Abstract
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.
Highlights
The genus Hyalella Smith, 1874 consists of species restricted to the Nearctic and Neotropical biogeographical regions, and it occurs from Patagonia to the southern region of Canada (Bueno et al 2014)
There are 12 known species occurring in Rio Grande do Sul (Streck-Marx & Castiglioni 2019): H. curvispina Shoemaker, 1942; H. pampena Cavalieri, 1968; H. montenegrinae Bond-Buckup & Araujo, 1998; H. pseudoazteca González & Watling, 2003; H. castroi González, Bond-Buckup & Araujo, 2006; H. pleoacuta González, Bond-Buckup & Araujo, 2006; H. bonariensis Bond-Buckup, Araujo & Santos, 2008; H. imbya Rodrigues & Bueno, 2012; H. kaingang Araujo & Cardoso, 2013; H. gauchensis Streck & Castiglioni, 2017; H. georginae Streck & Castiglioni, 2017; and H. palmeirensis Streck-Marx & Castiglioni, 2019
This paper aims to extend the distribution of the genus Hyalella in the Southern Brazil, with the description of two new species from the central region of Santa Catarina State
Summary
The genus Hyalella Smith, 1874 consists of species restricted to the Nearctic and Neotropical biogeographical regions, and it occurs from Patagonia to the southern region of Canada (Bueno et al 2014). There are 76 species described (Bueno et al 2019; Streck-Marx & Castiglioni 2019), 28 of which are from Brazil (Rodrigues et al 2014; Streck et al 2017; Bastos-Pereira et al 2018; Peralta & Isa Miranda 2019; Streck-Marx & Castiglioni 2019). Close, but found in Argentina, there is H. misionensis Colla & Cesar, 2015; this species is included in the taxonomical remarks and discussion sections
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