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Eric J. Sargis - One of the best experts on this subject based on the ideXlab platform.
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coming of age morphometric variation in the hand skeletons of juvenile and adult lesser treeshrews scandentia Tupaiidae tupaia minor gunther 1876
Journal of Mammalogy, 2020Co-Authors: Eric J. Sargis, Link E. Olson, Neal Woodman, Ananth MillermurthyAbstract:Morphometric analyses of the manus skeleton have proven useful in understanding species limits and morphological divergence among tupaiid treeshrews (Scandentia: Tupaiidae). Specimens in these studies are typically limited to mature individuals with fully erupted permanent dentition, which eliminates potentially confounding variation attributable to age, but also can exclude rare taxa and small island populations that are poorly represented in systematic collections. To determine the real limits associated with including immature animals in such studies, we used multivariate analyses to study sexual and age variation of the manus skeleton in two allopatric populations of the Lesser Treeshrew (Tupaia minorGunther, 1876) from the Malay Peninsula and from Borneo that we treated as separate samples. Individuals were aged using dental eruption of the permanent dentition. We also recorded the degree of epiphyseal fusion of the bones of the manus based on x-rays of study skins. We then tested our ability to distinguish the two populations using a series of discriminant function analyses of hand measurements from samples that included varying proportions of immature individuals and adults. We found no evidence of sexual dimorphism in hand proportions, permitting us to combine females and males in our samples. Epiphyseal fusion of the metacarpals and phalanges typically occurs by the time the third molars have completely erupted, and fusion of the distal epiphyses of the radius and ulna typically occurs by the time the permanent fourth premolars are in place. There is occasional asynchrony between dental age and epiphyseal fusion. In both populations, the hands of most infants and subadults provide morphometric values within the range of variation of adults, although they are typically distributed in the lower part of the adult range and have the potential to bias the sample toward lower mean size. The inclusion of infants and subadults when attempting to discriminate between two taxa generally results in lower rates of correct classifications, although the rates increase as the sample of immature individuals is limited to older subadults. As a general rule, we recommend that specimens of infants and subadults continue to be excluded from analyses when exploring taxonomic boundaries among treeshrews. In cases of extremely small sample sizes of adults, however, older subadults—in which the permanent third premolars are erupting or in place—can be used with appropriate caution.
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Three-Dimensional Geometric Morphometric Analysis of Treeshrew (Scandentia) Lower Molars: Insight into Dental Variation and Systematics.
Anatomical Record-advances in Integrative Anatomy and Evolutionary Biology, 2019Co-Authors: Keegan R Selig, Eric J. Sargis, Mary T SilcoxAbstract:: Scandentia (treeshrews) is an order of small-bodied Indomalayan mammals generally agreed to be a member of Euarchonta with Primates and Dermoptera (colugos). However, intraordinal relationships among treeshrews are less well understood. Although recent studies have begun to clarify treeshrew taxonomy using morphological and molecular datasets, previous analysis of treeshrew dentition has yielded little clarity in terms of species-level relationships within the order. However, these studies made use of character-based methods, scoring traits across the dental arcade, which depend on there being clear differences among taxa that can be encapsulated in coding schemes. Geometric morphometrics has the potential to capture subtler shape variation, so it may be better for examining similarities among closely related taxa whose teeth have a similar bauplan. We used three-dimensional geometric morphometrics on a sample of treeshrew lower second molars and compared the patterns of variation to the results of previous studies. We captured 19 landmarks on a sample of 43 specimens representing 15 species. Using specimen-based principal components analysis and between-group principal component analysis, the two treeshrew families (Tupaiidae and Ptilocercidae) were well separated in morphospace. Moreover, several treeshrew species plot in morphospace according to the clades established in previous molecular work, with closely related species plotting closer to one another than to more distantly related species, suggesting that dental morphology can be useful when studying relationships among treeshrews. As most extinct treeshrews are known only from teeth, understanding morphological patterns in treeshrew molars is important for future work on the evolutionary history of Scandentia. Anat Rec, 302:1154-1168, 2019. © 2019 Wiley Periodicals, Inc.
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Taxonomic Boundaries and Craniometric Variation in the Treeshrews (Scandentia, Tupaiidae) from the Palawan Faunal Region
Journal of Mammalian Evolution, 2014Co-Authors: Eric J. Sargis, Kyle K Campbell, Link E. OlsonAbstract:The taxonomy of treeshrews (Order Scandentia) has long been complicated by ambiguous morphological species boundaries, and the treeshrews of the Palawan faunal region of the Philippines are no exception. Four named forms in the genus Tupaia Raffles, 1821, have been described from four island groups based on subtle qualitative morphological characters, and as many as three distinct species have been recognized. A recent molecular phylogenetic study of relationships among Tupaia species suggests that the two currently-recognized treeshrew species from the Palawan faunal region diverged very recently relative to other sister-species divergences within the genus and may not represent species-level taxonomic entities. Here we review the taxonomic and biogeographic histories of the Tupaia taxa from this region. We also collected craniodental data from 133 skulls of all four named forms, representing five island populations, and conducted univariate and multivariate analyses on these data. Our morphometric results are consistent with molecular results, further suggesting that there is insufficient evidence to recognize T . moellendorffi Matschie, 1898, as a separate species from T . palawanensis Thomas, 1894. Our analyses also revealed a craniodentally divergent population from the island of Balabac, which has never been considered a distinct subspecies (or species) from the population on Palawan. These results have conservation implications for the island populations in our analyses, but additional surveys and molecular evidence will be required to fully assess conservation priorities for the treeshrews of the Palawan faunal region.
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island history affects faunal composition the treeshrews mammalia scandentia Tupaiidae from the mentawai and batu islands indonesia
Biological Journal of The Linnean Society, 2014Co-Authors: Eric J. Sargis, Neal Woodman, Natalie C Morningstar, Aspen T Reese, Link E. OlsonAbstract:The Mentawai and Batu Island groups off the west coast of Sumatra have a complicated geological and biogeographical history. The Batu Islands have shared a connection with the Sumatran ‘mainland’ during periods of lowered sea level, whereas the Mentawai Islands, despite being a similar distance from Sumatra, have remained isolated from Sumatra, and probably from the Batu Islands as well. These contrasting historical relationships to Sumatra have influenced the compositions of the respective mammalian faunas of these island groups. Treeshrews (Scandentia, Tupaiidae) from these islands have, at various times in their history, been recognized as geographically circumscribed populations of a broadly distributed Tupaia glis, subspecies, or distinct species. We used multivariate analyses of measurements from the skull and hands to compare the island populations from Siberut (Mentawai Islands) and Tanahbala (Batu Islands) with the geographically adjacent species from the southern Mentawai Islands (T. chrysogaster) and Sumatra (T. ferruginea). Results from both the skull and manus of the Siberut population show that it is most similar to T. chrysogaster, whereas the Tanahbala population is more similar to T. ferruginea, confirming predictions based on island history. These results are further corroborated by mammae counts. Based on these lines of evidence, we include the Siberut population in T. chrysogaster and the Tanahbala population in T. ferruginea. Our conclusions expand the known distributions of both the Mentawai and Sumatran species. The larger geographical range of the endangered T. chrysogaster has conservation implications for this Mentawai endemic, so populations and habitat should be re-evaluated on each of the islands it inhabits. However, until such a re-evaluation is conducted, we recommend that the IUCN Red List status of this species be changed from ‘Endangered’ to ‘Data Deficient’. Published 2013. This article is a U.S. Government work and is in the public domain in the USA, Biological Journal of the Linnean Society, 2014, 111, 290–304.
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taxonomic boundaries and craniometric variation in the treeshrews scandentia Tupaiidae from the palawan
2014Co-Authors: Eric J. Sargis, Kyle K Campbell, Link E. OlsonAbstract:Abstract The taxonomy of treeshrews (Order Scandentia)has long been complicated by ambiguous morphologicalspecies boundaries, and the treeshrews of the Palawan fau-nal region of the Philippines are no exception. Four namedforms in the genus Tupaia Raffles, 1821, have been de-scribed from four island groups based on subtle qualitativemorphological characters, and as many as three distinctspecies have been recognized. A recent molecular phyloge-netic study of relationships among Tupaia species suggeststhat the two currently-recognized treeshrew species from thePalawan faunal region diverged very recently relative toother sister-species divergences within the genus and maynot represent species-level taxonomic entities. Here we re-view the taxonomic and biogeographic histories of theTupaia taxa from this region. We also collected craniodentaldata from 133 skulls of all four named forms, representingfive island populations, and conducted univariate and mul-tivariate analyses on these data. Our morphometric resultsare consistent with molecular results, further suggesting thatthere is insufficient evidence to recognize T. moellendorffiMatschie, 1898, as a separate species from T. palawanensisThomas, 1894. Our analyses also revealed a craniodentallydivergent population from the island of Balabac, which hasnever been considered a distinct subspecies (or species)from the population on Palawan. These results have conser-vation implications for the island populations in our analy-ses, but additional surveys and molecular evidence will berequired to fully assess conservation priorities for thetreeshrews of the Palawan faunal region.Keywords Cranium .Morphology .Philippines .Skull .Taxonomy .TupaiaIntroductionBackgroundTreeshrews (Scandentia) are an ordinal clade of Indomalayansmall mammals whose interordinal relationships have beenwell studied and debated (reviewed by Sargis 2004, 2007;Sargisetal.2013).Despitethis,thespecies-leveltaxonomyoftreeshrews has not been comprehensively reviewed since thefirst and only monographic account was published a centuryago(Lyon1913).Boutsofsplittingandlumpingasrecentlyasthe 1990s have served to further obscure the taxonomicboundaries and evolutionary history of treeshrews (e.g.,Corbet and Hill 1992; Olson et al. 2005; Sargis et al. 2013).One group in particular, the species complex of TupaiapalawanensisThomas,1894(Sanborn1952),hasexperienceda dynamic taxonomic history of recurrent species elevationsand synonymizations.The T. palawanensis species complex is endemic to thePalawan faunal region of the Philippines (Fig. 1). As cur-rently recognized (Helgen 2005), the monotypic Palawantreeshrew, T. palawanensis, is distributed throughout theisland of Palawan and its associated minor islands (e.g.,Balabac), while the Calamian treeshrew, T. moellendorffiMatschie, 1898, is represented by three subspecies on the
Link E. Olson - One of the best experts on this subject based on the ideXlab platform.
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coming of age morphometric variation in the hand skeletons of juvenile and adult lesser treeshrews scandentia Tupaiidae tupaia minor gunther 1876
Journal of Mammalogy, 2020Co-Authors: Eric J. Sargis, Link E. Olson, Neal Woodman, Ananth MillermurthyAbstract:Morphometric analyses of the manus skeleton have proven useful in understanding species limits and morphological divergence among tupaiid treeshrews (Scandentia: Tupaiidae). Specimens in these studies are typically limited to mature individuals with fully erupted permanent dentition, which eliminates potentially confounding variation attributable to age, but also can exclude rare taxa and small island populations that are poorly represented in systematic collections. To determine the real limits associated with including immature animals in such studies, we used multivariate analyses to study sexual and age variation of the manus skeleton in two allopatric populations of the Lesser Treeshrew (Tupaia minorGunther, 1876) from the Malay Peninsula and from Borneo that we treated as separate samples. Individuals were aged using dental eruption of the permanent dentition. We also recorded the degree of epiphyseal fusion of the bones of the manus based on x-rays of study skins. We then tested our ability to distinguish the two populations using a series of discriminant function analyses of hand measurements from samples that included varying proportions of immature individuals and adults. We found no evidence of sexual dimorphism in hand proportions, permitting us to combine females and males in our samples. Epiphyseal fusion of the metacarpals and phalanges typically occurs by the time the third molars have completely erupted, and fusion of the distal epiphyses of the radius and ulna typically occurs by the time the permanent fourth premolars are in place. There is occasional asynchrony between dental age and epiphyseal fusion. In both populations, the hands of most infants and subadults provide morphometric values within the range of variation of adults, although they are typically distributed in the lower part of the adult range and have the potential to bias the sample toward lower mean size. The inclusion of infants and subadults when attempting to discriminate between two taxa generally results in lower rates of correct classifications, although the rates increase as the sample of immature individuals is limited to older subadults. As a general rule, we recommend that specimens of infants and subadults continue to be excluded from analyses when exploring taxonomic boundaries among treeshrews. In cases of extremely small sample sizes of adults, however, older subadults—in which the permanent third premolars are erupting or in place—can be used with appropriate caution.
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Taxonomic Boundaries and Craniometric Variation in the Treeshrews (Scandentia, Tupaiidae) from the Palawan Faunal Region
Journal of Mammalian Evolution, 2014Co-Authors: Eric J. Sargis, Kyle K Campbell, Link E. OlsonAbstract:The taxonomy of treeshrews (Order Scandentia) has long been complicated by ambiguous morphological species boundaries, and the treeshrews of the Palawan faunal region of the Philippines are no exception. Four named forms in the genus Tupaia Raffles, 1821, have been described from four island groups based on subtle qualitative morphological characters, and as many as three distinct species have been recognized. A recent molecular phylogenetic study of relationships among Tupaia species suggests that the two currently-recognized treeshrew species from the Palawan faunal region diverged very recently relative to other sister-species divergences within the genus and may not represent species-level taxonomic entities. Here we review the taxonomic and biogeographic histories of the Tupaia taxa from this region. We also collected craniodental data from 133 skulls of all four named forms, representing five island populations, and conducted univariate and multivariate analyses on these data. Our morphometric results are consistent with molecular results, further suggesting that there is insufficient evidence to recognize T . moellendorffi Matschie, 1898, as a separate species from T . palawanensis Thomas, 1894. Our analyses also revealed a craniodentally divergent population from the island of Balabac, which has never been considered a distinct subspecies (or species) from the population on Palawan. These results have conservation implications for the island populations in our analyses, but additional surveys and molecular evidence will be required to fully assess conservation priorities for the treeshrews of the Palawan faunal region.
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island history affects faunal composition the treeshrews mammalia scandentia Tupaiidae from the mentawai and batu islands indonesia
Biological Journal of The Linnean Society, 2014Co-Authors: Eric J. Sargis, Neal Woodman, Natalie C Morningstar, Aspen T Reese, Link E. OlsonAbstract:The Mentawai and Batu Island groups off the west coast of Sumatra have a complicated geological and biogeographical history. The Batu Islands have shared a connection with the Sumatran ‘mainland’ during periods of lowered sea level, whereas the Mentawai Islands, despite being a similar distance from Sumatra, have remained isolated from Sumatra, and probably from the Batu Islands as well. These contrasting historical relationships to Sumatra have influenced the compositions of the respective mammalian faunas of these island groups. Treeshrews (Scandentia, Tupaiidae) from these islands have, at various times in their history, been recognized as geographically circumscribed populations of a broadly distributed Tupaia glis, subspecies, or distinct species. We used multivariate analyses of measurements from the skull and hands to compare the island populations from Siberut (Mentawai Islands) and Tanahbala (Batu Islands) with the geographically adjacent species from the southern Mentawai Islands (T. chrysogaster) and Sumatra (T. ferruginea). Results from both the skull and manus of the Siberut population show that it is most similar to T. chrysogaster, whereas the Tanahbala population is more similar to T. ferruginea, confirming predictions based on island history. These results are further corroborated by mammae counts. Based on these lines of evidence, we include the Siberut population in T. chrysogaster and the Tanahbala population in T. ferruginea. Our conclusions expand the known distributions of both the Mentawai and Sumatran species. The larger geographical range of the endangered T. chrysogaster has conservation implications for this Mentawai endemic, so populations and habitat should be re-evaluated on each of the islands it inhabits. However, until such a re-evaluation is conducted, we recommend that the IUCN Red List status of this species be changed from ‘Endangered’ to ‘Data Deficient’. Published 2013. This article is a U.S. Government work and is in the public domain in the USA, Biological Journal of the Linnean Society, 2014, 111, 290–304.
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taxonomic boundaries and craniometric variation in the treeshrews scandentia Tupaiidae from the palawan
2014Co-Authors: Eric J. Sargis, Kyle K Campbell, Link E. OlsonAbstract:Abstract The taxonomy of treeshrews (Order Scandentia)has long been complicated by ambiguous morphologicalspecies boundaries, and the treeshrews of the Palawan fau-nal region of the Philippines are no exception. Four namedforms in the genus Tupaia Raffles, 1821, have been de-scribed from four island groups based on subtle qualitativemorphological characters, and as many as three distinctspecies have been recognized. A recent molecular phyloge-netic study of relationships among Tupaia species suggeststhat the two currently-recognized treeshrew species from thePalawan faunal region diverged very recently relative toother sister-species divergences within the genus and maynot represent species-level taxonomic entities. Here we re-view the taxonomic and biogeographic histories of theTupaia taxa from this region. We also collected craniodentaldata from 133 skulls of all four named forms, representingfive island populations, and conducted univariate and mul-tivariate analyses on these data. Our morphometric resultsare consistent with molecular results, further suggesting thatthere is insufficient evidence to recognize T. moellendorffiMatschie, 1898, as a separate species from T. palawanensisThomas, 1894. Our analyses also revealed a craniodentallydivergent population from the island of Balabac, which hasnever been considered a distinct subspecies (or species)from the population on Palawan. These results have conser-vation implications for the island populations in our analy-ses, but additional surveys and molecular evidence will berequired to fully assess conservation priorities for thetreeshrews of the Palawan faunal region.Keywords Cranium .Morphology .Philippines .Skull .Taxonomy .TupaiaIntroductionBackgroundTreeshrews (Scandentia) are an ordinal clade of Indomalayansmall mammals whose interordinal relationships have beenwell studied and debated (reviewed by Sargis 2004, 2007;Sargisetal.2013).Despitethis,thespecies-leveltaxonomyoftreeshrews has not been comprehensively reviewed since thefirst and only monographic account was published a centuryago(Lyon1913).Boutsofsplittingandlumpingasrecentlyasthe 1990s have served to further obscure the taxonomicboundaries and evolutionary history of treeshrews (e.g.,Corbet and Hill 1992; Olson et al. 2005; Sargis et al. 2013).One group in particular, the species complex of TupaiapalawanensisThomas,1894(Sanborn1952),hasexperienceda dynamic taxonomic history of recurrent species elevationsand synonymizations.The T. palawanensis species complex is endemic to thePalawan faunal region of the Philippines (Fig. 1). As cur-rently recognized (Helgen 2005), the monotypic Palawantreeshrew, T. palawanensis, is distributed throughout theisland of Palawan and its associated minor islands (e.g.,Balabac), while the Calamian treeshrew, T. moellendorffiMatschie, 1898, is represented by three subspecies on the
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morphological distinctiveness of javan tupaia hypochrysa scandentia Tupaiidae
Journal of Mammalogy, 2013Co-Authors: Eric J. Sargis, Neal Woodman, Natalie C Morningstar, Aspen T Reese, Link E. OlsonAbstract:The common treeshrew, Tupaia glis, represents a species complex with a complicated taxonomic history. It is distributed mostly south of the Isthmus of Kra on the Malay Peninsula and surrounding islands. In our recent revision of a portion of this species complex, we did not fully assess the population from Java (T. ‘‘glis’’ hypochrysa) because of our limited sample. Herein, we revisit this taxon using multivariate analyses in comparisons with T. glis, T. chrysogaster of the Mentawai Islands, and T. ferruginea from Sumatra. Analyses of both the manus and skull of Javan T. ‘‘glis’’ hypochrysa show it to be most similar to T. chrysogaster and distinct from both T. glis and T. ferruginea. Yet, the Javan population and T. chrysogaster have different mammae counts, supporting recognition of T. hypochrysa as a distinct species. The change in taxonomic status of T. hypochrysa has conservation implications for both T. glis and this Javan endemic.
Aspen T Reese - One of the best experts on this subject based on the ideXlab platform.
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island history affects faunal composition the treeshrews mammalia scandentia Tupaiidae from the mentawai and batu islands indonesia
Biological Journal of The Linnean Society, 2014Co-Authors: Eric J. Sargis, Neal Woodman, Natalie C Morningstar, Aspen T Reese, Link E. OlsonAbstract:The Mentawai and Batu Island groups off the west coast of Sumatra have a complicated geological and biogeographical history. The Batu Islands have shared a connection with the Sumatran ‘mainland’ during periods of lowered sea level, whereas the Mentawai Islands, despite being a similar distance from Sumatra, have remained isolated from Sumatra, and probably from the Batu Islands as well. These contrasting historical relationships to Sumatra have influenced the compositions of the respective mammalian faunas of these island groups. Treeshrews (Scandentia, Tupaiidae) from these islands have, at various times in their history, been recognized as geographically circumscribed populations of a broadly distributed Tupaia glis, subspecies, or distinct species. We used multivariate analyses of measurements from the skull and hands to compare the island populations from Siberut (Mentawai Islands) and Tanahbala (Batu Islands) with the geographically adjacent species from the southern Mentawai Islands (T. chrysogaster) and Sumatra (T. ferruginea). Results from both the skull and manus of the Siberut population show that it is most similar to T. chrysogaster, whereas the Tanahbala population is more similar to T. ferruginea, confirming predictions based on island history. These results are further corroborated by mammae counts. Based on these lines of evidence, we include the Siberut population in T. chrysogaster and the Tanahbala population in T. ferruginea. Our conclusions expand the known distributions of both the Mentawai and Sumatran species. The larger geographical range of the endangered T. chrysogaster has conservation implications for this Mentawai endemic, so populations and habitat should be re-evaluated on each of the islands it inhabits. However, until such a re-evaluation is conducted, we recommend that the IUCN Red List status of this species be changed from ‘Endangered’ to ‘Data Deficient’. Published 2013. This article is a U.S. Government work and is in the public domain in the USA, Biological Journal of the Linnean Society, 2014, 111, 290–304.
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morphological distinctiveness of javan tupaia hypochrysa scandentia Tupaiidae
Journal of Mammalogy, 2013Co-Authors: Eric J. Sargis, Neal Woodman, Natalie C Morningstar, Aspen T Reese, Link E. OlsonAbstract:The common treeshrew, Tupaia glis, represents a species complex with a complicated taxonomic history. It is distributed mostly south of the Isthmus of Kra on the Malay Peninsula and surrounding islands. In our recent revision of a portion of this species complex, we did not fully assess the population from Java (T. ‘‘glis’’ hypochrysa) because of our limited sample. Herein, we revisit this taxon using multivariate analyses in comparisons with T. glis, T. chrysogaster of the Mentawai Islands, and T. ferruginea from Sumatra. Analyses of both the manus and skull of Javan T. ‘‘glis’’ hypochrysa show it to be most similar to T. chrysogaster and distinct from both T. glis and T. ferruginea. Yet, the Javan population and T. chrysogaster have different mammae counts, supporting recognition of T. hypochrysa as a distinct species. The change in taxonomic status of T. hypochrysa has conservation implications for both T. glis and this Javan endemic.
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using hand proportions to test taxonomic boundaries within the tupaia glis species complex scandentia Tupaiidae
Journal of Mammalogy, 2013Co-Authors: Eric J. Sargis, Neal Woodman, Aspen T Reese, Link E. OlsonAbstract:Treeshrews (order Scandentia) comprise 2 families of squirrel-sized terrestrial, arboreal, and scansorial mammals distributed throughout much of tropical South and Southeast Asia. The last comprehensive taxonomic revision of treeshrews was published in 1913, and a well-supported phylogeny clarifying relationships among all currently recognized extant species within the order has only recently been published. Within the family Tupaiidae, 2 widely distributed species, the northern treeshrew, Tupaia belangeri (Wagner, 1841), and the common treeshrew, T. glis (Diard, 1820), represent a particularly vexing taxonomic complex. These 2 species are currently distinguished primarily based on their respective distributions north and south of the Isthmus of Kra on the Malay Peninsula and on their different mammae counts. This problematic species complex includes 54 published synonyms, many of which represent putative island endemics. The widespread T. glis and T. belangeri collectively comprise a monophyletic assemblage representing the sister lineage to a clade composed of the golden-bellied treeshrew, T. chrysogaster Miller, 1903 (Mentawai Islands), and the long-footed treeshrew, T. longipes (Thomas, 1893) (Borneo). As part of a morphological investigation of the T. glis–T. belangeri complex, we studied the proportions of hand bones, which have previously been shown to be useful in discriminating species of soricids (true shrews). We measured 38 variables from digital X-ray images of 148 museum study skins representing several subspecies of T. glis, T. belangeri, T. chrysogaster, and T. longipes and analyzed these data using principal components and cluster analyses. Manus proportions among these 4 species readily distinguish them, particularly in the cases of T. chrysogaster and T. longipes. We then tested the distinctiveness of several of the populations comprising T. glis and T. longipes. T. longipes longipes and T. l. salatana Lyon, 1913, are distinguishable from each other, and populations of T. ‘‘glis’’ from Bangka Island and Sumatra are distinct from those on the Malay Peninsula, supporting the recognition of T. salatana, T. discolor Lyon, 1906, and T. ferruginea Raffles, 1821 as distinct species in Indonesia. These relatively small, potentially vulnerable treeshrew populations occur in the Sundaland biodiversity hotspot and will require additional study to determine their appropriate conservation status.
Paul T Brey - One of the best experts on this subject based on the ideXlab platform.
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new locality records of ixodes granulatus and ixodes vespertilionis acari ixodidae from tree shrews scandentia Tupaiidae and bats chiroptera hipposideridae in laos
Journal of Medical Entomology, 2018Co-Authors: Khamsing Vongphayloth, Bounsavane Douangboubpha, Daosavanh Sanamxay, Vilakhan Xayaphet, Richard G Robbins, Dmitry A Apanaskevich, Ian W Sutherland, Paul T BreyAbstract:Between May and June 2015, 512 bats, six rodents, and six tree-shrews were examined for ectoparasites in Vientiane and Khammouane Provinces, Laos. Thirty-seven ticks (33 females and four males) identified as Ixodes granulatus Supino were collected from four individuals of the Northern tree-shrew, Tupaia belangeri (Wagner) (Scandentia:Tupaiidae), and one female of Ixodes vespertilionis Koch was collected from one individual of the Intermediate Leaf-nosed Bat, Hipposideros larvatus (Horsfield) (Chiroptera:Hipposideridae). This appears to be the first record of I. vespertilionis from Laos, as well as the first record of this host–parasite relationship in the Southeast Asia region.
Ian W Sutherland - One of the best experts on this subject based on the ideXlab platform.
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new locality records of ixodes granulatus and ixodes vespertilionis acari ixodidae from tree shrews scandentia Tupaiidae and bats chiroptera hipposideridae in laos
Journal of Medical Entomology, 2018Co-Authors: Khamsing Vongphayloth, Bounsavane Douangboubpha, Daosavanh Sanamxay, Vilakhan Xayaphet, Richard G Robbins, Dmitry A Apanaskevich, Ian W Sutherland, Paul T BreyAbstract:Between May and June 2015, 512 bats, six rodents, and six tree-shrews were examined for ectoparasites in Vientiane and Khammouane Provinces, Laos. Thirty-seven ticks (33 females and four males) identified as Ixodes granulatus Supino were collected from four individuals of the Northern tree-shrew, Tupaia belangeri (Wagner) (Scandentia:Tupaiidae), and one female of Ixodes vespertilionis Koch was collected from one individual of the Intermediate Leaf-nosed Bat, Hipposideros larvatus (Horsfield) (Chiroptera:Hipposideridae). This appears to be the first record of I. vespertilionis from Laos, as well as the first record of this host–parasite relationship in the Southeast Asia region.
