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Morphometrics confirm taxonomic deflation in dwarf lemurs (Primates: Cheirogaleidae), as suggested by genetics
No full textFigure 2. Allometric and non-allometric craniodental characters in Cheirogaleus. (A) Palatal length (PALL), (B) temporal line (TpLi), and (C) second premolar height (P2), given in mm, are scaled against the greatest skull length (GSKL) for Cheirogaleus medius, Cheirogaleus adipicaudatus, Cheirogaleus major, Cheirogaleus ravus, Cheirogaleus sibreei, and unknown specimens, as assessed by Groves (2000).Published as part of Groeneveld, Linn F., Rasoloarison, Rodin M. & Kappeler, Peter M., 2011, Morphometrics confirm taxonomic deflation in dwarf lemurs (Primates: Cheirogaleidae), as suggested by genetics, pp. 229-244 in Zoological Journal of the Linnean Society 161 (1) on page 235, DOI: 10.1111/j.1096-3642.2010.00634.x, http://zenodo.org/record/575625
Results of a reconnaissance expedition in the western dry forests between Morondava and Morombe
No full textResults of a reconnaissance expedition in the western dry forests between Morondava and Morombe
No full textFIG. 2 in On the specific identification of subfossil Cryptoprocta (Mammalia, Carnivora) from Madagascar
No full textFIG. 2. — Bivariate plots of humerus and tibia measurements of modern (black) and subfossil (white) specimens of Cryptoprocta Bennett, 1833. The two bones were chosen for illustration because they represent cases of good separation (humerus) and the bone with the smallest differences (tibia) between modern and the subfossil sample.Published as part of Goodman, Steven M., Rasoloarison, Rodin M. & Ganzhorn, Jörg U., 2004, On the specific identification of subfossil Cryptoprocta (Mammalia, Carnivora) from Madagascar, pp. 129-143 in Zoosystema 26 (1) on page 137, DOI: 10.5281/zenodo.540046
Figure 1 in Morphometrics confirm taxonomic deflation in dwarf lemurs (Primates: Cheirogaleidae), as suggested by genetics
No full textFigure 1. Sampling localities. Sampling sites of both the field samples and the museum specimens included in the analyses of this study are marked with circles. The colours indicate that individuals found at the respective site were classified as Cheirogaleus medius (yellow), Cheirogaleus major (red), and Cheirogaleus crossleyi (blue), or could not be clearly classified (white) by the analyses presented in this study. The Sambava locality is marked by two circles, as two different species were collected at this site. The asterisks denote sites that were newly sampled for this study.Published as part of Groeneveld, Linn F., Rasoloarison, Rodin M. & Kappeler, Peter M., 2011, Morphometrics confirm taxonomic deflation in dwarf lemurs (Primates: Cheirogaleidae), as suggested by genetics, pp. 229-244 in Zoological Journal of the Linnean Society 161 (1) on page 232, DOI: 10.1111/j.1096-3642.2010.00634.x, http://zenodo.org/record/575625
Figure 1 in Morphometrics confirm taxonomic deflation in dwarf lemurs (Primates: Cheirogaleidae), as suggested by genetics
No full textFigure 1. Sampling localities. Sampling sites of both the field samples and the museum specimens included in the analyses of this study are marked with circles. The colours indicate that individuals found at the respective site were classified as Cheirogaleus medius (yellow), Cheirogaleus major (red), and Cheirogaleus crossleyi (blue), or could not be clearly classified (white) by the analyses presented in this study. The Sambava locality is marked by two circles, as two different species were collected at this site. The asterisks denote sites that were newly sampled for this study.Published as part of Groeneveld, Linn F., Rasoloarison, Rodin M. & Kappeler, Peter M., 2011, Morphometrics confirm taxonomic deflation in dwarf lemurs (Primates: Cheirogaleidae), as suggested by genetics, pp. 229-244 in Zoological Journal of the Linnean Society 161 (1) on page 232, DOI: 10.1111/j.1096-3642.2010.00634.x, http://zenodo.org/record/575625
Morphology, behaviour and molecular evolution of giant mouse lemurs (Mirza spp.) Gray, 1870, with description of a new species
No full textGi ant mouse le murs (ge nus Mir za) are small noc tur nal pri mates en demic to Mad a gas car, of which a sin gle spe cies (M. coquereli) is cur rently rec og nized. It is dis - trib uted along Mad a gas car’s west coast, with a gap of sev eral hun dred kilo metres be tween two pre sumed subpopulations. Pre vi ous stud ies in the field and in cap tiv ity in di cated sub stan tial dif fer ences in sev eral as pects of the bi ol ogy of these two subpopulations. We there fore col lected morphometric, ge netic and be hav ioural data from pop u la tions rep re sent ing the south ern and north ern end of their range to ex - am ine these dif fer ences in more de tail. We ob tained stan dard morphometric field mea sure ments and DNA sam ples from a to tal of 74 adult males and fe males at Kirindy (cen tral west ern Mad a gas car) and Ambato (north west ern Mad a gas car) and com pared their so cial or gani sa tion. We also stud ied a to tal of 9 Mir za spec i mens housed at the Rijksmuseum van Natuurlijke Historie Leiden (The Neth er lands). Our morphometric anal y ses re vealed that the two Mir za pop u la tions dif fered sig nif - i cantly in 12 out of 13 mea sures, with the north ern Mir za sport ing smaller val ues in all traits ex cept tes tes vol ume. North ern Mir za spent the day in nests with 2-8 (mean 4.1) in di vid u als, whereas Mir za in the south vir tu ally al ways slept alone. More over, re pro duc tion in the north ern pop u la tion oc curred sev eral months ear lier than in the south. We also se quenced the com plete mi to chon drial cytochrome b (cyt b) gene from sev eral spec i mens and found that (1) the two pop u la tions dif fered by 3.33-3.51 %, which is sim i lar to ge netic dis tances ob served among sev eral closely re - lated spe cies of mouse le murs (Microcebus), (2) DNA ex tracted from tis sue on skulls col lected in 1868/1870 yielded par tial cyt b se quences that aligned per fectly with the north ern and south ern pop u la tion sam ples, re spec tively, and (3) Microcebus from Andasibe clearly dif fered ge net i cally from all other known mouse le mur spe cies, in - di cat ing a sep a rate spe cies sta tus for this pop u la tion. Based on the com bi na tion of mor pho log i cal, be hav ioural and ge netic dif fer ences be tween Mir za from Kirindy and Ambato we con clude that they should be sep a rated at the spe cies level. Be cause M. coquereli was de scribed based on a spec i men from the south ern pop u la tion, we de - scribe the north ern Mir za as a spe cies new to sci ence
Two New Species of Mouse Lemurs (Cheirogaleidae: Microcebus) from Eastern Madagascar
No full textThe number of newly discovered Malagasy vertebrate taxa has multiplied in recent years, emphasizing the importance of complete taxon sampling for phylogenetics, biogeography, functional ecology, and conservation biology, especially in such a biodiversity hotspot. In particular, the diversity of extant lemurs is much higher than previously thought, and we have yet to comprehend fully the full extent of lemuriform biodiversity. A recent genetic analysis of mtDNA and nDNA sequence data in Malagasy mouse lemurs revealed the existence of several novel mtDNA clades based on new field sampling. These geographically defined and previously unrecognized mtDNA clades corresponded precisely to patterns of population structure revealed in the analysis of the nDNA data, thus confirming their evolutionary divergence from other mouse lemur clades. Two of these independently evolving lineages correspond to specimens that were collected by us in the Marolambo and Manantantely/Ivorona regions. Here we summarize the genetic evidence and report on the morphometric and external characteristics of these animals, formally describing them as new species. This report thus brings the number of currently recognized and described mouse lemur species to 20. The forests in which these mouse lemurs were discovered have been heavily degraded in the past decade, prompting the classification of one of the new species as Endangered by the IUCN, even before its formal description. As with several other newly described lemur species, immediate field studies and appropriate conservation actions are therefore urgent
Cheirogaleid diversity and evolution: big questions about small primates
No full textThe family Cheirogaleidae is arguably the most interesting group of primates alive today. Within this single clade, hypothesized to have originated approximately 25–30 Mya, we find the world's smallest living primate (genus Microcebus), one species that went “missing” for more than three decades (genus Allocebus), the only known obligate hibernator within the primates (genus Cheirogaleus), the only primate species that preys upon other members of its phylogenetic family (genus Mirza), and also, a taxonomic system that has exploded within the past two decades. This taxonomic explosion has been decidedly lopsided, however. Whereas the genus Allocebus has remained monotypic, containing the single species A. trichotis since its original description in 1875 (Günther 1875), the genus Microcebus (mouse lemurs) has gone from a two species system as recently as 1993 to one that that now contains more than 20 recognized species. This apparent skew in species-level diversity cries out for further exploration. Is it an artifact of organismal and geographic sampling bias, with certain species and ecosystems preferentially sampled, or is it based in biology, with some branches of the cheirogaleid tree (namely, the mouse lemurs) intrinsically more prone to evolutionary divergence? An exploration of these themes and questions is our goal in this chapter. The first genus-level phylogeny of the cheirogaleid lemurs was published by Rumpler et al. (1994) and has remained virtually unchanged in the subsequent decades. Using karyotype data and restriction fragment analysis, the authors found strong support for the phylogeny illustrated in Figure 1.1. Notably, Rumpler and Albignac (1972) had long before discovered that the karyotype of Phaner (2n = 46) is quite distinct from that of the other four genera (2n = 66), leading those authors to propose a two-subfamily taxonomy of the Cheirogaleidae, the monotypic Phanerinae (including only the genus Phaner) and the Cheirogaleinae (comprising the four remaining genera). More recent molecular phylogenetic analyses have sampled more densely at the species level and have yielded fresh insights into interspecific relationships within the various genera, while leaving the “skeleton” of the phylogeny unchanged
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