The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
Myron Shekelle - One of the best experts on this subject based on the ideXlab platform.
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The Genera and Species of Tarsiidae
International Journal of Primatology, 2010Co-Authors: Colin Groves, Myron ShekelleAbstract:We revise the taxonomy of the primate family Tarsiidae. We classify extant tarsiers in 3 genera— Tarsius , Cephalopachus , and Carlito —each of which originated in the Miocene, or earlier, and each of which is allopatrically distributed within a distinct biogeographic region: Sulawesi, Sundaland, and Greater Mindanao, respectively. Within the genus Tarsius , formerly regarded as a single species, Tarsius spectrum , we recognize 8 allopatric and parapatric species, 9 if the inclusion of pumilus is warranted, and note that more are likely to be described in the near future. We restrict Tarsius tarsier , the senior taxon of the genus, to the island of Selayar, off the tip of the southwestern peninsula of Sulawesi. In doing so, it is required that we resurrect Tarsius fuscus Fischer 1804, for the population of tarsiers from the southwestern peninsula near the city of Makassar. We note that neither Cephalopachus nor Carlito has been the subject of anywhere near as much field research as has Tarsius ; thus we question if the currently accepted α taxonomy for these genera is based on knowledge or ignorance.
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Molecular Phylogenetics and Chronometrics of Tarsiidae Based on 12S mtDNA Haplotypes: Evidence for Miocene Origins of Crown Tarsiers and Numerous Species within the Sulawesian Clade
International Journal of Primatology, 2010Co-Authors: Myron Shekelle, Rudolf Meier, Ian Wahyu, Nelson TingAbstract:We report new mitochondrial DNA sequence data from tarsiers sampled from several populations, including the extreme northeast and southwest of the range of the Tarsius tarsier species complex, the most extensive sampling ever reported for this taxon. Our results provide the opportunity to produce the first ever molecular chronometric analysis of Tarsiidae. These results date the age of crown tarsiers, minimally, to the middle Miocene, and each of the 3 tarsier species groups, Tarsius bancanus , T. syrichta , and the T. tarsier complex, to the early or middle Miocene. Thus, each of these 3 species has evolved in isolation for a period of time that is consistent with that which would be expected for multiple speciation events. Our analysis of the Tarsius tarsier complex reveals 5 subclades, each of which is interpreted to represent a haplogroup at, or above, the species level, a result that is consistent with current hypotheses about numerous cryptic species within this species complex. The implications for conservation within the Sulawesi biogeographic region are that Sulawesi is subdivided into numerous subregions of endemism and that, by extrapolating the example of cryptic tarsier species to other taxa, biodiversity may be underestimated by an order of magnitude. The practical realties of conservation in Sulawesi are such that it is most reasonable to assume that anthropogenic extinctions are occurring, and that some species will go extinct before they have even been identified.
Colin Groves - One of the best experts on this subject based on the ideXlab platform.
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The Genera and Species of Tarsiidae
International Journal of Primatology, 2010Co-Authors: Colin Groves, Myron ShekelleAbstract:We revise the taxonomy of the primate family Tarsiidae. We classify extant tarsiers in 3 genera— Tarsius , Cephalopachus , and Carlito —each of which originated in the Miocene, or earlier, and each of which is allopatrically distributed within a distinct biogeographic region: Sulawesi, Sundaland, and Greater Mindanao, respectively. Within the genus Tarsius , formerly regarded as a single species, Tarsius spectrum , we recognize 8 allopatric and parapatric species, 9 if the inclusion of pumilus is warranted, and note that more are likely to be described in the near future. We restrict Tarsius tarsier , the senior taxon of the genus, to the island of Selayar, off the tip of the southwestern peninsula of Sulawesi. In doing so, it is required that we resurrect Tarsius fuscus Fischer 1804, for the population of tarsiers from the southwestern peninsula near the city of Makassar. We note that neither Cephalopachus nor Carlito has been the subject of anywhere near as much field research as has Tarsius ; thus we question if the currently accepted α taxonomy for these genera is based on knowledge or ignorance.
Nelson Ting - One of the best experts on this subject based on the ideXlab platform.
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Molecular Phylogenetics and Chronometrics of Tarsiidae Based on 12S mtDNA Haplotypes: Evidence for Miocene Origins of Crown Tarsiers and Numerous Species within the Sulawesian Clade
International Journal of Primatology, 2010Co-Authors: Myron Shekelle, Rudolf Meier, Ian Wahyu, Nelson TingAbstract:We report new mitochondrial DNA sequence data from tarsiers sampled from several populations, including the extreme northeast and southwest of the range of the Tarsius tarsier species complex, the most extensive sampling ever reported for this taxon. Our results provide the opportunity to produce the first ever molecular chronometric analysis of Tarsiidae. These results date the age of crown tarsiers, minimally, to the middle Miocene, and each of the 3 tarsier species groups, Tarsius bancanus , T. syrichta , and the T. tarsier complex, to the early or middle Miocene. Thus, each of these 3 species has evolved in isolation for a period of time that is consistent with that which would be expected for multiple speciation events. Our analysis of the Tarsius tarsier complex reveals 5 subclades, each of which is interpreted to represent a haplogroup at, or above, the species level, a result that is consistent with current hypotheses about numerous cryptic species within this species complex. The implications for conservation within the Sulawesi biogeographic region are that Sulawesi is subdivided into numerous subregions of endemism and that, by extrapolating the example of cryptic tarsier species to other taxa, biodiversity may be underestimated by an order of magnitude. The practical realties of conservation in Sulawesi are such that it is most reasonable to assume that anthropogenic extinctions are occurring, and that some species will go extinct before they have even been identified.
Jezie A Acorda - One of the best experts on this subject based on the ideXlab platform.
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ultrasound features and echo mean values of the heart liver and stomach in the philippine tarsier carlito syrichta linnaeus 1758 shekelle and groves 2010 mammalia primates Tarsiidae
The Philippine Journal of Veterinary Medicine, 2014Co-Authors: April May L Arcamogentica, Jezie A AcordaAbstract:The ultrasound features and echo mean values of the heart, liver and stomach of apparently healthy Philippine tarsiers (Carlito syrichta) were determined according to sex (4 males and 4 females), age (4 adults and 4 juveniles) and source (5 captive-bred and 3 wild) using an ultrasound machine equipped with a 7.5 MHz linear-array scanner. The heart appeared as an anechoic, rapidly contracting ovoid structure. Adults had significantly higher mean cardiac dimensions than juvenile tarsiers. Wild tarsiers had significantly higher echo mean values of the heart chamber than captive-bred animals. The liver appeared homogenously hypoechoic with some anechoic areas. The stomach had anechoic lumen with hyperechoic wall. Adults had significantly higher stomach mean length than juveniles but no significant differences in the echogenicity of the stomach lumen according to age, sex and source of tarsiers were observed. Results of the study could be used as baseline data for the ultrasound features of heart, liver, Philipp. Key words: digital analysis, heart, liver, Philippine tarsier, stomach, ultrasound
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ultrasonic imaging and sonographic digital analysis of the kidneys and urinary bladder in the philippine tarsier carlito syrichta linnaeus 1758 shekelle and groves 2010 mammalia primates Tarsiidae
The Philippine Journal of Veterinary Medicine, 2013Co-Authors: April May L Arcamogentica, Jezie A AcordaAbstract:The purpose of this study was to describe the ultrasonographic features and determine the echogenicity of kidneys and urinary bladder according to sex, age and source of Philippine tarsiers (Carlito syrichta). The examination was done using a veterinary ultrasound machine equipped with a 7.5 MHz linear-array scanner. Eight apparently healthy Philippine tarsiers (three caught from the wild and five captive-bred) were examined. The kidneys appeared as bean-shaped with anechoic renal medulla, hypoechoic renal cortex, hyperechoic renal pelvis and a thin hyperechoic renal capsule. The dimensions of the kidneys showed larger size in adults, females and wild tarsiers. The echogenicity of the kidney showed that the renal pelvis had the highest echo mean values, followed by the renal cortex and renal medulla. The urinary bladder had anechoic lumen with defined hypoechoic walls. The dimensions of the urinary bladder showed a larger size among adults, females and wild tarsiers. Echo mean values showed that the urinary bladder lumen of juveniles, females and wild tarsiers were more echogenic. Results of the study could be used as baseline data for the ultrasound features of kidneys and urinary bladder for diagnosis of diseases and disorders of these organs in Philippine tarsiers. Key words: echo histogram, kidneys, Philippine tarsier, ultrasound, urinary bladder
April May L Arcamogentica - One of the best experts on this subject based on the ideXlab platform.
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ultrasound features and echo mean values of the heart liver and stomach in the philippine tarsier carlito syrichta linnaeus 1758 shekelle and groves 2010 mammalia primates Tarsiidae
The Philippine Journal of Veterinary Medicine, 2014Co-Authors: April May L Arcamogentica, Jezie A AcordaAbstract:The ultrasound features and echo mean values of the heart, liver and stomach of apparently healthy Philippine tarsiers (Carlito syrichta) were determined according to sex (4 males and 4 females), age (4 adults and 4 juveniles) and source (5 captive-bred and 3 wild) using an ultrasound machine equipped with a 7.5 MHz linear-array scanner. The heart appeared as an anechoic, rapidly contracting ovoid structure. Adults had significantly higher mean cardiac dimensions than juvenile tarsiers. Wild tarsiers had significantly higher echo mean values of the heart chamber than captive-bred animals. The liver appeared homogenously hypoechoic with some anechoic areas. The stomach had anechoic lumen with hyperechoic wall. Adults had significantly higher stomach mean length than juveniles but no significant differences in the echogenicity of the stomach lumen according to age, sex and source of tarsiers were observed. Results of the study could be used as baseline data for the ultrasound features of heart, liver, Philipp. Key words: digital analysis, heart, liver, Philippine tarsier, stomach, ultrasound
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ultrasonic imaging and sonographic digital analysis of the kidneys and urinary bladder in the philippine tarsier carlito syrichta linnaeus 1758 shekelle and groves 2010 mammalia primates Tarsiidae
The Philippine Journal of Veterinary Medicine, 2013Co-Authors: April May L Arcamogentica, Jezie A AcordaAbstract:The purpose of this study was to describe the ultrasonographic features and determine the echogenicity of kidneys and urinary bladder according to sex, age and source of Philippine tarsiers (Carlito syrichta). The examination was done using a veterinary ultrasound machine equipped with a 7.5 MHz linear-array scanner. Eight apparently healthy Philippine tarsiers (three caught from the wild and five captive-bred) were examined. The kidneys appeared as bean-shaped with anechoic renal medulla, hypoechoic renal cortex, hyperechoic renal pelvis and a thin hyperechoic renal capsule. The dimensions of the kidneys showed larger size in adults, females and wild tarsiers. The echogenicity of the kidney showed that the renal pelvis had the highest echo mean values, followed by the renal cortex and renal medulla. The urinary bladder had anechoic lumen with defined hypoechoic walls. The dimensions of the urinary bladder showed a larger size among adults, females and wild tarsiers. Echo mean values showed that the urinary bladder lumen of juveniles, females and wild tarsiers were more echogenic. Results of the study could be used as baseline data for the ultrasound features of kidneys and urinary bladder for diagnosis of diseases and disorders of these organs in Philippine tarsiers. Key words: echo histogram, kidneys, Philippine tarsier, ultrasound, urinary bladder
