Diadelophora stilbella Ament 2024, sp. nov.
Creators: name: Ament, Danilo César
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Phoridae
Diadelophora
Diadelophora stilbella

description: Diadelophora stilbella sp. nov.
urn:lsid:zoobank.org:act: 5EA7FDAB-9A1B-48E8-B4EF-609B64AA4FF2
(Figs. 1, 2, 3A–B, 5A)
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). 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 ♁, Mato Grosso do Sul, Porto Murtinho, S21°40’ W57°46’, 1–15.xii.2011, Malaise trap, Lamas, Nihei & team col. (MZUSP, MZ053469).
Diagnosis. Abdominal segments 3–5 with ventral group of long setae (Fig. 1A), distiphallus with a long curved filamentous plate originating at the left lateral (observable in all specimens even without dissection, Fig. 3A–B).
Description. Male. Body length 2.0– 2.53 mm (Fig. 1A). Head. Frons dark brown, shiny, sparsely setulose, without median furrow (Fig. 1B). Flagellomere 1 yellowish-brown, large, conical. Palpus light brown, large, with small ventral setulae (Fig. 1C). Gena with small setulae. Thorax. Scutum, scutellum and pleural regions dark brown, shiny; pleural sclerites almost completely bare (Fig. 1D). Lateral parapsidal suture ending approximately two spiracles in length distant from the anterior spiracle (Fig. 1D). 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). Foretarsomere 5 twice the length of foretarsomere 4. Midtibia basal half with subtle anterodorsal and posterodorsal setal palisades (Fig. 1H). Hind femur dorso-ventrally narrow, height/length ratio 0.21, with basoventral row of elongated thin setae (Fig. 1F). Hind tibia with a dorsal palisade of setulae (Fig. 1I). Wing (Fig. 1E). 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). 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). 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.
description: Published as part of Ament, Danilo César, 2024, Diadelophora, a new phorid genus from central and western Brazil (Diptera: Phoridae), pp. 144-152 in Zootaxa 5415 (1) on pages 148-149, DOI: 10.11646/zootaxa.5415.1.6, http://zenodo.org/record/10692681