Diadelophora inornata, Ament, 2024

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

Diadelophora inornata sp. nov.

urn:lsid:zoobank.org:act:E1ACAF57-4262-4B5D-9D06-AB90CD09A723

( Figs. 3C , 4 , 5B )

Material examined. Holotype ♁, BRAZIL: Minas Gerais: Porteirinha: Parque Estadual de Serra Nova, 15°43'18.4"S 43°50'22.1"W, 7–13.xii.2015, Malaise trap, 1044m, Diversidade Aculeata Serra do Espinhaço , L. N. Perillo col. ( UFMG IDI 1800988 , SISBIO 42055-2 ) . Paratype: 1♁, same but 15°43'15.0"S 43°50'16.3"W, 1040 m ( UFMG IDI 1800990 , SISBIO 42055-2 ) .

Diagnosis. Smaller, 1.65 mm of body length, abdominal segments 3–5 with few short ventral setae, distiphallus without long curved process, epiphallus with rounded and pointed scales.

Description. Male. Body length 1.65 mm ( Fig. 4A ). Head. Frons brown to dark brown, shiny, sparsely setulose, without median furrow ( Fig. 4B ). Flagellomere 1 yellowish-brown, large, conical. Palpus light brown, with small ventral setulae. Gena with small setulae. Thorax. Scutum, scutellum and pleural regions brown to dark brown, shiny; pleural sclerites almost completely bare ( Fig. 4D ). All coxae and femora brown as well as mid- and hind tibia; foretibia and all tarsi contrastingly yellowish-brown. Lateral parapsidal suture ending less than one spiracle in length distant from the anterior spiracle, meron dorsally slightly convex ( Fig. 4D ). Fore and midtibia without discernible rows or palisades of setulae ( Fig. 4G–H ). Foretarsomere 5 longer than foretarsomere 4. Hind femur dorso-ventrally narrow, height/length ratio 0.23, with basoventral row of elongated thin setae ( Fig. 4F ). Hind tibia with a subtle dorsal palisade of setulae ( Fig. 4I ). Wing ( Fig. 4E ). Costa apically swollen, 0.46 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 1.69; CuA 1 sinuous. Halter light brown.

Abdomen. Tergites dark brown, shiny, setulose. Venter of segments 3–5 with few short setae. Hypopygium brown, large, without conspicuous differences to D. stilbella . Phallus ( Figs. 3C ). Basiphallus approximately ring-shaped. Epiphallus membranous, with rounded and pointed scales. Remainder of distiphallus extremely complex, without long curved process.

Distribution. Known from a single site in central-northeast Brazil.

Etymology. Derived from the Latin word inornatus (unadorned) referring to the absence of the striking features of the diagnosis of D. stilbella .

Figures

FIGURE 3. A, B, Phallus of Diadelophora stilbella sp. nov. in left lateral (A) and dorsal view (B); C, phallus of Diadelophora inornata sp. nov. in left lateral view. Abbreviations: bs, basiphallus; cp, core plate; epi, epiphallus; ra, right arm.

FIGURE 4. Diadelophora inornata sp. nov., male. A, habitus (holotype); B, head in dorsal view; C, microscopic details of the first flagellomere of the antenna (MEV); D, thorax in lateral view; E, wing; F, hind femur; G, foretibia; H, midtibia; I, hind tibia.

FIGURE 5. Wing interference patterns of (A) Diadelophora stilbella sp. nov. and (B) Diadelophora inornata sp. nov. C, methodology for WIPs comparison in a horizontal line between wing veins M1 and M2. The line chosen for standardized comparison is illustrated as the white arrow, dashes in it represent changes between the main WIP colors observed; under the line it is shown the sequence of WIPs observed in this line for this species and their respective extensions. In the bottom, Newton series scale for two-beam thin-film interference colors calibrated for the refractive index of chitin (1.57) to indicate wing thickness in nanometers (from Shevtsova et al., 2011), and its correspondence to the colors observed in the horizontal line. D, comparison of the WIPs observed in the horizontal line between M1 and M2 of the two Diadelophora species; lines indicate the correspondence of WIPs (same thickness) and numbers indicate the wing thickness estimated for those parts of the stripes (in nanometers).