Lycaea, Dana, 1852

Tump, Marloes, Vonk, Ronald, Burridge, Alice K., Beentjes, Kevin K., Goetze, Erica & Peijnenburg, Katja T. C. A., 2025, Genetic diversity of hyperiid amphipods along a meridional transect in the Atlantic Ocean, Contributions to Zoology 94 (3), pp. 261-291 : 277-278

Genus Lycaea

A total of 18 specimens were sequenced from the genus Lycaea , of which 13 were morphologically identified as L. pulex Marion, 1874 , one was identified as L. serrata Claus, 1879 , and four specimens were named Lycaea sp. 1 ( Burridge et al., 2017; fig.3 ). Lycaea pulex was sampled from 12 °N to 34 °S and appears to have a broad latitudinal distribution in the Atlantic Ocean ( table 1; fig. 3 ). This species was composed of four mitochondrial clades, designated here as Lycaea pulex A, B, C and D. Lycaea pulex A (N = 7) was restricted to tropical waters and the southern edge of the North Atlantic Gyre (NATR and WTRA). Lycaea pulex B (N = 3) and L. pulex C (N = 2) were sympatric and sampled at a single station in the transition zone between the South

CONTRIBUTIONS TO ZOOLOGY 94 (2025) 261–291

Atlantic Gyre and the South subtropical convergence (SSTC), and L. pulex D (N = 1) was sampled only once in the equatorial upwelling region (WTRA; fig. 3 ). The genetic distance between these four clades ranged from 19% to 32%, and within clades from 0 to 2% (table S4).

Figures

FIGURE 3 Phylogenetic analysis of the genus Lycaea. A) Maximum likelihood tree based on CO1 sequences showing relationships between clades supported by ABGD analyses: Lycaea pulex A, Lycaea pulex B, Lycaea pulex C, Lycaea pulex D, Lycaea serrata and Lycaea sp.1.ML bootstrap values>80% are indicated with an asterisk (*). B) Lateral views of Lycaea pulex A, Lycaea pulex B, Lycaea pulex C, and Lycaea pulex D (scale bar is 1 mm). C) Map showing collection locations, with Longhurst oceanic provinces marked by symbols and abbreviations (see also fig.1 and table 1).