Arthropeina pseudofulva, 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 : 253-255

publication ID	https://doi.org/ 10.11646/zootaxa.3827.2.6
publication LSID	lsid:zoobank.org:pub:D6C800AA-8127-41D1-ACEA-52254F7CE89D
DOI	https://doi.org/10.5281/zenodo.6124282
persistent identifier	https://treatment.plazi.org/id/165ED195-90B2-48DC-AE04-04DF2BDC5F57
taxon LSID	lsid:zoobank.org:act:165ED195-90B2-48DC-AE04-04DF2BDC5F57
treatment provided by	Plazi
scientific name	Arthropeina pseudofulva
status	sp. nov.

Treatment

Arthropeina pseudofulva View in CoL , sp. nov.

( Figs. 7 View FIGURES 1 – 7 , 50–55 View FIGURES 50 – 55 , 59 View FIGURES 56 – 59 , 65 View FIGURES 60 – 65 , 76–77 View FIGURES 66 – 77 , 83 View FIGURES 78 – 83 , 89 View FIGURES 84 – 89 )

Diagnosis (female). Body color mostly whitish yellow to reddish yellow ( Figs. 83 View FIGURES 78 – 83 , 89 View FIGURES 84 – 89 ). Thorax mostly whitish yellow except for scutum reddish yellow ( Fig. 65 View FIGURES 60 – 65 ). Legs mostly whitish yellow, including hind coxa ( Fig. 89 View FIGURES 84 – 89 ). Projection of posterior margin of genital fork very short, nearly indistinguishable ( Figs. 50–52 View FIGURES 50 – 55 ). Spermathecal capsule helicoid, with three coils ( Fig. 53 View FIGURES 50 – 55 ).

Material examined. HOLOTYPE, ♀, BRAZIL, Rondônia, Campo Novo, Fazenda Amorim, 10º40.6’S 63º29’0”W, Malaise trap 6m, 06–10.xii.2011, Amorim, Ament e Riccardi col. ( MZUSP). PARATYPES: 1 ♀, BOLIVIA, Santa Cruz Dist., 4 km N Bermejo, Refugio Los Volcanes, 18°06’S 63°36’W, AR Cline, 1000m, 25–30.x.2007, Malaise trap. ( CSCA). 1 ♀ (left antenna and left wing slide–mounted), BRAZIL, Monte Negro, Fazenda Amorim, 10°40.6’S 63°29’0”W, 248m, Malaise trap, 03–15.xii.2011, Amorim, Ament e Riccardi col. ( MZUSP).

Description. Female. Length: body, 6.5–9.0 mm; wing, 6.0– 7.5 mm. Head. Vertex pale, setation whitish yellow. Upper frons reddish yellow. Flagellomeres 1–3 brownish on outer margin, paler ventrally on inner margin; flagellomeres 4–8 dark brown to black; length of eighth flagellomere five times length of seventh ( Fig. 7 View FIGURES 1 – 7 ). Palpus ( Fig. 77 View FIGURES 66 – 77 ) whitish yellow, elongate; basal segment cylindrical, length two times its width; apical segment oval, length two times its width, 1.7 times length of basal segment, both with pale hairs. Thorax ( Fig. 65 View FIGURES 60 – 65 ). Entirely whitish yellow to yellow, except scutum reddish yellow; postpronotal lobes whitish yellow, notopleural strip brownish, moderately contrasting with scutum color. Scutellum whitish yellow. Legs. Mostly reddish yellow, except for tarsomeres brownish, hind trochanters, hind femora apically and hind tibiae brown to black. Wing as in Fig. 76 View FIGURES 66 – 77 . Halter pale, knob yellow whitish. Abdomen. Reddish yellow, with black transverse bands on tergites; sternites unsclerotized; tergites mostly black, except tergite 1 with a thin transverse black distal line; tergites 7–8 weakly sclerotized. Female genitalia ( Figs. 50–55 View FIGURES 50 – 55 ). Tergite 8 wide, more or less rectangular, slightly rounded anteriorly. Sternite 8 more or less oval ( Fig. 54 View FIGURES 50 – 55 ), narrowing towards apex; gonapophyses slightly sclerotized, strongly bilobed, rounded apically. Tergite 9 wider distally ( Fig. 51 View FIGURES 50 – 55 ). Genital fork with anterior arm rounded, clearly narrower than posterior arm ( Figs. 50, 52 View FIGURES 50 – 55 ); membranous lobes of genital fork wide, rounded, covering the posterolateral process; projection of posterior margin very short; margin between posterior projections with a moderate medial incision; genital opening more or less oval, widest medially; lateral membrane of bursa sclerotized with a few microtrichia. Three spermathecae present ( Fig. 59 View FIGURES 56 – 59 ), lateral ones with short ducts, more sclerotized posteriorly, with a distinct rounded valve near middle; spermathecal capsules more or less ovoid, helicoid, with three coils, strongly sclerotized ( Fig. 53 View FIGURES 50 – 55 ). Cercus of first segment moderately compressed, wider basally than distally; length of segment 1 of cercus more than twice that of segment 2.

Male. Unknown.

Etymology. The species name is feminine and the specific epithet adds to fulva the Greek root pseudo, for false, considering its similarity with A. fulva , but actually being a different species.

Geographic distribution. Northern Brazil (State of Rondônia) and Bolivia ( Fig. 92 View FIGURE 92 ).

Comments. This species closely resembles A. fulva , mainly due to the general body color. The hind coxa color may be misleading because some specimens of A. fulva can have a yellow hind coxa, as in A. pseudofulva (see comments on A. fulva ). The antenna is also similar in both species, with the same relative lengths of flagellomeres 7–8. Nevertheless, A. pseudofulva can be easily discerned from A. fulva based on the shape of the genital fork—with the projection of the posterior margin very short, nearly indistinguishable—the shape of the genital opening, and the helicoid spermathecal capsules.

The distributions of the two species ( Fig. 92 View FIGURE 92 ) also differ. Arthropeina fulva is restricted to southern Brazil, except for a single record for the State of Mato Grosso, in western Brazil. Arthropeina pseudofulva is restricted to western Amazonia and Bolivia.