Browsing by Autor "Fabrizio Scarabino"

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A new species of the Phalloceros harpagos species complex (Cyprinodontiformes: Poeciliidae) from the middle and lower Uruguay River floodplains
(Fundación Miguel Lillo, 2025) Wilson S. Serra; Fabrizio Scarabino; Noelia Gobel; Gabriel Laufer
Phalloceros mimbi sp. nov. is described from specimens collected in the floodplains of the middle and lower Uruguay River in Uruguay (Río Negro and Salto Departments) and Argentina (Entre Ríos Province). This species belongs to the P. harpagos species complex and is diagnosed by the following unique combination of characters: 1) presence of a symmetric hood-like structure located immediately anterior to the urogenital papilla in females, 2) absence of large papillae at the mandibular symphysis of large adult females, 3) possession of well-developed hooks positioned in distal portion of gonopodial appendices of males and4) lateral spot usually present in both sexes. To date, P. mimbi has not been found coexisting in sympatry with other Phalloceros species. The geographically closest species is P. caudimaculatus, who differs from P. mimbi by the absence of hooks in gonopodial appendix in males. Two of the three known populations of P. mimbi are relatively protected from the main threats to the species. However, conservation initiatives should consider its presence and ensure that it receives the necessary attention; considering that its global distribution occupies less than 200.000 km2 and its occurrence area represents less than 10% of the national territory it must be considered a priority for conservation and an Threatened Species for the species list of Sistema Nacional de Áreas Protegidas (SNAP) of Uruguay.
Characidium serrano Buckup & Reis, 1997 (Characiformes, Crenuchidae): insights into phylogenetic relationships, and comments on distribution
(Fundación Miguel Lillo, 2025) Wilson S. Serra; Fabrizio Scarabino; Víctor Ezequiel Mettola; Martín Miguel Montes; Guillermo Terán; Melisa Moncada; Graciela Sanguinetti; Alejandro Duarte; Matías García
Characidium is the most diverse genus within the family Crenuchidae, with a total of 88 valid species, although there is evidence that it is probably a polyphyletic group. Recent expeditions to northern Uruguay revealed the first records of Characidium serrano Buckup & Reis, 1997, extending its distribution in about 300 km to the south and allowingto consider it as an endangered species for Uruguay, considering its restricted distribution in the country. Different phylogenetic reconstructions and comparisons based on COI (Model-based analysis, Parsimony analysis and Evolutionary Divergence between sequences) of new sequences with those previously published indicate: 1) a closer phylogenetic relationship of C. serrano with C. clistenesi or alternatively with (C. rachovii + C. orientale) than with C. pterostictum and 2) non-coincident topologies that in all cases suggest the non-monophyly of Characidium.The analyzed sequences of the genus Characidium formed 9 main stables groups that are obtained in each of the analyzes carried out, which were also recovered in studies previously performed by other authors, but with general topologies not coincident and poorly supported in their basal nodes.
FIRST RECORD OF ‘Hemiancistrus’ punctulatus CARDOZO & MALABARBA, 1999 FOR URUGUAY (SILURIFORMES: LORICARIIDAE)
(2020) Wilson S. Serra; Fabrizio Scarabino; Sabina Wlodek; Giovanni Minervino Furtado; Andrés Balao
A recent expedition to lower Yaguarón river basin in northeastern Uruguay, revealed the presence of the loricariid catfish ‘Hemiancistrus’ punctulatus Cardozo & Malabarba, 1999, which represents the first record of this species for the country. We propose it as an endangered species for Uruguay considering its restricted distribution.
Management and research on plastic debris in Uruguayan Aquatic Systems: update and perspectives
(2015) Juan Pablo Lozoya; Alvar Carranza; Javier Lenzi; Emanuel Machín; Franco Teixeira de Mello; Silvana Guerrero González; Daniel Hernández; Gissell Lacerot; Gastón Martínez; Fabrizio Scarabino
Synthetic plastics have become an indispensable component of modern life, and the amount of plastics disposal has increased dramatically as a result. With human population increasing, it is expected that the prevalence of plastic debris in the environment will also increase, unless sustainable daily habits are incorporated, waste management improved, and new alternative materials are discovered and popularized. To date, several reports show negative effects of plastic debris on marine and freshwater fauna (e.g. invertebrates, birds, turtles, marine mammals).