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FIGURE 7 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 7. Eurycercus cf. nigracanthus, parthenogenetic female from tundra pond TP-3, Churchill, Manitoba, Canada. A, postabdomen. B, its distal portion. C, postabdominal claw. D, antenna I. E, antenna II. F, proximal segments of exopod. G, limb I. H, IDL of limb I. I, limb II. J, distal armature of its gnathobase. Scale bar denotes 1 mm for A; 0.1 mm for B–J.

FIGURE 6 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 6. Eurycercus cf. nigracanthus, parthenogenetic female from tundra pond TP-3, Churchill, Manitoba, Canada. A–B, lateral view. C, head, lateral view. D, head shield. E, head pores. Scale bar denotes 1 mm.

FIGURE 11 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 11. Eurycercus chernovi sp. nov., limbs of parthenogenetic female from a lake about 150 m in diameter, north of settlement of Ust' Tareya, Taimyr Autonomous Area, Krasnoyarsk Territory, Russia (type locality). A, limb III. B, distal armature of its gnathobase. C, limb IV. D, distal armature of its gnathobase. E, limb V, F, its gnathobase. G, limb VI. Scale bar denotes 0.1 mm.

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.

FIGURE 3 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 3. Eurycercus glacialis, thoracic limbs of parthenogenetic female from a shallow pond in sitka spruce temperate rainforest, Kodiak Island, Alaska, U.S.A. A, limb II. B, distal armature of its gnathobase. C, limb III. D, distal armature of its gnathobase. E, limb IV. F, distal armature of its gnathobase. G, limb V. H, its gnathobase. I, limb VI. Scale bar denotes 1 mm for A, C, I; 0.1 mm for B, D–H.

FIGURE 1. Eurycercus glacialis, parthenogenetic female from a 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 1. Eurycercus glacialis, parthenogenetic female from a shallow pond in sitka spruce temperate rainforest, Kodiak Island, Alaska, U.S.A. A, lateral view. B, anterior view. C, dorsal view. D, head, lateral view. E, head shield. F, head pores. G, labrum, ventral view. Scale bar denotes 1 mm for A–E, G; 0.1 mm for F.

FIGURE 2. Eurycercus glacialis, parthenogenetic female from a 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 2. Eurycercus glacialis, parthenogenetic female from a shallow pond in sitka spruce temperate rainforest, Kodiak Island, Alaska, U.S.A. A, postabdomen. B, its distal portion. C, dorso-distal portion. D, postabdomen basal portion. E, antenna I. F, antenna II. G, limb I. H–I, IDL of limb I. Scale bar denotes 1 mm for A, F–G; 0.1 mm for B–E, H–I.

FIGURE 5 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 5. Eurycercus nigracanthus, parthenogenetic female from Round Pond, N of St. Johnes, Newfoundland, Canada. A, postabdomen. B, its distal portion. C, its basal portion. D, antenna I. E, antenna II. F, IDL of limb I. Scale bar denotes 1 mm for A; 0.1 mm for B–F.

FIGURE 12. Eurycercus chernovi, adult male from a 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 12. Eurycercus chernovi, adult male from a small lake at the margin of a polygonal bog, Taimyr Autonomous Area, Krasnoyarsk Territory, Russia. A, lateral view. B, head. C, postabdomen. D, its distal portion. E, antenna I. F, limb I. G, its distal portion. Scale bar denotes 1 mm for A–B; 0.1 mm for C–G.

FIGURE 13 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 13. Dorsal head pores of Eurycercus (Teretifrons) in lateral view. A, E. (T.) glacialis. B, E. (T.) nigracanthus. C, E. (T.) chernovi sp. nov. Not to scale.

FIGURES 32–35. Habitus, dorsal view. 32–33 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 32–35. Habitus, dorsal view. 32–33, Pardosa logunovi sp. nov. ♂ (32) Ƥ (33), both from Tuva: Kargy river. 34–35, P. tesquorum (Odenwall) ♂ (34) Ƥ (35), both from Buryatia: Barguzin valley. Scale line 1 mm.

FIGURES 25–28 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 25–28. Epigynes in ventral view. 25, Pardosa eskovi sp. nov. (Yakutia: Suntar). 26, P. mulaiki Gertsch (from Saskatchewan: Hanley). 27, P. tesquorumoides Song & Yu (from Sichuan: Hongyuan Co.). 28, P. z y u z i n i sp. nov. (from type locality). Scale line (applies to all) 300 Μm.

FIGURES 15–18 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 15–18. Pardosa eskovi sp. nov., male (from Yakutia: Zhigansk), left palp. 15–17, terminal part of bulbus in ventral (15), retrolateral (16), and frontal (17) view. 18, tegulum with tegular apophysis in ventral view. ba.pr, basal process of palea; cond, conductor; emb, embolus; pal, palea; stg, subtegulum; tg, tegulum; tg.ap, tegular apophysis; tl.ap, terminal apophysis of palea. Scale line (applies to all) 300 Μm.

FIGURES 29–31 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 29–31. Epigynes in dorsal view. 29, Pardosa eskovi sp. nov. (from Yakutia: Suntar). 30, P. mulaiki Gertsch (from Saskatchewan: Hanley). 31, P. z y u z i n i sp. nov. (from type locality). cd, copulatory duct; sp, spermatheca. Scale line (applies to all) 300 Μm.

FIGURES 48–51 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 48–51. Terminal part (48, 50) and tegulum with tegular apophysis (49, 51) of left bulbus. 48–49, Pardosa logunovi sp. nov. from Tuva. 50–51, P. tesquorum (Odenwall) from Yakutia. ba.pr, basal process of palea; cond, conductor; emb, embolus; pal, palea; stg, subtegulum; tg, tegulum; tg.ap, tegular apophysis; tl.ap, terminal apophysis of palea; arrow, points at basal process of palea, indicating differences in curvature between the two species. Scale line (applies to all) 300 Μm.

FIGURES 9–14 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 9–14. Pardosa eskovi sp. nov. 9, left male palp, ventral view. 10, left tegular apophysis. 11–13, terminal part of left bulbus in ventral (11), retrolateral (12) and frontal view (13). 14, epigyne, ventral view. Scale lines 0.1 mm.

FIGURES 44–47 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 44–47. Terminal part of left bulbus in ventral (44, 46) and frontal (45, 47) views. 44–45, Pardosa logunovi sp. nov. from Tuva. 46–47, P. tesquorum (Odenwall) from Yakutia. ba.pr, basal process of palea; cond, conductor; emb, embolus; pal, palea; tl.ap, terminal apophysis of palea. Scale line (applies to all) 300 m.

FIGURES 77 – 82 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 77 – 82. Pardosa tesquorum (Odenwall) (male and female from Yukon Territory: Lake Kluane). 77, left bulbus. 78, embolus of left palp, frontal view. 79, left terminal part, ventral view. 80, left male palp (patella, tibia and cymbium), dorsal view. 81, 82, epigyne in ventral (81) and dorsal (82) view. Scale lines 0.1 mm.

FIGURES 94–101 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 94–101. Pardosa zyuzini sp. nov. 94, left bulbus, ventral view. 95–96, left terminal part of bulbus in ventral (95) and retrolateral (96) view. 97, left male palp (patella, tibia and cymbium), dorsal view. 98, embolus of left palp, frontal view. 99, male metatarsus I. 100–101, epigyne in ventral (100) and dorsal (101) view. Scale lines 0.1 mm (94–98, 100–102), 0.5 mm (99).

FIGURES 73–76 in Studies on species of Holarctic Pardosa groups (Araneae, Lycosidae). VII. The Pardosa tesquorum group

FIGURES 73–76. Pardosa mulaiki Gertsch, male (from Saskatchewan: Hanley), left palp. 73–75, terminal part of bulbus in ventral (73), retrolateral (74), and frontal (75) view. 76, tegulum with tegular apophysis in ventral view. ba.pr, basal process of palea; cond, conductor; emb, embolus; pal, palea; stg, subtegulum; tg, tegulum; tg.ap, tegular apophysis; tl.ap, terminal apophysis of palea. Scale line (applies to all) 300 Μm.