Macrostemum santaeritae (Ulmer 1905a)

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, Zootaxa 3716 (3), pp. 301-335 : 325-327

Macrostemum santaeritae (Ulmer 1905a)

Figs. 13 A–E

Macronema Santae Ritae Ulmer 1905a: 85 [type locality: Brazil, Rio Preto, zwischen Boquerao und Sta. Rita; NMW; ♀]; Ulmer 1907a: 79, 80 [♀; wings]; Ulmer 1907b: 165 [distribution; as Macronema santae ritae ]; Ulmer 1913: 397, 408, 412 [distribution; as Macronema Santae Ritae ]; Fischer 1963: 196 [bibliography, distribution; as Macronema santaeritae ]; Flint 1966: 7, Plate 1 [♀; wings; as Macronema santaeritae ]; Flint 1978: 390, 400, 413, 416 [distribution; wings; male genitalia; as Macronema santaeritae ].

Macrostemum santaritae (Ulmer 1905a) ; Flint et al. 1999: 68 [taxonomic notes; distribution]; Paprocki et al. 2004: 8 [distribution]; Nogueira & Cabette 2011: 350 [distribution].

The genital apparatus of M. santaeritae resemble those of M. erichsoni , but in this species the anterior margin of abdominal segment IX is rounded in lateral view. The characters that make this species unique include a pair of dorsal processes on the phallotremal sclerite and its trapezoidal shape in ventral view. Furthermore, the anterior wings of M. santaeritae are, in general, almost entirely hyaline.

Synopsis. Adults pinned. Forewing mean length 10.2 mm (9.02–11.5 mm, n=13). Head brownish-yellow, with dark spot on anterior region. Compound eyes brown. Scapes brown on dorsal surface, yellow on ventral surface, with brown setae. Maxillary palps brownish-yellow, with yellow setae. Prothorax yellow or black, with yellow spots on pleural surface. Meso- and metathorax yellow, with brown spots. Legs brownish-yellow. Tibial spur formula 2,4,4. Forewings mostly hyaline, with at least small portion of one dark spot on apical area or with fingershaped dark patch bordering entire apical area; discoidal cell present; radial sector normal ( Fig. 13 A).

Male genitalia. Abdominal segment IX, in lateral view, with anterior margin rounded; posterior margin sinuous, deeply notched, bordered by setae above and below notch ( Fig. 13 B); in dorsal view, with posterior margin rounded with long setae bordering right and left margins ( Fig. 13 E);. Segment X, in dorsal view, bilobed, each lobe tapered, blunt, with subapical wart with pair of subdorsal clusters of small setae near midlength; in lateral view, subtriangular, blunt apically, with subdorsal cluster of small setae at midlength, subapical wart, and row of small setae bordering each ventrolateral margin ( Fig. 13 B). Inferior appendages uniformly wide, covered uniformly by small setae; each with basal segment approximately 1.5X length of apical segment and with long ventral setae at base ( Fig. 13 B). Phallus arched; apex acuminate in lateral view ( Fig. 13 C); phallotremal sclerite, trapezoidal, bearing pair of dorsal processes, anterior margin concave, posterior margin nearly straight in middle ( Fig. 13 D); phallotrema rounded, concave, apically positioned on posterodorsal surface of phallus ( Fig. 13 D).

Material examined. BRAZIL: Acre: Mâncio Lima, Parque Nacional Serra do Divisor, Igarapé Ar Condicionado, 17.iii.2006, luz, A.R. Calor leg., 1 male (alcohol; UFBA); Amazonas: Manaus, 60 Km N. A Res. Campina, 3.iii.1977, 1 male (pinned; INPA); Rio Preto da Eva, AM 010-Km 74, Instituto Adventista Agroindustrial, Igarapé II, próximo da barragem (#30); 2º41’41.3’’S, 59º44’6.6’’W, 13–16.iv.2008, C.A.S. Azevedo, M. Pepinelli, U.G. Neiss leg., 1 female (alcohol; INPA); Bahia: Barreiras, Cachoeira Redondo, 11º53’S, 45º25’W, 573 m, 5.vi.2008, luz, Bravo, Menezes, Alvim, Silva-Neto leg., 1 female (alcohol; UFBA); same data except Rio das Ondas, 12º08’33.4’’S, 45º06’14’’W, 492 m, 15.x.2008, luz UV e branca, Calor, Mariano, Mateus leg., 3 males, 4 females (pinned; UFBA); Mato Grosso: Ribeirão Cascalheira, Gleba Maria Tereza “Corgão”, 28.xi.2006, luz, A.R. Calor, R. Silva, S. Mateus leg., 1 male, 1 female (alcohol; UFBA); Pará: Rio Xingu, camp (3º39’S, 52º22’W) ca 60 km S. Altamira, x.1986, P. Spangler & O. Flint leg., 5 males, 17 females (pinned; MZSP).

Distribution. Argentina and Brazil (AC, AM, BA, MT, PA).

Figures

FIGURE 13. Macrostemum santaeritae (Ulmer 1905 a). A, right fore- and hind wings, dorsal view; B – E, male genitalia: B, left lateral view; C, phallus, left lateral view; D, apex of phallus, ventral view; E, terga IX and X, dorsal view.