Judith C Masters
Biographic Data
| ID | 118504 |
|---|---|
| NAME | Judith C Masters |
| GIVEN NAMES | Judith C |
| FAMILY NAME | Masters |
| SIGNATURE | MASTERS J C |
| AFFILIATIONS | University of the Witwatersrand |
| ORCID | 0000-0002-2356-5405 |
| VERIFIED | Yes |
| TOTAL WORKS | 21 |
| TOTAL CITATIONS | 94 |
| AUTHOR COUNT | 21 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1988 |
| LATEST PUBLICATION YEAR | 2020 |
| H-INDEX | 6 |
The evolution of palate shape in the Lepilemur ‐Cheirogaleidae clade (Primates: (Strepsirrhini)
OBJECTIVES: Phylogenies consistently group the folivorous Lepilemur species with the small-bodied insectivorous-frugivorous cheirogaleids. Juvenile lepilemurs and adult cheirogaleids share allometries in most aspects of skull morphology, except the palate. We investigated potential influences on palate shape in these taxa and several outgroups using geometric morphometrics. MATERIALS AND METHODS: Our sample included representatives of four extant…
Sharing the burden: A neutral approach to socioecological theory
OBJECTIVE: The socioecological model (SEM) is a popular collection of controversial models purporting to explain mating systems in terms of ecological and social parameters. Despite its guise of objectivity, several of its hypotheses assume Victorian gender stereotypes of active, competing males heedlessly sowing their seeds, and cautious, passive females, imprisoned by greater costs of reproduction and their consequent resourceߚdependence. METHO…
The evolution of the Cercopithecini: A (post)modern synthesis
The Cercopithecini, or African guenon monkeys, are one of the most diverse clades of living primates and comprise the most species‐rich clade of Catarrhini. Species identity is announced by flamboyant coloration of the facial and genital regions and, more cryptically, by vigorous chromosomal rearrangements among taxa. Beneath the skin, however, these animals are skeletally conservative and show low levels of genetic sequence divergence consonant …
A giant among dwarfs: A new species of galago (Primates: Galagidae) from Angola
OBJECTIVES: Based on vocalization recordings of an unknown galago species, our main objectives were to compare morphology and call structure with known closely-related taxa and describe a new species of galago. MATERIALS AND METHODS: We conducted field surveys in three forest habitats along the escarpment region in western Angola (Kumbira Forest, Bimbe Area, and Northern Scarp Forest), and examined galago specimens from museums worldwide. We digi…
Characterizing cryptic species: A morphometric analysis of craniodental characters in the dwarf galago genus Galagoides
OBJECTIVES: The true dwarf galagos of the genus Galagoides, G. demidoff and G. thomasi, are difficult to distinguish morphologically at a specific or subspecific level, and most taxonomic designations are based primarily on geographic localities. We used morphometrics to investigate the morphological diversity of the genus. MATERIALS AND METHODS: We conducted statistical analyses of 12 linear measurements on 290 Galagoides skulls housed in museum…
Life history traits, maternal behavior and infant development of blue‐eyed black lemurs ( Eulemur flavifrons )
An understanding of recruitment is important for estimating population growth and viability, and their implications for conservation. We present the first results regarding the life history, maternal behavior and infant development of the critically endangered blue‐eyed black lemur ( Eulemur flavifrons ) of Madagascar. The species breeds seasonally, with births occurring at the end of the dry season, between late August and October. Over two succ…
Phylogenetic relationships among the Lorisoidea as indicated by craniodental morphology and mitochondrial sequence data
The phylogeny of the Afro‐Asian Lorisoidea is controversial. While postcranial data attest strongly to the monophyly of the Lorisidae, most molecular analyses portray them as paraphyletic and group the Galagidae alternately with the Asian or African lorisids. One of the problems that has bedevilled phylogenetic analysis of the group in the past is the limited number of taxa sampled for both ingroup families. We present the results of a series of …
Reconstructing the evolutionary history of the Lorisidae using morphological, molecular, and geological data
Major aspects of lorisid phylogeny and systematics remain unresolved, despite several studies (involving morphology, histology, karyology, immunology, and DNA sequencing) aimed at elucidating them. Our study is the first to investigate the evolution of this enigmatic group using molecular and morphological data for all four well-established genera: Arctocebus, Loris, Nycticebus, and Perodicticus. Data sets consisting of 386 bp of 12S rRNA, 535 bp…
Jon Marks
Lack of congruence between morphological and molecular data in reconstructing the phylogeny of the galagonidae
Published cladistic reconstructions of galagonid phylogeny based on morphological, behavioral, and genetic data have had few elements in common. A recent molecular study indicated that 2 of the 3 generic groupings derived from morphological data were not consistent with tree topologies constructed from the analysis of mitochondrial DNA sequences. In this study, we compiled and analyzed a data set based on craniodental morphology in 13 galagonid a…
Mitochondrial Sequences as Indicators of Genetic Classification in Bush Babies
Introduction to Diversity and Speciation in the Prosimii
Morphological Correlates of Speciation in Bush Babies
Phylogenetic relationships among the galaginae as indicated by erythrocytic allozymes
Highly repeated DNA sequences as phylogenetic markers among the galaginae
Highly repeated DNA sequences were investigated as potential phylogenetic indicators among five species of galagines. One lorisine, one cheirogaleid, and two lemurid species were also investigated as progressively more distant outgroups. The lorisids displayed strong conservatism with regard to these sequences, to the point where the galegine species proved difficult to differentiate. When restriction fragment differences were observed, the galag…
The Makapansgat australopithecine environment
Loud calls ofGalago crassicaudatus andG. garnettii and their relation to habitat structure
Distribution of erythrocytic allozymes in two sibling species of greater galago [ Galago crassicaudatus E. Geoffroy 1812 and G. garnettii (Ogilby 1838)]
This study investigated the use of erythrocyte enzymes as indicators of the presence or absence of gene flow between the sibling species G. crassicaudatus and G. garnettii . Fifty‐five animals deriving from 14 different source populations were included in the analyses. In addition to hemoglobin, eight enzyme systems were examined: acid phosphatase, adenylate kinase, carbonic anhydrase II, esterase D, glucose‐6‐phosphate dehydrogenase, 6‐phosphogl…
Forthcoming article
Reproductive and dietary parameters in wild greater galago populations
Morphological clues to genetic species: Multivariate analysis of greater Galago sibling species
Several studies conducted in diverse fields indicate the presence of a genetic discontinuity within the taxon Galago crassicaudatus E. Geoffroy—the thick‐tailed bushbaby. One of these areas is morphology. This contribution details a statistical analysis of skull material classified under this taxon in order 1) to confirm the objective existence of two morphotypes, and 2) to investigate the characters that allow the skull types to be distinguished…
The Makapansgat australopithecine environment
Mitochondrial Sequences as Indicators of Genetic Classification in Bush Babies
Characterizing cryptic species: A morphometric analysis of craniodental characters in the dwarf galago genus Galagoides
OBJECTIVES: The true dwarf galagos of the genus Galagoides, G. demidoff and G. thomasi, are difficult to distinguish morphologically at a specific or subspecific level, and most taxonomic designations are based primarily on geographic localities. We used morphometrics to investigate the morphological diversity of the genus. MATERIALS AND METHODS: We conducted statistical analyses of 12 linear measurements on 290 Galagoides skulls housed in museum…
Morphological clues to genetic species: Multivariate analysis of greater Galago sibling species
Several studies conducted in diverse fields indicate the presence of a genetic discontinuity within the taxon Galago crassicaudatus E. Geoffroy—the thick‐tailed bushbaby. One of these areas is morphology. This contribution details a statistical analysis of skull material classified under this taxon in order 1) to confirm the objective existence of two morphotypes, and 2) to investigate the characters that allow the skull types to be distinguished…
Lack of congruence between morphological and molecular data in reconstructing the phylogeny of the galagonidae
Published cladistic reconstructions of galagonid phylogeny based on morphological, behavioral, and genetic data have had few elements in common. A recent molecular study indicated that 2 of the 3 generic groupings derived from morphological data were not consistent with tree topologies constructed from the analysis of mitochondrial DNA sequences. In this study, we compiled and analyzed a data set based on craniodental morphology in 13 galagonid a…
Morphological Correlates of Speciation in Bush Babies
Reconstructing the evolutionary history of the Lorisidae using morphological, molecular, and geological data
Major aspects of lorisid phylogeny and systematics remain unresolved, despite several studies (involving morphology, histology, karyology, immunology, and DNA sequencing) aimed at elucidating them. Our study is the first to investigate the evolution of this enigmatic group using molecular and morphological data for all four well-established genera: Arctocebus, Loris, Nycticebus, and Perodicticus. Data sets consisting of 386 bp of 12S rRNA, 535 bp…
Reproductive and dietary parameters in wild greater galago populations
A giant among dwarfs: A new species of galago (Primates: Galagidae) from Angola
OBJECTIVES: Based on vocalization recordings of an unknown galago species, our main objectives were to compare morphology and call structure with known closely-related taxa and describe a new species of galago. MATERIALS AND METHODS: We conducted field surveys in three forest habitats along the escarpment region in western Angola (Kumbira Forest, Bimbe Area, and Northern Scarp Forest), and examined galago specimens from museums worldwide. We digi…
Introduction to Diversity and Speciation in the Prosimii
Distribution of erythrocytic allozymes in two sibling species of greater galago [ Galago crassicaudatus E. Geoffroy 1812 and G. garnettii (Ogilby 1838)]
This study investigated the use of erythrocyte enzymes as indicators of the presence or absence of gene flow between the sibling species G. crassicaudatus and G. garnettii . Fifty‐five animals deriving from 14 different source populations were included in the analyses. In addition to hemoglobin, eight enzyme systems were examined: acid phosphatase, adenylate kinase, carbonic anhydrase II, esterase D, glucose‐6‐phosphate dehydrogenase, 6‐phosphogl…
Forthcoming article
Reproductive and dietary parameters in wild greater galago populations
Morphological clues to genetic species: Multivariate analysis of greater Galago sibling species
Several studies conducted in diverse fields indicate the presence of a genetic discontinuity within the taxon Galago crassicaudatus E. Geoffroy—the thick‐tailed bushbaby. One of these areas is morphology. This contribution details a statistical analysis of skull material classified under this taxon in order 1) to confirm the objective existence of two morphotypes, and 2) to investigate the characters that allow the skull types to be distinguished…
Loud calls ofGalago crassicaudatus andG. garnettii and their relation to habitat structure
The Makapansgat australopithecine environment
Phylogenetic relationships among the galaginae as indicated by erythrocytic allozymes
Highly repeated DNA sequences as phylogenetic markers among the galaginae
Highly repeated DNA sequences were investigated as potential phylogenetic indicators among five species of galagines. One lorisine, one cheirogaleid, and two lemurid species were also investigated as progressively more distant outgroups. The lorisids displayed strong conservatism with regard to these sequences, to the point where the galegine species proved difficult to differentiate. When restriction fragment differences were observed, the galag…
Mitochondrial Sequences as Indicators of Genetic Classification in Bush Babies
Introduction to Diversity and Speciation in the Prosimii
Morphological Correlates of Speciation in Bush Babies
Lack of congruence between morphological and molecular data in reconstructing the phylogeny of the galagonidae
Published cladistic reconstructions of galagonid phylogeny based on morphological, behavioral, and genetic data have had few elements in common. A recent molecular study indicated that 2 of the 3 generic groupings derived from morphological data were not consistent with tree topologies constructed from the analysis of mitochondrial DNA sequences. In this study, we compiled and analyzed a data set based on craniodental morphology in 13 galagonid a…
Jon Marks
Reconstructing the evolutionary history of the Lorisidae using morphological, molecular, and geological data
Major aspects of lorisid phylogeny and systematics remain unresolved, despite several studies (involving morphology, histology, karyology, immunology, and DNA sequencing) aimed at elucidating them. Our study is the first to investigate the evolution of this enigmatic group using molecular and morphological data for all four well-established genera: Arctocebus, Loris, Nycticebus, and Perodicticus. Data sets consisting of 386 bp of 12S rRNA, 535 bp…
Phylogenetic relationships among the Lorisoidea as indicated by craniodental morphology and mitochondrial sequence data
The phylogeny of the Afro‐Asian Lorisoidea is controversial. While postcranial data attest strongly to the monophyly of the Lorisidae, most molecular analyses portray them as paraphyletic and group the Galagidae alternately with the Asian or African lorisids. One of the problems that has bedevilled phylogenetic analysis of the group in the past is the limited number of taxa sampled for both ingroup families. We present the results of a series of …
Life history traits, maternal behavior and infant development of blue‐eyed black lemurs ( Eulemur flavifrons )
An understanding of recruitment is important for estimating population growth and viability, and their implications for conservation. We present the first results regarding the life history, maternal behavior and infant development of the critically endangered blue‐eyed black lemur ( Eulemur flavifrons ) of Madagascar. The species breeds seasonally, with births occurring at the end of the dry season, between late August and October. Over two succ…
Characterizing cryptic species: A morphometric analysis of craniodental characters in the dwarf galago genus Galagoides
OBJECTIVES: The true dwarf galagos of the genus Galagoides, G. demidoff and G. thomasi, are difficult to distinguish morphologically at a specific or subspecific level, and most taxonomic designations are based primarily on geographic localities. We used morphometrics to investigate the morphological diversity of the genus. MATERIALS AND METHODS: We conducted statistical analyses of 12 linear measurements on 290 Galagoides skulls housed in museum…
The evolution of the Cercopithecini: A (post)modern synthesis
The Cercopithecini, or African guenon monkeys, are one of the most diverse clades of living primates and comprise the most species‐rich clade of Catarrhini. Species identity is announced by flamboyant coloration of the facial and genital regions and, more cryptically, by vigorous chromosomal rearrangements among taxa. Beneath the skin, however, these animals are skeletally conservative and show low levels of genetic sequence divergence consonant …
A giant among dwarfs: A new species of galago (Primates: Galagidae) from Angola
OBJECTIVES: Based on vocalization recordings of an unknown galago species, our main objectives were to compare morphology and call structure with known closely-related taxa and describe a new species of galago. MATERIALS AND METHODS: We conducted field surveys in three forest habitats along the escarpment region in western Angola (Kumbira Forest, Bimbe Area, and Northern Scarp Forest), and examined galago specimens from museums worldwide. We digi…
Sharing the burden: A neutral approach to socioecological theory
OBJECTIVE: The socioecological model (SEM) is a popular collection of controversial models purporting to explain mating systems in terms of ecological and social parameters. Despite its guise of objectivity, several of its hypotheses assume Victorian gender stereotypes of active, competing males heedlessly sowing their seeds, and cautious, passive females, imprisoned by greater costs of reproduction and their consequent resourceߚdependence. METHO…
The evolution of palate shape in the Lepilemur ‐Cheirogaleidae clade (Primates: (Strepsirrhini)
OBJECTIVES: Phylogenies consistently group the folivorous Lepilemur species with the small-bodied insectivorous-frugivorous cheirogaleids. Juvenile lepilemurs and adult cheirogaleids share allometries in most aspects of skull morphology, except the palate. We investigated potential influences on palate shape in these taxa and several outgroups using geometric morphometrics. MATERIALS AND METHODS: Our sample included representatives of four extant…
Biology (18 works) · Zoology (15 works) · Ecology (11 works) · Ecology (10 works) · Evolutionary biology (9 works) · Primate Behavior and Ecology (9 works) · Gene (7 works) · Amphibian and Reptile Biology (6 works) · Animal ecology (6 works) · Clade (6 works)