Pradomyia hadromera

Gaimari, Stephen D., 2007, Three new Neotropical genera of Odiniidae (Diptera: Acalyptratae), Zootaxa 1443, pp. 1-16 : 8-9

Pradomyia hadromera , gen. et sp. nov. ( Figs. 1 D, 2E–F, 3C, 6A–C)

Etymology. From hadros, Greek, meaning well-developed, bulky, stout, large + meros, Greek, meaning femur, thigh, referring to the thick hind femur of the species; to be treated as a noun in apposition.

Diagnosis. Body and head brown pruinose, with some goldish brown pruinosity. Macrosetae with alveolae slightly oblong with slightly raised, darkened lip in same direction as setal orientation. Frons with 3 strong reclinate fronto-orbital setae in posterior 3/4, and 1–2 (1 on left side, 2 on right) strong inclinate fronto-orbital setae anteriorly. Lunule arched, 1/3 height of frons. Antenna yellow, including base of arista, remainder of arista black; antennal bases separated by distance less than diameter of single antennal socket. Gena lacking upturned genal seta. Dorsocentral setae 1+3; prescutellar acrostichal seta present. Prescutellum present. Scutellum arched dorsally, bare of setulae. Foretibia with 1 strong spur, and midtibia with 2 strong spurs. Wing vein C extending to R4+5; costal spinules extending to halfway point between R2+3 and R4+5.

Adults, ɗ (Ψ unknown) Body length 4.7 mm.

Head ( Fig. 2 E–F). Height 1.5 X length; width 1.2 X height. All macrosetae with alveolae slightly oblong with slightly raised, darkened lip in same direction as setal orientation. Eye only slightly higher than long. Medial and lateral vertical setae present, strong. Posterior part of head not concave in dorsal view. Frons 1.5 X wider than long. Postocellar setae strong, divergent. Ocellar triangle brown pruinose, setulose; posterior ocelli slightly closer together than distance between one posterior and anterior ocelli; ocellar setae proclinate, strong (as strong as posterior-most orbital seta). Frontal vitta brown pruinose, with vague goldish pruinose triangle tapering from ocellar triangle; with sparse fine setulae. Fronto-orbital plate gold pruinose; sparsely setulose; 3 strong reclinate fronto-orbital setae in posterior 3/4, and 1–2 (1 on left side, 2 on right) strong inclinate frontoorbital setae anteriorly. Lunule 0.2 mm high, arched; 0.3 X height of frons length; silver pruinose; lacking setulae. Antenna yellow, including base of arista, remainder of arista black; basoflagellomere round, with indentation for insertion of arista, diameter slightly smaller than height along apical edge of pedicel; arista pubescent; antennal bases separated by distance less than diameter of single antennal socket. Face silverygoldish pruinose, with antennal grooves darker. Oral vibrissa strong, with 4 additional strong subvibrissal setae in row. Gena pale goldish pruinose; 0.4 X as high as head height; with 4–5 strong setae, but none upturned; setulose. Genal groove area (below eye) orange, bare of setulae. Palpus yellow-orange; slightly laterally flattened; with several stout setulae in addition to weaker setulae. Prementum and labellum yellow, with pale setulae.

Thorax ( Fig. 1 D). All macrosetae with alveolae slightly oblong with slightly raised, darkened lip in same direction as setal orientation. Scutum 1.9 mm long, 1.3 X longer than wide; silvery-grey pruinose, with dark brown pruinose median vitta; median vitta with dense setulae, denser than adjacent areas off vitta; with lateral brown pruinose vitta from anterior part of scutum (dorsal of postpronotum) through presutural intra-alar, postsutural supra-alar, and postalar setae; additional small brown pruinose line along notopleural setae; lateral portion of scutum (below intra-alar area) lacking setulae. Prescutellum present, brown pruinose. Scutellum 0.6 mm long, 1.5 X wider than long; concolorous with scutum, with brown median vitta extending on as distinct posteriorly-directed triangle; arched dorsally. Chaetotaxy: 1+4 dorsocentrals (presutural + postsutural; posterior-most seta strongest), 1 prescutellar acrostichal (as strong as anterior dorsocentral), 1 postpronotal (along with few setulae), 2 notopleurals, 2 postsutural intra-alars (in posterior part of scutum, posterior one stronger), 1 presutural supra-alar, 2 postsutural supra-alars (posterior one stronger; additional 1–2 smaller setae slightly medial to these), 2 postalars (anterior one strongest), and 2 scutellars. Pleuron above katepisternum lacking setae or setulae except for 1 strong proepisternal seta; silvery-grey pruinose except for thin longitudinal brown pruinose stripe through anepisternum. Katepisternum more sparsely pruinose, with 3–4 strong setae along dorsal edge, in addition to numerous setulae. Legs. Brown, except yellow at apical tips of femora and proximal ends of tibiae. Foretibia with 1 strong spur, and midtibia with 2 strong spurs. Wing ( Fig. 3 C). Length 4.3 mm; 2.3 X longer than high. C extending to R4+5. Costal spinules extending to halfway point between R2+3 and R4+5. Membrane hyaline, with distinct dark spots along r-m and dm-cu crossveins; slightly darkened along C, along distal 2/3 of R2+3 and R4+5, along bm-cu crossvein, and from middle of Sc through the fork of Rs to spot along M1 just beyond bm-cu. Halter yellow.

Abdomen ( Fig. 1 D, inset). Syntergite 1+2 brown pruinose, except silvery-grey anterolaterally and along posterior edge. Tergites 1–5 setulose, with longer setulae along posterior edges; alveolae of setulae along posterior edges brown. Tergite 3–5 silvery-grey, with large paired brown pruinose patches dorsally, encompassing anterior edges of tergites but not reaching posterior edges; on tergite 3–4, the patches extend laterally into laterally visible spots. Tergite 6 absent. Sternite 6 asymmetrical; a thin sclerotized strip only present on left side; fused to sternite 7 laterally; bare. Sternite 7 separated medially, as a thin transverse sclerotized strip; asymmetrical, longer on left side; bare. Syntergosternite 7+8 small, 5.0 X wider than long; lightly sclerotized with sclerotization heaviest in patch on either side of midline; single setula on anterior part of left-hand patch, otherwise bare.

Male genitalia ( Fig. 6 A–C). Epandrium globose; setulose. Surstylus as two small lobes, separately articulating with epandrial margin; inner and outer surstylar lobes subequal in size, flattened, setulose. Hypandrium 1.5 X longer than maximum width; anterior two-thirds slightly curved dorsally, subtriangular (tapering anteriorly), with lateral edges longer than base; posterior third as broad as anterior part, tapering slightly posteriorly, shallowly U-shaped from ventral view, extending laterally around aedeagal apodeme and aedeagus as saddle. Gonopod hemispherical, terminating distally as broad, flattened, setulose lobe. Paramere small, recurved distally from ventral aspect. Aedeagus short, bulbous; membranous, covered with tiny spicules. Aedeagal apodeme rod-like, at least 1/2 length of hypandrial length (anterior tip appears broken off, so may be longer); deeply Y-shaped posteriorly. Cercus small, setulose.

Type material. Holotype ɗ (pinned, very good condition, abdomen dissected, in small vial with glycerin on same pin; Fig. 1 D), deposited in INBio, with following labels: “Est. Pitukka, 700 m, 9 km S Sta. Cecilia, P.N. Guanacaste, Prov. Guanacaste, Costa Rica, 10 a 17 jun 1992, C. Moraga, L-N 330200, 380200” / “(barcode), COSTA RICA, INBIO, CRI 000818995” / “SDG dissection 1234 ɗ” / “ HOLOTYPUS Pradomyia hadromera Gaimari. ”

Distribution. Known only from Costa Rica (Guanacaste Province).

Figures

FIGURE 1. Lateral habitus of holotypes of new species (for B – D, post-dissection state); inset is a dorsal view of each abdomen. Scale bar = 1.0 mm. A) Helgreelia albeto, sp. nov., Ψ (inset is a paratype). B) Helgreelia parkeri, sp. nov., ♂. C) Neoschildomyia fusca, sp. nov., ♂. D) Pradomyia hadromera, sp. nov., ♂.

FIGURE 2. Heads of new species. Scale bar = 1.0 mm. A – B) Helgreelia albeto, sp. nov., Ψ (holotype); A) anterodorsal view, B) lateral view. C – D) Neoschildomyia fusca, sp. nov., ♂ (holotype); C) anterodorsal view, D) lateral view. E – F) Pradomyia hadromera, sp. nov., ♂ (holotype); E) anterodorsal view, F) lateral view.

FIGURE 3. Wings of new species. Scale bar = 1.0 mm. A) Helgreelia albeto, sp. nov., Ψ (paratype). B) Neoschildomyia fusca, sp. nov., ♂ (holotype). C) Pradomyia hadromera, sp. nov., ♂ (holotype).

FIGURE 6. Pradomyia hadromera, sp. nov., ♂ (holotype). Male genitalia. Scale bar = 0.01 mm. A) Epandrial complex, dorsal view. B) Aedeagal complex, lateral view. C) Aedeagal complex, ventral view. a = aedeagus; aa = aedeagal apodeme; c = cercus; e = epandrium; g = gonopod; gl = articulated lobe of gonopod; h = hypandrium; isl = inner surstylar lobe; osl = outer surstylar lobe; p = paramere.