Division Entomologia

Mar del Plata, Argentina

Division Entomologia

Mar del Plata, Argentina

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The type specimens of Tettigoniidae described by S. de Toledo Piza were photographed for Orthoptera Species File Online and examined. As a result of this revision several species are moved to different genera and two species to different subfamilies, 20 genera and 10 species are synonymized, one species is resurrected from synonymy, and two new genera are created, each accommodating a unique species described by Piza: Toledopizia gen. nov. (Conocephalinae: Copiphorini) and Pizatettix gen. nov. (Pseudophyllinae: Platyphyllini). In total there are 32 new combinations of species names. The paper includes a checklist and explanations for all nomenclatural changes. Copyright © 2010 Magnolia Press.


Song H.,University of Central Florida | Song H.,Texas A&M University | Amedegnato C.,University Pierre and Marie Curie | Cigliano M.M.,Division Entomologia | And 5 more authors.
Cladistics | Year: 2015

Orthoptera is the most diverse order among the polyneopteran groups and includes familiar insects, such as grasshoppers, crickets, katydids, and their kin. Due to a long history of conflicting classification schemes based on different interpretations of morphological characters, the phylogenetic relationships within Orthoptera are poorly understood and its higher classification has remained unstable. In this study, we establish a robust phylogeny of Orthoptera including 36 of 40 families representing all 15 currently recognized superfamilies and based on complete mitochondrial genomes and four nuclear loci, in order to test previous phylogenetic hypotheses and to provide a framework for a natural classification and a reference for studying the pattern of divergence and diversification. We find strong support for monophyletic suborders (Ensifera and Caelifera) as well as major superfamilies. Our results corroborate most of the higher-level relationships previously proposed for Caelifera, but suggest some novel relationships for Ensifera. Using fossil calibrations, we provide divergence time estimates for major orthopteran lineages and show that the current diversity has been shaped by dynamic shifts of diversification rates at different geological times across different lineages. We also show that mitochondrial tRNA gene orders have been relatively stable throughout the evolutionary history of Orthoptera, but a major tRNA gene rearrangement occurred in the common ancestor of Tetrigoidea and Acridomorpha, thereby representing a robust molecular synapomorphy, which has persisted for 250 Myr. © 2015 The Willi Hennig Society.


Spinelli G.R.,Division Entomologia | Aybar C.V.,National University of Tucuman | Juri M.J.D.,National University of Tucuman | Juri M.J.D.,National University of Chilecito | And 2 more authors.
Memorias do Instituto Oswaldo Cruz | Year: 2013

The following two new species of Culicoides from the Argentinean Yungas are described, illustrated and placed to subgenus or species group and compared with related congeners: Culicoides calchaqui Spinelli & Veggiani Aybar and Culicoides willinki Spinelli & Veggiani Aybar. Culicoides daedaloides Wirth & Blanton is recorded for the first time for Argentina and Culicoides pseudoheliconiae Felippe-Bauer is firstly mentioned from the northwestern region of the country.


Torretta J.P.,University of Buenos Aires | Torretta J.P.,CONICET | Durante S.P.,Division Entomologia | Colombo M.G.,Division Entomologia | Basilio A.M.,University of Buenos Aires
Apidologie | Year: 2012

The nesting biology of the leafcutting bee Megachile (Pseudocentron) gomphrenoides Vachal (Hymenoptera: Megachilidae) was studied in an agro-ecosystem in the Province of Buenos Aires, Argentina. Data were obtained from trap-nests placed in the field margin during two agricultural years (2008/2009 and 2009/2010). Females made an average of 7.55 cells per nest, and used leaves of at least three plant species to build their nests. Provisions of cells were principally of Asteraceae pollen. Adult emergence showed a bimodal pattern suggesting a facultative bivoltinism life cycle. Approximately, 30 % of all offspring failed to complete development to the adult stage and an additional 10 % were killed by natural enemies. These included parasitic wasps (Eulophidae: Melittobia and Horismenus), a cleptoparasite bee (Megachilidae: Coelioxys), and a bristle beetle (Meloidae: Tetraonyx). The host/cleptoparasite association between M. gomphrenoides and Coelioxys remissa constitutes the first such record for both species, and the Megachile-Tetraonyx interaction was previously unknown. M. gomphrenoides possesses some characteristics that make it an interesting potential opportunity to use this species for pollination of commercial sunflowers in the Pampean region. © 2012 INRA, DIB and Springer-Verlag, France.


Veggiani Aybar C.A.,National University of Tucuman | Dantur Juri M.J.,National University of Tucuman | Lizarralde De Grosso M.S.,National University of Tucuman | Spinelli G.R.,Division Entomologia
Medical and Veterinary Entomology | Year: 2010

The species diversity and seasonal abundance of biting midges of the genus Culicoides (Diptera: Ceratopogonidae) were studied in northwestern Argentina during the period 2003-2005. A total of 5437 Culicoides specimens were collected using CDC light traps in three areas of the mountainous rainforest area. The most common species were Culicoides paraensis (Goeldi) and C. insignis Lutz, Culicoides lahillei (Iches), C. venezuelensis Ortiz & Mirsa, C. debilipalpis Lutz and C. crescentis Wirth & Blanton were also collected. Culicoides paraensis was abundant during the summer, and C. insignis and C. lahillei during late summer and early fall. Accumulated rainfall was the climatic variable most related to fluctuation in abundance of C. paraensis. © 2010 The Authors. Journal compilation © 2010 The Royal Entomological Society.


Husemann M.,Baylor University | Guzman N.V.,University of Buenos Aires | Danley P.D.,Baylor University | Cigliano M.M.,Division Entomologia | Confalonieri V.A.,University of Buenos Aires
Journal of Biogeography | Year: 2013

Aim: Trimerotropis pallidipennis represents a species complex of band-winged grasshopper distributed over North and South America. Previous studies indicated a North American origin of the species and suggested that colonization of South America occurred during the Pleistocene after the closure of the Isthmus of Panama. Here we use a phylogeographical approach in order to test different biogeographical scenarios and determine how many distinct units exist within the species complex. Location: North and South America with specific emphasis on the Andes mountains of South America. Methods: We sequenced two mitochondrial and two nuclear genes for multiple specimens belonging to each taxonomic unit. Using the concatenated dataset and a coalescent-based approach we estimated the phylogeny of the complex. In order to distinguish the different biogeographical and species delimitation hypotheses we constrained our dataset to different taxon sets and ran Bayesian analyses in *beast. Posterior probabilities and DensiTree plots allowed us to determine the best hypotheses. We used a molecular clock approach to correlate geological events with observed phylogenetic splits. Results: All analyses indicate the existence of at least three distinct genetic lineages: Trimerotropis pallidipennis from North America, Trimerotropis ochraceipennis from Chile and an undescribed Trimerotropis species from Argentina. The split between North and South American forms took place about 1.3 Ma, long after the Isthmus of Panama had been completed. Biogeographical analyses suggest a first dispersal event from North to South America. Subsequent dispersion and vicariance probably led to the differentiation of the endemics now found in Chile and Argentina. Main conclusions: We demonstrate the existence of three distinct genetic lineages in the Trimerotropis pallidipennis species complex. These lineages are also chromosomally differentiated as previous studies have indicated. Dispersion of T. pallidipennis from North to South America probably occurred during the early Pleistocene, when climatic conditions were more suitable. Subsequent diversification in South America was the result of range expansion and vicariance, possibly in response to later Pleistocene glaciations of the Andes. © 2012 Blackwell Publishing Ltd.


Cigliano M.,Division Entomologia | Amedegnato C.,French Natural History Museum
Systematic Entomology | Year: 2010

The high-Andean genus Jivarus Giglio-Tos from Ecuador, Colombia and Peru is revised. Morphological cladistic analysis indicated that Jivarus montanus and the new species digiticercus. sp.n. and rugosus. sp.n. must be treated as a separate genus, Maylasacris gen.n. The remaining species included in the analysis are assigned to the genus Jivarus, for which the following six species groups are identified: americanus group, antisanae group, carbonelli group, cohni group, pictifrons group and jagoi group. Twenty-nine species are recognized for Jivarus, with ten described as new: J. rectus. sp.n., J. megacercus sp.n., J. spatulus. sp.n., J. auriculus. sp.n., J. riveti. sp.n., J. sphaericus. sp.n., J. discoloris. sp.n., J. profundus. sp.n., J. ronderosi. sp.n. and J. guarandaensis. sp.n. The following new synonymies are proposed: Jivarus albolineatus Ronderos with J. antisanae (Bolivar) syn.n., J. cerdai Ronderos and J. osunai Ronderos with J. alienus (Walker) syn.n., and J. rubriventris Ronderos with J. ecuadorica (Hebard) syn.n.; the new combinations Jivarus ecuadorica (Ronderos) comb.n. and Maylasacris montanus (Ronderos) comb.n. are proposed. Keys to the species of the genera and a review of the morphological characters defining the taxa are provided. Patterns of distribution of the clades coincide with the geography of the northern Andes of Colombia and Ecuador. Areas of endemism of the Jivarus species groups and Maylasacris are delimited by both the high-altitude curves, including transverse zones, and the drier climates of the intra-Andean valleys, clearly indicating recent, post-glacial palaeogeography, as shown also in vegetation distributions. This paper has been formatted with many embedded links to images of type and paratype specimens, maps based on geo-referenced specimen data and species keys available on the Orthoptera Species file online (http://orthoptera.speciesfile.org). © 2010 The Authors. Systematic Entomology © 2010 The Royal Entomological Society.


Spinelli G.R.,Division Entomologia | Ronderos M.M.,Division Entomologia | Funes A.,Division Entomologia
Aquatic Insects | Year: 2016

The pupae of the predaceous midges, Pachyhelea pachymera (Williston, 1900) and Clastrieromyia dycei Spinelli and Grogan, 1986, are redescribed and illustrated using modern terminology from specimens collected in Buenos Aires and Entre Ríos Provinces, Argentina, and Artigas Department, Uruguay. Both species exhibit elongated, thin anteromedial sensilla that are characteristic of other genera in the tribe Palpomyiini. Character differences from known pupae of the New World species in the Palpomyia tibialis group are noted for P. pachymera and differences from other Palpomyiini genera are noted for C. dycei. © 2016 Taylor & Francis.


Diaz F.,Division Entomologia | Spinelli G.R.,Division Entomologia | Donato M.,National University of La Plata | Ronderos M.M.,Museo de La Plata
Journal of Natural History | Year: 2014

We provide a taxonomic revision of the Dasyhelea mutabilis species group inhabiting Patagonia, including diagnoses and identification key for both sexes of all species, descriptions and illustrations of seven new and three previously described species, and a discussion of phylogenetic relationships for each species. In addition, a cladistic analysis of the Neotropical and Nearctic species of the mutabilis group was performed using TNT version 1.1. It suggests that this group is not monophyletic, and this and other results are discussed within a phylogenetic framework.http://zoobank.org/urn:lsid:zoobank.org:pub:39D6AE31-36D1-4CBF-8C43-40050801ECAD. © 2014 © 2014 Taylor & Francis.


Marino P.I.,Division Entomologia | Ronderos M.M.,Division Entomologia | Spinelli G.R.,Division Entomologia
Aquatic Insects | Year: 2010

The fourth instar larva and pupa of Forcipomyia (Phytohelea) bromelicola (Lutz) are redescribed and illustrated, and compared with immatures of F. (P.) musae Clastrier and Delécolle and F. (P.) dominicana de Meillon and Wirth. Both life stages were photographed using scanning electron microscopy and phase-contrast light microscopy. The immatures were collected from bromeliads in Florida, USA. © 2010 Taylor & Francis.

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