Genetic divergence of insular marsh rice rats in subtropical Florida

Indorf, Jane L.; Gaines, Michael S.

doi:10.1644/12-mamm-a-124.1

Cited by 10 publications

(5 citation statements)

References 26 publications

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“…Interest in the genetics of Oryzomys palustris populations led to the recent elevation of Oryzomys palustris texensis to species status (Hanson et al 2010) and to further genetic studies of island populations to learn the degree of genetic isolation of island subspecies (such as planirostris and sanabeli ) from those on the mainland of Florida (Indorf and Gaines 2013) and to evaluate gene flow among O. palustris on islands and mainland in Virginia (Forys and Moncrief 1994). Genetic studies of five island and four mainland populations on the Virginia coastline revealed that only 13.5% ( F ST = 0.135) of total variance in allelic frequencies was due to genetic differences among samples (Loxterman et al 1998).…”

Section: Geneticsmentioning

confidence: 99%

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Oryzomys palustris (Rodentia: Cricetidae)

Rose

2023

Mammalian Species

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Oryzomys palustris (Harlan, 1837), the common marsh rice rat, is an Oryzomyine rodent with a tail nearly as long as the head and body, grayish above and white below with long-toed white feet. This account is an update of Mammalian Species 176 on the subject species by James L. Wolfe (1982a), incorporating 103 new references, most published since 1982. Oryzomys palustris, one of six living and two extinct species in this Neotropical genus, is semiaquatic and omnivorous, being highly carnivorous in some populations. It is parapatric with O. texensis in the western portion of its distribution in the southern United States. Oryzomys palustris is classified as “Least Concern” (LC) on the International Union for Conservation of Nature Red List.

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Section: Geneticsmentioning

confidence: 99%

“…Indorf and Gaines (2013) found individuals from Monroe County (Florida Lower Keys), originally named O. argentatus , the silver rice rat (Spitzer and Lazell 1978), to be monophyletic, as was O. p. sanibeli , whereas O. planirostris was not. Patton (2017) considered argentatus to be part of coloratus and O. palustris to have five subspecies.…”

Section: Geneticsmentioning

confidence: 99%

Oryzomys palustris (Rodentia: Cricetidae)

Rose

2023

Mammalian Species

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“…If H. melanotis has historically been on Cocinas, then a divergence of the insular population of H. melanotis from mainland counterparts is very plausible, as insular rodent populations present high rates of microevolution (Pergams and Ashley 2001). This has been documented for other rodent species that contribute to the regional biodiversity (Millien 2006;Amori et al 2008;Anadón-Irizarry et al 2012;Indorf and Gaines 2013;Rowe et al 2019). Morphological and genetic research looking for divergence of the Cochinas Island and mainland populations of H. melanotis is needed.…”

Section: )mentioning

confidence: 99%

First record of Black-eared Rice Rat, Handleyomys melanotis (Thomas, 1893) (Rodentia, Cricetidae), on a protected island off the Pacific Coast of Jalisco, Mexico, with notes on its potential threat for avian nesting species

Siliceo-Cantero¹,

Benítez‐Malvido²,

Suazo‐Ortuño³

et al. 2022

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Black-eared Rice Rat, Handleyomys melanotis (Thomas, 1893), is a small, abundant rodent thought endemic to Mexico. We present a new record of this rat on Cocinas Island off the Chamela coast of Jalisco, Mexico. On this protected island located at 19.5°N, 105.1°W, we captured 11 specimens with the physical characteristics that confirm their identity as H. melanotis. We explore the possible implications of this species on Cocinas Island. 

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“…Oryzomys, after being redefined, has also undergone recent taxonomic changes, including the placement of taxonomic forms that were previously considered subspecies at the species level (Carleton and Arroyo-Cabrales 2009;Hanson et al 2010;Indorf and Gaines 2013). Since of the revision of Musser and Carleton (2005), four species were recognized within the genus (O. couesi, O. dimidiatus, O. gorgasi, and O. palustris), later an ancient species from the island of Jamaica, O. antillarum, was confirmed (Morgan 1993;McFarlane et al 2002;Weksler et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, Hanson et al (2010) conducted a molecular phylogenetic analysis of the genus in Central America and North America, leading to the separation of O. texensis and O. mexicanus. The taxonomic situation of O. argentatus is also complex and widely discussed, but current evidence indicates that it is a distinct species facing serious conservation problems (Goodyear 1991;Wang et al 2005;Indorf and Gaines 2013). Actually, at least 11 species of the genus Oryzomys are known, with two additional species, one from Panama and other from Costa Rica, pending formal descriptions (Hanson et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Rediscovery of Oryzomys fulgens: implications for the taxonomy of Oryzomys

González-Ruiz,

Ramírez-Pulido,

Jiménez-Gutiérrez

et al. 2024

Therya

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The rodents belonging to the genus Oryzomys are among the most widely distributed groups inhabiting North America. Currently, 13 species with continental, peninsular, or insular distributions are known. However, this genus also faces significant conservation challenges, primarily due to climate change and other human-related activities. One such enigmatic species is Oryzomys fulgens. Its main challenge lies in the fact that it was originally described from an imprecise type locality, simply labeled as "Mexico." Fortunately, recent research has delimited its range to the Basin of México. Nonetheless, the lack of comparison between its holotype and other specimens of the genus in México has hindered the accurate assignment of its name to any known taxon, despite being one of the oldest names within the genus, O. fulgens has rarely been used since its original description. During our research, we collected two specimens of O. fulgens from Xochimilco, México City, a remnant wetland situated within the Basin of México, nestled within one of the largest and most urbanized cities globally. To properly assess its taxonomic status, we compared our specimens with the holotype of O. fulgens, as well as with other species from southern and western México. The considerable morphological differences we observed in O. fulgens, coupled with its distinct and unique habitat as the sole species of the genus occupying temperate regions at high elevations, lead us to propose that it is indeed a distinct species, separate from O. mexicanus and O. albiventer. Historically, its distribution was likely limited to the Basin of México. Today, O. fulgens faces serious conservation problems, mainly due to the restriction of its current distribution, as far as we know, confined to Xochimilco. Although the ancestral agricultural system known as "chinampas" might provide an ideal environment for sustaining populations of this species, it remains under significant pressure from various human activities, predators, and competition with invasive species like the black rat. Urgent conservation efforts are needed to safeguard the unique habitat of O. fulgens and protect this enigmatic species from further decline.

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Genetic divergence of insular marsh rice rats in subtropical Florida

Cited by 10 publications

References 26 publications

Oryzomys palustris (Rodentia: Cricetidae)

Oryzomys palustris (Rodentia: Cricetidae)

First record of Black-eared Rice Rat, Handleyomys melanotis (Thomas, 1893) (Rodentia, Cricetidae), on a protected island off the Pacific Coast of Jalisco, Mexico, with notes on its potential threat for avian nesting species

Rediscovery of Oryzomys fulgens: implications for the taxonomy of Oryzomys

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