Macrostemum braueri Banks 1924
Creators: name: França, Diogo
name: Paprocki, Henrique
name: Calor, Adolfo R.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydropsychidae
Macrostemum
Macrostemum braueri

description: Macrostemum braueri (Banks 1924)
Figs. 7 A–E
Macronema braueri Banks 1924: 454, Plate 1 [type locality: Brazil, Amazonas, Tefé; MCZ; ♀; wings]; Fischer 1963: 178 [bibliography, distribution]; Flint 1978: 390, 401, 416, 420, 421 [distribution; ♂; wings].
Macrostemum braueri (Banks 1924); Flint et al. 1999: 68 [taxonomic notes; distribution]; Paprocki et al. 2004: 8 [distribution].
Macrostemum braueri can be diagnosed by the long acuminate anteroventral prominence at the apex of the phallus, in lateral view, and by the M-shaped phallotremal sclerite in ventral view. The forewings of this species resemble those of M. negrense, but in this species the dark spot on the apical area delimits only one boot-shaped hyaline area while in M. negrense it delimits two boot-shaped hyaline areas.
Synopsis. Adults in alcohol. Forewing mean length 8.9 (8.28–10.13 mm, n=3). Head yellow with brown spot behind eyes. Compound eyes black. Scapes yellow. Maxillary palps black at middle and pale yellow at ends. Prothorax yellow. Meso- and metathorax yellow. Legs yellow with foretibiae brown. Tibial spur formula 2,4,4. Forewings mostly hyaline, each with one dark spot bordering apical area and delimiting one boot-shaped hyaline area; discoidal cell present; radial sector normal (Fig. 7 A).
Male genitalia. Abdominal segment IX, in lateral view, with anterior margin rounded; posterior margins concave and bordered by long setae (Fig. 7 B); in dorsal view, posterior margin with medial rounded keel and long setae bordering right and left margins (Fig. 7 E). Segment X, in dorsal view, bilobed, each lobe apically rounded and with subapical wart; with one pair of pronounced, subdorsal warts basally and pair of subdorsal, longitudinal rows of setae (Fig. 7 E); in lateral view, subtriangular, blunt apically, with irregular row of small, ventrolateral setae in apical half, in addition to warts and setae visible in dorsal view (Fig. 7 B). Inferior appendages covered uniformly by short setae and uniformly wide throughout their length; each with basal segment approximately 1.5 times length of apical segment; apical segment slightly upcurved (Fig. 7 B). Phallus arched; apex, in lateral view, truncate, with long acuminate posteroventral prominence (Fig. 7 C); phallotremal sclerite broadly M-shaped, without dorsal process (Fig. 7 D); phallotrema apically positioned on posterodorsal surface of phallus (Fig. 7 D).
Material examined. BRAZIL: Amazonas: Manaus, Reserva Ducke, 24.ix.1976 (10-7), 1 male (pinned; INPA); Rio Preto da Eva, Ramal Baixo Rio, Estrada Poliana, Igarapé do Geladinho (#38), 2º46’48,2’’S, 59º39’9,6’’W, 24–27.ix.2008, armadilha luminosa (pensilvania), J.O. da Silva, C. Monteiro, C. Menezes leg., 3 males (alcohol, UFBA).
Distribution. Brazil (AM).
description: Published as part of França, Diogo, Paprocki, Henrique & Calor, Adolfo R., 2013, The genus Macrostemum Kolenati 1859 (Trichoptera: Hydropsychidae) in the Neotropical Region: Description of two new species, taxonomic notes, distributional records and key to males, pp. 301-335 in Zootaxa 3716 (3) on page 314, DOI: 10.11646/zootaxa.3716.3.1, http://zenodo.org/record/217687