DIVERSIDAD INSOSPECHADA EN LOS ANDES DE ECUADOR: FILOGENIA DEL GRUPO “cinereus” DE Thomasomys Y DESCRIPCIÓN DE UNA NUEVA ESPECIE (RODENTIA,CRICETIDAE)

Brito, Jorge; Tinoco, Nicolás; Curay, Jenny; Vargas, Rocío; Reyes-Puig, Carolina; Romero, Víctor; Pardiñas, Ulyses F. J.

doi:10.31687/saremmn.19.26.2.0.04

Cited by 15 publications

(39 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thomasomys princeps was reported in Ecuador, from Morona Santiago, Sangay National Park (Lee et al 2015). Recently, Brito et al (2019) found that the sequence of one of those specimens (QCAZ 11939; KR818905.1 in GeneBank) identified as T. princeps formed a strong clade with other sequences of T. aureus (MECN 5662,5666) from Chimborazo, Chambo, Parque Nacional Sangay, Atillo. Brito et al (2019)'s clade of aureus-princeps could indeed represent T. aureus s.s., T. princeps, or a new taxon, but they made no taxonomic comment.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, Brito et al (2019) found that the sequence of one of those specimens (QCAZ 11939; KR818905.1 in GeneBank) identified as T. princeps formed a strong clade with other sequences of T. aureus (MECN 5662,5666) from Chimborazo, Chambo, Parque Nacional Sangay, Atillo. Brito et al (2019)'s clade of aureus-princeps could indeed represent T. aureus s.s., T. princeps, or a new taxon, but they made no taxonomic comment. Pending a thorough revision, these specimens (and sequences) from Ecuador are tentatively not recognized here as princeps because the identification was not properly sustained by comparisons with the holotype of T. princeps or topotypes from Cundinamarca.…”

Section: Discussionmentioning

confidence: 99%

“…The genus is endemic to South America in tropical and subtropical habitats along the Andes, where it is distributed from the Cordillera Santa Marta in Colombia and northern Venezuela to central Bolivia, and where it lives from about 1200 m to above 4500 m (Pacheco 2015). Currently, 45 species are recognized in the genus (Pacheco 2015;Brito et al 2019), and based on phylogenetic analysis of morphological characters, they are contained in seven intrageneric groups (Pacheco 2003(Pacheco , 2015: "aureus", "baeops", "cinereus", "gracilis", "incanus", "macrotis" , and "notatus". The Principal Oldfield Mouse, Thomasomys princeps (Thomas 1895), is a large species (total length of head and body 173-198 mm) with princeps has been reported from Sangay National Park in Morona Santiago Province, Ecuador (Lee et al 2015); however, an adequate description of external characteristics and morphological details of the skull and teeth were not provided.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Range extension of Thomasomys princeps (Thomas, 1895) (Rodentia, Sigmodontinae) and first record in Venezuela

Pacheco¹

2021

CheckList

View full text Add to dashboard Cite

Thomasomys princeps (Thomas, 1895) is a large, sigmodontine rat and a member of the “aureus” group of the highly diverse genus Thomasomys. This species is only known from the Cordillera Oriental, Colombia; however, based on a recent examination of specimens of Thomasomys from Venezuela, I report the first record of T. princeps from Venezuela, in the Páramo del Tamá near the Colombian border. This record extends the distributional range of the species by 360 km northeast, representing the northernmost record of the species and of the “aureus” group.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Range extension of Thomasomys princeps (Thomas, 1895) (Rodentia, Sigmodontinae) and first record in Venezuela

Pacheco¹

2021

CheckList

View full text Add to dashboard Cite

show abstract

“…The interest in complementing biodiversity studies has led to expeditions to little-known locations, such as the Reserva Drácula and also triggered revisions of museum specimens. These approaches have retrieved several recent additions to the Ecuadorian sigmodontine fauna (e.g., Rhagomys longilingua , see Medina et al, 2017 ; Amphinectomys savamis , see Chiquito & Percequillo, 2016 ; Nectomys saturatus , see Chiquito & Percequillo, 2019 ), and also led to the description of new biological entities (e.g., Rhipidomys albujai , see Brito et al, 2017 ; Tanyuromys thomasleei , see Timm, Pine & Hanson, 2018 ; Thomasomys salazari , see Brito et al, 2019 ; Ichthyomys pinei , see De Córdova et al, 2020 ). In this same way, recent surveys in isolated Ecuadorian mountain systems, such as Cordillera del Cóndor and Kutukú, are revealing several novel species for monotypic (e.g., Mindomys ) or speciose genera (e.g., Neacomys , Rhipidomys and Thomasomys ), which are still in the process of publication.…”

Section: Discussionmentioning

confidence: 99%

A new genus of oryzomyine rodents (Cricetidae, Sigmodontinae) with three new species from montane cloud forests, western Andean cordillera of Colombia and Ecuador

Brito

Koch

Percequillo

et al. 2020

PeerJ

Self Cite

View full text Add to dashboard Cite

The Andean cloud forests of western Colombia and Ecuador are home to several endemic mammals; members of the Oryzomyini, the largest Sigmodontinae tribe, are extensively represented in the region. However, our knowledge about this diversity is still incomplete, as evidenced by several new taxa that have been described in recent years. Extensive field work in two protected areas enclosing remnants of Chocó montane forest recovered a high diversity of small mammals. Among them, a medium-sized oryzomyine is here described as a new genus having at least three new species, two of them are named and diagnosed. Although externally similar to members of the genera Nephelomys and Tanyuromys, the new genus has a unique molar pattern within the tribe, being characterized by a noticeable degree of hypsodonty, simplification, lamination, and third molar compression. A phylogeny based on a combination of molecular markers, including nuclear and mitochondrial genes, and morphological data recovered the new genus as sister to Mindomys, and sequentially to Nephelomys. The new genus seems to be another example of a sigmodontine rodent unique to the Chocó biogeographic region. Its type species inhabits cloud forest between 1,600 and 2,300 m in northernmost Ecuador (Carchi Province); a second species is restricted to lower montane forest, 1,200 m, in northern Ecuador (Imbabura Province); a third putative species, here highlighted exclusively by molecular evidence from one immature specimen, is recorded in the montane forest of Reserva Otonga, northern Ecuador (Cotopaxi Province). Finally, the new genus is also recorded in southernmost Colombia (Nariño Department), probably represented there also by a new species. These species are spatially separated by deep river canyons through Andean forests, resulting in marked environmental discontinuities. Unfortunately, Colombian and Ecuadorian Pacific cloud forests are under rapid anthropic transformation. Although the populations of the type species are moderately abundant and occur in protected areas, the other two persist in threatened forest fragments.

show abstract

“…Rhagomys longilingua, see Medina et al 2017), but also new biological entities (e.g. Rhipidomys albujai, see Tanyuromys thomasleei, see Timm et al 2018; Thomasomys salazari, see Brito et al 2019). In addition, other taxa under study, representing new species, are soon to be published (R. Timm, pers.…”

Section: Discussionmentioning

confidence: 99%

A new species of crab-eating rat of the genus Ichthyomys, from Ecuador (Rodentia, Cricetidae, Sigmodontinae)

et al. 2019

Self Cite

View full text Add to dashboard Cite

Based on two adult specimens collected in the Río León (Azuay, Ecuador), we describe a new highland species of a small crab-eating rat of the genus Ichthyomys Thomas (Rodentia, Cricetidae, Ichthyomyini). It is distinguishable from Ichthyomys hydrobates (Winge, 1891), the species phenetically closest to it, by its smaller size, bicolored tail (unicolored in I. hydrobates), broad and heavily fringed hindfoot (narrower and moderately fringed in I. hydrobates), and several craniodental traits (e.g. rostrum short broad; nasals anteriorly truncated; interorbital region narrow; supraorbital margins smoothly rounded; supraorbital foramina small, zygomatic plate very narrow; incisors opisthodont; length of M3 half that of M2). The new species occurs in the western Andes in southern Ecuador and is allopatric with Ichthyomys stolzmanni Thomas, 1893, which also has a bicolored tail but is larger. The new species brings the number of Ecuadorean Ichthyomys to four, Ecuador thus becoming the country with the greatest diversity of Ichthyomyini (four genera and eight species).

show abstract

DIVERSIDAD INSOSPECHADA EN LOS ANDES DE ECUADOR: FILOGENIA DEL GRUPO “cinereus” DE Thomasomys Y DESCRIPCIÓN DE UNA NUEVA ESPECIE (RODENTIA,CRICETIDAE)

Cited by 15 publications

References 34 publications

Range extension of Thomasomys princeps (Thomas, 1895) (Rodentia, Sigmodontinae) and first record in Venezuela

Range extension of Thomasomys princeps (Thomas, 1895) (Rodentia, Sigmodontinae) and first record in Venezuela

A new genus of oryzomyine rodents (Cricetidae, Sigmodontinae) with three new species from montane cloud forests, western Andean cordillera of Colombia and Ecuador

A new species of crab-eating rat of the genus Ichthyomys, from Ecuador (Rodentia, Cricetidae, Sigmodontinae)

Contact Info

Product

Resources

About