Robustagramma cultriforme Cui and Marshall, 2005

Marshall, Stephen A. & Cui, Yongsheng, 2005, Systematics of Robustagramma, a new genus of New World Sphaeroceridae (Diptera), Zootaxa 1026 (1), pp. 1-122 : 99-100

publication ID	https://doi.org/ 10.11646/zootaxa.1026.1.1
publication LSID	lsid:zoobank.org:pub:3EDC6787-C73B-4969-BA06-022D0532364F
DOI	https://doi.org/10.5281/zenodo.10532553
persistent identifier	https://treatment.plazi.org/id/0392570D-FFC5-4218-FEDA-AA9F8130FD15
treatment provided by	Felipe
scientific name	Robustagramma cultriforme Cui and Marshall
status	sp. nov.

Treatment

Robustagramma cultriforme Cui and Marshall View in CoL , new species

( Figs. 309–316 View FIGURES 309–316 , 374 View FIGURES 371–378 )

As described for Robustagramma flavistylum except as follows.

Body length 1.5–2.2 mm. Face, gena, and lower frons brownish yellow. Antenna brown. Inner occipital bristle slightly shorter than ocellar bristle and posteror orbital bristle. Eye height ca. 2.1–2.5 times genal height. Aristal hairs ca. 3 times basal width of arista.

Two pairs of postsutural dorsocentral bristles, anterior pair similar in length to middle prescutellar acrostichal bristles. Presutural dorsocentral setulae slightly longer than acrostichal setulae. Acrostichal setulae in 6 rows between anterior postsutural dorsocentral bristles. Wing lightly infuscated, with two transverse clear bands beyond intersection of R 2+3 and costa. Length of second costal sectors ca. 0.45–0.49X length of third. Mid tibia with a posterodoral proximal bristle, an anterodorsal bristle near middle, and two anterodorsal, a dorsal and posterodorsal distally; dorsal bristle and anterodorsal bristle before dorsal bristle small. Mid femur with 3–4 anterior bristles on distal third, and one small posterodorsal apical bristle. Mid tibia of male with an apicoventral and two rows of short and stout ventral bristles on distal half; correponding femur with 10 ventral proximal bristles in two irregular rows.

Male terminalia: Dorsomedial length of epandrium ca. 0.4X length of sternite 8. Surstylus mostly setose. Cercus at distal third nearly half as wide as its base in lateral view.

Holotype (♂, DEBU) paratypes (7 ♂, 7 ♀, DEBU): BRAZIL: Paraná. Curitiba , 30 km SE BR277, dung trap, 6–9.ii.1990, S.A. Marshall.

Other paratypes: ARGENTINA: Misiones. 5 km E Puerto Iguazo, pan traps (2 ♂, 2 ♀, DEBU) , sweep, malaise behind Hotel Orquidaes , 1–6.ii.1992, S.A. Marshall (1 ♀, DEBU) ; pan traps, dead snail, 4–5.ii.1992, S.A. Marshall (1 ♀, DEBU) ; FIT/pan/dung pans, 2– 7.ii.1992, S.A. Marshall (5 ♀, DEBU) ; BRAZIL: Paraná. Londrina, Mata dos Godoy , 28– 31.i.1990, S.A. Marshall (1 ♂, QBUM) ; Londrina , carrion/ pan traps, 1–2.ii.1990, S.A. Marshall (1 ♂, DEBU) ; Londrina, Parque Arthur Thomas , pan traps /fungi, 29.i–1.ii.1990, S.A. Marshall (1 ♀, QBUM) . Minas Gerais. 1 km E Lavras , in ditch, dung traps, 18– 20.ii.1990 (1 ♂, DEBU) ; 20 km SW Barbacena , dung traps, 25.ii.1990, S.A. Marshall (5 ♂, DEBU) .

Etymology: The specific epithet refers to the shape of the male cercus.

Comments: Robustagramma cultriforme is very similar to Robustagramma angusticauda , but differs from the latter by the transverse clear bands of the wings, and the relatively broad cercus of the male.