Apocephalus setissitergus, Brown, Brian V., 2012

Brown, Brian V., 2012, Revision of the Apocephalus mucronatus group of ant decapitating flies (Diptera: Phoridae), Zootaxa 3413, pp. 19-28 : 26

publication ID

https://doi.org/ 10.5281/zenodo.281916



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scientific name

Apocephalus setissitergus

sp. nov.

Apocephalus setissitergus View in CoL new species

( Figs. 8 View FIGURES 3 – 9 , 15 View FIGURES 10 – 16 , 22 View FIGURES 17 – 23 )

Species recognition. Tergite six with posterior row of extremely long setae.

Description of specimens. Body length 1.7–1.8 mm. Frons dark brown, mean frontal width 0.48, range 0.46–0.50. Median furrow present. Supra-antennal setae absent. Ventral interfrontal setae closer to midline than eye margin. Ommatidia normal sized. Flagellomere 1 rounded oval, light brown. Palpus yellow, normal sized. Scutum yellowish brown. Scutellum brown, anterior seta about two thirds length of posterior seta. Pleuron yellowish brown. Anepisternum bare. Wing normal sized, mean costal length 0.43, range 0.40–0.45. Abdominal tergites dark brown, normal sized. Tergite 6 about as broad as tergite 5, entire, apical margin straight, posterior margin with several long thick curved setae; shorter thick setae present more anteriorly on tergite. Venter of abdomen gray. Venter of segment 6 with sclerite covering posterior half of segment, with row of long thick setae, and few smaller anterolaterally. Oviscape elongate oval, anterior process broadly elongate, large lateral setae absent, dorsally bare. Dorsomedian process short. Apex broadly truncate, relatively straight. Venter with apical sclerite with triangular darkening posterolaterally; separated midventral sclerite elongate oval, with large group of thin setae near apex. Intersegment 7–8 with short rectangular sclerotization issuing laterally from oviscape. Anterior arms of stylet anteriorly parallel, well separated, relatively flat.

Distribution. Known from a single site in northwestern Costa Rica.

Derivation of specific epithet. Named for the long setae of tergite 6.

Holotype. Ƥ, Costa Rica: Guanacaste: Cerro Pedregal, Volcan Cacao, 10.93°N, 85.48°W, 1000 m, ii–iv.1989, I.Gauld, D.Janzen, Malaise trap (LACM). Paratype. 1Ƥ, same data as holotype.













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