scholarly journals First report of Devonian bactritids (Cephalopoda) from South America: paleobiogeographic and biostratigraphic implications

2017 ◽  
Vol 91 (3) ◽  
pp. 417-433 ◽  
Author(s):  
Marcela Cichowolski ◽  
Juan J. Rustán
Keyword(s):  
South America ◽  
Wide Distribution ◽  
First Report ◽  
Virtual Absence ◽  
Central Argentina ◽  
West Central ◽  
Siliciclastic Rocks ◽  
Taxonomic Groups ◽  
First Time

AbstractDevonian bactritids are described for the first time from South America. They come from siliciclastic rocks of the Talacasto Formation in the Precordillera Basin, west-central Argentina. The host strata span the Lochkovian–Emsian and contain other non-ammonoid cephalopods as well, thus refuting the alleged virtual absence of cephalopods in circumpolar Devonian basins from southwestern Gondwana (the Malvinokaffric Realm). We reportBactrites gracilisandDevonobactrites? sp., whose wide distribution contrasts with the endemic paleobiogeographic signature of some other taxonomic groups in these basins. Furthermore, new Lochkovian and Pragian records ofBactritessp. provide new insights into the earliest bactritid records worldwide.

Description of Almafuerte, a new genus of ground spiders from South America (Araneae, Gnaphosidae)

Zootaxa ◽  
2017 ◽  
Vol 4338 (2) ◽  
pp. 263 ◽  
Author(s):  
CRISTIAN J. GRISMADO ◽  
NICOLÁS LÓPEZ CARRIÓN
Keyword(s):  
South America ◽  
New Taxa ◽  
Type Species ◽  
New Genus ◽  
Santa Fe ◽  
Southern South America ◽  
Central Argentina ◽  
First Time

A new genus of gnaphosid spiders, Almafuerte, gen. nov., is described for seven species from Southern South America. The new genus is diagnosed by a conspicuous retrolateral tegular projection on the male palp, and by having three teeth on the cheliceral retromargin. It comprises six species from Argentina, A. peripampasica sp. nov. (type species), from Central Argentina, also present in Uruguay, A. kuru sp. nov., from Santiago del Estero, A. vigorosa sp. nov., from Corrientes, A. goloboffi sp. nov., from Salta and Jujuy, A. remota sp. nov., from Santiago del Estero and Mendoza, and A. giaii (Gerschman & Schiapelli) comb. nov., here transferred from Echemus, from Santa Fe (the female is here described by the first time); and one species from Bolivia, A. facon sp. nov., from Cochabamba. Hypotheses of relationships of the new taxa are briefly discussed, in the context of the previously proposed groupings: the subfamilies Echeminae and Drassodinae (sensu Platnick 1990) and the “Echemus group” (sensu Murphy 2007). 

scholarly journals PRIMER REPORTE DE LA FAMILIA CHEIRIDIIDAE (ARACHNIDA: PSEUDOSCORPIONIDA) EN COLOMBIA

2015 ◽  
Vol 20 (3) ◽  
pp. 217-220 ◽  
Author(s):  
Jorge Alexander QUIROZ-RODRÍGUEZ ◽  
Edwin BEDOYA ROQUEME ◽  
Robin BEDOYA COCHETT
Keyword(s):  
South America ◽  
Distribution Range ◽  
First Report ◽  
The Family ◽  
Arthropod Fauna ◽  
Atta Colombica ◽  
First Time

<p>Durante un estudio de la fauna de artrópodos asociada a montículos de detritos de hormigas de la especie <em>Atta colombica</em> Guérin-Méneville, 1844<em> </em>(Hymenoptera: Formicidae) en la hacienda Santa Isabel, corregimiento de Patio Bonito en el departamento de Córdoba, se encontraron representantes de la familia Cheiridiidae. Por tanto, estos pseudoescorpiones se convierten en el primer reporte de la familia para Colombia y por primera vez se registra su presencia en detritus de hormigas. Así mismo, este reporte, amplía su distribución conocida para Suramérica.</p><p><strong>First Report of Family Cheiridiidae (Arachnida: Pseudoscorpionida) in Colombia</strong></p><p>During a study of the arthropod fauna associated with mounds of detritus produced by <em>Atta colombica</em> (Hymenoptera: Formicidae) in the Santa Isabel estate, locality of Patio Bonito, Department of Córdoba, were found representatives of the family Cheiridiidae. Therefore, these pseudoscorpions becomes in the first report of the family to Colombia and for the first time is recorded its presence in ant detritus. Also, this report extends its known distribution range in South America.   </p>

scholarly journals UNA virus: first report of human infection in Argentina

2003 ◽  
Vol 45 (2) ◽  
pp. 109-110 ◽  
Author(s):  
Luis Adrián Diaz ◽  
Lorena Ivana Spinsanti ◽  
Walter Ricardo Almiron ◽  
Marta Silvia Contigiani
Keyword(s):  
South America ◽  
Rural Areas ◽  
Neutralizing Antibodies ◽  
Neutralization Test ◽  
Human Infection ◽  
First Report ◽  
Central Argentina ◽  
Human Sera ◽  
Vertebrate Hosts ◽  
Human Infections

Una virus (UNAV), Togaviridae family, is widely distributed in South America, where infections have been detected in mosquitoes and vertebrate hosts (humans, birds and horses). We analyzed human sera from Córdoba inhabitants aged 44 to 89 years and using a neutralization test, we found a prevalence of UNAV antibodies of 3.8% (3/79). The low titers detected suggest past infections probably acquired in rural areas of the Province of Córdoba (central Argentina). None sera were found positive for MAYV neutralizing antibodies. This is the first report of human infections by UNAV in Argentina.

Middle Ordovician (Darriwilian) linguliform and craniiform brachiopods from the Precordillera (Cuyania Terrane) of west-central Argentina

2016 ◽  
Vol 90 (6) ◽  
pp. 1068-1080 ◽  
Author(s):  
Fernando J. Lavié ◽  
Juan L. Benedetto
Keyword(s):  
Conical Shell ◽  
San Juan ◽  
Middle Ordovician ◽  
Central Argentina ◽  
West Central ◽  
First Time

AbstractMiddle Ordovician lingulacean, trematid, and craniid brachiopods are described and illustrated for the first time from the uppermost part of San Juan Formation limestones of the Precordillera Basin, west-central Argentina. Sampled beds fall within theAhtiella argentinabrachiopod Zone, which, according to associated conodonts, is of early-mid Darriwilian age. The fauna consists of the linguloideansGlossella cuyanican. sp. andLingulasma? sp., the discinoideanTrematissp., the siphonotretidChilcatreta tubulatan. gen. n. sp., and a conical shell that is referred provisionally to the order Craniida. The linguliforms from the Cuyania (Precordillera) terrane, although still poorly known, display close similarities to those inhabiting low-to-intermediate latitude palaeocontinents, particularly Laurentia and Baltica, in accordance with evidence from rhynchonelliform brachiopods.

scholarly journals Echinodermata, Ophiuroidea, Gorgonocephalus Leach, 1815: first report of the genus for the Brazilian continental margin

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 289 ◽  
Author(s):  
Carlos A. M. Barboza ◽  
Fabricio M. Mendes ◽  
Andrea Dalben ◽  
Luiz R. Tommasi
Keyword(s):  
South America ◽  
Continental Margin ◽  
Wide Distribution ◽  
Large Temperature ◽  
Northern Limit ◽  
Santa Catarina ◽  
Southern South America ◽  
First Report ◽  
First Occurrence

The Gorgonocephalidae includes 38 genera, five of them reported for Brazilian waters. Gorgonocephalus chilensis has a wide distribution throughout Antartica and Subantartican regions and its northern limit was restricted to the coast of Uruguay. This work aims to report the first occurrence of the Gorgonocephalus genus for the Brazilian continental margin and extend the northern limit of distribution of G. chilensis to the coast of Santa Catarina. Tolerance to a large temperature and bathimetric range are crucial to understand the distributions patterns of ophiuroids from the polar circle that also occur at southern South America.

scholarly journals Geographic variation in quantitative skull traits and systematic of southern populations of the leaf-eared mice of the Phyllotis xanthopygus complex (Cricetidae, Phyllotini) in southern South America

Zootaxa ◽  
2018 ◽  
Vol 4446 (1) ◽  
pp. 68
Author(s):  
PABLO TETA ◽  
J. PABLO JAYAT ◽  
CECILIA LANZONE ◽  
AGUSTINA OJEDA
Keyword(s):  
South America ◽  
Molecular Data ◽  
Valid Species ◽  
Skull Morphology ◽  
North Central ◽  
Southern South America ◽  
Central Argentina ◽  
The North ◽  
West Central ◽  
Neotropical Rodents

The leaf-eared mice of the genus Phyllotis (Cricetidae, Phyllotini) encompasses at least 20 species of medium-sized Neotropical rodents mostly distributed throughout the Andean region. Its limits and contents were reviewed by several authors, based both on morphological and molecular data. However, no integrative approaches were conducted based on large samples of individuals with a wide geographical coverage. The purposes of this paper are: (i) to evaluate species limits; and (ii) to test the congruence between molecular and quantitative morphological evidences within the Phyllotis xanthopygus complex in southern South America. Our results questioned the specific status of P. bonariensis, a geographically isolated form that was either considered as a valid species or as a synonym of P. xanthopygus. Quantitative morphological (size and shape of the skull) and molecular data linked P. bonariensis with populations from central Argentina traditionally referred as P. xanthopygus vaccarum. Individuals belonging to populations from southern Argentina and Chile (P. x. xanthopygus) were remarkably homogeneous in their skull morphology, showing a subtle to non-existent differentiation from those of north-central and west-central Argentina referred to P. x. vaccarum. We found some incongruence between groups inferred from morphological (this work) and mitochondrial DNA results of previous studies. This is the case of the north-central and west-central populations, where morphological traits do not show the strong differentiation detected by molecular characters. Our results highlight the need for integrative taxonomic studies, not only to delimitate taxonomic units but also for a better and more comprehensive understanding of population variability and differentiation. 

scholarly journals The first register of the weed fern Pteris cretica var. laeta (Pteridaceae) in central Argentina

Lilloa ◽  
2020 ◽  
pp. 99-109
Author(s):  
Marcelo Daniel Arana ◽  
Evangelina Natale ◽  
Gonzalo Martínez ◽  
Antonia J. Oggero
Keyword(s):  
South America ◽  
Central America ◽  
Buenos Aires ◽  
First Record ◽  
The Novel ◽  
Biogeographic Province ◽  
Central Argentina ◽  
Pteris Cretica ◽  
Novel Habitat ◽  
First Time

Pteris cretica L. var. laeta is recorded for the first time in the Comechingones biogeographic province in central Argentina. This is the first record of P. cretica in central Argentina, and P. cretica var. laeta for the country. Until now Pteris cretica has only been known to occur, in America, in North America (Florida), Central America and South America in Neotropical biomes from Peru, Chile, Brazil, Paraguay, Uruguay and northern Argentina as established in the Yungas biogeographic province, and as ruderal in Buenos Aires. An updated description is provided, along with pictures, differences with P. cretica var. cretica, and characteristic of the novel habitat of the species.

scholarly journals Mollusca, Gastropoda, Heterobranchia, Ancylidae, Gundlachia radiata (Guilding, 1828): first record of occurrence for the northwestern region of Argentina

Check List ◽  
2011 ◽  
Vol 7 (3) ◽  
pp. 263 ◽  
Author(s):  
Ximena Maria Constanza Ovando ◽  
Luiz Eduardo Macedo de Lacerda ◽  
Sonia Barbosa dos Santos
Keyword(s):  
Species Richness ◽  
South America ◽  
First Record ◽  
Water Bodies ◽  
First Report ◽  
Distributional Range ◽  
Temporary Water Bodies ◽  
Temporary Water ◽  
Northwestern Region ◽  
First Time

In the present paper we report for the first time the presence of Gundlachia radiata (Guilding, 1828), in northwestern region (Jujuy province), Argentina. Adult and juveniles specimens of this freshwater limpet were collected in two temporary water bodies. This record represents the first report of this species in Argentina but also is the southernmost point of occurrence of G. radiata in South America. As a result, the distributional range of this species is increased and the species richness of Ancylidae in Argentina is incremented to a total of seven species classified in four genera.

scholarly journals New association between the mite Erythraeus sp. (Acari: Prostigmata: Parasitengona) and the psyllid Russelliana adunca (Hemiptera: Psylloidea)

2021 ◽  
Vol 80 (04) ◽  
pp. 149-152
Author(s):  
Carla BALIOTTE ◽  
Daniel A. AQUINO ◽  
Gimena DELLAPÉ ◽  
M. Fernanda LÓPEZ ARMENGOL ◽  
Cecilia GITTINS ◽  
...  
Keyword(s):  
South America ◽  
Host Association ◽  
New Host ◽  
First Report ◽  
New Association ◽  
First Time

The association between the ectoparasitic mite, Erythraeus Latreille (Acari: Prostigmata: Parasitengona) and the psyllid Russelliana adunca Burckhardt (Hemiptera: Psylloidea) is reported for the first time. Larval erythraeid mites are not common on psyllids, therefore this first report adds a new host association and widens the distribution of the mite in South America.

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