Two new species of Philippine forest mice (<i>Apomys</i>, Muridae, Rodentia) from Lubang and Luzon Islands, with a redescription of<i>Apomys sacobianus</i>Johnson, 1962

Heaney, Lawrence R.; Balete, Danilo S.; Veluz, Maria Josefa; Steppan, Scott J.; Esselstyn, Jacob A.; Pfeiffer, A.; Rickart, Eric A.

doi:10.2988/0006-324x-126.4.395

Cited by 10 publications

(11 citation statements)

References 13 publications

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“…Taxa were designated as high (predominantly > 1500 m), middle (median approximately 1500 m), or low (predominantly < 1500 m) elevation based on their distributions described in Heaney et al . (, ; Fig. b).…”

Section: Methodsmentioning

confidence: 87%

“…The genus is partitioned into two well‐supported monophyletic subgenera: Megapomys and Apomys . Members of the subgenus Apomys are predominantly small and arboreal (18–41 g; Heaney et al ., ), while Megapomys species are large and ground‐dwelling (70–110 g; Heaney et al ., , ). Recent biodiversity surveys have increased our awareness of the species‐rich mammalian fauna on Luzon, the largest and most topographically complex island in the Philippines (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Recent biodiversity surveys have increased our awareness of the species‐rich mammalian fauna on Luzon, the largest and most topographically complex island in the Philippines (e.g. Heaney et al ., ; Heaney, ), including the discovery of eight new Megapomys species on Luzon, plus one on an adjacent small island (Heaney et al ., , ), for a total of 13 species in the subgenus. Most species of Megapomys are limited to one mountain range on Luzon Island (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Locations of samples analysed in this study (Appendix 1) are shown in boldface. (b) Elevational distribution for all known samples of Megapomys species (data from Heaney et al ., , ).…”

Section: Introductionmentioning

confidence: 99%

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Testing diversification models of endemic Philippine forest mice (Apomys) with nuclear phylogenies across elevational gradients reveals repeated colonization of isolated mountain ranges

Justiniano

Schenk

Balete

et al. 2014

Journal of Biogeography

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Aim Our aims were to document the extent of diversification in an endemic clade of small mammals (Apomys, subgenus Megapomys) on a large oceanic island and to test whether speciation occurred primarily (1) along isolated elevational gradients or (2) among montane areas, as would be expected if diversification were driven by glacial cycles.Location The Philippine archipelago, particularly Luzon Island and two smaller adjacent islands (Mindoro and Lubang).Methods We analysed newly generated nuclear DNA sequences from five unlinked genes and mitochondrial cytochrome b using concatenation (likelihood and Bayesian) and coalescent-based methods to estimate the species tree for all 13 species. We tested a priori models of speciation using both topological constraints and reconstructed elevational ranges of ancestors.Results All individual gene trees recovered at least four of the morphologically defined Megapomys species as monophyletic, while the concatenated approaches recovered all 13 species as monophyletic. Each species was confined to a single mountain range or off-shore island. Most mountain ranges had two species, but these species pairs usually were not sisters. Megapomys originated at medium to high elevation followed by three transitions into lower elevations and possibly one to high elevation. Both a priori models of speciation (elevational gradient and glacial cycle) were rejected by topology tests. The speciation rate was approximately constant through time.Main conclusions Nuclear sequence data strongly corroborated the species status of recently described taxa. A well-supported phylogeny showed that Megapomys diversified by splitting into a predominantly high-elevation clade and an entirely low-elevation clade. Neither adaptation along elevational gradients on single mountain ranges nor vicariance of high-elevation species following glacial cycle-induced dispersals fitted the data. Rather, the most likely process explaining species distributions is repeated colonization of isolated mountain ranges by distantly related species.

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Section: Methodsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Locations of samples analysed in this study (Appendix 1) are shown in boldface. (b) Elevational distribution for all known samples of Megapomys species (data from Heaney et al ., , ).…”

Section: Introductionmentioning

confidence: 99%

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Testing diversification models of endemic Philippine forest mice (Apomys) with nuclear phylogenies across elevational gradients reveals repeated colonization of isolated mountain ranges

Justiniano

Schenk

Balete

et al. 2014

Journal of Biogeography

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“…The phylogenetic structure of the Mt. Amuyao fauna reflects the infrequency of colonization from outside the oceanic Philippines, the great age of the Cordillera region, the early colonization of the region by murid rodents during the Miocene, and the overriding importance of autochthonous diversification in the formation of the Luzon fauna (Jansa et al 2006, 2014a, 2014b, 2016, Justiniano et al 2014.…”

Section: Elevation and Species Richnessmentioning

confidence: 99%

The mammals of Mt. Amuyao: a richly endemic fauna in the Central Cordillera of northern Luzon Island, Philippines

et al. 2016

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Faunas of old oceanic islands often have extremely high levels of endemism and are considered highly susceptible to anthropogenic disruption. We surveyed the richly endemic small mammal fauna on Mt. Amuyao in the Central Cordillera of northern Luzon Island, Philippines. We tested hypotheses regarding elevational patterns of species richness and community composition, community response to habitat disturbance, and interactions of native and non-native mammals. Our study revealed greater species richness and faunal heterogeneity within the Central Cordillera than previously suspected. We documented 15 native species (14 rodents and 1 insectivore), and two species of non-native rodents. All of the native species are endemic to the Philippines, eight being restricted to the Cordillera. Twelve of the 14 native rodents belong to two ancient endemic clades, indicating that most of the regional diversity is the product of in situ speciation. Native mammal assemblages are ecologically diverse, and include species with varied trophic habits, activity patterns, and climbing ability. Some native species are restricted to relatively pristine habitat, whereas others are highly tolerant of disturbance. Non-native species are restricted to highly disturbed habitats and apparently are displaced by natives where habitat has regenerated from past disturbance.

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Geographic isolation and elevational gradients promote diversification in an endemic shrew on Sulawesi

Eldridge

Achmadi

Giarla

et al. 2018

Molecular Phylogenetics and Evolution

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Two new species of Philippine forest mice (Apomys, Muridae, Rodentia) from Lubang and Luzon Islands, with a redescription ofApomys sacobianusJohnson, 1962

Cited by 10 publications

References 13 publications

Testing diversification models of endemic Philippine forest mice (Apomys) with nuclear phylogenies across elevational gradients reveals repeated colonization of isolated mountain ranges

Testing diversification models of endemic Philippine forest mice (Apomys) with nuclear phylogenies across elevational gradients reveals repeated colonization of isolated mountain ranges

The mammals of Mt. Amuyao: a richly endemic fauna in the Central Cordillera of northern Luzon Island, Philippines

Geographic isolation and elevational gradients promote diversification in an endemic shrew on Sulawesi

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