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Fig. 2 in Ultrastructure of the Spermatozoa in the Spider Genus Pimoa: New Evidence for the Monophyly of Pimoidae plus Linyphiidae (Arachnida: Araneae)

Fig. 2. Pimoa altioculata. Male reproductive system, dorsal view. The highly coiled deferent ducts were partly unraveled during dissection. The testes are densely attached to each other.

Fig. 5. A in Ultrastructure of the Spermatozoa in the Spider Genus Pimoa: New Evidence for the Monophyly of Pimoidae plus Linyphiidae (Arachnida: Araneae)

Fig. 5. A. Pimoa altioculata. Cleistospermium in lumen of the deferent duct. B. Pimoa edenticulata. Coiled sperm cell in testis; arrows to the axoneme. C. Pimoa laurae. Coiled sperm cell in lumen of the testis; arrows to axoneme. D–E. Pimoa altioculata. Detail of the axoneme (D, cross section; E, longitudinal section). Abbreviations: AF, acrosomal filament; AV, acrosomal vacuole; Ax, axoneme; CA, centriolar adjunct; dC, distal centriole; Gly, glycogen; Me, membrane cisternae; Mi, mitochondria; N, nucleus; NC, nuclear canal; Sec, secretion; SSh, secretion sheath.

Fig. 4. A–C in Ultrastructure of the Spermatozoa in the Spider Genus Pimoa: New Evidence for the Monophyly of Pimoidae plus Linyphiidae (Arachnida: Araneae)

Fig. 4. A–C. Pimoa altioculata. Coiled sperm cells in lumen of the testis; arrow to electron-lucent part of the acrosomal vacuole (see also fig. 4D). D–E. Pimoa curvata. Cleistospermia in lumen of the deferent duct; arrows to electron-lucent part of the acrosomal vacuole. F. Pimoa laurae. Cleistospermium in lumen of the deferent duct. Abbreviations: AF, acrosomal filament; AV, acrosomal vacuole; Ax, axoneme; CA, centriolar adjunct; dC, distal centriole; Gly, glycogen; pC, proximal centriole; peN, postcentriolar elongation of the nucleus; N, nucleus; NC, nuclear canal; Sec, secretion; SSh, secretion sheath.

Fig. 1. Male habitus, dorsal view. A. Pimoa altioculata. B. Pimoa curvata. C. Pimoa laurae. D in Ultrastructure of the Spermatozoa in the Spider Genus Pimoa: New Evidence for the Monophyly of Pimoidae plus Linyphiidae (Arachnida: Araneae)

Fig. 1. Male habitus, dorsal view. A. Pimoa altioculata. B. Pimoa curvata. C. Pimoa laurae. D. Pimoa edenticulata.

Figs. 19–20. Oonops balanus. 19 in The Male Genital System of Goblin Spiders: Evidence for the Monophyly of Oonopidae (Arachnida: Araneae)

Figs. 19–20. Oonops balanus. 19. Horizontal section of the male opisthosoma. 20. Detail of the testis showing the different stages of spermatogenesis. Figs. 21–22. Stenoonops reductus. 21. Horizontal section of the male opisthosoma. 22. Detail of the testis showing the different stages of spermatogenesis.

Figs. 17–18. Orchestina moaba. 17 in The Male Genital System of Goblin Spiders: Evidence for the Monophyly of Oonopidae (Arachnida: Araneae)

Figs. 17–18. Orchestina moaba. 17. Horizontal section of the male opisthosoma. 18. Detail of the deferent duct showing the mature spermatozoa.

Figs. 23–25. Ascuta media. 23 in The Male Genital System of Goblin Spiders: Evidence for the Monophyly of Oonopidae (Arachnida: Araneae)

Figs. 23–25. Ascuta media. 23. Horizontal section of the male opisthosoma. 24. Horizontal section of the deferent duct showing the densely packed sperm cells. 25. Detail of the testis showing the different stages of spermatogenesis.

Figs. 13–14. Scaphiella hespera. 13 in The Male Genital System of Goblin Spiders: Evidence for the Monophyly of Oonopidae (Arachnida: Araneae)

Figs. 13–14. Scaphiella hespera. 13. Horizontal section of the male opisthosoma. 14. Detail of the testis showing the different stages of spermatogenesis. Figs. 15–16. Lionneta sp. 15. Horizontal section of the male opisthosoma. 16. Detail of the testis showing the different stages of spermatogenesis.

Figs. 9–10. Opopaea recondita. 9 in The Male Genital System of Goblin Spiders: Evidence for the Monophyly of Oonopidae (Arachnida: Araneae)

Figs. 9–10. Opopaea recondita. 9. Horizontal section of the male opisthosoma. 10. Detail of the testis showing the different stages of spermatogenesis. Figs. 11–12. Myrmopopaea sp. 11. Horizontal section of the male opisthosoma. 12. Detail of the testis showing the different stages of spermatogenesis.

Figs. 5–8. Silhouettella loricatula. 5 in The Male Genital System of Goblin Spiders: Evidence for the Monophyly of Oonopidae (Arachnida: Araneae)

Figs. 5–8. Silhouettella loricatula. 5. Horizontal section of the male opisthosoma. 6. Longitudinal section of the male opisthosoma. 7. Detail of the testis showing the different stages of spermatogenesis. 8. Detail of the deferent duct showing the sperm aggregates (transfer form).

Figs. 1–4. Neoxyphinus ogloblini. 1 in The Male Genital System of Goblin Spiders: Evidence for the Monophyly of Oonopidae (Arachnida: Araneae)

Figs. 1–4. Neoxyphinus ogloblini. 1. Dorsal view of the male genital system. 2. Horizontal section of the male opisthosoma. 3. Detail of the testis showing the different stages of spermatogenesis. 4. Detail of the deferent duct showing the sperm aggregates (transfer form, asterisk).

Fig. 14 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 14. Caudal skeletons in Sisoridae: A. Gagata gagata (AMNH 8358, disarticulated specimen), B. Glyptothorax sinensis (AMNH 10265, 51.9 mm SL), C. Nangra nangra (CMK 6369, 39 mm SL), D. Pseudexostoma yunnanensis (NRM 25124, 82 mm SL). Scale bar = 1 mm.

Fig. 11 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 11. Caudal skeletons in Erethistidae: A. Conta conta (UMMZ 208632, 43 mm SL), B. Erethistes pusillus (UMMZ 208697, 39 mm SL). Scale bar = 1 mm.

Fig. 13 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 13. Caudal skeleton of Pseudopimelodus raninus (AMNH 55370, disarticulated late juvenile specimen). Scale bar = 1 mm.

Fig. 10 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 10. Caudal skeletons in Aspredinidae: A. Agmus sp. (AMNH uncat., disarticulated adult specimen), B. Platystacus cotylephorus (USNM 87834, approx. 100 mm SL). Scale bar = 1 mm.

Fig. 7 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 7. Development of the caudal skeleton of Trichogenes longipinnis (Trichomycteridae; MZUSP 80933). A. at 9.1 mm SL, B. at 18.2 mm SL. Stippling represents cartilage, open areas represent membrane (A) or bone (B). Scale bars = 0.5 mm (A) and 1 mm (B).

Fig. 12 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 12. Caudal skeleton of Chiloglanis polypogon (Mochokidae; USNM 304264, 29 mm SL). Scale bar = 1 mm.

Fig. 8 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 8. Caudal skeleton of Liobagrus anguillicaudatus (Amblycipitidae; AMNH 11069, disarticulated adult specimen). Scale bar = 1 mm.

Fig. 6 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 6. Caudal skeleton of juvenile specimen of Gagata melanopterus (Sisoridae; MZUSP 52865, 16.0 mm SL). Stippling represents cartilage, open areas represent bone or notochord (in dotted lines). Scale bar = 1 mm.

Fig. 5 in The Second Ural Centrum in Siluriformes and Its Implication for the Monophyly of Superfamily Sisoroidea (Teleostei, Ostariophysi)

Fig. 5. Ontogenetic changes in the second ural centrum of Aspredinidae. A. Pterobunocephalus sp. (MZUSP 57208, approx. 5.5 mm SL), late embryo inside eggshell, B. Pterobunocephalus sp. (MZUSP uncat., 63.0 mm SL), adult. Heavy stippling represents cartilage, light stipling represents a thin mineralized layer, and open areas represent notochord (in A) or bone (in B). Scale bars = 0.5 mm (A) and 1 mm (B).