Marilia mahedae Neto & Pes & Hamada 2017, sp. nov.
Creators: name: Neto, Jaime De Liege Gama
name: Pes, Ana Maria
name: Hamada, Neusa
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Odontoceridae
Marilia
Marilia mahedae

description: Marilia mahedae sp. nov.
Figures 1A–B, 2A–E
Diagnosis. The male of M. mahedae new species is similar to those of M. aiuruoca Dumas & Nessimian 2009, M. humerosa Flint 1983, M. lateralis Flint 1983, M. misionensis Flint 1983, and M. salta Flint 1983, by having tibial spur formula 2–4–4, compound eyes almost contiguous middorsally, and the phallic endotheca lacking spines. However, the new species can be distinguished from these five species by the preanal appendages wide basally in dorsal view; phallotheca very short; and presence of an acute subapicoventral projection, directed anterad in lateral view, in the extruded endotheca.
Description. Male. Light brown (in alcohol). Compound eyes large, almost touching each other middorsally. Antennae long, each about twice as long as body, its scape broad and covered with fine setae. Prothorax small, less than half length of head; pronotum with pair of long and transverse setal warts. Mesothorax broad, without setae; mesonotum with light brown median line extending to mesoscutellum and pair of mesolateral setal warts; mesoscutellum almost circular, light brown. Metathorax yellowish, approximately half as long as mesothorax, without setae; metascutellum triangular. Tibial spur formula 2–4–4; external spur of each mid- and hind tibia shorter than internal one. Length of each forewing 6.71–7.67 mm (n = 10, mean = 7.16, SD = 0.33); general color dark-brown; forks I, II, and V present; R2 (fork I) arising near midlength of discoidal cell (Fig. 1A); dense rows of fine hairs along midlengths of SC and A1+2+3. Hind wings each with dense row of fine hairs along most of SC and tuft of long setae (similar to brush) on anal lobe; forks I and II present; Cu2 weak in basal half, suddenly stronger in apical half (Fig. 1B). Abdominal segments I–VIII simple, with no differentiated structures.
Male genitalia. Segment IX with medially produced posterior margin on each side in lateral view; two lateromedian sutures dividing each side of segment into three parts of different sizes and shapes; ventral part occupying almost half of segment in lateral view (Fig. 2A). Preanal appendages subtriangular in lateral view, slightly shorter than tergum X (Fig. 2A); subrectangular and rounded apically in dorsal view (Fig. 2B). Segment X subquadrate in lateral view, with truncate and semimembranous apex (Fig. 2A); in dorsal view subquadrate, bipartite, membranous mesally, with short apical V-shaped incision (Fig. 2B). Inferior appendages each with two articles (Figs. 2A and 2C); basal article cylindrical, larger at base, slightly curved mesad subapically, especially on subapicomesal margin (Fig. 2C); apical article short, rounded apically, with small conical dark spines (Figs. 2A and 2C). Phallus tubular, slightly sclerotized and curved downward in basal third in lateral view (Fig. 2D); membranous endotheca forming acute subapicoventral projection directed anterad (Fig. 2D); phallotremal sclerite curved in median region resembling funnel in lateral view (Fig. 2D), ovoid in dorsal view (Fig. 2E).
Female, pupa, larva, and egg: Unknown.
Holotype male. BRAZIL: Roraima: Amajari, Serra do TepequÉm, second order stream, 03°87'39.6"N / 61°44'49.8"W, 30.v.2012 – 3.vi.2012, Pennsylvania light trap, J.L. Gama Neto col. (alcohol, INPA).
Paratype. 4 males, same data as holotype (alcohol; 2 INPA; 2 UFBA).
Distribution. Brazil (Roraima).
Etymology. The specific epithet honors Mahedy Araujo Bastos Passos, wife of the first author.
description: Published as part of Neto, Jaime De Liege Gama, Pes, Ana Maria & Hamada, Neusa, 2017, Checklist and new species of caddisfly (Insecta: Trichoptera) from Roraima state, Brazil, pp. 475-488 in Zootaxa 4338 (3) on pages 476-478, DOI: 10.11646/zootaxa.4338.3.4, http://zenodo.org/record/1037010