TABLE I. Main morphological difference between Hyalella jaboticabensis n in Description of one species of freshwater amphipod Hyalella (Crustacea, Peracarida, Hyalellidae) from the northwest region of the state of Rio Grande do Sul, Southern Brazil

TABLE I. Main morphological difference between Hyalella jaboticabensis n. sp. and other Hyalella species from nearby areas in the northwest region of the state of Rio Grande do Sul, southern Brazil.
SpeciesSetae in the inner margin of maxilla 2Number of articles of antenna 1Number of articles of antenna 2Sternal gills tubularNumber of setae in the inner face of propodus of gnathopod 1Curved setae in inner ramus of uropod 1Number of cuspidate setae on peduncle and ramus of uropod 3, respectivelyTelson (shape and number of setae)Hyalella jaboticabensis n. sp. (1)Two papposerrate setae, being one of them stronger and longer11–1315–172–79 or 10 serrate setae and 4 to 6 simple setaePresent6 and 2 or 3Apically squared, bearing six to eight short and long cuspidate setae with accessory setaHyalella imbya Rodrigues & Bueno, 2012 (2)Two long papposerrate setae18–2314–163–77 serrate setaePresent1 and 5Apically rounded with two long simple apical setaeHyalella gauchensis Streck & Castiglioni, 2017 (3)Two papposerrate setae, being one of them stronger and longer11152–75 long serrate setae and 9–10 short serrate setaePresent6 and 1Apically rounded, as wide as long, with six cuspidate setae apically distributed in three clusters of two setae eachHyalella georginae Streck & Castiglioni, 2017 (3)Two robust papposerrate setae15162–79 serrate setaePresent9 and 1Apically rounded, as wide as long, with seven apical cuspidate setae with an accessory seta distributed in two clusters (two setae and other side five four setae)Hyalella palmeirensis Streck-Marx & Castiglioni, 2020 (4)One strong papposerrate setae11–1210–123–75 serrate setaePresent3 and 1As long as wide, with two long simple setaeHyalella longipropodus Limberger, Graichen & Castiglioni, 2021 (5)Two papposerrate setae, being one of them stronger and longer11–1219–202–77 serrate setaeAbsent7 and 1Apically rounded, with two long simple setae and two short cuspidate setae with accessory seta on distal marginHyalella luciae Limberger, Santos & Castiglioni, 2022 (6)Two stronger papposerrate setae, being one of them longer11–1214–172–79 serrate setae and some small simple and triangular setaePresent11–12 and 1As long as wide, apically rounded with fifteen cuspidate setae with accessory seta and four simple setae on distal margin
TABLE I. Main morphological difference between Hyalella jaboticabensis n. sp. and other Hyalella species from nearby areas in the northwest region of the state of Rio Grande do Sul, southern Brazil.
Note: References: (1) in this paper; (2) Rodrigues et al. (2012); (3) Streck & Castiglioni (2017); (4) Streck-Marx & Castiglioni (2020); (5) Limberger et al. (2021); (6) Limberger et al. (2022).