Diadelophora stilbella, Ament, 2024

Ament, Danilo César, 2024, Diadelophora, a new phorid genus from central and western Brazil (Diptera: Phoridae), Zootaxa 5415 (1), pp. 144-152 : 148-149

publication ID	https://doi.org/ 10.11646/zootaxa.5415.1.6
publication LSID	lsid:zoobank.org:pub:1B0C7FD9-0AC1-4B9F-B3C1-EB7907285E3D
DOI	https://doi.org/10.5281/zenodo.10692683
persistent identifier	https://treatment.plazi.org/id/5EA7FDAB-9A1B-48E8-B4EF-609B64AA4FF2
taxon LSID	lsid:zoobank.org:act:5EA7FDAB-9A1B-48E8-B4EF-609B64AA4FF2
treatment provided by	Plazi
scientific name	Diadelophora stilbella
status	sp. nov.

Treatment

Diadelophora stilbella sp. nov.

urn:lsid:zoobank.org:act:5EA7FDAB-9A1B-48E8-B4EF-609B64AA4FF2

( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 , 3A–B View FIGURE 3 , 5A View FIGURE 5 )

Material examined. Holotype ♁, BRAZIL: Mato Grosso do Sul: Aquidauana: Res. Ecol. UEMS: Floresta Estacional Decidual , S20°25' W55°39', 11–26.ix.2011, Malaise trap, Lamas, Nihei & team col. ( MZUSP, MZ053467 ) GoogleMaps . Paratypes: BRAZIL: 10♁, Mato Grosso do Sul: Aquidauana : Res. Ecol. UEMS : Floresta Estacional Decidual, S20°26'03.7" W55°39'20.8", 11–26.ix.2011, Malaise trap, Lamas, Nihei & team col. (10♁ MZUSP, MZ053467 ; 2♁ RPSP); 8♁, same but 27.viii–11.ix.2011 ( MZUSP, MZ053468 ); 1 GoogleMaps ♁, Mato Grosso do Sul, Porto Murtinho, S21°40’ W57°46’, 1–15.xii.2011, Malaise trap, Lamas, Nihei & team col. ( MZUSP, MZ053469 ) GoogleMaps .

Diagnosis. Abdominal segments 3–5 with ventral group of long setae ( Fig. 1A View FIGURE 1 ), distiphallus with a long curved filamentous plate originating at the left lateral (observable in all specimens even without dissection, Fig. 3A–B View FIGURE 3 ).

Description. Male. Body length 2.0– 2.53 mm ( Fig. 1A View FIGURE 1 ). Head. Frons dark brown, shiny, sparsely setulose, without median furrow ( Fig. 1B View FIGURE 1 ). Flagellomere 1 yellowish-brown, large, conical. Palpus light brown, large, with small ventral setulae ( Fig. 1C View FIGURE 1 ). Gena with small setulae. Thorax. Scutum, scutellum and pleural regions dark brown, shiny; pleural sclerites almost completely bare ( Fig. 1D View FIGURE 1 ). Lateral parapsidal suture ending approximately two spiracles in length distant from the anterior spiracle ( Fig. 1D View FIGURE 1 ). All coxae and femora dark brown as well as mid- and hind tibia; foretibia and all tarsi contrastingly yellowish-brown. Foretibia with anterodorsal row of slightly stronger setulae ( Fig. 1G View FIGURE 1 ). Foretarsomere 5 twice the length of foretarsomere 4. Midtibia basal half with subtle anterodorsal and posterodorsal setal palisades ( Fig. 1H View FIGURE 1 ). Hind femur dorso-ventrally narrow, height/length ratio 0.21, with basoventral row of elongated thin setae ( Fig. 1F View FIGURE 1 ). Hind tibia with a dorsal palisade of setulae ( Fig. 1I View FIGURE 1 ). Wing ( Fig. 1E View FIGURE 1 ). Costa apically swollen, 0.55 of the wing length; R 2+3 vestigial as a tiny remnant attached to Costa; M 1 and M 2 sinuous, CuA 1 -M 2 /M 2 -M 1 ratio 2.23; CuA 1 sinuous. Halter brown. Abdomen. Tergites dark brown, shiny, setulose. Segments 3–5 with ventral group of long setae. Hypopygium dark brown, large ( Fig. 2 View FIGURE 2 ). Epandrial left and right posterior margins invaginated, continuous with a curved process under the hypoproct. Right posteroventral margin of epandrium projected posteriorly. Hypandrium right lobe expanded, occupying entire venter of hypopygium, left lobe smaller, shifted to left lateral. Hypoproct with two setae. Phallus ( Figs. 3A–B View FIGURE 3 ). Basiphallus approximately ring-shaped, extending dorsally in a core plate. Epiphallus membranous, with pointed scales. Remainder of distiphallus extremely complex, with a long curved filamentous process originating at the left lateral and probably containing the gonopore apically.

Distribution. Known from two sites in western Brazil.

Etymology. Name derived from the Greek word stilbo (glitter, shine), referring to the shiny frons, thorax and tergites of this species.

Variations. Differently from the holotype, some specimens have a lighter general color with head, thorax and tergites brown to light brown and ventral interfrontal and suprantennal setae absent.