Bythotrephes lilljeborgi Korovchinsky, 2018

Korovchinsky, Nikolai M., 2020, Description of a new species in the genus Bythotrephes Leydig, 1860 (Crustacea Cladocera: Onychopoda), supplements to selected species, and concluding remarks on the genus, Zootaxa 4789 (2), pp. 441-465 : 451-452

Bythotrephes lilljeborgi Korovchinsky, 2018

Material examined: Sweden, Halland: 1) samples SMNH N158351 and N158354 labeled “Sweden, Halland, Kragared, Ålsjön, July 1871, Smell”, 2 ad and 3 juv. and 8 ad, respectively .

Remarks. The morphometric data on the species are shown in Table 2. Generally, these and other features ( Fig. 5 A-lower, C–F) were mostly similar to those ones specified in the original species description (see Korovchinsky 2018).

Previously, this rare species originally described from the Scandinavian Peninsula, was known in the south of Norway and in the southernmost Sweden (Skåne). Now it has been recorded in the neighboring Swedish province, Halland.

Figures

FIGURE 5. Bythotrephes cederströmii, females of first generation hatched from resting egg, Lake Imandra (Kola Peninsula, Russia) (A-upper, B); B. lilljeborgi, females, Ålsjön (Kragered, Halland, Sweden) (A-lower, C–F). A, distal segments of tl I. B, postabdomen and caudal process. C–F, claws of postabdomen and caudal process.