Article
Paleontology
Sergio Bogan, Federico L. Agnolin
Summary: This study describes a partial fossil skull of the catfish genus Sorubim from the Late Miocene Ituzaingo Formation in Entre Rios Province, Argentina. The material is identified to genus level only, as living species of Sorubim are morphologically similar. This finding represents the first fossil record for the genus.
ANNALES DE PALEONTOLOGIE
(2021)
Article
Zoology
Jamie Bojko, Antonella Frizzera, Nuria Vazquez, Gillian Taylor, Vikki Rand, Florencia Cremonte
Summary: Carcinus spp. are global aquatic invaders that carry various parasites, including a recently discovered unidentified microsporidian from Argentina. Genome drafts are provided for two parasite isolates from different Carcinus species, and their similarities are outlined using multi-gene phylogenetics and genome comparison methods. The SSU genes are 100% similar, while other genes have an average similarity of 99.31%. The parasite is informally named Agmasoma carcini, with the isolates designated as Ac. var. aestuarii and Ac. var. maenas, based on the available genomic data for each species. This study builds upon the histological identification of this parasite by Frizzera et al. (2021).
JOURNAL OF INVERTEBRATE PATHOLOGY
(2023)
Article
Zoology
Leandro Balboni, Facundo Vargas, Dario Colautti
Summary: The age and growth of Pseudoplatystoma corruscans were analyzed based on length frequency distribution and growth marks of pectoral spines. Results showed that different growth models are suitable for males and females of the species, suggesting the need for separate studies for each sex and consideration of this characteristic in fishing regulations.
NEOTROPICAL ICHTHYOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Luciano Brambilla, Marcelo Javier Toledo, Damian Alberto Ibarra
Summary: A fragment of a Pimelodidae neurocranium was found in late Pleistocene deposits in the Carcarana river, Santa Fe, Argentina, and identified as Pseudoplatystoma corruscans. The study reveals significant intraspecific morphological variation in the species, with the fossil falling within the range of variation shown by this species. Additionally, the stratigraphy of the Carcarana and Parana rivers was studied to aid in paleontological and future biostratigraphic schemes in Santa Fe.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Giselle Moura Guimaraes-Marques, Adriano de Jesus Bentes, Kyara Martins Formiga, Jacqueline da Silva Batista
Summary: This study constructed a genomic library of Hypophthalmus donascimientoi and designed 39 microsatellite markers. The analysis of three populations of H. donascimientoi showed that these markers revealed the genetic variability of this species. In addition, seven of the markers were successfully amplified in other congeneric species, demonstrating their effectiveness in phylogenetic analysis.
MOLECULAR BIOLOGY REPORTS
(2023)
Article
Zoology
G. A. B. R. I. E. L. S. C. SILVA, L. A. I. S. REIA, C. E. S. A. R. K. MORIMOTO, R. I. C. A. R. D. O. C. BENINE, C. L. A. U. D. I. O. OLIVEIRA
Summary: The Neotropical family Heptapteridae includes 228 species widely distributed in South America. Imparfinis is one of the most diverse genera in this family, with 25 species inhabiting streams from Costa Rica to Argentina. Lack of recent systematic studies and old descriptions have hindered taxonomic advancement and further research in areas such as ecology, cytogenetics, phylogenetics, and evolution. In this study, we conducted the first integrative analysis of molecular and morphological data of Imparfinis from the Upper Parana River basin, revealing the existence of four independent evolutionary lineages, including a newly described species from Goias state.
Article
Fisheries
Filipe Manoel Azevedo, Claudio Henrique Zawadzki, Thatiana Vanessa Soria, Thomaz Mansini Carrenho Fabrin, Alessandra Valeria De Oliveira, Sonia Maria Alves Pinto Prioli, Alberto Jose Prioli
Summary: In a recent expedition, a beautiful and unique species of armoured catfish, Hypostomus variipictus, was discovered in the rio Grande basin in southern Brazil. Genetic analysis confirmed its distinctiveness from other species of the same genus.
JOURNAL OF FISH BIOLOGY
(2021)
Article
Multidisciplinary Sciences
Silvina B. Chemes, Silvia H. Gervasoni, Liliana M. Rossi, Maria De Los Angeles P. Lizama
Summary: This study examined the association between P. lineatus and parasitic helminths in two isolated shallow lakes of the Middle Parana River. It identified two species of gastrointestinal nematodes, with S. asperus having a higher prevalence and mean intensity.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2022)
Article
Fisheries
Renan B. dos Reis, Juliano Ferrer, Weferson J. da Graca
Summary: This study aimed to describe a new species, Cambeva cauim, endemic to the Rio Iguacu basin in Brazil, and to redescribe Cambeva stawiarski using morphological data. Both species are mainly diagnosed by caudal-fin rays, coloration, and other morphometric characters. They, along with eight other congeners, are endemic to the Rio Iguacu basin, a region with high biodiversity impact.
JOURNAL OF FISH BIOLOGY
(2022)
Article
Zoology
Angelica Correa Dias, Claudio Henrique Zawadzki
Summary: The paper presents a redescription of Hypostomus hermanni and the description of a new species of Hypostomus, which is apparently endemic to a specific river basin in Brazil. The two species differ mainly in body coloration, head anatomy, and teeth morphology.
NEOTROPICAL ICHTHYOLOGY
(2021)
Article
Parasitology
Dora Davies, Florencia Liquin, Juan Jose Lauthier, Regina Parraga, Jose Saravia, Carolina Davies, Margarita Ostrowski de Nunez
Summary: This study describes a new species of alloglossiid trematode parasitizing characiform fish in northwestern Argentina and its life cycle. Experimental confirmation of the life cycle, as well as molecular analysis, support the existence of this new species and its relationships with intermediate and definitive hosts.
PARASITOLOGY RESEARCH
(2021)
Article
Parasitology
Luis Augusto Araujo dos Santos Ruffeil, Elane Guerreiro Giese, Raul Henrique da Silva Pinheiro
Summary: This article describes a new species of Spirocamallanus Olsen, 1952 (Camallanidae) that parasitizes Propimelodus eigenmanni, an Amazonian fish. The new species shares characteristics with a group of Neotropical Spirocamallanus that have caudal alae, 3 pairs of precloacal papillae, unequal spicules, and spines on the tail tip of males. The new species differs from other Brazilian congeners based on the number of spirals in the buccal capsule and morphology of the larger spicule.
SYSTEMATIC PARASITOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Gerardo Veroslavsky, Eduardo A. Rossello, Oscar Lopez-Gamundi, Hector de Santa Ana, Mario L. Assine, Josefina Marmisolle, Alexandre de J. Perinotto
Summary: The study conducted geological research on the Chaco-Parana Basin in Argentina, Brazil, Paraguay, and Uruguay, proposing a regional tectonic-sedimentary evolution model for the Late Paleozoic megasequences. It divided the basin fill into three megasequences, revealing marine sedimentation characteristics and potential hydrocarbon resources in the area.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Parasitology
Suellen A. Zatti, Amanda M. R. Marinho, Edson A. Adriano, Antonio A. M. Maia
Summary: A new species of Henneguya parasite infecting Plagioscion squamosissimus in the north of South America was described in this study. The parasite showed a wide geographic distribution in the Amazon basin and exhibited a panmictic population.
ACTA PARASITOLOGICA
(2022)
Article
Biology
Carolina Zabini, Ana Beatriz Furtado-Carvalho, Dermeval Do Carmo, Mario Luis Assine
Summary: This study presents a new occurrence of a discinoid brachiopod in the Iapo and Vila Maria Formations of the Parana Basin, indicating a possible connection between the Soom Shale in the Cape Basin, South Africa, and the Parana Basin during the Early Paleozoic. The new species, Kosoidea australis sp. nov., is characterized by a convexo-plane shell and a marked posterior triangular pedicle opening. The presence of this genus in different locations suggests insights into ancient earth configurations such as the supercontinent Gondwana.
HISTORICAL BIOLOGY
(2021)
Article
Parasitology
Alicia A. Gil de Pertierra, Nathalia J. Arredondo, Roman Kuchta, Ines S. Incorvaia
SYSTEMATIC PARASITOLOGY
(2015)
Article
Parasitology
Nathalia J. Arredondo, Philippe Vieira Alves, Alicia A. Gil de Pertierra
FOLIA PARASITOLOGICA
(2017)
Article
Parasitology
Nathalia J. Arredondo, Alicia A. Gil de Pertierra
FOLIA PARASITOLOGICA
(2010)
Article
Parasitology
Nathalia J. Arredondo, Alicia A. Gil de Pertierra
FOLIA PARASITOLOGICA
(2012)
Article
Parasitology
Nathalia J. Arredondo, Alain de Chambrier, Alicia A. Gil de Pertierra
FOLIA PARASITOLOGICA
(2013)
Article
Zoology
Nathalia J. Arredondo, Alicia A. Gil de Pertierra
REVUE SUISSE DE ZOOLOGIE
(2012)
Article
Parasitology
Margarita C. Ostrowski de Nunez, Nathalia J. Arredondo, Alicia A. Gil de Pertierra
SYSTEMATIC PARASITOLOGY
(2011)
Article
Parasitology
Nathalia J. Arredondo, Margarita C. Ostrowski de Nunez
SYSTEMATIC PARASITOLOGY
(2013)
Article
Parasitology
Martin Miguel Montes, Nathalia J. Arredondo, Paula Marcotegui, Walter Ferrari, Agustin Solari, Sergio Roberto Martorelli
Summary: The discovery of Pomphorhynchus sphaericus in new localities from La Plata River led to a reevaluation of the species using a taxonomic integrative approach. Despite observed morphological differences, molecular analysis confirmed that Pomphorhynchus individuals are conspecific with high phenotypical plasticity. This species is the first South American species to be analyzed at a DNA level, with molecular analysis relating it to P. bulbocolli and P. purhepechus.
PARASITOLOGY RESEARCH
(2021)
Article
Anatomy & Morphology
Leonardo Damian Mutti, Sebastian Franzese, Veronica Adriana Ivanov, Nathalia Jaquelina Arredondo
Summary: This study provides a first-time description of the internal ultrastructure of the scolex and the histochemical composition of the apical glands in two South American proteocephalidean cestodes. Scanning and transmission electron microscopy were employed to observe the tegumental ultrastructure, while histochemical techniques were used to determine the types of gland secretion. Two types of glands were identified in the scolex, and the microtriches pattern for one species was confirmed, while for the other species, it was described for the first time. The presence of sensory receptors and the systematic value of certain characters were also discussed.
JOURNAL OF MORPHOLOGY
(2023)
Article
Zoology
Lorena G. Ailan-choke, Nathalia J. Arredondo, Dora Davies
Summary: During a parasitological survey, a new species of Hedruris genus was discovered in the stomach of Synbranchus marmoratus Bloch from the Parana Guazu River, Parana River basin in Argentina. The new species, Hedruris anguila sp. nov., is morphologically distinct from other Hedruris species. This is the first time that a member of the family Hedruridae has been found parasitizing a species of Synbranchidae.
Article
Parasitology
M. M. Montes, N. J. Arredondo, J. A. Barneche, D. Balcazar, G. Reig Cardarella, S. R. Martorelli, G. Perez-Ponce de Leon
Summary: This paper describes a new parasitic genus called Diegloglossidium maradonai, which was found in the intestine of Hoplosternum littorale in the La Plata River basin. The genus is morphologically similar to members of Alloglossidiidae and Macroderoidiidae, but can be differentiated by certain morphological features. Molecular analysis also confirms its classification in the Alloglossidiidae family. The presence of a deeply lobed ovary is one of its notable characteristics.
JOURNAL OF HELMINTHOLOGY
(2022)
Article
Zoology
Margarita Ostrowski de Nunez, Nathalia J. Arredondo, Alicia A. Gil de Pertierra
REVUE SUISSE DE ZOOLOGIE
(2017)
Article
Parasitology
Alicia A. Gil de Pertierra, Ines S. Incorvaia, Nathalia J. Arredondo
FOLIA PARASITOLOGICA
(2011)