A revised and updated checklist of Monogononta rotifers from Argentina

Abstract

Abstract:We provide here a checklist of species of Monogononta rotifers from lentic and lotic environments in Argentina, 25 years after the initial catalogue compiled by Susana B. José de Paggi. This new inventory now includes the reports on rotifers documented in 93 studies produced after 1990. The majority of the investigations were carried out in three of the 24 Argentine provinces. In addition, the presence of 13 species in samples from three water bodies within Buenos Aires province are now cited here for the first time in Argentina. In this updated checklist, a total of 351 species are catalogued, the majority being representatives of the Lecanidae, Brachionidae, and Lepadellidae.

Occurrence of Keratella cochlearis (Gosse, 1851) (Rotifera, Monogononta) on San Cristóbal Island, Galápagos Archipelago, Ecuador

“…Our Galápagos specimens are morphologically indistinguishable from the typical variant of Keratella cochlearis, which is considered cosmopolitan (Segers and De Smet 2008) and is common in continental Ecuador (Koste andBöttger 1989, 1992) and other regions of the Neotropics (Koste and José de Paggi 1982, Turner 1988, José de Paggi and Koste 1995, Vásquez et al 1998, Garrafoni & Lourenço 2012, Ferrando and Claps 2016.…”

Brachionus rotundiformis Tschugunoff, 1921 from the Brachionus plicatilis species complex (Rotifera: Monogononta): A new record from Galápagos Archipelago, Ecuador

“…The B. plicatilis species complex is considered cosmopolitan (Serra & Fontaneto, 2017) and is found in brackish and estuarine habitats of continental Ecuador (De Cruz, 1998;Torres & Palacios, 2007) and other regions of the Neotropics (Koste & José de Paggi, 1982;José de Paggi & Koste, 1995;Vásquez et al, 1998;Garraffoni & Lourenço, 2012;Ferrando & Claps, 2016). Particularly in the Neotropical zone, the species B. rotundiformis has been reported only from Mexico (Sarma et al, 2000), Brazil (Garraffoni & Lourenço, 2012) and Argentina (Ferrando & Claps, 2016).…”

“…Brachionus plicatilis Müller, 1786 is one of the best known monogonont rotifers. This taxon has been extensively studied, owing to its successful use in aquaculture (Lubzens, 1987;Lubzens et al, 2001) and ecotoxicology (Kostopoulou et al, 2012;Rico-Martínez et al, 2017;Won et al, 2017) and presently constitutes a model organism in ecological and evolutionary studies (Declerck & Papakostas, 2017;Serra & Fontaneto, 2017).…”

“…Subsequently, more size-forms were recognized (Yúfera, 2001) and three clades that corresponded to three size groups were suggested, namely the Large (L), Small medium (SM) and Small small (SS) clades (Ciros-Pérez et al, 2001;Mills et al, 2017). The advent of low-cost DNA sequencing methodologies, and critically, the application of molecular-based species delimitation techniques (e.g., Fontaneto et al, 2015), allowed the recognition of more species at the B. plicatilis species complex. Currently, besides B. plicatilis s.s. and B. rotundiformis, the described species are Brachionus ibericus Ciros-Pérez, Gómez & Serra, 2001 and Brachionus koreanus, Hwang, Dahms, Park & Lee, 2013as SM morphotypes, and Brachionus manjavacas Fontaneto, Giordani, Melone & Serra, 2007and Brachionus asplanchnoidis Charin, 1947as L-morphotype (Ciros-Pérez et al, 2001Fontaneto et al, 2007;Hwang et al, 2013;Michaloudi et al, 2017;Mills et al, 2017).…”

Influence of temperature and conductivity on the life-history characteristics of a pampean strain of Brachionus plicatilis

“…Moreover, Yin and Zhao (2008) concluded from their experiments that salinity had a notable effect on the population increase of B. plicatilis, though that influence was clone-specific. In Argentina, the species has been recorded in many localities (Ferrando and Claps 2016); but a high abundance has been noted throughout the annual cycle in temporary and permanent saline shallow lakes of the La Pampa province (Echaniz et al 2006, 2013, Vignatti et al 2012, and also in lotic environments such as the shallow lakes of the Santa Fe province, those being characterized by conductivities between 2.5 and 7.0 mS.cm -1 depending on associated saline river discharges (José de Paggi and Paggi 1998, José de Paggi and Devercelli 2011). In the Buenos Aires province, B. plicatilis is spatiotemporally predominant in the Salado River basin during extreme droughts or with salinities above 3.0 mS.cm -1 during the summer or winter periods (at temperatures lower than 12 °C) promoting a concurrent general decrease in the specific richness of zooplankton (Gabellone et al 2013(Gabellone et al , 2014, but the species has also been recorded in low densities at conductivities of less than 2.0 mS.cm -1 and temperatures ranging from 7 to 30 °C (Claps et al 2009).…”