First record of the genus Hyalella (Amphipoda: Hyalellidae) from Santa Catarina State, Brazil, with description of two new species

Abstract

The amphipod HyalellaSmith, 1874 is exclusive to the Americas, and the South region of Brazil presents the greatest diversity of the genus. This paper presents two species of Hyalella from Santa Catarina state, Brazil. A new species from the municipality of Palmeira is characterized by oval eyes, absence of flanges, epimeral plates not accuminated, presence of three lateral pappose setae on article 4 in antenna 2, absence of plumose setae in the maxilliped, presence of comb-scales and absence of serrate setae in the gnathopods, presence of curved seta on the inner ramus of the uropod 1 and absence of lateral setae on the telson. A new species from Rio das Antas municipality main characteristics are absence of flanges, epimeral plates accuminated, absence of plumose setae and distal nail in the maxilliped, presence of comb-scales and absence of serrate setae in gnathopods, presence of curved seta on the inner ramus of the uropod 1 and absence of lateral setae on the telson. Here we expand the distribution and increase the morphological and taxonomic knowledge of the genus.

Genus Hyalella (Amphipoda: Hyalellidae) in Humid Pampas: molecular diversity and a provisional new species

“…Hyalella is a genus of epigean freshwater amphipods of America (Baldinger 2004) and is the only one present in South America (Reis et al 2020). Members of this genus are found in various freshwater environments such as lakes, ponds, and streams, clinging to vegetation and burrowing in bottom sediments (da Silva Castiglioni and ditions and pollution; in North America, Hyalella azteca is a standard organism in bioassays (Casset et al 2001).…”

New records of the troglobitic Hyalella veredae Cardoso & Bueno, 2014 (Crustacea, Amphipoda, Hyalellidae) from Minas Gerais caves, southeast Brazil, with notes on its natural history

“…The family Hyalellidae is composed only of Hyalella Smith, 1874, and it probably originated in South America (Väinölä et al 2008). The genus has a distribution restricted to Nearctic and Neotropical regions (Väinölä et al 2008), and 83 species have been described (Horton et al 2020), of which 30 occur in Brazil (Reis et al 2020).…”