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Neotropical Entomology

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https://www.readbyqxmd.com/read/30426466/touching-the-sky-coccinellids-coleoptera-coccinellidae-at-high-altitudes-in-south-america
#1
G González, A Bustamante, A A Grez
Records of extreme altitudes where several coccinellid species from South America inhabit the Andes of Argentina, Bolivia, Chile, Colombia, Ecuador, and Peru are provided. After an intensive review of several entomological collections and literature, records for 35 species with at least one location over 3500-m elevation were obtained, including the genera Cycloneda (ten species), Eriopis (15 species and one subspecies), Harmonia (one species), Hippodamia (two species), Mimoscymnus (two species), Psyllobora (one species), and Stenadalia (four species)...
November 13, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30414019/considerations-on-the-taxonomy-of-the-genus-arhuaco-adams-and-bernard-1977-and-its-relationships-with-the-genus-pronophila-doubleday-1849-nymphalidae-satyrinae
#2
T W Pyrcz, J Lorenc-Brudecka, A Zubek, C Prieto, P Boyer, K Florczyk, B Wacławik, D Lachowska-Cierlik
Arhuaco Adams & Bernard (1977) is one of the least known genera of Neotropical Satyrinae. It comprises two species and presents an unusual disjunct distribution, with A. ica Adams & Bernard (1977), endemic to the isolated Colombian Sierra Nevada de Santa Marta, and A. dryadina (Schaus 1913) found in the mountains of Costa Rica and Panama. Here, the female of A. dryadina is described, and a new generic diagnosis is presented. Affinities with other genera of the subtribe Pronophilina, in particular the potential closest relatives, such as Pronophila Doubleday (1849), are investigated based on morphological, molecular, ecological, and behavioral data...
November 10, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30414018/antennal-morphology-and-localization-of-a-pheromone-binding-protein-of-lobesia-botrana-denis-schifferm%C3%A3-ller-lepidoptera-tortricidae
#3
R Godoy, C Aburto, P Lizana, H Venthur, R Palma-Millanao, L Méndez, M Panichini, F Moraga, L Bardehle, A Quiroz, A Mutis
In the sensory system of insects, olfactory sensilla constitute important functional elements for discriminating odors. Therefore, we used light microscopy and scanning electron microscopy to investigate the morphology and distribution of sensilla in the antennae of Lobesia botrana (Denis & Schiffermüller). In addition, we studied the expression of the gene encoding for pheromone-binding protein 1 (LbotPBP1) by in situ hybridization. Lobesia botrana antennae are filiform and are subdivided into three segments: scape, pedicel, and flagellum...
November 9, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30406599/combined-application-of-entomopathogenic-nematodes-and-insecticides-in-the-control-of-leaf-miner-tuta-absoluta-meyrick-lepidoptera-gelechiidae-on-tomato
#4
P H S Sabino, A S Negrisoli, V Andaló, C C Filgueiras, A Moino, F S Sales
The present research aimed to investigate the compatibility of entomopathogenic nematodes (EPNs) and registered insecticides for the control of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in the tomato crop, as well as the susceptibility of pupae of T. absoluta to EPNs combined with different percentages below the recommended dose of compatible chemical insecticides in laboratory conditions and in the greenhouse. The species of EPN used was Heterorhabditis amazonensis JPM4. The insecticides used were Actara®, Premio®, and Warrant®...
November 7, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30374739/how-do-collaria-oleosa-and-brachiaria-spp-respond-to-increase-in-carbon-dioxide-levels
#5
D M Silva, A M Auad, J C Moraes, S E B Silva
The current study determines the indirect effect of CO2 level increase on Collaria oleosa (Distant, 1863) (Hemiptera: Miridae) fed on Brachiaria spp. (Poaceae), at two trophic levels, and evaluates resistance to these forages against the insect pest. Mirid bug nymphs and host plant were maintained under four climate environments: (1) nymphs and plants kept at 400 ppm CO2 level; (2) nymphs kept at 400 ppm CO2 level and fed on plants grown at 700 ppm CO2 level; (3) nymphs kept at 700 ppm CO2 level and fed on plants grown at 400 ppm CO2 level; (4) nymphs and plants kept at 700 ppm CO2 level...
October 29, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30374738/a-new-genus-of-endomychinae-coleoptera-endomychidae-from-the-neotropics-with-unusual-mouthparts
#6
E Arriaga-Varela, W Tomaszewska, M Fikáček
Tharina gen. nov. along with T. antennalis (as type species), T. ecuadoriensis, T. micra, and T. peckorum spp. nov. (Coleoptera: Endomychidae: Endomychinae) from Venezuela, Ecuador, and Bolivia are described, diagnosed, and illustrated. Mouthpart structures, in this genus, which are unique within the family Endomychidae, are discussed in terms of their function. Notes on the unusual female genitalia in one species are provided.
October 29, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30374737/diversity-of-stink-bugs-pentatomidae-associated-with-canola-looking-for-potential-pests
#7
F M Bianchi, A L Marsaro Júnior, J Grazia, P R V S Pereira, A R Panizzi
Canola (Brassicaceae: Brassica spp.) is an important feedstock for biodiesel production and a potential ingredient for use in the food industry. In different continents, various arthropod pests damage canola plants. Stink bugs (Heteroptera: Pentatomidae) are present in all zoogeographical regions, and many species are recognized by their economic importance as crop pests. Our aim was to describe the composition, structure, and diversity of the assemblage of stink bugs sampled on canola in southern Brazil. A total of 878 pentatomids were captured, belonging to 27 species...
October 29, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30374736/phylogeography-approach-of-diloboderus-abderus-coleoptera-melolonthidae-in-the-southern-cone-of-america
#8
I Valmorbida, J A Arnemann, M A Cherman, C B Bevilacqua, C R Perini, G A Ugalde, J V C Guedes
Diloboderus abderus (Sturm, 1826) (Coleoptera: Melolonthidae) is a serious soil pest of corn, wheat, oat, and natural and cultivated pastures in Argentina, Paraguay, Uruguay, and southern Brazil. Despite its economic importance, the genetic diversity and population structure of D. abderus remain unknown. We sequenced a fragment of the mitochondrial gene cytochrome oxidase I region (COI), of six populations of D. abderus from the Southern Cone of America. The mtDNA marker revealed a high haplotype diversity, high pairwise FST values, and significant genetic variations among populations...
October 29, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30374735/genetic-status-and-endosymbionts-diversity-of-bemisia-tabaci-gennadius-on-hosts-belonging-to-family-malvaceae-in-india
#9
T R Hashmi, S R Devi, A Ahmad, N M Meshram, R Prasad
A study was instigated to examine the genetic status and distribution of known endosymbionts namely Portiera, Rickettsia, Wolbachia, Cardinium, and Arsenophonus in the populations of Bemisia tabaci (Gennadius) from three host plants: cotton (Gossypium herbaceum), okra (Abelmoschus esculentus L.), and China rose (Hibiscus rosa-sinensis) belonging to the family Malvaceae. The presence of four secondary endosymbionts Rickettsia, Wolbachia, Cardinium, and Arsenophonus was checked in Bemisia tabaci populations. Phylogenetic analyses grounded on the mitochondrial cytochrome oxidase I gene (mtCO1) unveiled the presence of Asia 1, Asia II 1, and Asia II 7 genetic groups for Bemisia tabaci on abovementioned crops...
October 29, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30284151/current-strategies-and-future-outlook-for-managing-the-neotropical-tomato-pest-tuta-absoluta-meyrick-in-the-mediterranean-basin
#10
REVIEW
M Giorgini, E Guerrieri, P Cascone, L Gontijo
The invasion of new regions by exotic pests has been more than ever a critical issue that warrants coordinated international actions to manage established populations and prevent further spreading. Invasive insects can undermine the ecological equilibrium of both natural and agricultural ecosystems. Moreover, increasing temperatures due to climatic change exacerbate this problem by allowing pests to further reach regions previously considered unsuitable. The tomato pinworm Tuta absoluta (Meyrick) (Lepidoptera) is an exotic pest native to Peru that has spread beyond Neotropical America...
October 3, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30280321/leptoceridae-insecta-trichoptera-from-serra-da-canastra-mountain-range-southeast-brazil-diversity-distribution-and-description-of-two-new-species
#11
A L Henriques-Oliveira, I C Rocha, J L Nessimian
The Brazilian savanna, also known as Cerrado, is one of the world's biodiversity hotspots, covering about 22% of the country. Nevertheless, this region has been suffering an accelerated process of degradation due to the agribusiness expansion. This study contributes to increasing knowledge on the Leptoceridae fauna of the Serra da Canastra Mountains at the Minas Gerais State, Brazil. Herein, we illustrate and describe two new species of Leptoceridae, Notalina franciscana sp. nov. and Oecetis catagua sp. nov...
October 2, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30259420/environmental-thresholds-of-nepomorpha-in-cerrado-streams-brazilian-savannah
#12
N F S Giehl, L S Brasil, K Dias-Silva, D S Nogueira, H S R Cabette
Determining thresholds of species loss in response to gradients of human impact is becoming an increasingly important component of stream conservation and management. We analyzed the thresholds of change in populations and communities of the infraorder Nepomorpha along a gradient of environmental integrity in streams of the Brazilian savannah, based on samples from 20 sites. We used the Threshold Indicator Taxa Analysis (TITAN) to identify the location and magnitude of changes associated with the environmental quality and the frequency and abundance of the different taxa...
September 26, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30259419/lagged-population-growth-in-a-termite-host-colony-cause-or-consequence-of-inquilinism
#13
V B Rodrigues, D A Costa, P F Cristaldo, O DeSouza
The presence of foreign organisms in the colonies of social insects could affect energy allocation to growth and reproduction of these hosts. Highly specialized invaders of such long-lived hosts, however, can be selected to be less harmful. After all, it pays for these symbionts to keep their host's good health thereby prolonging cohabitation in the homeostatic environment of the termite colony. Here, we investigated such a hypothesis, focusing on populational parameters of a termite host sharing its nest with an obligatory termite inquiline...
September 26, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30238336/two-new-species-of-the-spittlebug-genus-ocoaxo-fennah-hemiptera-cercopidae-from-mexico-and-keys-for-the-groups-group-three-and-first-subgroup
#14
U Castro-Valderrama, G S Carvalho, D C Peck, J M Valdez-Carrasco, J Romero Nápoles
Insects of the family Cercopidae are known as spittlebugs or froghoppers and are represented by 62 genera in the Neotropical region. One of these genera is Ocoaxo Fennah, 1968 with 30 species. The most recent species to be accepted into this genus, Ocoaxo costaricanus, was described by Nast (Ann Zool 33:93-101, 1975). Herein, two new species of Ocoaxo from Mexico are described. One of these new species forms a complex together with Ocoaxo assimilis (Walker) and Ocoaxo varians (Stål). The complex has economic importance in the mountainous areas of the states of Puebla and Oaxaca because it attacks Pinus spp...
September 20, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30229531/contribution-to-the-species-of-oxyligyrus-arrow-coleoptera-melolonthidae-of-the-peruanus-species-group-with-the-description-of-two-new-species
#15
J S Pinto-Júnior, P C Grossi
Two new species of the genus Oxyligyrus Arrow, 1908 from the peruanus species group are described from Brazil and compared with other species of the genus Oxyligyrus limeirai sp. nov., from Maranhão state and Oxyligyrus vazdemelloi sp. nov. from Mato Grosso state. A key to the peruanus complex and a distribution map of their known brazilian localities is also provided. New state records from Brazil are also presented for Oxyligyrus zoilus (Olivier 1789) the most widespread species of the genus and for O. acutus Endrödi, 1966...
September 18, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30191403/ants-do-not-traverse-the-silk-of-adult-female-nephila-clavipes-linnaeus-webs
#16
E D Knowlton, A Kamath
Many organisms use chemicals to deter enemies. Some spiders can modify the composition of their silk to deter predators from climbing onto their webs. The Malaysian golden orb-weaver Nephila antipodiana (Walckenaer) produces silk containing an alkaloid (2-pyrrolidinone) that functions as a defense against ant invasion-ants avoid silk containing this chemical. In the present study, we test the generality of ants' silk avoidance behavior in the field. We introduced three ant species to the orb webs of Nephila clavipes (Linnaeus) in the tropical rainforest of La Selva, Costa Rica...
September 6, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30182220/a-new-species-of-szeptyckitheca-collembola-symphypleona-sphyrothecinae-from-brazil
#17
D Zeppelini, B C H Lopes, E C A Lima
A new species of the genus Szeptyckitheca is described from the Biological Reserve of Serra do Japi, São Paulo State, Brazil. All species of the genus present trochanteral spine on the first and third legs, cephalic chaeta A1 often absent. The presence of spine in all trochanters, chaetal row F in head, and abdominal and antennal segments with long bristles with capitate apex are relevant features that distinguishes the new species from all known species of the genus. A key to the identification of the species of Szeptyckitheca is presented...
September 4, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30168012/lethal-and-sublethal-toxicity-of-insecticides-to-the-lacewing-ceraeochrysa-cubana
#18
G R Rugno, O Z Zanardi, J R P Parra, P T Yamamoto
The lethal and sublethal effects of 11 insecticides on the predator Ceraeochrysa cubana (Hagen) were assessed under laboratory conditions. First-instar larvae and adults ≤ 48 h old were sprayed with the highest insecticides doses allowed to control Diaphorina citri Kuwayama in the citrus crop. The survival and duration rates of the different development stages, sex ratio, pre-oviposition period, fecundity, and fertility of the insects were evaluated. In the larval bioassay, chlorpyrifos and malathion had lethal effect which none larvae survived...
August 31, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30151672/olive-leaf-extracts-toxicity-to-the-migratory-locust-locusta-migratoria-histopathological-effects-on-the-alimentary-canal-and-acetylcholinesterase-and-glutathione-s-transferases-activity
#19
K Abdellaoui, O Boussadia, M Miladi, I Boughattas, G Omri, M Mhafdhi, M Hazzoug, F Acheuk, M Brahem
The migratory locust, Locusta migratoria (Linnaeus), is the most widespread locust species. Frequent applications of insecticides have inevitably resulted in environmental pollution and development of resistance in some natural populations of the locust. To find a new and safe alternative to conventional insecticides, experiments were conducted to assess the effect of olive leaf extracts on L. migratoria fifth instar larvae. The methanolic extracts were prepared from the leaves sampled during four phenological growth stages of olive tree which are as follows: Cluster formation (Cf), Swelling inflorescence buds (Sib), Full flowering (Ff), and Endocarp hardening (Eh)...
August 27, 2018: Neotropical Entomology
https://www.readbyqxmd.com/read/30141120/ants-response-to-human-induced-disturbance-in-a-rain-tropical-forest
#20
B Walter, A Graclik, P Tryjanowski, O Wasielewski
A high rate of human-induced disturbance of tropical ecosystems results in enormous loss of biodiversity due to local extinctions. Yet, mechanisms at the population level that lead to the extinction are still poorly understood. Here we tested the hypothesis that human-induced disturbance results in smaller amount of nesting sites for wood-dwelling arthropods that leads to smaller population size and diminished reproduction, and therefore, may promote local extinctions. We completed censuses in less-disturbed and human-disturbed secondary rain forest plots in Puerto Rico...
August 23, 2018: Neotropical Entomology
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