Thraulobaetodes Elouard & Hideux 1991

Kluge, Nikita J., 2015, First description of winged stages of Thraulobaetodes Elouard & Hideux 1991 and reclassification of Rhithrocloeoninae (Ephemeroptera, Baetidae), Zootaxa 3949 (4), pp. 491-514 : 494

Genus Thraulobaetodes Elouard & Hideux 1991

( Figs 1–48 )

Type species: Thraulobaetodes cumminsorum Elouard & Hideux 1991 . Rank-free hierarchical name: Thraulobaetodes /fg(1).

Diagnosis. Coincides with description of Th. cumminsorum (see below).

Composition. Includes the single species Th. cumminsorum Elouard & Hideux 1991 .

Figures

FIGURES 1 – 6. Thraulobaetodes cumminsorum, larval mouthparts (on the same scale). 1, labrum, dorsal view; 2, 3, apices of left and right mandibles; 4, labium (at left half, dorsal view; at right half, ventral view with muscles shown by interrupted lines); 5, maxilla, dorsal view; 6, maxillary palp of another specimen.

FIGURES 7 – 10. Thraulobaetodes cumminsorum, larval mouthparts (on the same scale). 7, superlinguae; 8, hypopharynx and maxilla (arrow shows 3 rd segment of maxillary palp); 9, labium; 10, right mandible.

FIGURES 11 – 17. Thraulobaetodes cumminsorum, larva. 11, neck articulation and prothorax, lateral view; 12, lateral view of last instar female larva; 13, 14, 15 cross sections of ridges on pronotum, mesonotum and metanotum; 16, outline of hind protopteron with developing subimaginal hind wing inside; 17, abdominal segment IV with left tergalius, posterior view.

FIGURES 18 – 24. Thraulobaetodes cumminsorum, exuviae of last instar larva spread on slide (Figs 18, 19, 21 and 22 on the same scale). 18, abdominal terga I – IX; 19, left half of pronotum and mesonotum; 20, part of pronotum, enlarged; 21, hind leg; 22, head of male larva; 23, abdominal tergum IV; 24, paraprocts.

FIGURES 25 – 30. Thraulobaetodes cumminsorum, legs. 25, larval middle leg, front view; 26, claw, median view; 27 – 29, fragment of subimaginal leg, front view: 27, fore leg of male; 28, fore leg of female; 29, hind leg of female; 30, tibia and tarsus of subimaginal middle leg, front view (same individual on same scale as Fig 25). Arrow shows patella-tibial suture.

FIGURES 31 – 37. Thraulobaetodes cumminsorum. 31, fore and hind wing on the same scale; 32, hind wing, enlarged; 33, apex of fore wing of another individual; 34, head of female imago; 35, outline of abdominal segment IX of mature male larva with developing subimaginal genitals inside (in left half muscles shown by interrupted lines); 36, exuviae of left gonostylus of male subimago; 37, genitals of male imago, the same individual (muscles shown by interrupted lines; in left half gonostylar muscle not shown, internal sclerotized part of penis shown by interrupted line and dotted; in right half cuticular pigmentation shown by dots). Abbreviations: gs 1, gs 2, gs 3, segments of gonostylus; m. gs, gonostylar muscle; m. gv 1, m. gv 2, muscles of gonovectis; m. s, sterno-styligeral muscle; us, unistyliger.

FIGURES 38 – 44. Thraulobaetodes cumminsorum. 38, apex of abdomen of male imago, lateral view; 39, genitals of male subimago, ventral view; 40, subimaginal exuviae of genitals; 41, genitals of male imago of the same individual, ventral view; 42, female imago; 43, male imago (arrows show protuberances—remnants of larval spines on abdominal terga); 44, mesonotum, lateral-dorsal view.

FIGURES 45 – 48. Thraulobaetodes cumminsorum. 45, 46, subimaginal exuviae spread on slide (on the same scale): 45, left half of mesonotum; 46, part of mesopleuron and metapleuron, with fragments of fore and middle legs. 47, 48, egg and its enlarged fragment (extracted from female imago). Abbreviation: psa, postsubalar sclerite of mesothorax.