Arthropeina lindneri, Fachin, Diego Aguilar & Amorim, Dalton De Souza, 2014

Fachin, Diego Aguilar & Amorim, Dalton De Souza, 2014, Taxonomic revision of the Neotropical genus Arthropeina Lindner, 1949 (Diptera: Xylomyidae), Zootaxa 3827 (2), pp. 231-257 : 248-249

Arthropeina lindneri , sp. nov.

( Figs. 5, 32–37, 57, 63, 72–73, 81, 87)

Diagnosis (female). Body color mostly whitish yellow to yellow ( Figs. 81, 87), except scutum reddish yellow ( Fig. 63). Scutum with two black spots anteriorly, a pair of quadrate black spots between posterior margin of postpronotal lobes and transverse suture, and a medial black band gradually widening from anterior margin of scutum to base of scutellum ( Fig. 63). Projection of posterior margin of genital fork long, rounded ( Figs. 32–34). Spermathecal capsule simple, with no coils ( Fig. 35).

Material examined. HOLOTYPE, ♀, BRAZIL, Rondônia, Porto Velho, Área Mutum, M 5 P4, 09º 35 ’ 29.5 ”S 65 º02’ 57.6 ”W, 29.iii–05.iv. 2012, Silva, R.R. & Albuquerque, E.Z. cols. ( MZUSP). PARATYPES: 1 ♀, BRAZIL, Acre, Mancio Lima, Pq. Nac. Serra do Divisor, Malaise, 5.ix. 2007, L. Menezes ( MZUSP); 1 ♀, Igarapé do Amor, 5.xi. 2007 ( MZUSP). 1 ♀, Roraima, Caracaraí (Vila Caicubi, Trilha do Bacaba), 00° 58 ’ 36.5 ”S 62 °06’08.7”W, 28.viii– 10.ix. 2011, Malaise 1, Biffi, G. & Prado, L.R. cols. ( MZUSP). 1 ♀, Rondônia, Cacaulândia, Trilha Cachoeira Jamari, 131 m, 10 º 13 ’ 26.8 ”S 63 º 13 ’ 49 ”W, 04.xi 2011 – 10.ii. 2012, Malaise 27, Lamas, Nihei & eq. col. ( MZUSP). 1 ♀, Monte Negro, Fazenda Amorim, 10 ° 40 ’ 6 ”S 63 ° 29 ’0”W, 248m., Malaise trap 6., 03– 15.xii. 2011, Amorim, Ament & Riccardi col. 1 ♀, Porto Velho, Área Mutum, M 7 P3, 09° 35 ’ 41.6 ”S 65 °03’ 54.2 ”W, 29.iii–05.iv. 2012, Silva, R.R. & Albuquerque, E.Z. cols. ( MZUSP). 1 ♀ (antennae and left wing slide–mounted), Porto Velho, Área Caiçara, C 3 P3, 09º 26 ’ 46.8 ”S 64 º 49 ’ 31.1 ”W, 29.iii–05.iv. 2012, Silva, R.R. & Albuquerque, E.Z. cols. ( MZUSP). 1 ♀, GUYANA, Mazaruni-Potaro District, Takutu Montains, 6 ° 15 ’N 59 ° 5 ’W, 14.xii. 1983, Malaise trap near stream in montane rainforest, P.J. Spangler & W.E. Steiner ( USNM).

Description. Female. Length: body, 5.0– 7.5 mm; wing, 5.5 –8.0 mm. Head. Vertex pale, setation yellow. Upper frons yellow to reddish yellow. Flagellomeres l– 3 dark brown to black on outer margin, pale ventrally on inner margin; flagellomeres 4–8 dark brown to black; length of flagellomere 8 more than three times length of seventh ( Fig. 5). Palpus ( Fig. 73) pale, elongate; basal segment cylindrical, as long as wide; apical segment oval, length 2.25 –2.0 times its width, 2.0– 3.75 times length of basal segment; pale hairs. Thorax ( Fig. 63). Postpronotal lobes pale, slightly contrasting with scutum color, and with a very narrow notopleural strip light brownish. Scutum reddish yellow, with two black spots anteriorly, two more or less quadrangular black spots between the posterior margin of postpronotal lobes and the transverse suture, and a medial black band gradually widening from anterior margin of scutum to base of scutellum; scutellum pale distally, with short brownish pilosity. Pleura pale, except anepisternum, with a medial black spot; laterotergite partly black distally. Legs. Mostly yellow, except for tarsomeres slightly brownish; coxae, trochanters and hind femora dark brown apically and hind tibiae entirely dark brown, except at extreme base. Wing as in Fig. 72. Halter reddish yellow. Abdomen. Pale with black transverse bands on tergites, except on tergite 1; black color decreasing in width from tergite 2 to 4, tergites 5–7 entirely black, also part of sternites; sternites weakly sclerotized. Female genitalia ( Figs. 32–37). Tergite 8 more or less quadrate, slightly rounded anteriorly. Sternite 8 almost quadrate ( Fig. 36), weakly sclerotized distally, narrowing towards apex; gonapophyses unsclerotized, with short lobes separated by a shallow medial incision. Tergite 9 more or less straight laterally ( Fig. 33). Genital fork with anterior arm rounded ( Figs. 32–34), distinctly narrower than posterior arm; posterolateral process wider, distally narrower than basally; membranous lobes of genital fork more rounded distally; projection of posterior margin long, rounded, with a deep medial incision; genital opening small, circular. Three spermathecae present ( Fig. 57), lateral ones with long ducts; valves only distinguishable as a widening between posterior and anterior part of ducts; spermathecal capsules circular, strongly sclerotized ( Fig. 35). Cercus with segment 1 elongate, length more than three times length of segment 2.

Male. Unknown.

Etymology. The name given is feminine and the specific epithet is named after Erwin Lindner (1888–1988), a Stuttgart-based German entomologist with a long career and a major contribution to world dipterology. He described, among his contributions to many Diptera families, the genus Arthropeina and its type-species.

Geographic distribution. Guyana and northern of Brazil (States of Acre, Rondônia and Roraima) ( Fig. 92).