Cluzobra triocellata, Amorim, Dalton De Souza & Oliveira, Sarah Siqueira, 2008

Amorim, Dalton De Souza & Oliveira, Sarah Siqueira, 2008, Eleven new species of the genus Cluzobra Edwards (Diptera, Mycetophilidae, Sciophilinae) from the Atlantic Forest of Brazil, Zootaxa 1920, pp. 1-28 : 4-6

Cluzobra triocellata , sp.n.

( Figs. 5 , 20 )

Diagnosis. Three ocelli, antennae brown; wing homogenously brown; Sc ending beyond origin of Rs; male terminalia with a deep mesal notch on the distal margin of the syngonocoxite, with three strong spines at the apex of each side and three additional more lateral spines; gonostyle short, strongly sclerotized.

Material examined. Holotype ɗ, BRAZIL, State of Pernambuco, Recife, Parque Dois Irmãos, 34° 55’ 59” W 08° 00’ 00” S, 20–23.vii.2002, S.T.P. Amarante & eq. cols. Paratypes. 1 ɗ, same data as holotype, but 17–20.vii.2002.

Description. Male. Head. Occiput yellowish brown, darker at vertex; three ocelli present, aligned, median ocellus relatively well developed, lateral ocelli separated from eye margin by a distance larger than ocellus diameter, ocellar area brown; front and clypeus yellowish, setose; maxillary palpus brown, 1+4 palpomeres, palpomeres increasing in length to apex; labella yellowish, except for the brownish sclerite of basal article. Scape and pedicel rounded, yellowish, setose; flagellomeres brownish, setose. Thorax. Pronotum brownish, with some longer and other smaller setae. Scutum light brown, with four yellowish longitudinal bands, intertwined with brown bands, smaller scattered setae with some stronger acrostical and dorsocentral bristles; scutellum yellowish, brown along posterior margin, six stronger scutellar bristles and some smaller setae. Pleural membrane yellowish. Proepisternum light yellowish brown. Pleural sclerites mostly light brown, mediotergite yellowish close to insertion of abdomen. Laterotergite, anepisternum and katepisternum densely setose, mediotergite with a mesal and a pair of more lateral tufts of setae. Halter with pedicel yellowish and capitulum brownish, with scattered setae. Legs. Legs mostly yellowish, coxae and base of femora brownish; tibial spurs 1:2:2, yellowish, front spur more than twice front tibial width at apex. Wing ( Figure 5 ). Length, 2.9 mm. Wing mostly brownish, slightly lighter basally. Membrane with macro and microtrichia; humeral cell with abundant macrotrichia; entire basal cell covered with macrotrichia. Sc complete, long, well sclerotized, reaching C beyond origin of Rs; R1 long, more than six times r–m length, reaching C at distal fourth of wing; R5 reaching C before apex of M1; C extending about two fifth the distance between R5 and M1; r–m oblique, shorter than base of Rs; M1+2 short; medial fork complete, base of fork slender; M4 entirely absent; A1 very short, scarcely visible. Abdomen. Abdominal tergites and sternites 1–7 orange brown. S8 U– shape, T8 wide and short. Terminalia ( Figure 20 ). Terminalia orange brown. Syngonocoxite with a mesal notch, a pair of distal extensions bearing three strong spines at apex and a group of three spines more laterally. Gonostyle small, strongly sclerotized, elongated, with no spines or setae, bearing a subapical digitiform projection. T9 with a pair of large lateral projections at anterior margin. Cercus simple.

Etymology. The name of this species is feminine and refers to the plesiomorphic presence of three ocelli.

Comments. This species is obviously related to C. yasuni Matile. It not only has plesiomorphic and apomorphic features found in the shannoni – group (presence of three ocelli and a more or less brownish wing membrane), but also shares some other apomorphies previously known only for C. yasuni (brownish color of the flagellomeres and some details of the male terminalia). Even though it is not part of the scope of this paper to make a phylogenetic analysis of the entire genus including the new species, it would not be surprising if C. triocellata , sp.n. is the closest species to C. yasuni . Details of the shape of the gonostyle and of the shape and distribution of spines of the syngonocoxite are clear enough to confer the status of a separate species.

Figures

FIGURES 5 – 10. Wings of Cluzobra species. 5. Cluzobra triocellata, sp. n. 6. Cluzobra accola, sp. n. 7. Cluzobra lanei Edwards, specimen from Anastácio, State of São Paulo. 8. Cluzobra claripennis, sp. n. 9. Cluzobra papaveroi, sp. n. 10. Cluzobra coptolithus, sp. n., paratype from Recife, State of Pernambuco.

FIGURES 20 – 22. Male terminalia of Cluzobra species. 20. Cluzobra triocellata, sp. n., lateral view. 21. Cluzobra accola, sp. n., ventral view. 22. Same, syngonocoxite plate removed. Abbreviations: ae, aedeagus; ce, cercus; sg, syngonocoxite; gs, gonostyle; s 8, sternite 8; t 8, tergite 8; t 9, tergite 9.