New genus and two new species of Pleistocene oryzomyines (Cricetidae: Sigmodontinae) from Bonaire, Netherlands Antilles

Zijlstra, Jelle S.; Madern, P. A.; Ostende, Lars W. van den Hoek

doi:10.1644/09-mamm-a-208.1

Cited by 13 publications

(13 citation statements)

References 11 publications

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“…Pennatomys is recovered as sister taxon to Aegialomys and in a clade also including Nesoryzomys, and Agathaeromys is found in a polytomy at the base of the core oryzomyines in the combined analysis and not within clade D as in Zijlstra et al (2010). Trees in which Pennatomys and Agathaeromys are constrained to belong in a monophyletic group together with Megalomys are nine steps longer than the fundamental trees, which is statistically significant (p < 0.05) under the Kishino-Hasegawa test for some but not all configurations.…”

Section: Cladistic Analysismentioning

confidence: 92%

“…Barbados oryzomyine skeletal elements were scored for craniodental characters described in Weksler (2006) and employed in previous phylogenetic analyses of extant oryzomyines (Voss and Weksler 2009;Percequillo et al 2011;Pine et al in press), and also used by Turvey et al (2010) and Zijlstra et al (2010) in analyses of other extinct Caribbean oryzomyines. The following multistate characters were split from their original definition (Weksler 2006) and are now treated as multiple characters (numbers refer to characters in Weksler 2006): (1) number of mammae (now treated as two characters for post-axial and pectoral mammae); (22) orbital region shape and crests (now treated as three characters for interorbital shape, presence and size of ridges, and relief of dorsal and lateral orbital facies of frontal); (36) presence and position of sphenopalatine vacuities (now treated as two characters).…”

Section: Character Scoring and Taxonomic Samplingmentioning

confidence: 99%

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A new species of recently extinct rice rat (Megalomys) from Barbados

2012

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a b s t r a c tRecently extinct insular populations of oryzomyine rice rats (Cricetidae: Sigmodontinae) are known from across the Lesser Antilles, but most remain undescribed. Historical records of a possible now-extinct endemic rodent from Barbados are supported by presence of oryzomyine remains in Late Quaternary sites on the island, including several pre-Columbian Holocene archaeological sites. The Barbados oryzomyine is described as Megalomys georginae sp. nov., and is most closely related to species from the nearby islands of Martinique and St. Lucia, M. desmarestii and M. luciae. These species all display a zygomatic plate with its posterior margin level with the alveolus of M1, a divided anterocone on M1, and distinct anterolophids and metaflexids on m2 and m3, and are recovered as a monophyletic clade in morphological-molecular and morphology-only analyses. The new species differs from other Megalomys species in having the labial accessory root of M1 absent, a reduced anteromedian flexus on M1, two roots on m2 and m3, a supratrochlear foramen on the humerus, and in its much smaller body size. Other extinct Caribbean oryzomyines are not recovered in a monophyletic clade with Megalomys.

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Section: Cladistic Analysismentioning

confidence: 92%

Section: Character Scoring and Taxonomic Samplingmentioning

confidence: 99%

A new species of recently extinct rice rat (Megalomys) from Barbados

2012

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“…Together these islands represent the most southwestern component of the Caribbean biodiversity hot spot (Myers et al 2000) with a reptilian fauna that is approximately 50% endemic (Van Buurt 2005, 2006. These arid islands are considered biogeographically isolated from the Caribbean West Indies, with over-water dispersal from the South American mainland hypothesized as the primary pathway for terrestrial colonization (Koopman 1958(Koopman , 1959Staton and Dixon 1977;McFarlane and Lundberg 2002;Debrot 2003;Wüster et al 2005;Zijlstra et al 2010;Muñoz-Garay and Mantilla-Meluk 2012;Rivas et al 2013). Despite the close geographic distance and taxonomic affinity between the ABC islands and the mainland, high rates of endemism have led to the hypothesis that these islands comprise a distinct biogeographic province (Van Buurt 2006).…”

Section: Introductionmentioning

confidence: 99%

Disentangling the Influence of Urbanization and Invasion on Endemic Geckos in Tropical Biodiversity Hot Spots: A Case Study ofPhyllodactylus martini(Squamata: Phyllodactylidae) along an Urban Gradient in Curaçao

Dornburg¹,

Lippi

Federman

et al. 2016

Bulletin of the Peabody Museum of Natural History

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Predicting the response of endemic species to urbanization has emerged as a fundamental challenge in 21st century conservation biology. The factors that underlie population declines of reptiles are particularly nebulous, as these are often the least understood class of vertebrates in a given community. In this study, we assess correlations between feeding ecology and phenotypic traits of the Lesser Antillean endemic Dutch leaf-toed gecko, Phyllodactylus martini, along an urban gradient in the Caribbean island of Curaçao. There has been a marked decline of this species in developed habitats associated with the invasive tropical house gecko Hemidactylus mabouia. We find a correlation between aspects of locomotor morphology and prey in undeveloped habitats that is absent in developed habitats. Analyses of stomach contents further suggest that Phyllodactylus martini alters primary prey items in developed areas. However, changes in prey promote the overlap in foraging niches between Phyllodactylus martini and Hemidactylus mabouia, suggesting that direct resource competition is contributing to the decline of Phyllodactylus martini. In addition to competitive exclusion, we suggest that the urban extirpation of Phyllodactylus martini could also be attributed to a top-down control on population growth by Hemidactylus mabouia. Colonizations of walls put Phyllodactylus martini in direct contact with Hemidactylus mabouia increasing the chances for predation events, as evidenced by our observation of a predation event on a Phyllodactylus martini juvenile by an adult Hemidactylus mabuoia. In total, our results add to a growing body of literature demonstrating the threat that invasive synanthropic reptiles pose to endemics that might otherwise be able to cope with increased urbanization pressures.

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“…; Zijlstra et al . ). All endemic species are now extinct, but several insular populations of mainland species remain, such as Oryzomys palustris on the Florida Keys and Calomys hummelincki on Curaçao in the Dutch Antilles.…”

mentioning

confidence: 97%

“…The cricetid fauna of the islands of Aruba, Curaçao and Bonaire, which are part of the Kingdom of the Netherlands but located before the Venezuelan coast, has recently received some much‐needed attention, which has resulted in the identification of new taxa and in new information on previously known taxa (Martino ; McFarlane and Debrot ; McFarlane and Lundberg ; Voss and Weksler ; Zijlstra et al . ). Still, many species known from fossil and subfossil material remain unidentified, and the affinities of those that have been named are mostly unclear.…”

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confidence: 97%

New rodents (Cricetidae) from the Neogene of Curaçao and Bonaire, Dutch Antilles

et al. 2014

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Cordimus, a new genus of cricetid rodent, is described from Neogene deposits on the islands of Curac ßao and Bonaire, Dutch Antilles. The genus is characterized by strongly cuspidate molars, the presence of mesolophs in most upper molars and the absence of mesolophids in lower molars. Similarities with the early cricetid Copemys from the Miocene of North America coupled with apparent derived characters shared with the subfamily Sigmodontinae suggest that Cordimus may be close to the root of the sigmodontine lineage, a possibility that remains to be tested through explicit phylogenetic analysis. Three species are recognized on the basis of size and details of molar morphology. Cordimus hooijeri sp. nov. is described from Bonaire on the basis of Holocene owl pellet material that consists of dentaries and postcranial material only. This species is presumed to be extinct, but focused surveys are needed to confirm this hypothesis. Cordimus debuisonjei sp. nov. and Cordimus raton sp. nov. are described from deposits on Tafelberg Santa Barbara in Curac ßao. Although the age of these deposits is not known, they are most likely of late Pliocene or early Pleistocene age. Both are represented by numerous isolated molars and some osteological material.

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New genus and two new species of Pleistocene oryzomyines (Cricetidae: Sigmodontinae) from Bonaire, Netherlands Antilles

Cited by 13 publications

References 11 publications

A new species of recently extinct rice rat (Megalomys) from Barbados

A new species of recently extinct rice rat (Megalomys) from Barbados

Disentangling the Influence of Urbanization and Invasion on Endemic Geckos in Tropical Biodiversity Hot Spots: A Case Study ofPhyllodactylus martini(Squamata: Phyllodactylidae) along an Urban Gradient in Curaçao

New rodents (Cricetidae) from the Neogene of Curaçao and Bonaire, Dutch Antilles

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