FIGURE 4 in A revision of the subgenus Eurycercus (Teretifrons) Frey, 1975 (Crustacea: Cladocera) in the Holarctic with description of a new species from Russian Arctic

FIGURE 4. Eurycercus nigracanthus, parthenogenetic female from Round Pond, N of St. Johnes, Newfoundland, Canada. A, lateral view. B, dorsal view. C, anterior view. D, head, lateral view. E–F, head pores. G–I, armature of antero-ventral, ventral and posterior valve margin. Scale bar denotes 1 mm for A–D, 0.1 mm for E–I.