Juan Grados

Juan Grados
National University of San Marcos | UNMSM · Entomologia

Blgo. MS (c)

About

58
Publications
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Introduction
Juan Grados currently works at the Entomologia, National University of San Marcos. Juan does research in Entomology. Their current project is 'Moth (and insect) diversity patterns along an elevational gradient in the Cosñipata valley, SE Peru'.
Skills and Expertise

Publications

Publications (58)
Article
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We explored the concentration patterns of the bioactive metabolite plumericin produced by Himatanthus tarapotensis (Apocynaceae) under different edaphic conditions and variations in rainfall intensity, as well as its potential role in the chemical defense against insect herbivores. Values of plumericin concentration from leaves were obtained by Hig...
Article
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Para el departamento de Loreto se registra 113 especies de Euchromiina (Lepidoptera: Arctiinae). Además, se reportan 9 nuevos registros para Perú: Sphecosoma abnormis, Isanthrene profusa, Autochloris collocata, A. consociata, Andrenimorpha lycopolis, Leucotmemis torrida, Cosmosoma contracta, Pseudomya biradiata y P. cretheis. Se proponen dos nuevos...
Article
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The Neotropical genus Centronia Hübner, 1818 is monotypic and represented by the species Centronia melanitis Hübner, 1818. Individuals of this species display diurnal habits and are attracted by plant bait of Heliotropium sp.. Specimens of Centronia are very rare in museum collections. The present study, notes are provided for the male specimens an...
Article
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Based on external morphological characters and the structure of the male genitalia, a new genus of Euchromiina from the Neotropical region, Apugen. nov. is described. A new species is described, Apu mooreorumsp. nov. and the species Apu flavicornis (Druce) comb. nov. is redescribed. The genus occurs in the montane forests of the Andes. Diagnostic c...
Article
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The hostplant, Schinus molle L. (Anacardiaceae) and the last instar of the Arctiinae Amastus walkeri (Rothschild, 1922) are reported for the first time. Several caterpillars with abundant setae and gregarious behavior, were observed feeding on the leaves of Schinus molle L. in the department of Arequipa, southwestern Peru. Ten caterpillars were col...
Article
The genus Episcepsis Butler, 1877 is widely distributed in the Neotropical region and currently includes 43 valid species many of them described solely based on external morphology. The existence of species complexes makes their identification difficult without examination of genital morphology. Four new species from Brazil, Cuba and Peru are descr...
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Se presenta una lista preliminar y la diagnosis de las especies de Arctiinae de Arequipa. Se propone a Amastus pallescens como nuevo sinónimo de Amastus cellularis. Por primera vez se da a conocer la hembra de A. cellularis. Se revalida la especie Magnoptera watsoni, que fue sinonímizada hace pocos años con Amastus walkeri. Se recolectó durante el...
Article
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Presently, the Neotropical genus Parascepsis Dognin, 1923 is considered monotypic within the Ctenuchina. There are no reviews of a large part of the genera in this subtribe or an approximation to its phylogeny. The material worked with is deposited at the Museo de Historia Natural, Universidad Nacional Mayor de San Marcos (MUSM), and was compared w...
Article
A series of different-looking tiger moths was collected at pyrrolizidine alkaloid baits in the daytime in Peru. They proved to be variants of a new genus, Vanewrightia gen. nov., and a new species, Vanewrightia kiesela sp. nov., both described here. This species presents a striking example of extensive intraspecific variation within a population. I...
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Se reporta por primera vez el género Metacrisia Hampson en Perú, con la especie Metacrisia courregesi (Dognin), que ocurre en la parte norte de la vertiente occidental de los Andes. Se describen una nueva subespecie, M. courregesi mutabilis Grados, ssp. nov. de la Cordillera Blanca (departamento de Huaraz, Perú), y una nueva especie, M. eckstromi G...
Article
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The genus Corematura Butler, 1876 currently comprises two species: Corematura chrysogastra (Perty, 1833) and Corematura postflava (Guérin-Menéville, 1844), historically confused in one taxon. Descriptions of the adults of both species and their geographic distributions in Peru are given: C. chrysogastra occurring in the northern Amazon and C. postf...
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The Museo Argentino de Ciencias Naturales Bernardino Rivadavia (MACN) possesses one of the most important Lepidoptera collections in South America. Here are deposited several type specimens of Lepidoptera, particularly of Arctiinae, described by Burmeister, Berg, Snellen, Jörgensen, Giacomelli, Orfila, and Forster. This study presents a catalogue w...
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A new species of the genus Watsonidia Toulgoët, from the Amazon region of Peru, is described, with two morphotypes. Characters of males and female genitalia of both morphotypes and the genetic analyses (COI) that support the polymorphism of the species are provided. The habitus of males and females is also illustrated.
Conference Paper
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La CTNI es la colección de referencia de la Corporación Colombiana de Investigación Agropecuaria (Agrosavia). En este trabajo, se tuvo como objetivo identificar hasta nivel de genero y/o especie, los especímenes de la subfamilia Arctiinae de Erebidae que se encuentran depositadas en la Colección y que en su gran mayoría hacen parte de las de las po...
Conference Paper
Full-text available
La CTNI es la colección de referencia de la Corporación Colombiana de Investigación Agropecuaria (Agrosavia). En este trabajo, se tuvo como objetivo identificar hasta nivel de genero y/o especie, los especímenes de la subfamilia Arctiinae de Erebidae que se encuentran depositadas en la Colección y que en su gran mayoría hacen parte de las de las po...
Article
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Walkeriella miraculosa gen. n. et sp. n. (Lepidoptera: Hepialoidea: Hepialidae) is based on two specimens collected from rainforest southwest of Puerto Maldonado, Tambopata, Madre de Dios department, southeastern Peru. The distinct genitalia and wing venation separate this taxon from other genera of Hepialidae although four derived characters state...
Article
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Gloora gen. nov. is established for Eucereon alba (Druce, 1894), Hyaleucerea mundula (Berg, 1882), Agaraea sericeum (Zerny, 1931), and Gloora canae sp. nov. These species are (re‑)described considering male genitalia in particular and, in case, barcodes. Further species which might fit into Gloora gen. nov. are discussed.
Article
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Four new species and one new subspecies of Arctiinae (Lepidoptera: Erebidae) are described. Aphyle niedmandi sp. nov., Evius ocassus sp. nov., Paranerita maculata sandeepani ssp. nov., Paranerita kotolnuki sp. nov. and Baritius flexuosus sp. nov. were collected in the Tambopata River region, Madre de Dios (Peru), as part of a Citizen Science Projec...
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Se describen e ilustran tres nuevas especies del género Theages Walker, 1855 que ocurren en los bosques montanos de los Andes de Perú y Ecuador.
Article
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El género Cresera Schaus, 1894 consta de 12 especies, 8 de las cuales ocurren en Perú. Se proporciona una diagnosis de reconocimiento de las especies en base a los caracteres de coloración de las alas, dándose a conocer los patrones de distribuciones geográficas en el Perú.
Article
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Se describe e ilustra la nueva especie Rhipha ignea del departamento de Loreto, Amazonía peruana.
Article
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Se describe e ilustra los adultos del macho de Histioea magistrae, nueva especie de Euchromiina (Arctiini), de la Amazonía sudeste de Perú, comparándola con Histioea hoffmannsi Rothschild, 1911, especie semejante.
Article
The ichneumonid genus Habronyx is recorded for the first time from Peru and Ecuador, and three new species are described and figured-Habronyx (Camposcopus) flavus Alvarado, new species, H. (Habronyx) nigrofasciata Alvarado, new species, and H. (H.) saqsaywaman Alvarado, new species. Hadronyx (H.) punensis is recorded for the first time in Peru. Hab...
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LUIS VENERO. 2015. Los Chíchis, insectos acuáticos (Ephemeroptera: Oligoneuriidae: Lachlania) en la alimentación del Imperio Incaico, Perú. Rev. peru. entomol. 50(2): 45-52. La alimentación de las culturas Pre-colombinas y del Imperio Incaico estuvo basada en diversos productos. Uno de los alimentos utilizados, de ambientes acuáticos continentales,...
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We describe the species composition of the subfamily Ophioninae (Hymenoptera: Ichneumonidae) along an altitudinal gradient in the cloudy forest Monteseco, Cajamarca, Peru collected in 2009 and 2010. Eighteen species were recorded in three genera of Ophioninae: Alophophion, Enicospilus y Ophion. Five species are recorded for the first time in Peru:...
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The adult male and its genitalia are described and illustrated for Coiffaitarctia imperatrix, new species of Phaegopterina (Arctiini) found in the Peruvian Amazon.
Article
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The species Hypanartia splendida Rothschild, 1903 was described from Perú, without giving further information about its type locality. After 105 years, the April 6 2008, a male specimen was collected at the upper parts of Yanachaga-Chemillén National Park, Pasco, Peru. This is the first specimen with precise collection data.
Article
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Seven new Arctiini (Erebidae: Lepidoptera) are reported for Peru. Some of the species are rare among collections. Each new report belongs to different genera and the species given for each genus are those occurring in Peru, according to collections and literature references from their original descriptions. A new synonym is also reported for Agyrti...
Article
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Se presenta siete nuevos registros de Arctiini (Erebidae: Lepidoptera) para Perú. Algunas de las especies son raras en colecciones. Cada nuevo reporte pertenece a géneros diferentes, proporcionando para cada género las especies que ocurren en el Perú, basado en colecciones y las fuentes bibliográficas de las descripciones originales. Se da a conoce...
Article
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Palabras clave: Arctiidae, diversidad, Machu Picchu, Sphingidae, Perú. Summary A list of 80 species of Arctiidae and 17 of Sphingidae recorded until now at the Machu Picchu Historical Sanctuary, Cuzco, Perú, is presented herein, indicating their altitudinal distribution.
Article
During an expedition to Peru in August 2010, a new species of otopheidomenid mite, Prasadiseius incanus Prasad and Guanilo, n. sp. (Acari: Otopheidomenidae), was collected from Xylophanes fusimaculata (Felder, 1874) and Xylophanes undata Rothschild and Jordan, 1903 (Sphinghidae). The female and male of the new species are described using current no...
Article
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The adult sphingid communities of three sites in southeastern Peru representative of the moist tropical forest of the lowland Amazon, the pluvial tropical forest of the upper Amazon and Andean foothills, and the montane cloud forest of the eastern slopes of the Andes were sampled during 2004–2006 by using mercury vapor light traps. In total, 119 sp...
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Androconial organs on terga IV, V, VI and VII in species of the genus Theages Walker, 1855 are described, including its morphology and interspecific variation.
Article
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En el presente trabajo se da a conocer cuatro nuevos sinónimos a nivel de especie de lepidopteros de los grupos Ctenuchini y Eucromiini (Arctiidae) basado en el examen del material tipo primario.
Article
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A list of 80 species of Arctiidae and 17 of Sphingidae recorded until now at the Machu Picchu Historical Sanctuary, Cuzco, Perú, is presented herein, indicating their altitudinal distribution.
Article
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SUMMARY GRADOS J, ORTIZ MS. 2004. The aphids (Homoptera: Aphididae) and their hosts In the Río Rímac valley, Lima, Peru. Rev. per. Ent. 44.- Thirty-one species of aphids and their hosts are recorded from the Río Rímac valley, along a 3000 m altitudinal transect. Data on site and date of collections, as well as colony organization are also included...

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Projects (4)
Project
Know the biogeographic patterns of families that occur in the Neotropical Region
Project
Know the biogeographic patterns of the Arctiinae species of the Neotropical Region