Scaptomyza hiiakae Rampasso & O’Grady, 2025

Rampasso, Augusto Santos & O’Grady, Patrick Michael, 2025, Review of Hawaiian Elmomyza species (Diptera, Drosophilidae, Scaptomyza). I. The cyrtandrae, exigua, and obscuricornis species groups, with the descriptions of nine new species, Zootaxa 5729 (1), pp. 1-42 : 33

Scaptomyza hiiakae Rampasso & O’Grady , sp. nov.

( Fig. 23 )

Diagnosis. Surstylus presents two long and slender lobes, in the dorsal and ventral regions, visible in both posterior and lateral views. The surstylar dorsal lobe extends posteriorly and presents a few long bristles in the terminal margin. The surstylar ventral lobe has a rounded base, with a long and slender projection that extends posteriorly, reaching a similar length as the cercal plates. A group of sparse bristles is found in the round base of the surstylar ventral region, whereas the apex of the slender posterior projection is densely setose.

Description. Male (n = 2). Head. Pedicel dark brown, tinged with brown. First flagellomere dark brown. Arista with 2 dorsal, 0 ventral, and about 4 short inner branches, plus terminal fork. Terminal fork deep, about 50% as long as basal segment of arista. Eyes dark red and face dark brown. Frontal vitta dark brown. Frontal triangle, fronto-orbital plates, and ocellar triangle dark brown in ground color and densely gray pollinose. Anterior reclinate inserted posterolaterally to proclinate orbital. Anterior reclinate 39% length of proclinate. Proclinate 65% length of posterior reclinate. Gena pale yellow. Subvibrissal setae 74% length of vibrissae. Mouthparts light brown, and palps dark brown with 2 black apical setae. Thorax. Scutum and scutellum dark brown and densely gray pollinose. 2 pairs of dorsocentral setae.Acrostichal setae in 6 irregular rows when counted between anterior dorsocentral setae, becoming sparse posteriorly. Basal scutellar setae divergent and apical scutellar setae cruciate. Pleura dark brown in the dorsal region, becoming light brown ventrally. 1 postpronotal and 3 katepisternal setae present. Anterior katepisternal setae 57% (52–62%) length of posterior katepisternal setae. Legs. Predominantly light brown. The front basitarsus is about 35% as long as the tibia. Wings. Hyaline without distinct pattern. Abdomen. Predominantly dark brown. Male terminalia ( Figs. 23C–E ). Male terminalia brown. Epandrium is broad, with no anterodorsal phragma, ventral, or posterior lobes. The surstylus presents two long and slender lobes, in the dorsal and ventral regions, visible in both posterior and lateral views. The surstylar dorsal lobe extends posteriorly and presents a few long bristles in the terminal margin. The surstylar ventral lobe has a rounded base, with a long and slender projection that extends posteriorly, reaching a similar length as the cercal plates. A group of sparse bristles is found in the round base of the surstylar ventral region, whereas the apex of the slender posterior projection is densely setose. Cerci undifferentiated. In lateral view, the cercal plates are two times higher than long. Bristles in the cerci and surstylar ventral lobe are very long. Measurements. TL = 0.90 (0.89–0.91) mm; WL = 2.01 (1.99–2.04) mm; TL/WL = 0.45 (0.44–0.46); HW/TL = 0.54; CI = 3.17 (3.09–3.25); 4V = 1.75 (1.68–1.82); 5X = 1.55 (1.37–1.72); 4C = 0.79 (0.75–0.83); M = 0.50 (0.47–0.53). Notes. Head of the male UHIM2016.48425 is absent.

Female (n = 2). Fits with the male in all characters, except for the color of the frontal vitta, which is yellow around the ptilinal suture and light brown in the interorbital area. Abdomen is dark brown, with continuous black bands around the tergites margins. Anterior reclinate 48% (41–54%) length of proclinate. Proclinate 64% (59–69%) length of posterior reclinate. Subvibrissal setae 65% (65–66%) length of vibrissae. Anterior katepisternal setae 51% length of posterior katepisternal setae. Measurements. TL = 0.94 (0.88–1.01) mm; WL = 2.16 (2.10–2.22) mm; TL/WL = 0.44 (0.42–0.45); HW/TL = 0.53 (0.51–0.55); CI = 3.513 ( 3.510 –3.516); 4V = 1.68 (1.65–1.72); 5X = 1.57 (1.24–1.90); 4C = 0.73 (0.71–0.75); M = 0.51 (0.44–0.58). Notes. Anterior katepisternal seta of female UHIM2016.48426 is broken.

Distribution. Hawaiian Islands : Kauaʻi.

Ecology. Unknown.

Types. The holotype male ( UHIM2016.48428 ), allotype female ( UHIM2016.48429 ), and paratypes ( UHIM2016.48425 , 48426 ) are deposited in the University of Hawaiʻi Insect Museum .

Material Examined. Holotype. 1 ♂ ( UHIM2016.48428 ) . Allotype. 1 ♀ ( UHIM2016.48429 ) . Paratypes. 1 ♂ ( UHIM2016.48425 ) and 1 ♀ ( UHIM2016.48426 ). Mōhihi, Kauaʻi, 27 Jun 1964, L. H. Throckmorton col.

Etymology. This species is named after Hiʻiaka, the goddess of hula, healing, and forests, known as Pele’s sister and protector.

Figures

FIGURE 23. Habitus of Scaptomyza hiiakae Rampasso and O’Grady, sp. nov. (specimen UHIM2016.48428), in dorsal (A) and right lateral (B) views. Scale bar = 1 mm. Male terminalia of specimen UHIM2016.48425 in posterior (C), oblique posterior (D) and left lateral (E) views. Scale bar = 0.1 mm.