Molecular phylogeny of South‐East Asian arboreal murine rodents

Pagès, Marie; Fabre, Pierre‐Henri; Chaval, Yannick; Mortelliti, Alessio; Nicolas, Violaine; Wells, Konstans; Michaux, Johan; Lazzari, Vincent

doi:10.1111/zsc.12161

Cited by 24 publications

(23 citation statements)

References 48 publications

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“…Within the Old World mice and rats Murinae ( Fig 2 , section B), we identified the marmoset mice Hapalomys of SE Asia lineage diverging from remaining Murinae around 12.9 mya. This genus of two species has been poorly studied before and enigmatic, with “highly derived” dentition [ 21 ], and our results corroborate the only other study to include it [ 53 ]. Notably, Hapalomys had never been suggested as being so divergent from any other murine.…”

Section: Resultssupporting

confidence: 87%

Muroid rodent phylogenetics: 900-species tree reveals increasing diversification rates

2017

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We combined new sequence data for more than 300 muroid rodent species with our previously published sequences for up to five nuclear and one mitochondrial genes to generate the most widely and densely sampled hypothesis of evolutionary relationships across Muroidea. An exhaustive screening procedure for publically available sequences was implemented to avoid the propagation of taxonomic errors that are common to supermatrix studies. The combined data set of carefully screened sequences derived from all available sequences on GenBank with our new data resulted in a robust maximum likelihood phylogeny for 900 of the approximately 1,620 muroids. Several regions that were equivocally resolved in previous studies are now more decisively resolved, and we estimated a chronogram using 28 fossil calibrations for the most integrated age and topological estimates to date. The results were used to update muroid classification and highlight questions needing additional data. We also compared the results of multigene supermatrix studies like this one with the principal published supertrees and concluded that the latter are unreliable for any comparative study in muroids. In addition, we explored diversification patterns as an explanation for why muroid rodents represent one of the most species-rich groups of mammals by detecting evidence for increasing net diversification rates through time across the muroid tree. We suggest the observation of increasing rates may be due to a combination of parallel increases in rate across clades and high average extinction rates. Five increased diversification-rate-shifts were inferred, suggesting that multiple, but perhaps not independent, events have led to the remarkable species diversity in the superfamily. Our results provide a phylogenetic framework for comparative studies that is not highly dependent upon the signal from any one gene.

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Section: Resultssupporting

confidence: 87%

Muroid rodent phylogenetics: 900-species tree reveals increasing diversification rates

2017

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“…; Pagès et al. ; this study). Likewise, the placement of Millardia (represented here by M. kathleenae ) varies depending on analytical approach (Fig.…”

Section: Resultssupporting

confidence: 62%

“…Our study corroborates previous molecular studies that fail to find the suggested alliance of Vandeleuria oleracea with Chiropodomys that has been postulated based on dental characters (Musser and Carleton 2005) and instead strongly supports a sister-taxon relationship between Chiropodomys and the clade containing Chrotomyini + SOE murines (Schenk et al 2013; Steppan and Schenk 2017). Otherwise, the phylogenetic position of Vandeleuria is not secure in any molecular analysis to date (Schenk et al 2013;Pagès et al 2016;this study). Likewise, the placement of Millardia (represented here by M. kathleenae) varies depending on analytical approach (Fig.…”

Section: Phylogenetic Relationships Among Murinesmentioning

confidence: 89%

“…Sequences from additional murid species were chosen primarily from publicly available sources obtained from previous studies (Steppan et al 2005;Rowe et al 2008;Benson et al 2013;Schenk et al 2013;Pagès et al 2016;Rowe et al 2016;P.-H. Fabre, Université Montpellier II, personal communication, August 2017) and were included to place the Philippine murine radiations in the context of murid phylogeny and to provide the best possible divergence date estimates given available fossil data. We selected taxa from subfamilies Gerbillinae, Deomyinae, and Lophiomyinae as outgroups based on their close phylogenetic proximity to Murinae (Schenk et al 2013;Pagès et al 2016;Steppan and Schenk 2017).…”

Section: Taxon Samplingmentioning

confidence: 99%

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Diversification rates of the “Old Endemic” murine rodents of Luzon Island, Philippines are inconsistent with incumbency effects and ecological opportunity

2018

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Diversity-dependent cladogenesis occurs when a colonizing lineage exhibits increasing interspecific competition as it ecologically diversifies. Repeated colonization of a region by closely related taxa may cause similar effects as species within each lineage compete with one another. This may be particularly relevant for secondary colonists, which could experience limited diversification due to competition with earlier, incumbent colonists over evolutionary time. We tested the hypothesis that an incumbent lineage may diminish the diversification of secondary colonists in two speciose clades of Philippine "Old Endemic" murine rodents-Phloeomyini and Chrotomyini-on the relatively old oceanic island of Luzon. Although phylogenetic analyses confirm the independent, noncontemporaneous colonization of Luzon by the ancestors of these two clades, we found no support for arrested diversification in either. Rather, it appears that diversification of both clades resulted from constant-rate processes that were either uniform or favored the secondary colonists (Chrotomyini), depending on the method used. Our results suggest that ecological incumbency has not played an important role in determining lineage diversification among Luzon murines, despite sympatric occurrence by constituent species within each lineage, and a substantial head start for the primary colonists.

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“…; Pagès et al. ). Carnivorous murid divisions are in bold; omnivorous and herbivorous lineages are in black.…”

Section: Introductionmentioning

confidence: 97%

Masticatory muscle architecture in a water‐rat from Australasia (Murinae, Hydromys) and its implication for the evolution of carnivory in rodents

et al. 2017

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Murines are well known for their generalist diet, but several of them display specializations towards a carnivorous diet such as the amphibious Indo-Pacific water-rats. Despite the fact that carnivory evolved repeatedly in this group, few studies have investigated associated changes in jaw muscle anatomy and biomechanics. Here, we describe the jaw muscles and cranial anatomy of a carnivorous water-rat, Hydromys chrysogaster. The architecture of the jaw musculature of six specimens captured both on Obi and Papua were studied and described using dissections. We identified the origin and insertions of the jaw muscles, and quantified muscle mass, fiber length, physiological cross-sectional area, and muscle vectors for each muscle. Using a biomechanical model, we estimated maximum incisor and molar bite force at different gape angles. Finally, we conducted a 2D geometric morphometric analyses to compare jaw shape, mechanical potential, and diversity in lever-arm ratios for a set of 238 specimens, representative of Australo-Papuan carnivorous and omnivorous murids. Our study reveals major changes in the muscle proportions among Hydromys and its omnivorous close relative, Melomys. Hydromys was found to have large superficial masseter and temporalis muscles as well as a reduced deep masseter and zygomatico-mandibularis, highlighting major functional divergence among omnivorous and carnivorous murines. Changes in these muscles are also accompanied by changes in jaw shape and the lines of action of the muscles. A more vertically oriented masseter, reduced masseteric muscles, as well as an elongated jaw with proodont lower incisors are key features indicative of a reduced propalinality in carnivorous Hydromys. Differences in the fiber length of the masseteric muscles were also detected between Hydromys and Melomys, which highlight potential adaptations to a wide gape in Hydromys, allowing it to prey on larger animals. Using a biomechanical model, we inferred a greater bite force in Hydromys than in Melomys, implying a functional shift between omnivory and carnivory. However, Melomys has an unexpected greater bite force at large gape compared with Hydromys. Compared with omnivorous Melomys, Hydromys have a very distinctive low mandible with a well-developed coronoid process, and a reduced angular process that projects posteriorly to the ascending rami. This jaw shape, along with our mechanical potential and jaw lever ratio estimates, suggests that Hydromys has a faster jaw closing at the incisor, with a higher bite force at the level of the molars. The narrowing of the Hydromys jaw explains this higher lever advantage at the molars, which constitutes a good compromise between a wide gape, a reduced anterior masseteric mass, and long fiber lengths. Lever arms of the superficial and deep masseter are less favourable to force output of the mandible in Hydromys but more favourable to speed. Compared with the small input lever arm defined between the condyle and the angular process, the relatively longer mandible of Hydromys incr...

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Molecular phylogeny of South‐East Asian arboreal murine rodents

Cited by 24 publications

References 48 publications

Muroid rodent phylogenetics: 900-species tree reveals increasing diversification rates

Muroid rodent phylogenetics: 900-species tree reveals increasing diversification rates

Diversification rates of the “Old Endemic” murine rodents of Luzon Island, Philippines are inconsistent with incumbency effects and ecological opportunity

Masticatory muscle architecture in a water‐rat from Australasia (Murinae, Hydromys) and its implication for the evolution of carnivory in rodents

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