Mateus Pepinelli | University of Toronto (original) (raw)

Papers by Mateus Pepinelli

Annales de Limnologie - International Journal of Limnology

"Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences ... more "Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences from the barcode region of cytochrome c oxidase I (COI) to assess Podonomus molecular diversity from mountains in Southeastern Brazil. Our results revealed the adult female and the larvae of Podonomus pepinellii
Roque and Trivinho-Strixino, 2004 and extended the known geographical distribution of the species. Moreover, we found high molecular divergence in two populations located in the Serra da Mantiqueira and Serra do Espinhac¸o mountain range when compared with the only species recorded to Brazil, indicating the possibility of two more species to be described."

Zootaxa, 2012

The last-instar larva of Neoneura ethela Williamson is described and illustrated based on one lar... more The last-instar larva of Neoneura ethela Williamson is described and illustrated based on one larva collected from a thermal water river in Brazil, State of Goiás and reared in the laboratory. The larva of N. ethela can be distinguished from all other South America Neoneura larvae by the following combination of characters: one pair of premental setae, S8-10 with a row of short spines along distal border, lateral gills a little longer than length of abdomen, ventral border of lateral gill armed with a row of about 24 spines. We provide a key to the species of known South American larvae of Neoneura.

Given the general expectation that forest loss can alter biodiversity patterns, we hypothesize th... more Given the general expectation that forest loss can alter biodiversity patterns, we hypothesize that blow fly species abundances differ in a gradient of native vegetation cover. This study was conducted in 17 fragments across different landscapes in central Brazil. Different land cover type proportions were used to represent landscape structure. In total, 2334 specimens of nine species of Calliphoridae were collected. We used principal component analysis (PCA) to reduce dimensionality and multicollinearity of the landscape data. The first component explained 70%, and it represented a gradient of forest-pasture land uses. Alien species showed a wide distribution in different fragments with no clear relationship between the abundance values and the scores of PCA axes, whereas native species occurred only in areas with a predominance of forest cover. Our study revealed that certain native species may be sensitive to forest loss at the landscape scale, and they represent a bioindicator in forensic entomology.

Zootaxa

The female, male, pupa, and larva of Simulium nunesdemelloi n. sp. are described and illustrated.... more The female, male, pupa, and larva of Simulium nunesdemelloi n. sp. are described and illustrated. The new species shares characters with species in the subgenera S. (Thyrsopelma) and S. (Trichodagmia); the pupa has 19 or 20 gill filaments, similar to the pupa of S. orbitale Lutz, which has 21 to 23 filaments. Simulium nunesdemelloi n. sp. was collected in the Alto Rio Negro region, in the northwestern part of Amazonas State, Brazil.

Zootaxa

Simulium jefersoni n. sp. is described based on adults, pupae, and larvae collected in Chapada Di... more Simulium jefersoni n. sp. is described based on adults, pupae, and larvae collected in Chapada Diamantina National Park and the surrounding area, in the state of Bahia, Brazil. Its affinities with other species, distribution, and biology in Brazil are presented. The immature stages of S. jefersoni n. sp. were found in 44% of the 68 streams sampled in the study area. Females did not bite humans in the field.

Zootaxa

A new species of black fly, Simulium (Inaequalium) margaritatum, is described based on the male, ... more A new species of black fly, Simulium (Inaequalium) margaritatum, is described based on the male, female, pupa, and larva. This new species was collected in small streams in the Chapada Diamantina National Park and surrounding area in the state of Bahia, Brazil.

Biota Neotropica

We conducted a freshwater survey from 2004 to 2008 in several localities of Espírito Santo, Brazi... more We conducted a freshwater survey from 2004 to 2008 in several localities of Espírito Santo, Brazil. In total, 66 streams and rivers were sampled in the 12 hydrographic basins of the state. We collected and identified 17 species of which nine represent new records (Simulium pertinax, S. jujuyense, S. rubrithorax, S. subnigrum, S. travassosi, S. spinibranchium, S. hirtipupa, S. lutzianum e S. anamariae). These findings doubled the number of records of black fly species to the State of Espírito Santo, Brazil.

Acta Tropica, 2015

Simulium (Chirostilbia) vitribasi n. sp. from the Mantiqueira mountain range, in São Paulo and Mi... more Simulium (Chirostilbia) vitribasi n. sp. from the Mantiqueira mountain range, in São Paulo and Minas Gerais states, southeastern Brazil, is described and illustrated based on male, female, pupal and larval morphologies. The pupae of the new species is similar to the one of Simulium pertinax Kollar, one of the most voracious black fly species in the South and Southeast regions of Brazil and a target of control programs in these regions. But the pupa of the new species has a large basal fenestra in the gills that distinguishes it from all other S. (Chirostilibia) species. The other life stages of the new species also have morphological characters that distinguish it from the other species in the subgenus: male has scutum black, with patches of thick, golden hairs; female has scutum similar to that of the male, without banding or other markers, abdominal tergites I and II whitish and sternite VIII dark, heavily sclerotized; anal lobe almost as wide as long, with thin, long hairs on its outer margin; larva body cuticle has wide scale-like setae, with lobulated distal margins. Females were not observed biting humans during the fieldwork.

Insect Conservation and Diversity, 2015

1. A new trap is described for capturing adult insects (especially Chironomidae) from madicolous ... more 1. A new trap is described for capturing adult insects (especially Chironomidae) from madicolous habitats in mountainous environments.

Biota Neotropica, 2003

In this paper, the female of S. friedlanderi, collected near São Carlos, State of São Paulo, Braz... more In this paper, the female of S. friedlanderi, collected near São Carlos, State of São Paulo, Brazil, is described and additional information on the male and immature stages are provided.

Acta Tropica, 2014

Black flies (Simuliidae) are considered to be pests in rural and in some urban areas in the south... more Black flies (Simuliidae) are considered to be pests in rural and in some urban areas in the south of Brazil due to the bites of females. Little information exists on the factors that contribute to Simuliidae distribution in these areas. We sampled 39 streams in the state of Rio Grande do Sul in September 2004 to address ecological aspects. Of the 18 species collected, those that occurred in more than 50% of the streams were: Simulium subnigrum Lutz 1910, Simulium pertinax Kollar 1882, Simulium subpallidum Lutz 1910 and Simulium incrustatum Lutz 1910. Species richness was not influenced by any of the environmental or geographical variables considered, and there was no pattern of species co-occurrence, corroborating the hypothesis of a stochastic distribution of the Simuliidae assemblage. When analyzed individually, only three of seven species with occurrence frequency >30% were related to any of the variables measured. The probabilities of occurrence of Simulium jujuyense Paterson & Shannon 1927 and S. pertinax were higher in streams with high values of water pH and electrical conductivity, whereas the opposite was observed for S. incrustatum. Therefore, due to stochastic distribution, the population studies of Simuliidae are more suitable for predicting the occurrence of species in rural areas than are studies of assemblages.

seb-ecologia.org.br

Os metais são os indicadores mais apropriados de poluição, devido a sua estabilidade no sedimento... more Os metais são os indicadores mais apropriados de poluição, devido a sua estabilidade no sedimento e escassez na natureza. São considerados como um dos contaminantes mais comuns nas águas e sua origem pode ser natural ou antrópica . A origem antrópica dos metais pode vir através dos efluentes industriais, atividades de mineração e, de maneira especial, das áreas agrícolas através do processo de lixiviação do solo (Corbi, et. al. in press). Nos ambientes aquáticos, os metais se concentram principalmente no sedimento. Por sua vez, o sedimento aquático pode contribuir significativamente nas concentrações de metais nos insetos aquáticos . Os insetos representam cerca de 95% da comunidade bentônica, são importantes na alimentação de peixes e na ciclagem dos nutrientes (Wetzel, 1975). Esses organismos vivem, na maior parte do tempo, em contato direto com o sedimento aquático e, dessa forma, podem acumular os metais desse compartimento aquáticos, através da alimentação e da absorção pelo corpo. Os metais, por sua vez, podem sofrer processos de bioacumulação em diferentes níveis tróficos, como por exemplo, se acumulando na gordura de peixes e crustáceos ou ainda em aves e outros animais terrestres, como no leite das vacas que utilizam a água de córregos e rios contaminados e, principalmente, em organismos do topo da cadeia trófica na qual o homem está inserido (Santos, 1999; Oliveira & Tornisielo, 2000).

Zoological Journal of the Linnean Society, 2013

A geometric morphometric analysis was conducted on wing-vein landmarks on exemplar species of the... more A geometric morphometric analysis was conducted on wing-vein landmarks on exemplar species of the family Simuliidae of the following genera: Parasimulium, and Simulium. Generalized least squares superimposition was performed on landmarks, followed by a principal component analysis on resulting Procrustes distances. Patterns of shape change along the principal component axes were visualized using the thin-plate spline. The analysis revealed wing shape diversity through (1) the insertion points of the subcosta and R1, resulting in the terminus of the costa exhibiting a trend towards a more apical position on the wing, and (2) the insertion point of the humeral cross vein, resulting in the anterior branch of the media exhibiting a trend toward a more basal position on the wing. Canonical variates analysis of Procrustes distances successfully assigned all exemplar species into their a priori taxonomic groupings. The diversity in wing shape reveals a trend towards decreased length of basal radial cell and increased costalization of anterior wing veins in the evolutionary transition from plesiomorphic prosimuliines to more derived simuliines. The functional significance of these evolutionary transitions is discussed.

Zootaxa, 2010

The male, female, pupa and larva of Simulium litobranchium n. sp. are described and illustrated. ... more The male, female, pupa and larva of Simulium litobranchium n. sp. are described and illustrated. This new species has 12 gill filaments, as do S. duodenicornium Pepinelli, Hamada & Trivinho-Strixino, S. guianense Wise, S. hirtipupa Lutz, S. perplexum Shelley, Maia-Herzog, Lunas Dias & Couch and S. scutistriatum Lutz, but it can be distinguished from these other species by a combination of characters observed at the pupal and adult stages. DNA barcoding showed that Simulium litobranchium n. sp. exhibits more than 4% nucleotide divergence in cytochrome oxidase I from three other closely related species in the Neotropical subgenus S. (Thyrsopelma). The new species was collected in the Brazilian states of Goiás and Minas Gerais and inhabits rivers 30-40 m in width in the Paraná River hydrographic basin. Females were not observed engaging in anthropophilic behavior.

Immature stages of Simuliidae (Diptera, Nematocera) and characterization of its habitats in the P... more Immature stages of Simuliidae (Diptera, Nematocera) and characterization of its habitats in the Parque Estadual Intervales, SP, Brazil. Larvae and pupae of Simuliidae species living in Parque Estadual Intervales streams were collected in two periods (August/2001 and February/2002) in six streams of the Rio Ribeira basin segment inside the biological reserve. Thirteen species were identified. S. nogueirai and S. subclavibranchium were the most frequent and abundant species. The Simuliidae abundance was higher in the wet season (February/2002) and in organic substrates (leaves, woods, stems).

Annales de Limnologie - International Journal of Limnology, 2012

Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences f... more Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences from the barcode region of cytochrome c oxidase I (COI) to assess Podonomus molecular diversity from mountains in Southeastern Brazil. Our results revealed the adult female and the larvae of Podonomus pepinellii Roque and Trivinho-Strixino, 2004 and extended the known geographical distribution of the species. Moreover, we found high molecular divergence in two populations located in the Serra da Mantiqueira and Serra do Espinhac¸o mountain range when compared with the only species recorded to Brazil, indicating the possibility of two more species to be described.

Annales de Limnologie - International Journal of Limnology

"Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences ... more "Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences from the barcode region of cytochrome c oxidase I (COI) to assess Podonomus molecular diversity from mountains in Southeastern Brazil. Our results revealed the adult female and the larvae of Podonomus pepinellii
Roque and Trivinho-Strixino, 2004 and extended the known geographical distribution of the species. Moreover, we found high molecular divergence in two populations located in the Serra da Mantiqueira and Serra do Espinhac¸o mountain range when compared with the only species recorded to Brazil, indicating the possibility of two more species to be described."

Zootaxa, 2012

The last-instar larva of Neoneura ethela Williamson is described and illustrated based on one lar... more The last-instar larva of Neoneura ethela Williamson is described and illustrated based on one larva collected from a thermal water river in Brazil, State of Goiás and reared in the laboratory. The larva of N. ethela can be distinguished from all other South America Neoneura larvae by the following combination of characters: one pair of premental setae, S8-10 with a row of short spines along distal border, lateral gills a little longer than length of abdomen, ventral border of lateral gill armed with a row of about 24 spines. We provide a key to the species of known South American larvae of Neoneura.

Given the general expectation that forest loss can alter biodiversity patterns, we hypothesize th... more Given the general expectation that forest loss can alter biodiversity patterns, we hypothesize that blow fly species abundances differ in a gradient of native vegetation cover. This study was conducted in 17 fragments across different landscapes in central Brazil. Different land cover type proportions were used to represent landscape structure. In total, 2334 specimens of nine species of Calliphoridae were collected. We used principal component analysis (PCA) to reduce dimensionality and multicollinearity of the landscape data. The first component explained 70%, and it represented a gradient of forest-pasture land uses. Alien species showed a wide distribution in different fragments with no clear relationship between the abundance values and the scores of PCA axes, whereas native species occurred only in areas with a predominance of forest cover. Our study revealed that certain native species may be sensitive to forest loss at the landscape scale, and they represent a bioindicator in forensic entomology.

Zootaxa

The female, male, pupa, and larva of Simulium nunesdemelloi n. sp. are described and illustrated.... more The female, male, pupa, and larva of Simulium nunesdemelloi n. sp. are described and illustrated. The new species shares characters with species in the subgenera S. (Thyrsopelma) and S. (Trichodagmia); the pupa has 19 or 20 gill filaments, similar to the pupa of S. orbitale Lutz, which has 21 to 23 filaments. Simulium nunesdemelloi n. sp. was collected in the Alto Rio Negro region, in the northwestern part of Amazonas State, Brazil.

Zootaxa

Simulium jefersoni n. sp. is described based on adults, pupae, and larvae collected in Chapada Di... more Simulium jefersoni n. sp. is described based on adults, pupae, and larvae collected in Chapada Diamantina National Park and the surrounding area, in the state of Bahia, Brazil. Its affinities with other species, distribution, and biology in Brazil are presented. The immature stages of S. jefersoni n. sp. were found in 44% of the 68 streams sampled in the study area. Females did not bite humans in the field.

Zootaxa

A new species of black fly, Simulium (Inaequalium) margaritatum, is described based on the male, ... more A new species of black fly, Simulium (Inaequalium) margaritatum, is described based on the male, female, pupa, and larva. This new species was collected in small streams in the Chapada Diamantina National Park and surrounding area in the state of Bahia, Brazil.

Biota Neotropica

We conducted a freshwater survey from 2004 to 2008 in several localities of Espírito Santo, Brazi... more We conducted a freshwater survey from 2004 to 2008 in several localities of Espírito Santo, Brazil. In total, 66 streams and rivers were sampled in the 12 hydrographic basins of the state. We collected and identified 17 species of which nine represent new records (Simulium pertinax, S. jujuyense, S. rubrithorax, S. subnigrum, S. travassosi, S. spinibranchium, S. hirtipupa, S. lutzianum e S. anamariae). These findings doubled the number of records of black fly species to the State of Espírito Santo, Brazil.

Acta Tropica, 2015

Simulium (Chirostilbia) vitribasi n. sp. from the Mantiqueira mountain range, in São Paulo and Mi... more Simulium (Chirostilbia) vitribasi n. sp. from the Mantiqueira mountain range, in São Paulo and Minas Gerais states, southeastern Brazil, is described and illustrated based on male, female, pupal and larval morphologies. The pupae of the new species is similar to the one of Simulium pertinax Kollar, one of the most voracious black fly species in the South and Southeast regions of Brazil and a target of control programs in these regions. But the pupa of the new species has a large basal fenestra in the gills that distinguishes it from all other S. (Chirostilibia) species. The other life stages of the new species also have morphological characters that distinguish it from the other species in the subgenus: male has scutum black, with patches of thick, golden hairs; female has scutum similar to that of the male, without banding or other markers, abdominal tergites I and II whitish and sternite VIII dark, heavily sclerotized; anal lobe almost as wide as long, with thin, long hairs on its outer margin; larva body cuticle has wide scale-like setae, with lobulated distal margins. Females were not observed biting humans during the fieldwork.

Insect Conservation and Diversity, 2015

1. A new trap is described for capturing adult insects (especially Chironomidae) from madicolous ... more 1. A new trap is described for capturing adult insects (especially Chironomidae) from madicolous habitats in mountainous environments.

Biota Neotropica, 2003

In this paper, the female of S. friedlanderi, collected near São Carlos, State of São Paulo, Braz... more In this paper, the female of S. friedlanderi, collected near São Carlos, State of São Paulo, Brazil, is described and additional information on the male and immature stages are provided.

Acta Tropica, 2014

Black flies (Simuliidae) are considered to be pests in rural and in some urban areas in the south... more Black flies (Simuliidae) are considered to be pests in rural and in some urban areas in the south of Brazil due to the bites of females. Little information exists on the factors that contribute to Simuliidae distribution in these areas. We sampled 39 streams in the state of Rio Grande do Sul in September 2004 to address ecological aspects. Of the 18 species collected, those that occurred in more than 50% of the streams were: Simulium subnigrum Lutz 1910, Simulium pertinax Kollar 1882, Simulium subpallidum Lutz 1910 and Simulium incrustatum Lutz 1910. Species richness was not influenced by any of the environmental or geographical variables considered, and there was no pattern of species co-occurrence, corroborating the hypothesis of a stochastic distribution of the Simuliidae assemblage. When analyzed individually, only three of seven species with occurrence frequency >30% were related to any of the variables measured. The probabilities of occurrence of Simulium jujuyense Paterson & Shannon 1927 and S. pertinax were higher in streams with high values of water pH and electrical conductivity, whereas the opposite was observed for S. incrustatum. Therefore, due to stochastic distribution, the population studies of Simuliidae are more suitable for predicting the occurrence of species in rural areas than are studies of assemblages.

seb-ecologia.org.br

Os metais são os indicadores mais apropriados de poluição, devido a sua estabilidade no sedimento... more Os metais são os indicadores mais apropriados de poluição, devido a sua estabilidade no sedimento e escassez na natureza. São considerados como um dos contaminantes mais comuns nas águas e sua origem pode ser natural ou antrópica . A origem antrópica dos metais pode vir através dos efluentes industriais, atividades de mineração e, de maneira especial, das áreas agrícolas através do processo de lixiviação do solo (Corbi, et. al. in press). Nos ambientes aquáticos, os metais se concentram principalmente no sedimento. Por sua vez, o sedimento aquático pode contribuir significativamente nas concentrações de metais nos insetos aquáticos . Os insetos representam cerca de 95% da comunidade bentônica, são importantes na alimentação de peixes e na ciclagem dos nutrientes (Wetzel, 1975). Esses organismos vivem, na maior parte do tempo, em contato direto com o sedimento aquático e, dessa forma, podem acumular os metais desse compartimento aquáticos, através da alimentação e da absorção pelo corpo. Os metais, por sua vez, podem sofrer processos de bioacumulação em diferentes níveis tróficos, como por exemplo, se acumulando na gordura de peixes e crustáceos ou ainda em aves e outros animais terrestres, como no leite das vacas que utilizam a água de córregos e rios contaminados e, principalmente, em organismos do topo da cadeia trófica na qual o homem está inserido (Santos, 1999; Oliveira & Tornisielo, 2000).

Zoological Journal of the Linnean Society, 2013

A geometric morphometric analysis was conducted on wing-vein landmarks on exemplar species of the... more A geometric morphometric analysis was conducted on wing-vein landmarks on exemplar species of the family Simuliidae of the following genera: Parasimulium, and Simulium. Generalized least squares superimposition was performed on landmarks, followed by a principal component analysis on resulting Procrustes distances. Patterns of shape change along the principal component axes were visualized using the thin-plate spline. The analysis revealed wing shape diversity through (1) the insertion points of the subcosta and R1, resulting in the terminus of the costa exhibiting a trend towards a more apical position on the wing, and (2) the insertion point of the humeral cross vein, resulting in the anterior branch of the media exhibiting a trend toward a more basal position on the wing. Canonical variates analysis of Procrustes distances successfully assigned all exemplar species into their a priori taxonomic groupings. The diversity in wing shape reveals a trend towards decreased length of basal radial cell and increased costalization of anterior wing veins in the evolutionary transition from plesiomorphic prosimuliines to more derived simuliines. The functional significance of these evolutionary transitions is discussed.

Zootaxa, 2010

The male, female, pupa and larva of Simulium litobranchium n. sp. are described and illustrated. ... more The male, female, pupa and larva of Simulium litobranchium n. sp. are described and illustrated. This new species has 12 gill filaments, as do S. duodenicornium Pepinelli, Hamada & Trivinho-Strixino, S. guianense Wise, S. hirtipupa Lutz, S. perplexum Shelley, Maia-Herzog, Lunas Dias & Couch and S. scutistriatum Lutz, but it can be distinguished from these other species by a combination of characters observed at the pupal and adult stages. DNA barcoding showed that Simulium litobranchium n. sp. exhibits more than 4% nucleotide divergence in cytochrome oxidase I from three other closely related species in the Neotropical subgenus S. (Thyrsopelma). The new species was collected in the Brazilian states of Goiás and Minas Gerais and inhabits rivers 30-40 m in width in the Paraná River hydrographic basin. Females were not observed engaging in anthropophilic behavior.

Immature stages of Simuliidae (Diptera, Nematocera) and characterization of its habitats in the P... more Immature stages of Simuliidae (Diptera, Nematocera) and characterization of its habitats in the Parque Estadual Intervales, SP, Brazil. Larvae and pupae of Simuliidae species living in Parque Estadual Intervales streams were collected in two periods (August/2001 and February/2002) in six streams of the Rio Ribeira basin segment inside the biological reserve. Thirteen species were identified. S. nogueirai and S. subclavibranchium were the most frequent and abundant species. The Simuliidae abundance was higher in the wet season (February/2002) and in organic substrates (leaves, woods, stems).

Annales de Limnologie - International Journal of Limnology, 2012

Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences f... more Podonomus Philippi was recently found in Brazilian inselbergs. In this study, we used sequences from the barcode region of cytochrome c oxidase I (COI) to assess Podonomus molecular diversity from mountains in Southeastern Brazil. Our results revealed the adult female and the larvae of Podonomus pepinellii Roque and Trivinho-Strixino, 2004 and extended the known geographical distribution of the species. Moreover, we found high molecular divergence in two populations located in the Serra da Mantiqueira and Serra do Espinhac¸o mountain range when compared with the only species recorded to Brazil, indicating the possibility of two more species to be described.