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FIGURES 10–15. Cabecar serratus. Figs. 10–13 mature larva. 10 in Cabecar serratus, a new genus and species of leptohyphid mayfly from Central America, and description of the imaginal stages of Tricorythodes sordidus Allen (Ephemeroptera: Leptohyphidae)

FIGURES 10–15. Cabecar serratus. Figs. 10–13 mature larva. 10, metaleg: dorsal view; 11, metaleg seta. 12, metaclaw; 13, abdominal gill 2 (operculate gill). Figs. 14–15 male imago. Fig. 14, for wing; Fig. 15, male genitalia, ventral view. Figure 16. Tricorythodes sordidus Allen, male genitalia, ventral view.

FIGURES 25–31 in Revision of Madeiran mayflies (Insecta, Ephemeroptera)

FIGURES 25–31. Larval structures of Baetis enigmaticus: 25, foreleg. 26, tarsal claw. 27, distal margin of abdominal tergum IV. 28, gill IV. 29, paraproct. 30, median caudal filament. 31, detail of antenna (scape and pedicel).

FIGURES 18–24 in Revision of Madeiran mayflies (Insecta, Ephemeroptera)

FIGURES 18–24. Larval structures of Baetis enigmaticus: 18, labrum (left: ventral; right: dorsal). 19, hypopharynx. 20, right mandible. 21, left mandible. 22, right maxilla. 23, tip of maxillary palp. 24, labium.

FIGURES 7–13 in Revision of Madeiran mayflies (Insecta, Ephemeroptera)

FIGURES 7–13. Larval structures of Cloeon peregrinator (except fig. 9: Cloeon dipterum): 7, foreleg. 8, tarsal claw (Cloeon peregrinator). 9, tarsal claw (Cloeon dipterum). 10, distal margin of abdominal tergum IV. 11, lateral margin of abdominal segments VII–IX. 12, gill IV. 13, paraproct.

FIGURES 1–6 in Revision of Madeiran mayflies (Insecta, Ephemeroptera)

FIGURES 1–6. Larval structures of Cloeon peregrinator: 1, labrum (left: ventral; right: dorsal). 2, hypopharynx. 3, right mandible. 4, left mandible. 5, right maxilla. 6, labium.

FIGURES 39–40. Nonnullidens niger. 39 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 39–40. Nonnullidens niger. 39, genital of male imago, ventral view; 40, posterior margin of sternum IX of male larva of last instar and larval protopenis, dorsal view.

FIGURES 23–28 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 23–28. Nonnullidens depapricus, male larva (holotype). 23–26, tergalii of I, IV, V and VII pairs; 27, hind protopteron (developing subimaginal wing shown by interrupted line); 28, protopenis (developing subimaginal penis shown by interrupted line).

FIGURES 51–53 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 51–53. Subimaginal exuviae of mesonotum. 51, Nonnullidens variegatus, female; 52, Nonnullidens niger, male (holotype); Nonnullidens reductus, male (holotype). Abbreviations: a, pigmented area antediad of mesonotal suture; p, area posteriad of mesonotal suture.

FIGURES 41–44. Nonnullidens reductus, larva. 41 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 41–44. Nonnullidens reductus, larva. 41, labrum, dorsal view (setae of transverse rows not shown, their bases shown as rings and levels of their apices shown by interrupted lines); 42, left mandible; 43, 44, tergalii of I and II pairs (ventral lamella turned back) (43, 44, holotype).

FIGURES 1–3. Nonnullidens variegatus, larva. 1 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 1–3. Nonnullidens variegatus, larva. 1, labrum, dorsal view (setae of transverse rows not shown, their bases shown as dots and levels of their apices shown by interrupted lines); 2, pretarsal claw; 3, left mandible (2, holotype).

FIGURES 17–22. Nonnullidens variegatus. 17, 20 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 17–22. Nonnullidens variegatus. 17, 20, apex of penis of male imago, ventral view; 18, 21, genitals of male imago, ventral view; 19, exuviae of subimaginal gonostylus; 22, posterior margin of sternum IX of male larva of last instar and larval protopenis (19–22, holotype).

FIGURES 32–38 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 32–38. Nonnullidens niger (holotype). 32, 33 tergalii I and II pairs (ventral lamella turned back); 34, tergalius of VII pair; 35, femur of middle leg (hypodermal coloration not shown); 36, abdominal tergum V of male imago, spread on slide; 37, hind protopteron of larva; 38, hind wing of male imago.

FIGURES 29–31 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 29–31. Nonnullidens depapricus, male larva (holotype). 29, fore leg; 30, middle leg; 31, hind leg.

FIGURES 49–50 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 49–50. Genitals of male imagoes, ventral view. 49, Nonnullidens niger (holotype); 50, Nonnullidens reductus (nonreared specimen).

FIGURES 4–10. Nonnullidens variegatus, larva. 4–6 in Mayflies of the genus Nonnullidens Grant & Peters 1993 (Ephemeroptera: Leptophlebiidae) from New Guinea

FIGURES 4–10. Nonnullidens variegatus, larva. 4–6, tergalii of I, II and VII pairs (ventral lamella turned back); 7–9, outline and hypodermal coloration of fore, middle and hind legs (setae not shown); 10, femur of middle leg (hypodermal coloration not shown) (4–6, holotype).

FIGURES 46–48 in Diversity of Armenian mayflies (Ephemeroptera) with the description of a new species of the genus Ecdyonurus (Heptageniidae)

FIGURES 46–48. Sites of occurrence of Ecdyonurus (Ecdyonurus) eurycephalus sp. nov.: 46, site 36 (type locality); 47, site 38; 48, site 35.

FIGURES 27–28 in Diversity of Armenian mayflies (Ephemeroptera) with the description of a new species of the genus Ecdyonurus (Heptageniidae)

FIGURES 27–28. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., leg: 27, hind leg dorsal; 28a–h, setae on dorsal surface of femora.

FIGURES 24–26 in Diversity of Armenian mayflies (Ephemeroptera) with the description of a new species of the genus Ecdyonurus (Heptageniidae)

FIGURES 24–26. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., mouthparts: 24, labrum dorsal (left) and ventral (right); 25, labrum contour; 26, labial glossae and paraglossae: left part ventral view, right part contour.

FIGURES 13–14 in Diversity of Armenian mayflies (Ephemeroptera) with the description of a new species of the genus Ecdyonurus (Heptageniidae)

FIGURES 13–14. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., genitalia of male imago: 13, styliger, forceps and penis ventral; 14, penis dorsal.

FIGURES 15–23 in Diversity of Armenian mayflies (Ephemeroptera) with the description of a new species of the genus Ecdyonurus (Heptageniidae)

FIGURES 15–23. Ecdyonurus (Ecdyonurus) eurycephalus sp. nov., larva: 15, habitus dorsal; 16, habitus ventral; 17, habitus lateral; 18, head dorsal; 19–21, semipronotum of mature larva; 22–23, semipronotum of early-instar larva.