Pieza globosa Ramos-Pastrana, Cordoba-Suarez & Evenhuis 2023, sp. nov.
Creators: name: Ramos-Pastrana, Yardany
name: Córdoba-Suarez, Eric
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Mythicomyiidae
Pieza
Pieza globosa

description: Pieza globosa Ramos-Pastrana, Córdoba-Suarez & Evenhuis, sp. nov.
Figs 1–15, 22
Diagnosis. Ocellar triangle dark brown to black; mesonotum with three thick brown longitudinal bands; coxae, femora and tibia entirely whitish yellow; vein R 2+3 straight, vein dm -m slight sinuous, vein m -m absent; epandrium with base conical-shaped and apex rounded; pseudo-surstylus thickened, pointed in lateral view; ejaculatory apodeme rounded; lateral ejaculatory process thickened, pointed, sideways-directed in dorsal view; phallus funnelshaped; anterior arms of parameral sheath long, slightly curved, broadened apically; gonocoxite elongate, thin and esclerotized, with inner and upper margins sinuous and apex rounded; gonostylus rectangular, with apex short, hook-shaped; parameral sheath large, sub-ovoid shaped in lateral view, conical-shaped, with rounded apex in dorsal view.
Description. MALE (holotype). Body length 1.2 mm; wing length 0.8 mm. Head (Figs 1–2). Brown; eyes separated at vertex by approximately 3× distance posterior ocelli; ocellar triangle dark brown to black, ocelli whitish yellow; frons whitish yellow on external margins and brown on internally, both areas sinuously separated, shiny, notably depressed medially, with conspicuous black seta laterally (Fig. 2); face whitish yellow on the lower ⅔, dark brown on the upper ¼ and a marginal longitudinal line light brown, slightly projecting beyond eye in lateral view; proboscis brown on the proximal ⅔, dark brown on distal ¼, with approximately the same length of head; oral cavity whitish yellow; occiput subshiny, light brown to brown, with sparse brown and small setae (Fig. 2). Antenna (Figs 1–3) dark brown yellowish pruinose; scape minute; pedicel oval; first flagellomere oval, about 1.4× longer than width; second flagellomere small, about the width of first, with small subapical stylus. Thorax (Figs 1, 4). Mesonotum light brown ground color and interhumeral triangle, with dense brownish yellow pruinosity, scattered dark brown setae and with three thick light brown longitudinal bands, the central band occupies the entire length of the prescutum to approximately half the length of the scutum, the two lateral bands start approximately at the middle of the prescutum up to the entire length of the scutum; whitish yellow to dark yellow markings on: submedian stripe from interhumeral triangle to prescutellar region, postpronotal lobe, postalar callus, notopleural area, supra-alar area; and scutellum whitish yellow, with sparse brown setae (Fig. 4); pleura brown, with sparse gray-yellowish pruinosity, with whitish yellow markings on: proepimeron, dorsal ¼ katepisternun, all katepimeron and katatergite (Fig. 1). Legs (Fig. 1). Coxae, femora and tibia entirely whitish yellow; tarsi brown to dark brown. Wing (Fig. 5). Subhyaline, slightly tinged with brown color, short and completely microtrichose; veins brown, costal vein, veins Sc, R 2+3, R 4+5 and CuA + CuP a little more stained; costal vein ending at ¼ distance between veins R 4+5 and M 1; vein Sc incomplete, ending a little later than of Rs origin; Rs evanescent at connection with R 1; R 2+3 arising approximately ⅔ distance from origin of Rs to r -m crossvein; r -m crossvein at basal 1/7 of dm cell; cell dm narrowed apically; vein m -m absent; vein dm -m slight sinuous; R 4+5 slightly curved to wing margin, ending slightly after the M 1; vein M 1 curved, downward directed; M 2 and M 4 slightly sinuous. Abdomen (Figs 1, 6). Brown, brownish pruinose; covered with conspicuous brown setae, uniform in length; tergite 1 brown dorsally, with a spot whitish yellow in the distal margin, whitish yellow laterally; tergites 2–4 brown to dark brown with a band whitish yellow in the distal margin; tergites 5–8 predominantly whitish yellow. Terminalia (Figs 7–12). Epandrium subrectangular, ventral margin about 0.8× longer than dorsal, anterior margin slightly curved, posterior margin clearly curved, upper lateral surface with setae in lateral view (Figs 7–8); epandrium with outer and inner margins sub-rounded in posterior view (Figs 9–10); epandrium bulging, outer margins rounded and inner margins sinuous in ventral view (Figs 11–12). Pseudo-surstylus not evident. Cercus semi-circular, with a depression on the upper outer margin and outer margin with a row of setae, clearly projecting posteriorly in lateral view (Figs 7–8), cercus bulging with inner margins straight, outer and upper margins rounded, lower margins sinuous and tuff setae medially in posterior view (Figs 9–10). Ejaculatory apodeme large, rounded in lateral view (Figs 7–8), sub-rounded in ventral view (Figs 11–12). Lateral ejaculatory process thickened, pointed, sideways-directed in ventral view (Figs 11–12), not evident in lateral view. Phallus funnel-shaped, anterior margin convex in ventral view (Figs 11–12), basiphallus about ¼ length distiphallus, distiphallus simple with single apical opening, about 1.5× longer than basiphallus in ventral view (Figs 11–12). Parameral sheath large, sub-ovoid shaped basally, projected posteriorly in rectangular shaped in lateral view (Figs 7–8), conical-shaped, with rounded apex and two projections posteriorly apically in ventral view (Figs 11–12). Anterior arms of parameral sheath long, slightly curved, broadened apically in lateral view (Figs 7–8), thin and convergent in ventral view (Figs 11–12). Gonocoxite membranous, elongated, base conical-shaped and apex rounded parasol-shaped, with scattered setae dorsally in lateral view (Figs 7–8), ovoid, with scattered setae dorsally in ventral view (Figs 11–12). Gonostylus not evident. FEMALE. (Figs 13–15). Similar to male, differing in the following aspects. Prescutum with a triangular spot whitish yellow laterally; anepisternum and anepimeron whitish yellow on the upper ½ (Figs 1a, 13a). Genitalia (Figs 14–15). Genital fork U-shaped, anterior margin arched with lobe ventrally, inner posterior projection convergent distally, not interrupted medially, outer projection simple, long and divergent, projecting posterolaterally (Figs 14–14a, 15); common duct indistinct, basal plate hyaline; sperm pump rounded, with smooth surface and membranous (Figs 14–14a, 15); proximal spermathecal duct about 5–6× wider than distal (Figs 14–14a, 15); distal spermathecal duct about 2.5× length of proximal duct, translucent (Figs 14–15); valve indistinct; spermathecal reservoir strongly sclerotized, brown, slightly sinuous, apex with appearance divided as if forming a head, almost the same length as sperm pump, without glandular trichomes (Figs 14–14b, 15).
Type material. HOLOTYPE. Male: COLOMBIA, Antioquia, Sabanalarga, Vda.[Vereda] Boca de Niquia, 6º52′04″N / 75º50′25″W, 448 m [eters], 28–29. Ene [I].2019, Captura con trampa Malaise en BST [Bosque Seco Tropical] (Vegetación secundaria baja), Y. Ramos-Pastrana Leg. (1 Ô LEUA-55136) (photographed specimen). PARATYPES. idem (1 ♀ LEUA-55137) (photographed specimen); idem 6º52′02″N / 75º50′19″W, 421 m [eters], (1 Ô LEUA-55138); idem (1 Ô LEUA-55139); idem (1 ♀ LEUA-55140); idem (1 ♀ LEUA-55141); idem (1 ♀ CEUA-109654); idem 6º52′06″N / 75º50′17″W, 424 m [eters], (1 ♀ CEUA-109655); idem (1 ♀ LEUA-55142); idem (1 ♀ LEUA-55143); idem 6º51′53″N / 75º50′27″W, 425 m [eters], 17–18. Mar [I].2019, (1 Ô LEUA-55144); idem 6º52′01″N / 75º50′28″W, 430 m [eters], (1 ♀ LEUA-55145); idem (1 ♀ LEUA-55146); idem 6º52′01″N / 75º50′10″W, 1237 m [eters], (1 ♀ LEUA-55147); idem 6º52′04″N / 75º50′25″W, 448 m [eters], 28–29. Ene [I].2019, (1 Ô LEUA-55148); idem (1 Ô LEUA-55149); idem (1 Ô LEUA-55150); idem (1 Ô LEUA-55151); idem (1 Ô LEUA-55152); idem (1 Ô LEUA-55153); idem (1 ♀ LEUA-55154); idem (1 ♀ LEUA-55155); idem (1 ♀ LEUA-55156); idem (1 ♀ LEUA-55157); idem (1 ♀ LEUA-55158); idem (1 ♀ LEUA-55159); idem (1 ♀ LEUA-55160); idem (1 ♀ LEUA-55161); idem (1 ♀ LEUA-55162); idem (1 ♀ LEUA-55163); idem (1 ♀ LEUA-55164); idem (1 ♀ LEUA-55165); idem (1 ♀ LEUA-55166); idem (1 ♀ LEUA-55167); idem (1 ♀ LEUA-55168); idem (1 ♀ LEUA-55169); idem (1 ♀ LEUA-55170); idem (1 ♀ LEUA-55171); idem (1 ♀ LEUA-55172); idem (1 ♀ LEUA-55173); idem (1 ♀ LEUA-55174); idem (1 ♀ LEUA-55175); idem (1 ♀ LEUA-55176); idem (1 ♀ LEUA-55177); idem (1 ♀ LEUA-55178); idem (1 ♀ LEUA-55179); idem (1 ♀ LEUA-55180); idem (1 ♀ LEUA-55181); idem (1 ♀ LEUA-55182); idem (1 ♀ LEUA-55183); idem (1 ♀ LEUA-55184); idem (1 ♀ CEUA-109656); idem (1 ♀ CEUA-109657); idem Buriticá, Vda. [Vereda] La Angelina, 6º41′43″N / 75º50′36″W, 479 m [eters], 2–3. Feb [II].2019 (1 ♀ LEUA-55185); idem 6º41′8″N / 75º50′42″W, 525 m [eters], 8–9. Mar [III].2019 (1 ♀ LEUA-55186); idem (1 ♀ LEUA-55187); idem 6º41′39″N / 75º50′47″W, 725 m [eters], 2–3. Feb [II].2019, Cultivo (1 ♀ LEUA-55188); idem 6º41′10″N / 75º50′10″W, 1237 m [eters], 31. Ene. [I]–1. Feb [II].2019, (Vegetación secundaria alta) (1 ♀ LEUA-55189); idem (1 ♀ LEUA-55190); idem (1 ♀ LEUA-55191); idem (1 ♀ LEUA-55192); idem (1 ♀ LEUA-55193); idem (1 ♀ LEUA-55194); idem (1 ♀ LEUA-55195); idem 6º41′21″N / 75º50′15″W, 1144 m [eters], (1 ♀ LEUA-55196); idem 1–2. Feb [II].2019 (1 ♀ LEUA-55197); idem (1 ♀ LEUA-55198); idem Vda. [Vereda] Buena Vista, 6º51′43″N / 75º55′43″W, 486 m [eters], 16–17. Mar [III].2019 (1 ♀ LEUA-55199); idem Liborina, Vda. [Vereda] La Sucia, 6º40′54″N / 75º19′52″W, 592 m [eters], 31. Ene. [I]–1. Feb [II].2019, (Vegetación secundaria baja) (1 ♀ LEUA-55200); idem 1–2. Feb [II].2019 (1 ♀ LEUA-55201).
Etymology. From the Latin ‘ globōsus ’ (= globe), and refers to the shape of the ejaculatory apodeme in the male terminalia and shape of the sperm pump in the female terminalia.
Geographical distribution. Colombia (Antioquia) (Fig. 22).
Habitat. The specimens were collected in the Tropical Dry Forest with low secondary vegetation and Tropical Humid Forest with dense secondary vegetation of the Andean region of Colombia (Fig. 24).
Taxonomic notes. Pieza globosa sp. nov. is similar to Pieza sinclairi from the Galápagos in having front yellow to white, scutellum yellow to brown, prescutellar mark present, abdominal tergites brown, yellow color, if present, restricted to fascia on posterior margin, occiput swollen posteriorly [Figs 1, 4, 6 and see figure 6 in in Evenhuis (2002)]. It differs from P. sinclairi by having the eyes separated at vertex by approximately 3× distance posterior ocelli (versus eyes separated at vertex by approximately 2× distance posterior ocelli); second flagellomere elongated (Fig. 3) [versus second flagellomere rounded, see figure 1 in Evenhuis (2002)]; occiput without paired pollinose diadema (Fig. 1); [versus occiput with paired pollinose diadema, see figure 6 in Evenhuis (2002)]; wing with vein R 2+3 straight (Fig. 5) [versus wing with vein R 2+3 sinuous, see figure 22 in Evenhuis (2002)]; vein dm-m slight sinuous (Fig. 5) [versus vein dm-m slight straight, see figure 22 in Evenhuis (2002)]; vein m -m absent (Fig. 5) [versus vein m -m present, see figure 22 in Evenhuis (2002)]. In males: gonocoxite rectangular-shaped in lateral view (Figs 7–8) [versus gonocoxite narrow elliptical-shaped, see figure 20a in Evenhuis (2002)]; epandrium conical-shaped, with scattered setae dorsally in lateral view (Figs 7–8) [versus epandrium rectangular-shaped, without setae dorsally in lateral view, see figure 20a in Evenhuis (2002)]; anterior arms of parameral sheath with truncated apex in lateral view (Figs 7–8) [versus anterior arms of parameral sheath with rounded apex in lateral view, see figure 20a in Evenhuis (2002)]; ejaculatory apodeme rounded in lateral view (Figs 7–8) [versus ejaculatory apodeme sub-oval in lateral view, see figure 20a in Evenhuis (2002). In females: genital fork U-shaped, with outer margins sinuous, anterior margin arched with lobe ventrally (Figs 14–14a, 15) [versus genital fork O-shaped, with outer margins straight, anterior margin arched with acute projection, see figure 19 in Evenhuis (2002)]; outer projection about 4× length of inner projection (Figs 14–14a, 15) [versus outer projection about 1.2× length of inner projection, see figure 19 in Evenhuis (2002)]; sperm pump rounded (Figs 14–14a, 15) [versus sperm pump flared, see figure 19 in Evenhuis (2002)]; spermathecal reservoir without glandular trichomes (Figs 14–14b, 15) [versus spermatheca reservoir with glandular trichomes, see figure 19 in Evenhuis (2002)].
description: Published as part of Ramos-Pastrana, Yardany & Córdoba-Suarez, Eric, 2023, First records of Pieza Evenhuis, 2002 (Diptera: Mythicomyiidae: Mythicomyiinae) from Colombia, with description of a new species from arid zones of a Tropical dry forest, pp. 364-374 in Zootaxa 5343 (4) on pages 365-370, DOI: 10.11646/zootaxa.5343.4.4, http://zenodo.org/record/8334482