Simothraulopsis caliginosus Do, Salles & Hamada, 2017, sp. nov.

• Main Authors: Do, Jeane M. C., Salles, Frederico F., Hamada, Neusa
• Format: Other/Unknown Material
• Language: unknown
• Published: 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Ephemeroptera; Leptophlebiidae; Simothraulopsis; Simothraulopsis caliginosus; Stripe; Rodriguez; antartic*
• Online Access: https://zenodo.org/record/6023586; https://doi.org/10.5281/zenodo.6023586

Simothraulopsis caliginosus sp. nov. (Figs 2 B, 3C, 29–33) Diagnosis. Male imago: 1) general coloration: thorax dark brown, abdomen black (Figs 29 A, B); 2) hind wing with costal projection forming a right angle, located approximately 1/2 distance from base to apex of wing (Figs 30 B, C); 3) abdominal terga II and III with laterobasal whitish translucent white angles; terga IV and V with translucent white basal bands (Figs 29 A, B); 4) penis projection lanceolate, of almost same width throughout most of its length, short (less than the half of total length of penis lobes) and slightly laterally directed (Figs 29 D, 30D); 5) penis lobes fused on basal half (Fig 30 D); 6) ventral region of penis lobes with a well-marked sclerotized region (Fig. 29 D). Mature nymph: 1) coxa and trochanter of foreleg with pectinate setae (Fig. 33 A); 2) femur III robust, about two times longer than wide (Fig. 33 C); 3) posterolateral projections presents on abdominal segments V–IX (Fig. 33 D); 4) gills grayish violet (Fig. 31 E). Male imago. Length: body: 4.8–5.1 mm; forewing: 4.9–5.2 mm; hind wing: 0.4–0.6 mm. Head. Dorsal region dark brown, with black marks; ventral region brown, with gray marks. Upper portion of compound eyes brown, lower portion black; ocelli withish gray, surrounded by black (Figs 29 A, B). Scape and pedicel of antenna brown, flagellum whitish brown. Thorax. Pronotum orangish brown, margins black; with a submedial black stripe. Mesonotum dark brown; longitudinal medial, anterolateral scutal, lateroparapsidal and medioparapsidal sutures light brown; posterior scutal protuberance, scuto-scutellar impression and scutellum black. Pleura brown washed with dark brown; membranous area grayish. Metanotum dark brown. Sterna light brown, sutures darker (Figs 29 A, B). Wings membrane hyaline (Figs 30 A–C). Forewing with longitudinal veins whitish yellow and cross veins translucent; costal arms and base of veins C, Sc and anal section dark brown; fork of vein MP slightly asymmetric (Fig. 30 A). Hind wing with costal ...