Phthinia urubici, Oliveira, Sarah Siqueira & Amorim, Dalton De Souza, 2010

Oliveira, Sarah Siqueira & Amorim, Dalton De Souza, 2010, The genus Phthinia Winnertz (Diptera, Mycetophilidae) in the Neotropical region, with the first records from Brazil, Zootaxa 2350, pp. 22-34 : 26-28

Phthinia urubici , sp.n.

( Figs. 2 , 6 )

Diagnosis. Sc reaching C well before basal end of r-m; first sector of Rs slightly oblique; M1+2 about half the length of r-m; gonocoxite with an anterior distal projection ending beyond gonostyle; gonostyle with a pair of dorsal elongated projections, one of them well sclerotized, one quite translucid.

Material examined. Holotype. 3, BRAZIL, State of Santa Catarina, Urubici , Morro Igreja, 28° 00’ 05,0” S 49° 35’ 30” W, 18.viii.2005 - 06.i.2006 (Pinho & Bizzo cols.). Paratypes. 1 3, same data as holotype; 1 3 idem, except Urubici , 05.xii.2004 - 08.ii.2005 (Bizzo & Hugo cols.).

Description. Male. Head. Vertex yellow, setose; three ocelli, aligned, lateral ocelli larger than mid ocellus; occiput brown; eyes setose. Scape and pedicel rounded, yellow, with a distal aureole of setae; 14 yellow, elongate flagellomeres, with scattered setae, with no distal neck, flagellomeres in contact with each other, first flagellomere longer, about 1.4 the length of flagellomere 2, flagellomeres 2-14 longer than combined length of scape and pedicel. Front and clypeus yellow, setose; labella yellow; four yellow palpomeres increasing in length to apex, first and second short, rounded, third and fourth elongate, fourth twice length of third. Thorax. Thorax yellow. Pronotum setose. Scutum short, strongly arched, covered with scattered small setae and rows of stronger dorsocentrals and acrosticals; scutellum setose, two mesal scutellar bristles. Pleural membrane setose along margin of anterior spiracule. Mediotergite setose laterally; laterotergite setose on posterior half. Halter yellow. Legs. Legs yellow, long and slender; first tarsomere of anterior leg about twice length tibia. Tibial spurs 1:2:2, short, approximately as long as tibial width at apex. Wing ( Fig. 2 ). Length, 4.0 mm. Width, 1.3 mm. Membrane hyaline, densely covered with macrotrichia, microtrichia regularly distributed over the membrane. C extending about half the distance between Rs and M1, ending at wing apex; Sc complete, short, reaching C before anterior apex of r-m; sc-r present, in a basal position; R1 long, reaching C at about distal fifth of wing; first sector of Rs only slightly oblique; r-m long, nearly longitudinal, more than three times length of first sector of Rs; M1+2 present, short, less than half length of r-m; medial fork complete, M1 not sinuous at apex; cubital fork complete, M4 originating beyond medial fork, about a third of length of first sector of CuA; apex of CuA strongly arched towards base; A1 ending far from wing margin, before origin of M4. Abdomen. Abdomen yellow, setose, long and slender. Terminalia ( Fig. 6 ). Distal margin of syngonocoxite at level of insertion of gonostyles, gonocoxite extending quite beyond apex of gonostyle; gonostyle complex, with a long digitiform, sclerotized dorsal extension and an additional rather translucent blade, three stronger setae at dorsal face, and additional scattered setae ventrally; tegmen wide distally, translucent; aedeagus rather long, well sclerotized; sternite 10 sclerotized, bilobed, with a pair of distal setae at each lobe; tergite 9 entirely divided into two setose lobes, connected by a thin membrane mesally; cercus lobose. Female. Unknown.

Etymology. Feminine. This species name refers to the type-locality of the species used in apposition.

Comments. Despite many similarities between P. theresae , sp.n. and P. urubici , sp.n., the latter species can be easily recognized by the distinctive shape of the gonostyle. In P. urubici , sp.n. the gonostylus shows a sclerotized digitiform dorsal extension and an additional more translucent blade, besides three stronger setae at the dorsal face. On the other hand, in P. theresae , sp.n. the gonostylus is short, obovoid, with a sclerotized tooth at apex, and three spine-like setae distally.

Figures

FIGURE 6. Male terminalia of Phthinia urubici, sp. n., dorsolateral view. Paratype. Abbreviations: Ae, aedeagus; Ce, cercus; Gc, gonocoxite; Gs, gonostylus; S 10, sternite 10; T 9, tergite 9; Tg, tegmen.

FIGURES 1 – 4. Wings of Phthinia. 1. P. t h ere s a e, sp. n. Holotype. 2. P. urubici, sp. n. Paratype. 3. P. freemani, sp. n. Paratype. 4. P. parafurcata, sp. n. Paratype. Scale: 0.5 mm.