Cyclops, Muller, 1776

Connolly, Joseph K., Marshall, Christopher C., Hudson, Patrick L., Watkins, James M., Scofield, Anne E. & Rudstam, Lars G., 2022, Reevaluation of the genus Cyclops Müller, 1776 (Cyclopoida: Cyclopidae) in the Laurentian Great Lakes basin: first report of the Palearctic species Cyclops divergens Lindberg, 1936 from Lake Erie and documentation of Cyclops sibiricus Lindberg, 1949 in the St. Marys River, Zootaxa 5182 (2), pp. 183-195 : 191-192

publication ID	https://doi.org/ 10.11646/zootaxa.5182.2.5
publication LSID	lsid:zoobank.org:pub:50BD0F07-F445-4AFE-BA85-2546FDAE52B6
DOI	https://doi.org/10.5281/zenodo.7053945
persistent identifier	https://treatment.plazi.org/id/7752315E-FFD4-8C6C-FF09-F9A5FA7FFE26
treatment provided by	Plazi
scientific name	Cyclops
status

Treatment

Key to Cyclops species of the Laurentian Great Lakes:

1a. Long setules present on proximalmost seta of mxl palp ( Fig. 5b View FIGURE 5 )................................................ 2

1b. Long setules absent on proximalmost seta of mxl palp ( Fig. 2b View FIGURE 2 )................................................. 3

2. A1 extending beyond cephalothorax (female) and A1 first segment densely pitted ( Fig. 3b View FIGURE 3 ), surface of mxl palp ornamented with large spinules ( Fig. 5b View FIGURE 5 ), mxp syncoxopodite with short membranous element featuring prominent distal hook ( Fig. 4b View FIGURE 4 ) and transverse row of small spinules, P1 basipodite medial spine with heteronomous setulation ( Fig. 4c View FIGURE 4 ), P3 coupler unornamented, P4 coupler ornamented with horizontal row of long hairs ( Fig. 5c View FIGURE 5 ), P4 coxopodite ornamented with spinules at positions A, C, D, and E ( Fig. 4d View FIGURE 4 ), P4 coxopodite setae extending beyond medial margin of the basipodite ( Fig. 4e View FIGURE 4 ), P5 basal segment lacking ornamentation................................................................. C. divergens Lindberg, 1936

3a. P4 coxopodite setae unmodified ( Fig. 2f View FIGURE 2 ).................................................................. 4

3b. P4 coxopodite setae proximally swollen................................................................ 5

4. A1not extending beyond cephalothorax (female) andA1 first segment lacking pits ( Fig. 1b View FIGURE 1 ), surface of the mxl palp unornamented or ornamented with only tiny spinules ( Fig. 2b View FIGURE 2 ), mxp syncoxopodite with long membranous element featuring somewhat club shaped distal terminus ( Fig. 2c View FIGURE 2 ) and transverse row of small spinules, P1 basipodite medial spine proximal margin bare ( Fig. 2d View FIGURE 2 ), P3 and P4 coupler ornamented with horizontal row of long hairs, P4 coxopodite ornamented with spinules at positions A, B, C, D, and E ( Fig. 2e View FIGURE 2 ), P4 coxopodite setae not extending beyond medial margin of the basipodite ( Fig. 2f View FIGURE 2 ), P5 basal segment ornamented with spinules near insertion of lateral seta.................................... C. sibiricus Lindberg, 1949

5. A1 extending beyond cephalothorax (female) and A1 first segment lacking pits, surface of the mxl palp ornamented with small spinules, mxp syncoxopodite with short membranous element lacking distal hook or club and with oblique row of long spinules, P4 coupler unornamented, P4 coxopodite ornamented with spinules at positions A, B, C, D, and occasionally F, P4 coxopodite setae extending beyond medial margin of the basipodite, P5 basal segment unornamented............ C. scutifer Sars, 1863