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Teta, Pablo; Ortíz, Pablo E.

doi:10.3989/egeol.02583-4117

Cited by 9 publications

(4 citation statements)

References 28 publications

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“…rosiae. Likewise, other archaeological (Pearson and Pearson 1993;Teta and Ortiz 2002;Bernardis et al 2013;Fernández et al 2016;Tammone et al 2020) and paleontological (Verzi et al 2002) sites with records of living octodontid genera show that especially the cis-Andean (east of the Andes) representatives of this family are often nondominant species in their communities (see Ojeda 2010). Thus, if timetrees recovered to date are correct, early representatives of current octodontids could also have been rare species in their communities (see Vrba and DeGusta 2004) and in this case, their absence from the fossil record could be the result of taphonomic biases, including problems of geographic representation that are inherent in the archaeological and paleontological record.…”

Section: Discussionmentioning

confidence: 97%

“…The crown clade Octodontidae differentiated in southern South America during the Late Miocene, over 10 My later than the divergence of the total clade Octodontidae from their sister family Ctenomyidae (Upham and Patterson 2012, 2015; Verzi et al 2014, 2016; Álvarez et al 2017). The time-calibrated phylogenies show that crown genera were already differentiated in the Pliocene (Table 1), yet their fossil record is limited mostly to the latest Pleistocene–Holocene (Massoia et al 1981; Simonetti 1989, 1994; Pearson and Pearson 1993; Massoia and Silveira 1996; Simonetti and Saavedra 1998; Teta and Ortiz 2002; Saavedra and Simonetti 2003; Saavedra et al 2003; Udrizar Sauthier et al 2009; Fernández et al 2016; López et al 2016; Labarca et al 2020; Tammone et al 2020). As an exception, Tympanoctomys is recorded in the Early Pleistocene (Ameghino 1889; Verzi et al 2002); in addition, Ameghino (1891) reported presence of Aconaemys in the “Pampeano inferior” (Pleistocene) of Córdoba based on mandibular remains and isolated teeth—these specimens being currently missing from the paleontological MACN collection.…”

Section: Discussionmentioning

confidence: 99%

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A new extinct desert rodent from the Holocene of South America and its bearing on the diversity of Octodontidae (Hystricognathi)

Verzi,

Olivares,

De Santi

et al. 2023

Journal of Mammalogy

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A Late Holocene (ca. 3,100 to 380 BP) sample of the viscacha rat genus Octomys (Octodontidae) from the Vaquerías Gruta 1 site (VQ-G1) in western Argentina is reported. Phylogenetic and morphometric comparative analyses with living octodontids support that the VQ-G1 sample is related to the desert specialists Tympanoctomys and Octomys, and is sister to the only living species of the latter, O. mimax. The estimated morphological distance to O. mimax is greater than that between pairs of congeneric octodontid species, and even greater than that between some species belonging to different genera. This suggests that the sample represents a new species, whose young age prevents interpreting it as an anagenetic ancestor of O. mimax. If the new species is the result of cladogenesis, its absence in the current fauna represents actual extinction, which among caviomorphs is added to those of †Clyomys riograndensis, †Dicolpomys fossor, †Ctenomys viarapaensis, and †Galea tixiensis—also extinct in the Late Holocene. Thus, the VQ-G1 sample provides evidence of changes in diversity and distribution undergone by small mammals in southern South America during that time. The potential contribution of the Holocene record may be key to elucidate this issue from both an evolutionary and a conservation perspective. This requires a detailed systematic approach to determine whether the taxa under study are truly independent evolutionary units, as well as geographically broad sampling efforts to distinguish the changes affecting distribution from those producing irreversible changes in diversity.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

A new extinct desert rodent from the Holocene of South America and its bearing on the diversity of Octodontidae (Hystricognathi)

Verzi,

Olivares,

De Santi

et al. 2023

Journal of Mammalogy

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“…La ausencia de rasgos diagnósticos en el material fósil impide su asignación a alguna de las especies de Phyllotis documentadas para el noroeste argentino. Se han referido restos de Phyllotis en la mayor parte de los yacimientos de la región Ortiz y Jayat, 2007a;Teta y Ortiz, 2002;Madozzo Jaén, 2009), pero sólo unos pocos especímenes han podido ser identificados a nivel específico. Distribución y hábitat.…”

Section: Phyllotis Spunclassified

“…También son destacables aquellos trabajos que describen el registro fósil de los pequeños mamíferos en la región durante el Cuaternario. El estudio de estos conjuntos indica importantes cambios en la composición taxonómica cualitativa y cuantitativa de las comunidades durante el Pleistoceno-Holoceno y sugiere condiciones ambientales variables (e.g., Ortiz et al, 2000bOrtiz et al, , 2011Ortiz, , 2003Teta y Ortiz, 2002;Ortiz y Jayat, 2007a,b;Madozzo Jaén, 2009).…”

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Roedores y Marsupiales en Torno Al Límite Pleistoceno/Holoceno en Catamarca, Argentina: Extinciones y Evolución Ambiental

2011

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Resumen. Se estudió una asociación fósil de micromamíferos recuperada en las proximidades de Las Juntas, Catamarca, Argentina (28°06′36″S-65°53′54″O, 1562 m). Una datación radiocarbónica realizada sobre una muestra de huesos largos permitió referir el conjunto al Pleistoceno tardío (13,4-13,0 ka cal). La asociación, constituida por 12 especies, está dominada por los roedores sigmodontinos Reithrodon auritus (Fischer) y Phyllotis sp., seguidos por Akodon spegazzinii Thomas y Andinomys edax Thomas. Se destaca la presencia del caviomorfo Abrocoma cinerea Thomas y los sigmodontinos Akodon simulator Thomas y Tafimys powelli Ortiz, Pardiñas y Steppan. Thylamys sp. fue el único representante de Didelphimorphia en el agregado. La observación microscópica de huesos y dientes mostró evidencias de corrosión, indicando que la muestra fue generada por la actividad depredadora de lechuzas. El conjunto recuperado es característico de áreas abiertas de altura, constituido por una mezcla de especies de pastizales de neblina, pastizales altoandinos y algunos elementos del bosque montano superior. La mayoría de las especies registradas vive actualmente en simpatría a una altitud mayor a 2500 m en el mismo cordón montañoso, en un ambiente más frío y más seco que el actual en el área del yacimiento. Se interpreta que las condiciones ambientales durante la depositación del agregado fueron más frías y secas que en la actualidad. La extrapolación de esta información a otras áreas no es posible, debido a la extrema variación orográfica y ambiental de la región que determina la existencia de diferentes conjuntos de micromamíferos en un área geográfica relativamente pequeña.

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Mammalian Microfaunal Remains from Khonkho Wankane (Late Formative Period), Mollo Kontu (Middle Horizon Period) and Pukara de Khonkho (Late Intermediate Period) in the BolivianAltiplano

Pokines

2012

Intl J of Osteoarchaeology

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The following species, all of which are present in this region today, were identified: Akodon boliviensis (Bolivian grass mouse), Andinomys edax (Andean mouse), Auliscomys sublimis (Andean leaf-eared mouse), Cavia porcellus (guinea pig/cuy), Chinchilla chinchilla (chinchilla), Ctenomys leucodon (white-toothed tuco-tuco), Eligmodontia puerulus (Andean gerbil mouse), Galea musteloides (common yellow-toothed cavy), Lagidium viscacia (vizcacha), Neotomys ebriosus (Andean swamp rat),and Oligoryzomys destructor (destructive pygmy rice rat). Some direct human involvement with the deposition of some of the larger species (Cavia porcellus, Chinchilla chinchilla, Ctenomys leucodon and Lagidium viscacia) was noted, although C. porcellus was identified only from a single element from Mollo Kontu. Most deposition was likely due to natural in-burrow deaths and other natural attrition of these species. No significant shift in environment during the occupation of these sites was detected.

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Untitled

Cited by 9 publications

References 28 publications

A new extinct desert rodent from the Holocene of South America and its bearing on the diversity of Octodontidae (Hystricognathi)

A new extinct desert rodent from the Holocene of South America and its bearing on the diversity of Octodontidae (Hystricognathi)

Roedores y Marsupiales en Torno Al Límite Pleistoceno/Holoceno en Catamarca, Argentina: Extinciones y Evolución Ambiental

Mammalian Microfaunal Remains from Khonkho Wankane (Late Formative Period), Mollo Kontu (Middle Horizon Period) and Pukara de Khonkho (Late Intermediate Period) in the BolivianAltiplano

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