scholarly journals Squamata, Scincidae, Mabuya dorsivittata (Cope, 1862): distribution extension in Buenos Aires province, Argentina

Check List ◽  
2011 ◽  
Vol 7 (3) ◽  
pp. 388 ◽  
Author(s):  
Jorge Williams ◽  
Federico Kacoliris
Keyword(s):  
South America ◽  
Buenos Aires ◽  
New Records ◽  
Wide Distribution ◽  
Buenos Aires Province ◽  
Previous Record ◽  
Northern Sector

Mabuya dorsivttata is a lizard with a wide distribution in South America. In Buenos Aires province, Argentina, previous voucher records exist only from its northern sector and from Mar del Plata city. In this work, two new records of M. dorsivittata from Buenos Aires province are presented: (1) Azul city (36°46’50” S, 50°51’10” W) and (2) Mar del Tuyú city (37°20’08” S, 59°07’60” W). These new records are located about 175 km from the nearest previous record. 

scholarly journals Ischnura ultima Ris, 1908 (Odonata: Coenagrionidae): new records from southern South America

Check List ◽  
2014 ◽  
Vol 10 (1) ◽  
pp. 187
Author(s):  
Javier Muzón ◽  
Alejandro Del Palacio ◽  
Lía Ramos
Keyword(s):  
South America ◽  
Buenos Aires ◽  
New Records ◽  
Buenos Aires Province ◽  
Southern South America ◽  
Endemic Areas ◽  
First Time

Ischnura ultima Ris, 1908 is recorded for the first time from Buenos Aires Province, Argentina, 750 km southeast from the southernmost previous known localities (Córdoba Province). This finding supports a stronger biogeographical relationship between the southern hills of Buenos Aires (surrounded by the Pampas lowlands) and the Monte province. In addition, this record supports the odonate endemic areas scheme previously proposed for Argentina.

scholarly journals The ghost of climatic change in the geographic distribution of Tillandsia aeranthos (Bromeliaceae)

Rodriguésia ◽  
2020 ◽  
Vol 71 ◽  
Author(s):  
Elián Leandro Guerrero
Keyword(s):  
South America ◽  
Climatic Change ◽  
Geographic Distribution ◽  
Buenos Aires ◽  
New Records ◽  
Southern Limit ◽  
New Findings ◽  
Southward Shift ◽  
Possible Cause ◽  
Color Variants

Abstract The geographic distribution of Tillandsia aeranthos is updated with new records. Its southern limit is extended 200 kilometers in a zone previously studied by many botanists and naturalists, but also in poorly explored areas. For this reason, the possibility that the change in distribution is recent is postulated and discussed. The coincidence of this change with the southward shift in the isohyets and the decrease of winter frost frequency are highlighted as a possible cause of the advance to the south. In addition, two petal color variants of this species are first mentioned for Argentina. The new findings display that it is necessary to further explore some dry forests of eastern Buenos Aires and study the possible consequences of the climatic change in the biota of South America.

New records of Hippidion principale and Equus neogeus from Salado River (Buenos Aires Province, Argentina)

2018 ◽  
Vol 289 (2) ◽  
pp. 123-138
Author(s):  
José L. Prado ◽  
María T. Alberdi ◽  
Ricardo Bonini ◽  
Héctor Crispiani
Keyword(s):  
Buenos Aires ◽  
New Records ◽  
Buenos Aires Province ◽  
Salado River

scholarly journals The 4300-yr 14C Age of Glyptodonts at Luján River (Mercedes, Buenos Aires, Argentina) and Comments on ‘Did the Megafauna Range to 4300 BP in South America’ by Cione et al.

Radiocarbon ◽  
2001 ◽  
Vol 43 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Eduardo A Rossello ◽  
Bor-ming Jahn ◽  
Tsung-Kwei Liu ◽  
Jorge L Petrocelli
Keyword(s):  
South America ◽  
Buenos Aires ◽  
Buenos Aires Province ◽  
Hunter Gatherers ◽  
14C Age ◽  
Precise Time

The glyptodont (Glyptodontidae Burmeister 1879, in Ameghino 1889), a giant cousin of the armadillo, has long been thought to have disappeared in South America at least 10,000 years ago at the end of the Pleistocene. There are indications that the glyptodont had some interaction with ancient hunter-gatherers peoples (Politis et al. 1987; Politis 1995), but the precise time of its extinction has never been well established. Most recently, a brief mention of 14C dates of 7500 to 6500 BP (Geotimes 1996) for glyptodont remains discovered at La Moderna (Azul Department, Buenos Aires province, Argentina), has aroused excitement because the new younger dates have changed the traditional idea about the survival and extinction of this beast.

Chronostratigraphy and “Land-Mammal Ages” in the Cenozoic of southern South America: principles, practices, and the “Uquian” problem

1995 ◽  
Vol 69 (1) ◽  
pp. 135-159 ◽  
Author(s):  
Alberto L. Cione ◽  
Eduardo P. Tonni
Keyword(s):  
South America ◽  
Buenos Aires ◽  
New South ◽  
Lower Boundary ◽  
Buenos Aires Province ◽  
South American ◽  
Southern South America ◽  
Matuyama Chron ◽  
Study Case ◽  
Land Mammal

The concept of “land-mammal age” as developed in South America is examined. The “Uquian Land-mammal age” is used as a study case. “Land-mammal age” parataxonomy is here considered methodologically but not conceptually different from chronostratigraphic taxonomy. “Land-mammal ages” in South America are based on stages. However, we consider that accurate biostratigraphic studies must be done in South America for establishing the biostratigraphy and precise boundary stratotypes of most stages-ages. The Uquia outcrops are here considered inadequate as a stratotype. A new South American continental stage-age is proposed. This stage is based on a biostratigraphic scheme. The stratotypes of the stage and biozones are located in the fossiliferous southeastern Buenos Aires Province marine cliffs. The lower boundary stratotype is proposed. The stage-age is probably correlated with the Gauss Chron and the lower Matuyama Chron. Additionally, some major units of Ameghino are validated and a different timing for the arrival of North American mammals to southern South America is presented.

scholarly journals Lobizon and Navira, two new genera of wolf spiders from Argentina (Araneae: Lycosidae)

Zootaxa ◽  
2009 ◽  
Vol 2195 (1) ◽  
pp. 1-33 ◽  
Author(s):  
LUIS N. PIACENTINI ◽  
CRISTIAN J. GRISMADO
Keyword(s):  
Type Species ◽  
Buenos Aires ◽  
Wide Distribution ◽  
Buenos Aires Province ◽  
New Genera ◽  
Wolf Spiders ◽  
Northwestern Argentina ◽  
San Luis ◽  
The Family ◽  
Two New Species

Two new genera in the family Lycosidae Sundevall, 1833 from Argentina are proposed. Lobizon gen. nov. comprises five species: Lobizon corondaensis (Mello-Leitão, 1941) comb. nov. (type species), L. minor (Mello Leitão, 1941) comb. nov., and L. humilis (Mello-Leitão, 1944) comb. nov., all these with a wide distribution in Argentina, and two new species: L. ojangureni sp. nov. from the montane forests of Northwestern Argentina, and L. otamendi sp. nov. from the northeastern Buenos Aires Province. The monotypic Navira gen. nov. is erected for N. naguan sp. nov. from Córdoba and San Luis Provinces. Trochosippa anomala (Mello-Leitão, 1945) and Alopecosa unguiculata Mello-Leitão, 1944 are considered junior synonyms of L. corondaensis and L. humilis respectively. A putative synapomorphy uniting the two genera is the massive, greatly elongated terminal apophysis which is grooved along its length. The subfamily placement of the two new genera is briefly discussed, and it is concluded that they probably belong to the Artoriinae Framenau, 2007 or Venoniinae Lehtinen & Hippa, 1979.

scholarly journals Did the Megafauna Range to 4300 BP in South America?

Radiocarbon ◽  
2001 ◽  
Vol 43 (1) ◽  
pp. 69-75 ◽  
Author(s):  
Alberto L Cione ◽  
Aníbal J Figini ◽  
Eduardo P Tonni
Keyword(s):  
South America ◽  
Buenos Aires ◽  
Bone Sample ◽  
Collagen Content ◽  
Buenos Aires Province ◽  
Radiocarbon Dates ◽  
Fossil Remains ◽  
The Poor ◽  
Bone Preservation ◽  
The City

A date of 4300 ± 90 BP for extinct megafauna in Argentina is discussed. The fossil remains come from the Guerrero Member (area) of the Luján Formation near the city of Luján, Buenos Aires Province. The age of the top of the Guerrero Member is constrained by more than 60 radiocarbon dates obtained from the overlying Río Salado Member of Luján Formation, Las Escobas Formation, and Puesto Callejón Viejo Soil, most of them older than 4300 BP. In view of its low collagen content, the 14C measurement of bone sample from Luján should not be accepted uncritically. Because of the poor bone preservation and the possible introduction of “young” contaminants that were not completely eliminated, the 14C date of 4300 ± 90 BP is not reliable. Both biostratigraphic and 14C dating evidence indicates that the date of 4300 BP for the last representative of extinct megafauna in South America is unsupported.

scholarly journals Fossil horses from the Late Pleistocene of Tapalqué Creek (Buenos Aires Province, Argentina)

2019 ◽  
Vol 294 (3) ◽  
pp. 285-305
Author(s):  
José L. Prado ◽  
Ricardo Bonini ◽  
Cristian Favier-Dubois ◽  
Gustavo N. Gómez ◽  
Pamela Steffan ◽  
...  
Keyword(s):  
South America ◽  
Buenos Aires ◽  
Buenos Aires Province ◽  
South American ◽  
Fluvial Deposits ◽  
Sedimentary Deposits ◽  
Diagenetic Processes ◽  
Taphonomic Analysis ◽  
Land Mammal ◽  
New Evidence

A comparative study was made with the known record of equids species in South America, identifying the remains as Equus neogeus, Hippidion devillei, and Hippidion principale. These data increase the record of Equidae in South America and provide new evidence about the chronological and geographical distribution. The sedimentary deposits of the Lujan Formation outcropping at Tapalqué creek (4 to 120 ky) were accumulated through fluvial processes. This Formation comprises a rich vertebrate fauna corresponding to the Lujanian South American Land Mammal Age, which includes numerous and diverse vertebrate remains. The taphonomic analysis indicates that the faunistic assemblage was formed and was subject to diagenetic processes without distinction of its action in the fossiliferous levels, that can be recognized as fluvial deposits.

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