Xycores igniceps Kameneva & Korneyev, 2017

Kameneva, E. P., Korneyev, V. A. & Ramos-Pastrana, Y., 2017, A New Genus, New Species And New Records Of Ulidiidae (Diptera, Tephritoidea) From Colombia, Vestnik Zoologii (Vestn. Zool.) 51 (2), pp. 125-136 : 132-134

Xycores igniceps Kameneva & Korneyev , sp. n. ( figs 12–24 )

urn:lsid:zoobank.org:act:6BBA3EF9-5A25-461F-B7EC-A1169FFC543D

M a t e r i a l e x a m i n e d. Type. Holotype Ơ, Venezuela: “ Merida; 11 km SW Sto. Domingo , 16 March 1982, G. F. & J. F. Hevel ” ( USNM) . Paratype 1 Ơ: Colombia: “ Cundin. Páramo E. Usaquén, Sept. 3, 1970 R. E. Dietz IV leg.” (dissected) ( USNM) .

Diagnosis. Medium-sized shining black flies with orange-yellow head, entirely black legs and yellowish wing (with a black costal stripe from wing base to apex of pterostigma, a round black or grey spot at R 4+5 apex, and hyaline posterior margin) clearly differing from all similar ulidiid species by the combination of elongate, apically narrowed and truncated antenna, straight face and clypeus in profile, thorax shining black except mesonotum brown microtrichose, with pair of white microtrichose vittae, wing with short pterostigma not reaching r-m level, entirely black legs including tarsi, abdomen narrowly oval, entirely shining black, with narrow sternites and pleural membrane, male genitalia with 5 subequal prensisetae forming one row at posterobasal margin of surstylus; phallus moderately short, devoid of scales or spines, except one pair of needle-like spines at its mid-length. It can be recognized from habitually similar species of Seioptera and Pseudoseioptera by having straight face, wide palp, 2 anepisternal and 1 katepisternal setae (in compared species, face incised in profile, clypeus convex, 0 anepisternal and 2 katepisternal setae), from Proteseia steyskali Hernandez & Kameneva, 1998 by straight face, oval, yellow palp (face concave in profile, palp black, triangular in Proteseia ), as well as by narrow and long antenna more than twice as long as wide (1.5 times as long as wide, widely rounded in Seioptera , Pseudoseioptera , and Proteseia ); from most Herina species, which often have narrowed antenna, subtriangular palp, similar wing pattern, and more than 2 prensisetae, the new species can be distinguished by the straight, receding clypeus (convex and anteriorly produced in Herina ), short pterostigma (R 1 meets costa distally of r-m level in Herina ), and mid tibia with two ventral and two dorsal spur-like subapical setae (one long ventral seta in Herina ). Xycores igniceps sp. n. differs from all known Ulidiidae species by its bare phallus with a pair of strong spines at its mid-length.

Description. Description. Male. Head ( figs 14–16 ) ratio (length: height: width) = 1:1.40:1.41, mostly yellow. Frons ( fig. 15 ) 1.3 times as long as wide, orange yellow with black ocellar triangle; orbits silver-white microtrichose, reddish yellow; parafacial moderately narrow, white microtrichose. Frontal setulae black, proclinate or, in the middle, inclinate. Lunula orange. Eye 1.8 times as high as long. Face as long as wide in its narrowest portion; its surface silvery tomentose in its upper half, between antennae and in antennal grooves, shining black to brown in lower half, with the lower lateral corners yellow, often semi-transparent. Clypeus shining yellow. Gena orange yellow. Occiput yellow at margins, brownish-yellow medially. Antenna brownish yellow; scape and pedicel with black setulae; first flagellomere brown antero-dorsally, whitish microtrichose, 2.8 times as long as wide, apically narrowed, truncated or narrowly rounded at apex; arista black, bare. Mouthparts black, prementum black, shining. Palp yellow, black in basal 1/6, with sparse and short black setulae.

Thorax ( figs 12, 13, 17 ) black, with bluish sheen on pleura, mesonotum sparsely brownish microtrichose, with pair of white microtrichose vittae submedially. Scutum 1.3 times as long as wide; black setulose, with 13–15 setulae and 2 dorsocentral setae in microtrichose field and four rows of setulae between whitish microtomentose vittae. Scutellum black, shining, sparsely microtrichose, flattened. Subscutellum shining, dark brown. Mediotergite shining black. Set of setae normal for the genus, anterior supraalar seta 0.75 times as long as the posterior one. All the setae and setulae black.

Wing ( fig. 18 ) yellow tinged, hyaline along posterior margin, 2.7–2.8 times as wide as long; cells bc, c, and sc dark brown. Apical spot at R 4+5 round, pale brown. Calypter brown, with black ciliae. Haltere creamy white.

Legs ( fig. 12 ) entirely black, with black setae and setulae. Mid tibia ventrally with pair of strong unequal spur-like setae longer than tibia width and dorsally with two subapical erect setae slightly shorter than tibia width.

Abdomen ( figs 19–20 ) entirely shining black, with bluish sheen except pleural membrane opaque; setulae and setae black. Sternites 3-5 conspicuously longer than wide. Abdominal pleural membrane narrower than sternites ( fig. 20 ). Postabdomen as described for the genus. Each surstylus with five prensisetae in its proximal half. Pregonites with 2 setulae.

Female unknown.

Etymology. The species name is a Latin adjective meaning “fire-headed”, reflecting the reddish-yellow head coloration contrasting with entirely black body and legs.

We wish to express our sincere thanks to David Clements for reading this manuscript and useful critical comments. Specimens studied were borrowed or examined through the kindness of David G. Furth and Allen L. Norrbom (SEL USDA, material deposited in the USNM) in 2001. This paper is originated from the project partly supported by the travel grant for EPK from the Curtis Sabrosky Fund (USNM & SEL BARC USDA, Washington, D.C.) in 2001. Collecting work of YRP was done as a part of the Project 113171249749 — 49749- 2015 from the Universidad de la Amazonia and Colciencias.

Figures

Figs 12–19. Xycores igniceps (12–14, 17 — holotype Ơ from Venezuela, 15–16, 18–19 — paratype Ơ from Colombia): 12 — label and habitus, lateral left view, 13 — habitus, dorsal view, 14–16 — head, 17 — mesonotum, 18 — wing, 19 — abdomen (14 — lateral left, 15, 17–19 —dorsal, 16 — posterior view and label).Scale bar 1 mm.

Figs 20–24. Xycores igniceps (paratype Ơ from Colombia): 20 — abdomen, ventral view, 21–22 —epandrium and phallus, 23–24 — epandrium, hypandrium and phallus (21 — posterior, 22 — postero-ventral, 23 — lateral right, 24 — ventral view). Abbreviations: ej ap — ejaculatory apodeme, ph — phallus, phad — phallapodeme, pregon — pregonite, prset — prensisetae, sst — surstylus.