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FIGURES 2–7. Nymphs, dorsal habitus. 2, Baetodes proiectus. 3, Camelobaetidius billi. 4, Camelobaetidius leentvaari. 5, Camelobaetidius mathuriae. 6, Harpagobaetis gulosus. 7 in The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana's Uplands

FIGURES 2–7. Nymphs, dorsal habitus. 2, Baetodes proiectus. 3, Camelobaetidius billi. 4, Camelobaetidius leentvaari. 5, Camelobaetidius mathuriae. 6, Harpagobaetis gulosus. 7, Spiritiops silvudus.

FIGURES 37–46 in The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana's Uplands

FIGURES 37–46. Camelobaetidius leentvari. Nymph. Mouthparts (Figs. 37–42): 37, labrum, left d.v., right v.v.; 38, left mandible v.v.; 39, right mandible v.v.; 40, hypopharynx v.v.; 41, maxilla v.v.; 42a, labium, left v.v., right d.v.; 42b, labial palp. 43, leg I; 44, tarsal claw I. 45, posterior margin of tergum IV. 46, paraproct.

FIGURES 17–26 in The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana's Uplands

FIGURES 17–26. Camelobaetidius billi. Nymph. Mouthparts (Figs. 17–22): 17a, labrum, left d.v., right v.v.; 17b, labrum, anterior margin; 18, left mandible v.v.; 19, right mandible v.v.; 20, hypopharynx v.v.; 21, maxilla v.v.; 22a, labium, left v.v., right d.v.; 22b, labial palp. 23, leg I; 24, tarsal claw I. 25, posterior margin of tergum IV. 26, paraproct.

FIGURES 8–16 in The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana's Uplands

FIGURES 8–16. Baetodes proiectus. Nymph. Mouthparts (Figs. 8–13): 8a, labrum, left d.v., right v.v.; 8b, labrum, anterior margin; 9, left mandible v.v.; 10, right mandible v.v.; 11, hypopharynx v.v.; 12, maxilla v.v.; 13, labium, left v.v., right d.v. 14, leg I; 15, tarsal claw I. 16, paraproct.

FIGURES 57–66 in The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana's Uplands

FIGURES 57–66. Spiritiops silvudus. Nymph. Mouthparts (Figs. 57–62): 57a, labrum, left d.v., right v.v.; 57b, labrum, anterior margin; 58, left mandible v.v.; 59, right mandible v.v.; 60, hypopharynx v.v.; 61, maxilla v.v.; 62, labium, left v.v., right d.v. 63, leg I; 64, tarsal claw I. 65, posterior margin of tergum IV. 66, paraproct.

FIGURES 67–75 in The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana's Uplands

FIGURES 67–75. Zelusia principalis. Nymph. Mouthparts (Figs. 67–72): 67a, labrum, left d.v., right v.v.; 67b, labrum, anterior margin; 68, left mandible v.v.; 69, right mandible v.v.; 70, hypopharynx v.v.; 71, maxilla v.v.; 72, labium, left v.v., right d.v. 73, leg I; 74, tarsal claw I. 75, posterior margin of tergum IV.

FIGURES 47–56 in The Family Baetidae (Insecta: Ephemeroptera) from Venezuelan Guayana's Uplands

FIGURES 47–56. Camelobaetidius mathuriae. Nymph. Mouthparts (Figs. 47–52): 47a, labrum, left d.v., right v.v.; 47b, labrum, anterior margin; 48, left mandible v.v.; 49, right mandible v.v.; 50, hypopharynx v.v.; 51, maxilla v.v.; 52, labium, left v.v., right d.v. 53, leg I; 54, tarsal claw I. 55, posterior margin of tergum IV. 56, paraproct.

FIGURES 73–75 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 73–75. Procloeon (Oculogaster) album sp. n., male imago. 73–74, the same specimen at different light; 75, head and thorax of another specimen.

FIGURES 68–72 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 68–72. Procloeon (Oculogaster) album sp. n. 68, mature female larva (reddish paired hypodermal spots on abdominal terga IV, VII and VIII visible through cuticle); 69, subimaginal abdomen extracted from mature female larva (holotype); 70, mature male larva (reddish hypodermal markings on abdominal terga IV, VII and VIII visible through cuticle); 71, subimaginal abdomen extracted from this larva; 72, male imago.

FIGURES 65–67 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 65–67. Procloeon (Oculogaster) album sp. n. 65, genitals of male imago (at left half gonovectal muscles shown by interrupted lines, hidden part of penis shown by interrupted line and dotted, gonostylar muscle not shown; at right half gonostylar muscle shown by interrupted lines, gonovectal muscles not shown; median styligeral muscle shown by interrupted lines, areas of anterior attachment of median paraproctal muscles shown by dotted lines). 66, genitals of male subimago; 67, wing. Abbreviations: 1, 2, 3, segments of gonostylus; mIX-X, areas of anterior attachment of median paraproctal muscles (i.e., muscles going from sternum IX to common base of paraprocts); usg, unistyliger.

FIGURES 49–58 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 49–58. Procloeon (Oculogaster) album sp. n., larva. 49–55, tergalii I–VII; 56, fore leg, anterior view (fine setae not shown; dots show bases of fine setae forming regular rows on apical part of femur, proximal part of tibia and proximal part of tarsus); 57, claw; 58, paraproct (49–52, 54–55, 58, holotype).

FIGURES 43–48 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 43–48. Procloeon (Oculogaster) album sp. n., larva. 43, labrum, 44, 45, apices of left and right mandibles; 46, maxilla, dorsal view; 47, half of labium, ventral view; 48, the same, dorsal view. Abbreviations: ds1, ds2, ds3, dentisetae; in1, in2, in3, in4, denticles of incisor; in-V, ventral denticle of incisor; kd1, kd2, kd3, denticles of kinetodontium.

FIGURES 38–42 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 38–42. Procloeon (Oculogaster) cylindroculum, female imago. 38, head and prothorax in Canadian balsam with embryos visible inside; 39, enlarged embryo with focus on median ocellus and mandibles; 40, mature female imago free of embryos; 41, abdomen of female imago with embryos (black eyes and ocelli visible through integument); 42, embryo extracted from female imago (38, 39, 41, 42, from Uganda; 40, from Zambezi). Abbreviations: md, mandibles; oc, future facetted eye; ocl.l., lateral ocellus; ocl.m., median ocellus.

FIGURES 33–37 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 33–37. Procloeon (Oculogaster) cylindroculum. 33, 34, male imagoes; 35, subimaginal abdomen extracted from mature male larva; 36, subimaginal abdomen extracted from mature female larva; 37, subimaginal exuviae of postsubalar sclerite and lateropostnotal crest (33, 35–37, specimens from Zambia; 34, specimen from Uganda).

FIGURES 30–32 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 30–32. Procloeon (Oculogaster) cylindroculum from Zambia. 30, genitals of male imago (at left half gonovectal muscles shown by interrupted lines, hidden part of penis shown by interrupted line and dotted, gonostylar muscle not shown; at right half gonostylar muscle shown by interrupted lines, gonovectal muscles not shown; median styligeral muscle shown by interrupted lines, areas of anterior attachment of median paraproctal muscles shown by dotted lines). 31, exuviae of subimaginal genitals; 32, wing. Abbreviations: 1, 2, 3, segments of gonostylus; mIX-X, areas of anterior attachment of median paraproctal muscles (i.e., muscles going from sternum IX to common base of paraprocts); usg, unistyliger.

FIGURES 59–64 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 59–64. Procloeon (Oculogaster) album sp. n., larva. 59, paracercus and cercus (with subimaginal cercus inside); 60, distal part of cercus; 61, posterior margin of abdominal tergum X; 62, fragment of abdominal tergum III; 63, fragment of abdominal sternum VI; 64, tergalius VI (arrow shows additional middle rib) (59, 60, holotype).

FIGURES 11–20 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 11–20. Procloeon (Oculogaster) cylindroculum, larva. 11–17, tergalii of I–VII pairs (specimen from Zambia); 18, frontal suture; 19, claw; 20, fore leg, anterior view (fine setae not shown; dots show bases of fine setae forming regular rows on apical part of femur, proximal part of tibia and proximal part of tarsus).

FIGURES 1–10 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 1–10. Procloeon (Oculogaster) cylindroculum, larva. 1–7, tergalii of I–VII pairs (specimen from Uganda); 8, 9, apices of left and right mandibles, dorsal view; 10, apex of right mandible, apical view. Abbreviations: in1, in2, in3, in4, denticles of incisor; in-V, ventral denticle of incisor; kd1, kd2, kd3, denticles of kinetodontium.

FIGURES 21–29 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 21–29. Procloeon (Oculogaster) cylindroculum, larvae from Zambia. 21, cercus and paracercus; 22, distal part of cercus; 23–25, abdominal terga and sterna; 26, right half of pronotum and mesonotum; 27, subimaginal exuviae of right half of mesonotum; 28, maxilla; 29, labrum.

FIGURES 76–79 in A new subgenus Oculogaster subgen. n. for viviparous representatives of Procloeon s. l., with discussion about status of the generic name Austrocloeon Barnard 1932 and the species name africanum Esben-Petersen 1913 [Cloeon] (Ephemeroptera, Baetidae)

FIGURES 76–79. Procloeon (Oculogaster) album sp. n., female imago. 76, 77, lateral and dorsal view; 78, 79, part of prothorax and part of abdomen with black eyes and ocelli of embryos visible through integument.