scholarly journals First report of Duchesnea indica f. albocaput (Rosaceae) in Northwestern Argentina.

2018 ◽  
Vol 53 (1) ◽  
pp. 83-91
Author(s):  
Mario A. Debes ◽  
Ingrid G. Orce ◽  
Ana C. Luque ◽  
Ana C. Luque ◽  
Juan C. Díaz-Ricci ◽  
...  
Keyword(s):  
South America ◽  
Crystal Form ◽  
Fruit Color ◽  
Ex Situ ◽  
Northwestern Argentina ◽  
Green House ◽  
Disturbed Areas ◽  
Wild Strawberry ◽  
Anatomical Characters ◽  
First Time

: The genus Duchesnea includes two species originally from India: D. indica and D. chrysantha. In Northwestern Argentina the monitoring of wild strawberry-like species was carried out; during 2002- 2016, many populations of D. indica and none of D. chrysantha were discovered. Red- and white-fruited plants of D. indica were collected from disturbed areas and ex situ conserved in green-house and in nursery conditions. Were also consulted materials from different national and international herbaria, and we only found reports of D. indica with red fruit for Argentina. In the present work, we report for the first time the presence of D. indica f. albocaput in Argentina and South America, cohabiting with populations of D. indica f. indica in the underwoods of Tucumán. This finding broadens the distribution range of D. indica f. albocaput, cited as endemic to Japan by Naruhashi 1992. The morphological and anatomical characters of the two botanical forms of D. indica (red fruit genotypes and white fruit genotypes) are also presented: fruit color, number of leaflets, and crystal form

Paralonchothrix gen. nov., the first record of Echimyini (Rodentia, Octodontoidea) in the late Miocene of Southern South America

2021 ◽  
pp. 1-12
Author(s):  
Pedro PIÑERO ◽  
A. Itatí OLIVARES ◽  
Diego H. VERZI ◽  
Victor H. CONTRERAS
Keyword(s):  
South America ◽  
Late Miocene ◽  
New Genus ◽  
Sister Group ◽  
First Record ◽  
Northwestern Argentina ◽  
Southern South America ◽  
Evolutionary Pattern ◽  
Minimum Age ◽  
First Time

ABSTRACT Echimyidae is the most widely diversified family among hystricognath rodents, both in the number of species and variety of lifestyles. In the Patagonian Subregion of southern South America, extinct echimyids related to living arboreal species (Echimyini) are recorded up to the middle Miocene, whereas all the known southern fossils since the late Miocene are linked to terrestrial and fossorial lineages currently inhabiting the Chacoan open biome in eastern South America. In this work, we describe a new genus of echimyid rodent, Paralonchothrix gen. nov., from the late Miocene of northwestern Argentina and western Brazil. Its single recognised species, Paralonchothrix ponderosus comb. nov., is represented by two hemimandibles. One of them comes from a level of Loma de Las Tapias Formation, underlying a tuff dated at 7.0 ± 0.9 Ma (Huayquerian age, late Miocene); the other specimen comes from the ‘Araucanense’ of Valle de Santa María (type locality, Huayquerian age, late Miocene). A phylogenetic analysis linked Paralonchothrix to Lonchothrix, both being the sister group to Mesomys. Thereby, for the first time, an echimyid linked to living Amazonian arboreal clades is recognised for the late Miocene of southern South America. Paralonchothrix gen. nov. thus represents an exceptional record that raises the need to review the postulated evolutionary pattern for echimyids recorded at high latitudes since the late Miocene. The new genus provides a minimum age (ca.7 Ma) in the fossil record for the divergence between Mesomys and Lonchothrix. The palaeoenvironmental conditions inferred for the late Miocene in western and northwestern Argentina suggest savanna-type environments, with areas with more closed woodlands in peri-Andean valleys. The record of Paralonchothrix gen. nov. supports the hypothesis that this area would have maintained connections with tropical biomes of northern South America during the late Miocene.

scholarly journals First record of Ehrharta longiflora Sm. (Poaceae, Ehrharteae) for South America

Check List ◽  
2018 ◽  
Vol 14 (2) ◽  
pp. 475-478
Author(s):  
Joel Calvo ◽  
Andrés Moreira-Muñoz
Keyword(s):  
South America ◽  
New Record ◽  
First Record ◽  
Central Chile ◽  
Disturbed Areas ◽  
African Grass ◽  
Location Map ◽  
First Time

Ehrharta longiflora Sm. (Poaceae) is recorded for the first time in South America. A few naturalized populations were located in disturbed areas of Valparaíso (Central Chile). A brief taxonomic discussion, images and a location map of the new record of this African grass are provided here.

scholarly journals Three new mosses records from the Andes of northwestern Argentina.

2017 ◽  
Vol 52 (2) ◽  
pp. 261-263 ◽  
Author(s):  
María J. Cano ◽  
Marta Alonso
Keyword(s):  
North America ◽  
South America ◽  
North Africa ◽  
Northwestern Argentina ◽  
The Andes ◽  
First Time

Two mosses are newly reported for Argentina based on recent collections from Saltaprovince: Aligrimmia peruviana R.S. Williams and Conostomum cleistocarpum Herzog. Hitherto, they were considered endemic to Bolivia and Peru, respectively. In addition, Crossidium squamiferum (Viv.) Jur., a species distributed in Europe, North America, Mexico, Asia, North Africa, and Macaronesia, is here reported for the first time in South America.

Effects of insecticides on adults and eggs of Drosophila suzukii (Diptera, Drosophilidae)

2017 ◽  
Vol 43 (2) ◽  
pp. 208 ◽  
Author(s):  
Daniele Cristine Hoffmann Schlesener ◽  
Jutiane Wollmann ◽  
Juliano De Bastos Pazini ◽  
Anderson Dionei Grützmacher ◽  
Flávio Roberto Mello Garcia
Keyword(s):  
North America ◽  
South America ◽  
Chemical Control ◽  
Stone Fruits ◽  
Drosophila Suzukii ◽  
Ovicidal Effect ◽  
Mere Presence ◽  
South Of Brazil ◽  
Different Cultures ◽  
First Time

Drosophila suzukii (Diptera, Drosophilidae) is an exotic species, endemic to Asia and currently a pest to small and stone fruits in several countries of North America and Europe. It was detected in 2013 for the first time in South America, in the south of Brazil. Unlike most drosophilids, this species deserves special attention, because the females are capable of oviposit inside healthy fruits, rendering their sale and export prohibited. Despite the confirmed existence of this species in different states of Brazil, this insect is yet been to be given the pest status. Nevertheless, the mere presence of this species is enough to cause concern to producers of small fruits and to justify further investigation for it’s control, especially chemical control for a possible change in status. Therefore, the goal of this work was to evaluate, in laboratory, mortality of D. suzukii adults and ovicidal effect when exposed to different insecticides registered for species of the Tephritidae and Agromyzidae families in different cultures. The insecticides deltamethrin, dimethoate, spinosad, fenitrothion, phosmet, malathion, methidathion, and zeta-cypermethrin resulted in mortality to 100 % of the subjects three days after the treatment (DAT). Regarding the effects over eggs, it was  established that the insecticides fenitrothion, malathion, and methidathion deemed 100 % of the eggs not viable, followed by phosmet and diflubenzuron, which also caused elevated reduction in the eclosion of larvae two DAT.

scholarly journals Single-crystalline epitaxial TiO film: A metal and superconductor, similar to Ti metal

2021 ◽  
Vol 7 (2) ◽  
pp. eabd4248
Author(s):  
Fengmiao Li ◽  
Yuting Zou ◽  
Myung-Geun Han ◽  
Kateryna Foyevtsova ◽  
Hyungki Shin ◽  
...  
Keyword(s):  
Transition Metal ◽  
Density Functional ◽  
Tight Binding ◽  
Crystal Form ◽  
Titanium Monoxide ◽  
Binding Model ◽  
Functional Theory ◽  
Single Crystalline ◽  
First Time ◽  
Lattice Matched

Titanium monoxide (TiO), an important member of the rock salt 3d transition-metal monoxides, has not been studied in the stoichiometric single-crystal form. It has been challenging to prepare stoichiometric TiO due to the highly reactive Ti2+. We adapt a closely lattice-matched MgO(001) substrate and report the successful growth of single-crystalline TiO(001) film using molecular beam epitaxy. This enables a first-time study of stoichiometric TiO thin films, showing that TiO is metal but in proximity to Mott insulating state. We observe a transition to the superconducting phase below 0.5 K close to that of Ti metal. Density functional theory (DFT) and a DFT-based tight-binding model demonstrate the extreme importance of direct Ti–Ti bonding in TiO, suggesting that similar superconductivity exists in TiO and Ti metal. Our work introduces the new concept that TiO behaves more similar to its metal counterpart, distinguishing it from other 3d transition-metal monoxides.

Additions to the Placopsis mycobiota (Trapeliaceae, Ascomycota) of southern South America, with notes on new records (including Aspiciliopsis macrophthalma), and a revised regional key to the species

2010 ◽  
Vol 42 (6) ◽  
pp. 727-737 ◽  
Author(s):  
David J. GALLOWAY
Keyword(s):  
South America ◽  
New Records ◽  
Southern South America ◽  
First Time

AbstractAspiciliopsis macrophthalma, Placopsis fusciduloides, P. gelidioides and P. tararuana are reported for the first time from southern South America. New records for 13 species of Placopsis in southern South America are reported, and a revised key to 22 species of Placopsis and A. macrophthalma in the region is given.

Preparation and Growth of Pb2Sr2Y0.5Ca0.5Cu3O8+δ Thin Film Superconductors

1992 ◽  
Vol 285 ◽  
Author(s):  
S.H.H. Naqvi ◽  
M. Vickers ◽  
S. Tarling ◽  
P. Barnes ◽  
I.W. Boyd
Keyword(s):  
Thin Film ◽  
Pulsed Laser ◽  
Growth Conditions ◽  
Laser Deposition ◽  
Ex Situ ◽  
Dc Resistivity ◽  
Basic Set ◽  
Zero Resistance ◽  
Van Der Pauw ◽  
First Time

ABSTRACTThe lead based superconductor Pb2Sr2Y0.5Ca0.5Cu3O8+δ is a most complex material. If any oxygen is present in the PbO-CuOδ-PbO sandwich layer (i.e. if δ>0) the superconductivity deteriorates. This is also a most difficult material to grow not only because of the large number of cation stoichiometries which have to be precisely balanced but also because of the tendency for multiple phases to form. Pulsed laser deposition (PLD) has been applied to prepare thin films of the 2213-phase on MgO (100) single crystal substrates at low temperature (300°C) in low oxidizing atmospheres. A basic set of ex-situ growth conditions has been determined which produce for the first time good quality films of this material as characterized by DC resistivity using the Van der Pauw method, as well as EDX and XRD. The layers are reasonably c-axis oriented and display a superconducting onset transition temperature of 79K and zero resistance at 65K after subsequent annealing in a nitrogen ambient.

A review of Sharp's types of Aleochara from Latin America (Coleoptera: Staphylinidae)

1989 ◽  
Vol 20 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Jan Klimaszewski
Keyword(s):  
Latin America ◽  
South America ◽  
North American ◽  
Additional Information ◽  
First Time

AbstractA review of David Sharp's types of Aleochara from Mexico, and Central and South America is presented. Nineteen species are treated here, one of which is described as new (A. felixiana), seven are redescribed [A. angusticeps Sharp, A. funestior Sharp, A. mexicana Sharp, A. oxypodia Sharp, A. simulatrix Sharp, A. gracilis (Sharp), and A. duplicata (Sharp)] and one [A. miradoris Sharp] is put in synonymy under A. mexicana Sharp. The remaining ten species were treated in my 1984-revision of North American Aleochara but are here included in a checklist with references to description, redescription, and illustrations. Some additional information is provided for previously synonymized A. torquata Sharp (= A. sallaei Sharp), and for A. quadrata Sharp. Illustrations of genitalic structures of both sexes are provided for the first time for the seven redescribed species. Lectotypes are designated for A. angusticeps, A. duplicata, A. funestior, A. mexicana, and A. oxypodia.

scholarly journals First record of the invasive bee Anthidium manicatum (Hymenoptera: Megachilidae) in Chile

2015 ◽  
pp. 1-5 ◽  
Author(s):  
Jose Miguel Montalva ◽  
Mauro Ríos ◽  
Felipe Vivallo
Keyword(s):  
South America ◽  
New Record ◽  
Ecological Niche ◽  
First Record ◽  
Ecological Niche Model ◽  
Metropolitan Region ◽  
Niche Model ◽  
Invasive Range ◽  
First Time ◽  
Anthidium Manicatum

The Palearctic wool carder bee Anthidium manicatum (Linnaeus) is recorded for the first time in Chile based on eight specimens collected on Lavandula sp. (Lamiaceae) in San Bernardo, Metropolitan Region.  This new record expands the invasive range of this species in South America, confirming previous predictions based on an ecological niche model.

scholarly journals Some digenea parasites of tunny from the coast of Rio de Janeiro State, Brazil

2002 ◽  
Vol 62 (3) ◽  
pp. 453-457 ◽  
Author(s):  
B. M. M. FERNANDES ◽  
A. KOHN ◽  
A. L. SANTOS
Keyword(s):  
South America ◽  
Rio De Janeiro ◽  
Host Record ◽  
Thunnus Albacares ◽  
New Host ◽  
Katsuwonus Pelamis ◽  
New Host Record ◽  
Auxis Thazard ◽  
First Time ◽  
Janeiro State

Rhipidocotyle pentagonum (Ozaki, 1924) is reported for the first time in South America parasitizing Auxis thazard and in a new host Katsuwonus pelamis. Tergestia laticollis (Rudolphi, 1819) is reported for the first time in South America and in Thunnus albacares, representing a new host record. Copiatestes filiferus (Leuckart, in Sars, 1885) is recorded for the first time in Brazil and in Thunnus albacares, another new host record. Tetrochetus coryphaenae (Yamaguti, 1934) is presented for the first time in Brazil parasitizing Thunnus albacares.

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