Thraulodes rodrigoi, Boldrini & Dantas & Lima, 2018

Boldrini, Rafael, Dantas, Hanna Ashley Tavares Pontes & Lima, Lucas Ramos Costa, 2018, New species and new record of Thraulodes Ulmer, 1920 (Ephemeroptera: Leptophlebiidae: Atalophlebiinae) from Brazil, Zootaxa 4527 (2), pp. 277-280 : 278-280

Thraulodes rodrigoi sp. nov. ( Figs. 1–7 )

Diagnosis. Imago: 1) forewing with 1 weakly marked cross veins basal to bullae ( Fig. 4 ); 2) costal and subcostal areas of forewing opaque; 3) femora of forelegs with an apical transversal band brown heavily marked and one submedian macula ( Fig. 1 ); 4) tergum I washed with reddish brown; terga II–VI with a medial reddish brown band on posterior margin; terga VII, IX and X reddish brown with lateral areas white ( Figs. 1, 3 ); 5) styliger plate triangular with a medial rounded projection ( Fig. 6 ); 6) penes short and wide, without lateral pouch; penes spines short, with 1.56x the width of penes base, with base robust, tapering to apex ( Fig. 7 ).

Male imago: Length of body: 6.2–6.3 mm; forewings: 7.0 mm; hind wings: 1.3 mm. General color whitish with reddish brown areas.

Head ( Fig. 1 ): Reddish brown. Scapes and pedicels light brown. Ocelli white, surrounded by a dark brown ring at base. Eyes black, turbinate portion reddish.

Thorax ( Figs. 1, 2 ): Pronotum brown, scutellum dark brown; meso- and metanotum light brown. Prosternum whitish; mesosternum white, anterior region brown; metasternum brown with median region darker.

Legs ( Fig. 1 ): All legs with coxae whitish; fore femur with a strongly marked apical reddish brown band, and a submedian reddish brown maculae; mid and hind femur with a strongly marked subapical reddish brown band; tibia and tarsi washed with light brown.

Wings ( Figs. 4, 5 ): Membrane of wings hyaline with reddish brown stain at base. Membrane between C and Sc of forewings opaque. Forewings with one cross vein weakly marked basal to bullae and 10 distal to bullae.

Abdomen ( Figs. 1, 3 ): segments predominantly translucent white; two lateral reddish brown spots on terga II–VI; tergum I washed with reddish brown; terga II–VI with a medial reddish brown band on posterior margin; terga VII, IX and X reddish brown with lateral areas white. Caudal filaments yellowish white, with reddish brown annulations.

Genitalia ( Fig. 6 ): Styliger plate triangular, with a medial rounded projection. Forceps yellowish, with strong constriction on the middle of segment I. Penes short and wide, without lateral pouch; penes spines short, 1.56 x the width of the medial region of the penes, with base robust, tapering to apex ( Fig. 7 ).

Etymology. The specific epithet honors Rodrigo Lopes Borges, a student who devoted himself to entomology during his undergraduate studies but passed away due to cancer.

Distribution. Roraima State, Brazil.

Material Examined. Holotype: Male imago (used to take pictures), Brazil, Roraima, Alto Alegre, Floresta Nacional de Roraima, Rio Preto , light trap, 02°56’18.05’’N / 61°37’27.28’’W, 18-22.xii.2017, Boldrini, R., Oliveira, I.B., Barbosa, F.S., Almeida, M.L.S., Picanço, M.M. and Xavier, F.F. leg. Paratype: male imago, same data as holotype (wings, legs and genitalia mounted on slides).

Comments. Thraulodes rodrigoi sp. nov. resembles T. flinti Domínguez, 1987 in having a triangular styliger plate and short, broad penes with lateral pouch absent, forewings with cross veins basal to bullae, and fore femur with a strongly marked apical band and with a submedian maculae. Nevertheless, imagos of T. rodrigoi sp. nov. can be distinguished from T. flinti by the shape of forceps, segment I with strong constriction on the middle in T. rodrigoi , while segment I has a constriction on basal 1/3 of segment I in T. flinti . and T. flinti has 4 weakly marked cross veins basal to bullae, while the new species has only one.

Figures

FIGURES 1–3. Thraulodes rodrigoi sp. nov., male imago: 1) body (lateral view); 2) thorax (dorsal view); 3) abdomen (dorsal view).

FIGURES 4–7. Thraulodes rodrigoi sp. nov., male imago: 4) forewing; 5) hind wing; 5a) hind wing (enlarged); 6) genitalia, ventral view; 7) detail of penes, ventral view.