Pongo pygmaeus [orangutan], Gorilla gorilla [gorilla], Pan panisc…
Pattern in craniofacial biology: Evidence from the old world monkeys (Cercopithecidae)
Developmental perspective on size change and allometry in evolution
The evolution of changes in body size is one of the most important patterns in the history of life. Its importance arises from both the frequency of the pattern and the biological implications of size change itself, which affects myriad aspects of an organism's structure and function through well‐known scaling relationships. Yet relatively little attention has been focused on the underlying genetic and developmental controls of size change or the…
Unfinished business: Mahalanobis and a clockwork orang
Ontogenetic scaling of skeletal proportions in the talapoin monkey
Heterochrony in human evolution: The case for neoteny reconsidered
This paper reviews the evidence for the claim that neoteny, or morphological juvenilization resulting from dissociation and retardation of ancestral rates of shape change, has played a key role in human evolution. Accepted categories and processes of heterochrony are reviewed, and the available data on human growth, variation, and evolution are analyzed in light of expected results. Relatively weak concordance with predictions is found. Mistakes …
Tooth scaling and evolutionary dwarfism: An investigation of allometry in human pygmies
Gould has predicted that in rapidly dwarfed lineages the postcanine teeth exhibit a different scaling pattern than is the normal interspecific trend. His prediction of strong negative allometry has not been frequently tested in quantitative detail. Here we present results of scaling analyses of the molar teeth in African pygmies compared with other Africans of larger size and in Philippine pygmies compared with Filipinos of larger size. We find a…
Biological Anthropology: Comparative Primate Biology, Volume 1: Systematics, Evolution, and Anatomy. Daris R. Swindler and J. Erwin , eds.: Comparative Primate Biology, Volume 2, Part A: Behavior, Con…
Craniometric differentiation and systematics in the genus Pan
Primate Evolution and Human Origins . Russell L. Ciochon and John G. Fleagle
Reproductive strategies, body size, and encephalization in primate evolution
Ontogenetic approaches to sexual dimorphism in anthropoids
Scapula form and locomotion in chimpanzee evolution
A number of primatologists have followed Coolidge (Am. J. Phys. Anthropol. 18: 1–57, 1933) in suggesting that 1) there are significant shape differences in scapula form between pygmy and common chimpanzees, 2) scapulae of P. paniscus resemble those of hylobatids more than do those of P. troglodytes , and 3) therefore pygmy chimpanzees may exhibit a greater component of arm‐swinging and other arboreal behaviors than common chimpanzees. In this pap…
On Skull Form and the Supraorbital Torus in Primates
Ontogenetic Allometry and Scaling: A Discussion Based on the Growth and Form of the Skull in African Apes
The ontogeny of sexual dimorphism in the African apes
The relationship between the growth spurt and the onset of sexual maturity is problematic in nonhuman primates. Growth data on the cranium and postcranium of dentally aged pygmy chimpanzees, common chimpanzees, and gorillas are reported here. In all three species, male means generally exceed female means throughout growth, with the exception that females exhibit a spurt during one dental‐age stage when they become generally larger than the males.…
On aspects of skull form in African apes and orangutans, with implications for hominoid evolution
The study of hominoid phylogeny is currently in a state of controversy and debate due to the discovery of new fossil material and reanalysis of the morphology of extant apes. An important key to the resolution of these debates lies in attaining a fuller understanding of the morphological differences in skull form between the African and Asian great apes. In this paper I have analyzed aspects of facial morphology and internal cranial anatomy in th…
Biological Anthropology: The Form of Man: The Evolutionary Origins of Human Intelligence . Seymour W. Itzkqff
An Allometric Perspective on the Morphological and Evolutionary Relationships between Pygmy (Pan Paniscus) and Common (Pan troglodytes) Chimpanzees
Phyletic size change and brain/body allometry: A consideration based on the African pongids and other primates
Allometry and heterochrony in the African apes
In this work allometry and heterochrony are integrated in an analysis of ontogenic and interspecific morphological patterns in the African apes. The relationship between the interspecific differences in adult morphology and the differences in underlying patterns of growth allometries, body weight growth rates, and developmental chronologies is investigated. Results indicate that rate hypermorphosis, or the extension of ancestral allometries into …
Allometry and heterochrony in the African apes
In this work allometry and heterochrony are integrated in an analysis of ontogenic and interspecific morphological patterns in the African apes. The relationship between the interspecific differences in adult morphology and the differences in underlying patterns of growth allometries, body weight growth rates, and developmental chronologies is investigated. Results indicate that rate hypermorphosis, or the extension of ancestral allometries into …
Relative growth of the limbs and trunk in the African apes
Examination of relative growth and allometry is important for our understanding of the African apes, as they represent a closely related group of species of increasing body size. This study presents a comparison of ontogenetic relative growth patterns of some postcranial dimensions in Pan paniscus, Pantroglodytes , and Gorilla gorilla. Interspecific proportion differences among the three species are also analyzed. It is stressed that reliable ont…
Ontogenetic approaches to sexual dimorphism in anthropoids
Heterochrony in human evolution: The case for neoteny reconsidered
This paper reviews the evidence for the claim that neoteny, or morphological juvenilization resulting from dissociation and retardation of ancestral rates of shape change, has played a key role in human evolution. Accepted categories and processes of heterochrony are reviewed, and the available data on human growth, variation, and evolution are analyzed in light of expected results. Relatively weak concordance with predictions is found. Mistakes …
On aspects of skull form in African apes and orangutans, with implications for hominoid evolution
The study of hominoid phylogeny is currently in a state of controversy and debate due to the discovery of new fossil material and reanalysis of the morphology of extant apes. An important key to the resolution of these debates lies in attaining a fuller understanding of the morphological differences in skull form between the African and Asian great apes. In this paper I have analyzed aspects of facial morphology and internal cranial anatomy in th…
Scapula form and locomotion in chimpanzee evolution
A number of primatologists have followed Coolidge (Am. J. Phys. Anthropol. 18: 1–57, 1933) in suggesting that 1) there are significant shape differences in scapula form between pygmy and common chimpanzees, 2) scapulae of P. paniscus resemble those of hylobatids more than do those of P. troglodytes , and 3) therefore pygmy chimpanzees may exhibit a greater component of arm‐swinging and other arboreal behaviors than common chimpanzees. In this pap…
Eskimo craniofacial morphology, cold stress and the maxillary sinus
A determination of the capacity of the maxillary sinus was made for eight Eskimo populations, one Mongolian population and one American white population. Statistical analyses reveal strong and significant correlations of the mean temperature of the coldest month where these populations live with differences in mean maxillary sinus volume (MSV) values. Results indicate that maxillary sinus volume in Eskimo populations decreases in colder areas. Th…
Unfinished business: Mahalanobis and a clockwork orang
On Skull Form and the Supraorbital Torus in Primates
Phyletic size change and brain/body allometry: A consideration based on the African pongids and other primates
Ontogenetic scaling of skeletal proportions in the talapoin monkey
Tooth scaling and evolutionary dwarfism: An investigation of allometry in human pygmies
Gould has predicted that in rapidly dwarfed lineages the postcanine teeth exhibit a different scaling pattern than is the normal interspecific trend. His prediction of strong negative allometry has not been frequently tested in quantitative detail. Here we present results of scaling analyses of the molar teeth in African pygmies compared with other Africans of larger size and in Philippine pygmies compared with Filipinos of larger size. We find a…
Craniometric differentiation and systematics in the genus Pan
Bonobos: Generalized Hominid Prototypes or Specialized Insular Dwarfs? [and Comments and Replies]
Neontological, biochemical, and paleontological data indicate that the bonobo, Pan paniscus, is a specialized form that possesses relatively small teeth, is quadrupedally adapted, and is only minimally sexually dimorphic. The various specializations of bonobos could be adaptations to ecological restrictions encountered in the terrestrial island of tropical forest that comprises their home range. Bonobos possess specializations quite different fro…
Pattern in craniofacial biology: Evidence from the old world monkeys (Cercopithecidae)
Reproductive strategies, body size, and encephalization in primate evolution
Shaping Primate Evolution. Form, Function and Behavior
Eskimo craniofacial morphology, cold stress and the maxillary sinus
A determination of the capacity of the maxillary sinus was made for eight Eskimo populations, one Mongolian population and one American white population. Statistical analyses reveal strong and significant correlations of the mean temperature of the coldest month where these populations live with differences in mean maxillary sinus volume (MSV) values. Results indicate that maxillary sinus volume in Eskimo populations decreases in colder areas. Th…
Relative growth of the limbs and trunk in the African apes
Examination of relative growth and allometry is important for our understanding of the African apes, as they represent a closely related group of species of increasing body size. This study presents a comparison of ontogenetic relative growth patterns of some postcranial dimensions in Pan paniscus, Pantroglodytes , and Gorilla gorilla. Interspecific proportion differences among the three species are also analyzed. It is stressed that reliable ont…
Bonobos: Generalized Hominid Prototypes or Specialized Insular Dwarfs? [and Comments and Replies]
Neontological, biochemical, and paleontological data indicate that the bonobo, Pan paniscus, is a specialized form that possesses relatively small teeth, is quadrupedally adapted, and is only minimally sexually dimorphic. The various specializations of bonobos could be adaptations to ecological restrictions encountered in the terrestrial island of tropical forest that comprises their home range. Bonobos possess specializations quite different fro…
External body dimensions ofPan paniscus andPan troglodytes chimpanzees
Phyletic size change and brain/body allometry: A consideration based on the African pongids and other primates
Allometry and heterochrony in the African apes
In this work allometry and heterochrony are integrated in an analysis of ontogenic and interspecific morphological patterns in the African apes. The relationship between the interspecific differences in adult morphology and the differences in underlying patterns of growth allometries, body weight growth rates, and developmental chronologies is investigated. Results indicate that rate hypermorphosis, or the extension of ancestral allometries into …
An Allometric Perspective on the Morphological and Evolutionary Relationships between Pygmy (Pan Paniscus) and Common (Pan troglodytes) Chimpanzees
Ontogenetic Allometry and Scaling: A Discussion Based on the Growth and Form of the Skull in African Apes
The ontogeny of sexual dimorphism in the African apes
The relationship between the growth spurt and the onset of sexual maturity is problematic in nonhuman primates. Growth data on the cranium and postcranium of dentally aged pygmy chimpanzees, common chimpanzees, and gorillas are reported here. In all three species, male means generally exceed female means throughout growth, with the exception that females exhibit a spurt during one dental‐age stage when they become generally larger than the males.…
On aspects of skull form in African apes and orangutans, with implications for hominoid evolution
The study of hominoid phylogeny is currently in a state of controversy and debate due to the discovery of new fossil material and reanalysis of the morphology of extant apes. An important key to the resolution of these debates lies in attaining a fuller understanding of the morphological differences in skull form between the African and Asian great apes. In this paper I have analyzed aspects of facial morphology and internal cranial anatomy in th…
Biological Anthropology: The Form of Man: The Evolutionary Origins of Human Intelligence . Seymour W. Itzkqff
Ontogenetic approaches to sexual dimorphism in anthropoids
Scapula form and locomotion in chimpanzee evolution
A number of primatologists have followed Coolidge (Am. J. Phys. Anthropol. 18: 1–57, 1933) in suggesting that 1) there are significant shape differences in scapula form between pygmy and common chimpanzees, 2) scapulae of P. paniscus resemble those of hylobatids more than do those of P. troglodytes , and 3) therefore pygmy chimpanzees may exhibit a greater component of arm‐swinging and other arboreal behaviors than common chimpanzees. In this pap…
On Skull Form and the Supraorbital Torus in Primates
Primate Evolution and Human Origins . Russell L. Ciochon and John G. Fleagle
Reproductive strategies, body size, and encephalization in primate evolution
Tooth scaling and evolutionary dwarfism: An investigation of allometry in human pygmies
Gould has predicted that in rapidly dwarfed lineages the postcanine teeth exhibit a different scaling pattern than is the normal interspecific trend. His prediction of strong negative allometry has not been frequently tested in quantitative detail. Here we present results of scaling analyses of the molar teeth in African pygmies compared with other Africans of larger size and in Philippine pygmies compared with Filipinos of larger size. We find a…
Biological Anthropology: Comparative Primate Biology, Volume 1: Systematics, Evolution, and Anatomy. Daris R. Swindler and J. Erwin , eds.: Comparative Primate Biology, Volume 2, Part A: Behavior, Con…
Craniometric differentiation and systematics in the genus Pan
Heterochrony in human evolution: The case for neoteny reconsidered
This paper reviews the evidence for the claim that neoteny, or morphological juvenilization resulting from dissociation and retardation of ancestral rates of shape change, has played a key role in human evolution. Accepted categories and processes of heterochrony are reviewed, and the available data on human growth, variation, and evolution are analyzed in light of expected results. Relatively weak concordance with predictions is found. Mistakes …
Developmental perspective on size change and allometry in evolution
The evolution of changes in body size is one of the most important patterns in the history of life. Its importance arises from both the frequency of the pattern and the biological implications of size change itself, which affects myriad aspects of an organism's structure and function through well‐known scaling relationships. Yet relatively little attention has been focused on the underlying genetic and developmental controls of size change or the…
Unfinished business: Mahalanobis and a clockwork orang
Ontogenetic scaling of skeletal proportions in the talapoin monkey
Pattern in craniofacial biology: Evidence from the old world monkeys (Cercopithecidae)
Ontogeny and the evolution of adult body size dimorphism in apes
This analysis investigates the ontogeny of body size dimorphism in apes. The processes that lead to adult body size dimorphism are illustrated and described. Potential covariation between ontogenetic processes and socioecological variables is evaluated. Mixed‐longitudinal growth data from 395 captive individuals (representing Hylobates lar [gibbon], Hylobates syndactylus [siamang], Pongo pygmaeus [orangutan], Gorilla gorilla [gorilla], Pan panisc…
Biology (27 works) · Zoology (24 works) · Evolutionary biology (19 works) · Primate Behavior and Ecology (19 works) · Ecology (16 works) · Ecology (15 works) · Allometry (13 works) · Ontogeny (10 works) · Primate (10 works) · Pan paniscus (9 works)