Thraulodes spangleri Traver & Edmunds 1967

Kluge, Nikita J., 2020, Systematic position of Thraulodes Ulmer 1920 (Ephemeroptera: Leptophlebiidae) and descriptions of new and little-known species, Zootaxa 4756 (1), pp. 1-142 : 91-94

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Thraulodes spangleri Traver & Edmunds 1967


12. Thraulodes spangleri Traver & Edmunds 1967

( Figs 379–410 View FIGURES 379–388 View FIGURES 389–395 View FIGURES 396–402 View FIGURES 403–408 View FIGURES 409–410 )

Thraulodes spangleri Traver & Edmunds 1967: 377 , figs 30, 53, 57 (♂ and ♀ imago).

Material examined. PANAMA, Provincia Chiriqui, La Esperanza, 7 km NNW Gualaca , Rio Chiriqui (8°35’N, 82°20’W), 15–22.I.2018, coll. N. Kluge & L. Sheyko: 5 S-I ♂, 4 S-I ♀, 1 I ♀, 2 L /S ♂. GoogleMaps


Larva. CUTICULAR COLORATION ( Figs 379–483 View FIGURES 379–388 View FIGURES 389–395 View FIGURES 396–402 View FIGURES 403–408 View FIGURES 409–410 View FIGURES 411–426 View FIGURES 427–438 View FIGURES 439–447 View FIGURES 448–449 View FIGURES 450–463 View FIGURES 464–473 View FIGURES 474–478 View FIGURES 479–490 ). Dorsal side of head, thorax and abdomen mostly brown with few blanks: pronotum bordered by light laterally; abdominal terga with blanks on lateral parts, area mediad of tergalii attachments nearly unicolor brown, terga VIII–IX with diffusive blank medially. Femora mostly brown, with blanks; tibiae and tarsi uniformly light brown.

HYPODERMAL COLORATION. Abdominal hypodermal coloration unknown. Tergalii yellowish with gray, tracheae black ( Fig. 385 View FIGURES 379–388 ).

SHAPE AND SETATION. Clypeus parallel-sided; labrum 1.2–1.3 times wider than clypeus ( Fig. 389 View FIGURES 389–395 ). Labrum widest at midlength, with narrow median emargination exposed ventrally; if all 5 denticles present, bottom of median emargination formed by 3 narrower denticles and its sides formed by 2 wide denticles ( Fig. 390–391 View FIGURES 389–395 ) (some denticles can be fused); anterior transverse setal row wider than all 5 denticles, in its median part represents field of irregularly situated setae ( Figs 393–394 View FIGURES 389–395 ). Maxilla with 17 pectinate setae in apical-ventral row.

Femora: Stout setae on anterior surface narrowed distally or parallel-sided, apically blunt ( Fig. 387 View FIGURES 379–388 ). Irregular row of hairs near inner margin absent on fore femur, present on middle and hind femora.

Fore tibia ( Fig. 386 View FIGURES 379–388 ): outer hairs form two irregular rows; inner-anterior row of recurved hairs absent; inneranterior row of stout setae represented by few (2–3) stout setae near tibia base; inner field of stout pointed setae, consists of 2 well-distinguishable rows: one regular anterior row formed by short, curved, tridentate or bidentate (i.e. vestigial bipectinate) pointed stout setae, and one regular posterior row formed by long, straight, non-pectinate, pointed stout setae.

Hind tibia ( Fig. 388 View FIGURES 379–388 ): outer-anterior and outer-posterior rows of stout setae consist of narrowed distally, blunt stout setae of various lengths and long spoon-like setae; hairs located between these rows, numerous and form more than one row (besides row of hairs posteriad of outer-posterior row of stout setae); stout setae of inner-anterior row of various lengths, narrowed distally and blunt.

Claws with 6–8 denticles on rigid portion, with or without minute denticles on articulatory portion.

Tergalii ( Fig. 385 View FIGURES 379–388 ): each lamella slender, tracheae without side branches.

Male genitalia in last larval instar ( Fig. 407 View FIGURES 403–408 ): protogonostyli moderately long and separated one from another by emargination with convex setose bottom. Each protopenis lobe smoothly stretched to gonopore-bearing process located near median margin; gonopores opened caudally.

Subimago ( Figs 384, 386–387 View FIGURES 379–388 , 406 View FIGURES 403–408 ). CUTICULAR COLORATION. Cuticle with colorless, light brownish and dark brown areas. Pronotum medially colorless, lateral areas diffusively shed by light brown. Mesonotum with diffusively outlined light brown macula occupying median part of anteronotal protuberance and anteronotal transverse impression; antelateroparapsidal and lateroparapsidal sutures dark brown either entirely ( Fig. 396 View FIGURES 396–402 ), or partly ( Fig. 397 View FIGURES 396–402 ); posterior part of lateroscutum and median part of posterior scutal protuberance brown; chromozones either colorless ( Figs 397 View FIGURES 396–402 ), or chromozone of medioscutum colored as a light brownish stripe separated from brown light macula on anteronotal transverse impression ( Fig. 396 View FIGURES 396–402 ). Thoracic pleura and sterna mostly colorless. On fore leg femur partly colorless, on outer and inner margins brownish, with narrow dark brown band at apex; tibia brown, darker brown proximally and distally; tarsus brown. Middle and hind legs lighter, without dark brown band on apex of femur, with tibia uniformly light brown. Cuticle of wings colorless, microtrichia light brownish. Abdominal terga light brownish with composite maculation; sterna colorless; gonostyli and caudalii light brown.

TEXTURE. On tarsi of all legs, 1st tarsomere with microtrichia (as tibia), 2nd–5th tarsomeres coved by blunt microlepides; pointed microlepides present near apical margins of 2nd–4th tarsomeres of middle and hind legs (as in Fig. 473 View FIGURES 464–473 ).

Male imago ( Figs 398–400 View FIGURES 396–402 ). Anterior part of head (bearing antennae) whitish, posterior part (bearing ocelli) brown with ocher. Antenna ocher, pedicellus either orange, or with apex brown. Dorsal eyes contiguous medially, dull orange.

Pronotum ocher with blackish-brown median stripe and brown lateral areas. Mesonotum and metanotum ocher with brown. Thoracic pleura ocher with interrupted blackish-brown stripe above coxa. Mesothoracic basisternum ocher; episterna and furcasternal protuberances from orange to brown; furcasternal median impression ocher, with peculiar round dark brown spot ( Fig. 400 View FIGURES 396–402 ).

Cuticle of legs mostly colorless; on fore leg apex of femur and base of tibia with cuticle light brown. Legs with following hypodermal pigmentation on whitish background. Fore femur: middle 1/3 on anterior-inner side orange with blackish-brown; middle 1/3 on posterior side occupied by blackish-brown spot; distal 1/3 on both sides occupied by orange band; on posterior side apical orange band separated from middle brown spot by oblique non-pigmented stripe; inner margin of femur at distal 2/3 blackish-brown. Fore tibia apically blackish-brown; tarsus with last segment apically brown. Middle and hind femur with irregular, diffusive gray-brown spot in middle part and multicolored pre-apical band located within apical 0.4 of femur; pre-apical band mainly orange-brown, proximally with blackish-brown, on inner side with blackish-brown longitudinal stripes; apical 0.1 of femur non-pigmented. In selected individual, relation of fore femur to fore wing length 65:280; proportions femur/tibia/tarsomeres on fore leg 65:97:3:18:15:11:9; on middle leg 63:70:3:3:3:2:8; on hind leg 75:75:3:3:3:2:8.

Fore wing with well developed costal cross veins proximad of bulla; pterostigmatic cross veins moderately dense, either simple, or partly anastomosed ( Fig. 398 View FIGURES 396–402 ). Longitudinal veins light ocher, cross veins brown; dark brown macula on crossing of costal brace and Sc; cross veins of anterior-proximal area of wing (including proximal costals) bordered by brown. Hind wing with all veins light ocher, without coloration (even costal brace non-colored), with prominent costal projection ( Fig. 408 View FIGURES 403–408 ). Coloration of fore wing partly appear during larval development, being in subimago less contrasting than in imago.

Abdominal hypodermal coloration: Tergum I brown. Terga II–VI light ocher, translucent, with pair of wide brown oblique lateral stripes widest on tergum II and narrowest on tergum VI; pleura with small brown stigmatic dots. Terga VII–X orange with whitish median stripe; tergum VII with whitish poster-lateral areas; tergum VIII with whitish lateral and posterior areas connected with whitish median stripe. Sterna I–IX ocher. Caudalii whitish, with black spots on each joining; in proximal part of caudalius each 2nd joining with enlarged black spot, in distal part of caudalius each 4th joining with enlarged black spot.

Genitalia ( Figs 402–406 View FIGURES 396–402 View FIGURES 403–408 ): Styliger light ocher; gonostyli mostly light ocher, preapical segment brown. Dorsal extension of styliger long and parallel-sided. Penis lobes sharply widened and divergent apically, with prominent lateral pouches. Apico-lateral area forming ear, projected laterally. Telopenes in form of spear-like rolls, attached on dorsal side and directed medially-dorsally, nearly straight, with groove opened dorsally-laterally ( Figs 403, 405 View FIGURES 403–408 ).

Female imago ( Fig. 401 View FIGURES 396–402 ). Abdominal terga II–VI brownish with ocher; in other respects coloration similar to that of male.

Eggs ( Figs 409–410 View FIGURES 409–410 ). Mostly barrel-shaped. Each KTC surrounded by wide, smooth ring-like cover. Large and small protuberances densely located close to these rings and less densely on other chorion.

Dimension. Fore wing length (and approximate body length) 6–7 mm.

Distribution. Mexico, Honduras, Costa Rica ( Traver & Edmunds 1967); Panama (this study).














Thraulodes spangleri Traver & Edmunds 1967

Kluge, Nikita J. 2020

Thraulodes spangleri

Traver, J. R. & Edmunds, G. F. Jr. 1967: 377