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Pablo Lehmann A.

Pablo Lehmann A.

Ph D.

About

67
Publications
38,567
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501
Citations
Citations since 2017
26 Research Items
341 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Introduction
Pablo Lehmann Albornoz, has worked at Research and Graduate Studies Office, Biology Graduate Program of Universidade do Vale do Rio dos Sinos (UNISINOS) between the years 2009 and 2022. Pablo does research primarily on Taxonomy and Phylogenetic Systematics of Neotropical Fishes.
Additional affiliations
October 2009 - present
Universidade do Vale do Rio dos Sinos
Position
  • Professor

Publications

Publications (67)
Article
Full-text available
The Neotropical region hosts 4,225 freshwater fish species, ranking first among the world’s most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large-scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north, to the sout...
Article
Full-text available
A new genus of Hypopopomatinae armored catfish is described from the northern portions of South America, namely the Amazon, Orinoco and Guianan coastal drainages. The new genus is diagnosed from all remaining hypoptopomatines by having the canal cheek plate on the ventral surface of the head posteriorly elongated and contacting the cleithrum, in ad...
Article
Full-text available
For almost 30 years, there have been active discussions about the taxonomic impediment and the challenge this represents to address the current human-induced biodiversity crisis. From the start (Systematics Agenda 2000, 1994), the term ‘taxonomic impediment’ has been ambiguous, designating both the insufficiency and inadequacy of the resources put...
Article
Full-text available
Parotocinclus kwarup, new species, is described as a new hypoptopomatine cascudinho from tributaries of the upper Xingu River in the Amazon basin of Brazil. The new species is distinguished from its congeners in northeastern and southeastern Brazil by having the cheek canal plate elongated posteriorly on the ventral surface of the head and in conta...
Article
Full-text available
A new species of Parotocinclus from the upper Rio Paraguaçu, Bahia, Brazil, is described. The new species is distinguished from all congeners by its unique color pattern, with irregular dark blotches resulting in a somewhat marble-spotted pattern on head and trunk of most specimens and dorsum of head with a conspicuous V-shaped light mark from tip...
Article
Full-text available
A recent study based on genomic data by Roxo et al. (2019) provided a phylogeny of the Loricariidae, the largest catfish family and second largest Neotropical fish family with approximately 1,000 species. The study represents a valuable and innovative contribution for understanding higher-level relationships within the family. The phylogenetic tree...
Article
Full-text available
Parasitic nematodes can infect both wild and cultivated fish species and may be the source of many diseases. The consumption of raw fish meat in many countries has been the responsible of nematode related zoonosis. Knowing the risk of consumption of contaminated fish by the local communities, the main goal of this paper is to quantify and report th...
Article
Full-text available
A redescription of Corydoras undulatus Regan, 1912 is presented. The original description of C. undulatus is very succinct, as is its diagnosis, which is based only on external morphology. Additional information in the scientific literature on this species is scarce. Specimens from the distribution area of this species were analyzed; Paraná and Par...
Article
Full-text available
A redescription of Corydoras undulatus Regan, 1912 is presented. The original description of C. undulatus is very succinct, as is its diagnosis, which is based only on external morphology. Additional information in the scientific literature on this species is scarce. Specimens from the distribution area of this species were analyzed; Parana´ and Pa...
Presentation
Full-text available
Research Proposal
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Chapter
Full-text available
Diversidade de Peixes no Campus da Unisinos, São Lepoldo, RS.
Article
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Parotocinclus yaka is described as a new species of hypoptopomatine cascudinho from tributaries of the Rio Tiquié, tributary to the Rio Uaupés, upper Rio Negro drainage, Amazon basin, Amazonas State, Brazil. The new species is distinguished from its congeners in northeastern and southeastern Brazil by having the cheek canal plate elongated posterio...
Poster
Full-text available
Rhamdia quelen é um Siluriforme da família Pimelodidae conhecido popularmente como jundiá, de hábitos noturnos habitando águas calmas com fundo de areia e lama próximos a vegetação. São encontrados desde o centro da Argentina até o sul do México sendo provavelmente um complexo de espécies. Os indivíduos desta espécie são onívoros possuindo uma clar...
Chapter
Full-text available
O campus da Universidade do Vale do Rio dos Sinos (UNISINOS), em São Leopoldo, foi inaugurado em 1974. Em 1986, foi concluída a construção do lago da Escola da Saúde ao lado da Biblioteca, que além de ser um componente de embelezamento paisagístico para o campus, abriga atividades relacionadas à pesquisa (UNISINOS, 1986). Ali seria possível a reali...
Article
Full-text available
The helminths belonging to the class Trematoda have great importance in ichthyoparasitology, and the subclass Digenea includes parasites with zoonotic potential. The family Heterophyidae is responsible for the heterophyiasis and, in Brazil, this disease is caused by the trematode genera Ascocotyle (Phagicola), commonly known as phagicolosis, both r...
Article
Full-text available
The integrated use of water quality parameters and the micronucleus test in fish represent a reliable tool in environmental assessment. Thus, this study aimed to evaluate water physicochemical and microbiological parameters and micronuclei (MN) and nuclear abnormalities (NA) frequencies in peripheral erythrocytes of three native fish species (Bryco...
Article
Full-text available
The integrated use of water quality parameters and the micronucleus test in fish represent a reliable tool in environmental assessment. Thus, this study aimed to evaluate water physicochemical and microbiological parameters and micronuclei (MN) and nuclear abnormalities (NA) frequencies in peripheral erythrocytes of three native fish species (Bryco...
Article
Full-text available
The discovery of three new taxa of Hypoptotopomatini with ambiguous generic assignment prompted a reanalysis of the phylogenetic relationships of the tribe. The analysis focused on a data matrix of 56 terminals and 107 morphological characters comprising the three new taxa, most species of Hypoptopoma and Otocinclus, and all other species of the tr...
Poster
Full-text available
The main purpose of this study was to disseminate partial results of the PhD thesis on phylogenetic systematics of genus Trichomycterus from Colombia.
Article
Full-text available
A new species of Otocinclus (Loricariidae) is described from the Rio Juruena, a right bank tributary of the Rio Tapajós system in Mato Grosso State, central Brazil. The new taxon can be distinguished from its congeners by the possession of an ocular operculum and by a complete lateral line. Additionally, the new species is distinguished by having a...
Article
Full-text available
A new species of Pareiorhaphis is described from the upper Rio Doce basin. The description is based on a series of specimens recently collected in small headwater tributaries to the Rio Guanhães, a tributary of the Rio Santo Antonio, left bank of the Rio Doce in Minas Gerais State, eastern Brazil. Pareiorhaphis vetula, new species, is a small loric...
Article
Full-text available
Parotocinclus spilurus (Fowler)foi descrita originalmente como uma espécie do gênero Plecostomus combase em seis espécimes coletados no rio Salgado, Município de Icó, Estado do Ceará. Devido à descrição original de P. spilurus ser breve e pouco informativa, uma redescrição detalhada desta espécieameaçada combase na série tipo e em topótipos recente...
Poster
Full-text available
Sete espécies de Trichomycterus das bacias Magdalena-Cauca e Pacífico, na Colômbia, e bacia do rio Esmeraldas, no Equador foram estudadas morfo-anatomicamente. A preparação osteológica seguiu procedimentos da técnica de diafanização. Realizou-se levantamento morfométrico, através de paquímetro digital, e merístico, através de lupa esteroscópica bin...
Research
Full-text available
Pareiorhaphis garapia, new species, is described based on specimens collected in the headwaters of the Arroio Garapiá,Rio Maquiné basin, a coastal drainage of Rio Grande do Sul State, southern Brazil. The new species is distinguished from all other Pareiorhaphis species in having the nuchal plate covered by thick skin, the exposed posterior process...
Article
Full-text available
A new species of hypoptopomatine cascudinho is described from a creek tributary to the Amazon River in Leticia, Amazonas Departament, Colombia. The new species of Parotocinclus is distinguished from congeners from northeastern to southeastern Brazilian rivers in having the cheek canal plate elongated posteriorly on the ventral surface of head and c...
Article
Annual fishes, which inhabit temporary pools with extremely limited habitat complexity and niche availability, display remarkable sexual dimorphism, rapid growth, and enormous investment into reproduction, all traits associated with high energy requirement. This study tests three hypotheses for two syntopic annual fishes (Austrolebias minuano and C...
Article
Full-text available
Parotocinclus halbothi described as a new species from the Trombetas and Marowijne river basins, in Brazil and Suriname. The new species is distinguished from its congeners in the Guianas, Orinoco, and Amazon basins by details of color pattern, form and arrangement of bony plates, body shape, and morphometric features. It is distinguished from all...
Poster
Full-text available
O objetivo deste estudo foi estudar a presença e reconhecimento padrão de dimorfismo sexual nos jovens de Australoheros sp. de um lago artificial dos campos de cima da serra, em São Francisco de Paula, RS, por meio de morfometria.
Conference Paper
Full-text available
Oral presentation on the ASIH Joint Meeting, no full-text available
Article
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This study reports the first occurrence of partial albinism in two species of Ariidae: Genidens barbus and Genidens planifrons from an estuary of Southern Brazil. Possible causes of the simultaneous occurrence of three specimens with partial albinism are discussed, including random genetic alterations, chronic contamination effects and small effect...
Article
Full-text available
A new species of the hypoptopomatine loricariid genus Parotocinclus is described based on material from the headwaters of the Rio Jequitinhonha, Minas Gerais State, eastern Brazil. The new species is distinguished from all congeners, except P. prata and P. robustus, by the absence of abdominal plates between the pectoral girdle and the anus. It dif...
Article
Full-text available
This study reports the first occurrence of partial albinism in two species of Ariidae: Genidens barbus and Genidens planifrons from an estuary of Southern Brazil. Possible causes of the simultaneous occurrence of three specimens with partial albinism are discussed, including random genetic alterations, chronic contamination effects and small effect...
Article
Full-text available
Otothyropsis polyodon, sp. n., and O. biamnicus, sp. n., two new species of loricariid catfishes are described from the rio Paraná basin. Otothyropsis biamnicus and O. polyodon differ from two other Otothyropsis by having a longer caudal peduncle, middle series of lateral plates complete and with higher number of plates, and the anterior margin of...
Poster
Full-text available
Trichomycterus gorgona, foi descrito em 2005 por Fernández & Schaefer, a partir de 2 exemplares (Holótipo: ANSP 149946, 63.6 mm SL; Parátipo: ICN-MHN 10019, 58.7 mm SL) coletados em um arroio incorretamente registrado nas coordenadas (02°59'N, 78°11'30"W) a Noroeste da Ilha Gorgona, Colômbia. O objetivo do estudo é fazer uma descrição anatômica de...
Poster
Full-text available
Este estudo teve como objetivo apresentar informações sobre a biologia, ecologia e conservação da espécie Trichomycterus gorgona Fernández & Schaefer 2005 (Siluriformes: Trichomycteridae).
Article
Full-text available
Pareiorhaphis ruschii, new species, is the first neoplecostomine catfish of the genus Pareiorhaphis described based on material from tributaries to the rio Piraquê-Açu and rio Reis Magos, both small coastal drainages in the State of Espírito Santo, eastern Brazil. The new species is promptly diagnosed from all its congeners by features related to t...
Article
Full-text available
Abstract: The introduction of non-native species in inland waters is one of the main threats for aquatic biodiversity. Introduced species may compete for resources, prey on native fauna, spread diseases and parasites. The channel catfish Ictalurus punctatus (Siluriformes, Ictaluridae) was first described by Rafinesque 1818 in the United States and...
Article
Full-text available
A new species of the hypoptopomatine loricariid Parotocinclus is described based on material from three rivers belonging to the upper and middle Rio São Francico basin, the Rio das Velhas and Rio Jequitaí on the right margin and the Rio Paracatu on the left margin. The new species is readily distinguished from all congeners by having the abdomen co...
Article
Full-text available
Plesioptopoma curvidens is a new genus and species of hypoptopomatine loricariid from the upper Rio Paraopeba, a tributary to the Rio São Francisco in southeastern Brazil. Plesioptopoma is attributed to the hypoptopomatines based on five shared synapomorphies, and differs from all remaining members of the subfamily by having the premaxilla and dent...
Poster
Full-text available
O presente estudo tem por objetivo relacionar o impacto da pecuária e a presença de endoparasitas em peixes de arroios da microbacia do Rio Piratini, em Pedro Osório, no Rio Camisas, em Cambará do Sul e no Rio Maquiné em São Francisco de Paula/RS. A pecuária nestas regiões é uma atividade marcante, sendo base da cadeia produtiva, introduzida no séc...
Article
Full-text available
Otothyropsis piribebuy, new species, is described from the río Piribebuy, a tributary to the río Paraguay basin, Cordillera, Paraguay. The new species is distinguished from O. marapoama mainly by having a continuous mid-dorsal series of 17-18 lateral plates, a robust levator crest in the hyomandibula, naked areas in the abdomen, an unpigmented circ...
Article
Full-text available
A new species of Otocinclus (Loricariidae) is described from tributaries to the Rio Madeira, in the State of Amazonas, Brazil. The new taxon can be distinguished from its congeners by lacking middle abdominal plates between the lateral abdominal plates, and by having the dark spot at the base of the caudal fin separated from the midlateral stripe b...
Conference Paper
Full-text available
The Neotropical loricariid catfishes have received a great deal of interest by systematists in the last two decades. In this study we combined a 303 character morphological data matrix of the Neoplecostominae with a 169 character morphological data matrix of the Hypoptopomatinae and a 2634 basepairs matrix (fragments of COI, RAG1, and RAG2) of...
Article
Full-text available
Otocinclus arnoldi from the La Plata basin is resurrected from the synonymy of O. flexilis described from the rio Jacuí drainage, based on three distinguishing features: the possession of five branched pectoral-fin rays, the larger number of enlarged odontodes on the tip of the parieto-supraoccipital posterior process, and having the prootic involv...
Article
Full-text available
Abstract: Hoplerythrinus unitaeniatus is popularly known as jeju or aimara. Widely distributed, occurs in many Central and South America basins, with the São Francisco River as type locality. In Brazil, the southernmost record of the species is the Uruguay River, Rio Grande do Sul State. This study reports the first record of H. unitaeniatus in the...
Article
Full-text available
Acestridium gymnogaster and A. scutatum are described as new from small tributaries to the middle Rio Madeira, Amazonas, Brazil. Acestridium gymnogaster is most similar to A. discus from which It differs In the number of medial unpaired predorsal plates, the arrangement of chromatophores in predorsal area, and the absence of contact midventrally be...
Article
Full-text available
Listed as vulnerable by the Red Book of Colombian Freshwater Fishes (Lehmann and Alvarez-León 2002). Identification: Presence of dark post-orbital stripe, absence of any development of the median caudal-fin rays beyond the primary margin of the fin, caudal-peduncle spot spreads onto the caudal fin, 68–79 lateral line scales; D.ii + 9; P.i + 12–14;...
Article
Full-text available
Parotocinclus arandai, new species of the hypoptopomatine catfish, is described from small creeks in the upper rios Jucuruçu and Buranhém basins, at the border of Brazilian States of Bahia and Minas Gerais. Parotocinclus arandai is distinguished from all congeners from the Atlantic coastal basins of southeastern and eastern Brazil, except Parotocin...
Article
Full-text available
Hisonotus armatus, a new hypoptopomatine species, is described from the Laguna dos Patos basin, Rio Grande do Sul State, southern Brazil. The new species is distinguished from other Hisonotus species by aspects of the morphology of the rostral plate, the arrangement of abdominal plates, and the caudal-fin color pattern. Hisonotus armatus, nova espé...
Article
Full-text available
Gymnotocinclus anosteos, a new genus and species, is described from a headwater stream of the upper rio Tocantins basin in central Brazil. The new taxon is distinguished from other loricariids by the extreme reduction of dermal plates, having an almost completely naked body. Three other diagnostic features are: the absence of the lateral connecting...
Article
Full-text available
A new species of the hypoptopomatine catfish genus Otocinclus is described from two localities in the upper Río Amazonas basin: a tributary of the Río Puré in Colombia and two tributaries to the Río Amazonas near Iquitos in Peru. The new taxon can be easily distinguished from all congeners, except Otocinclus cocama, by having a single, intensely pi...
Article
Full-text available
Apteronotus camposdapazi, new species, from the Rio Tocantins basin, Goiás state, Brazil, is diagnosed by the presence of a white or yellow band on the chin, the dorsal surface of the head and mid-dorsum extending to the beginning of the origin of the mid-sagittal electroreceptive filament; two lights bands on the caudal peduncle throughout ontogen...
Article
Full-text available
Cruciglanis pacifici, gen. et sp. nov., is described from the Dagua and Anchicaya Rivers on the Pacific slope of Colombia. The new genus is differentiated from the other genera in the family by the presence of an ossified crucifix-shaped second basibranchial; ectopterygoid bone shaped as an inverted comma, with its distal end narrow and directed me...
Article
Full-text available
Callichthys serralabium, a new callichthyid catfish species, is described from drainages in the upper Orinoco River, near La Esmeralda, Venezuela and the headwaters of the Negro River, tributary of the Amazon River, both in Brazil and Venezuela. This species is readily distinguished from other Callichthys by possessing a serrated lower lip, 8–9 bra...
Article
Full-text available
La presente investigación muestra la distribución y ocurrencia de 31 especies de peces en el río San Miguel y el zanjón Bagazal en la cuenca del Alto río Cauca. Los peces fueron recolectados entre octubre de 1997 y junio de 1998. Las muestras se tomaron en las partes superior, media y baja de la cuenca. Las especies Characidium fasciatum (29.3%) y...

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