Drosophila kurillakta, Peñafiel-Vinueza & Rafael, 2019

Peñafiel-Vinueza, Ana Danitza & Rafael, Violeta, 2019, Five new species of the Drosophila tripunctata group (Diptera: Drosophilidae) from Podocarpus National Park, Ecuador, European Journal of Taxonomy 494, pp. 1-18 : 7-9

Drosophila kurillakta sp. nov. urn:lsid:zoobank.org:act:DA3AF41D-2B1A-477D-B081-1F6E809A9AD2

Fig. 4

Diagnosis

Aristae with 6 dorsal and 3 ventral branches plus terminal fork. Vibrissa prominent. Thorax yellowish brown. Legs yellow. Wings yellow, bM-Cu clouded. Cerci not fused to epandrium. Hypandrium shieldshaped. Paraphyses microtrichose, fused to gonopod. Gonopod elongate bearing one long bristle. Aedeagus with sclerotized and membranous areas, and two lateral sclerotized and serrated projections, strongly flattened laterally.

Etymology

In the Kichwa language, ‘ kurillakta ’ refers to ‘ kuri ’ = ‘gold’, and ‘ llakta ’ = ‘land’. Zamora Chinchipe Province is known for its gold mines. It is therefore called the land of gold.

Material examined

Holotype

ECUADOR • ♂ (dissected, terminalia in microvial, dry mounted); Zamora Chinchipe Prov., San Francisco , 2190 m a.s.l.; 03°59′16.7″ S, 79°05′35″ W; 23 Apr. 2015; A. Peñafiel leg.; A. Peñafiel and V. Rafael det.; QCAZ-I 3355.

Description

Male Holotype external morphology: total length (body + wings) 3.84 mm, body length 3 mm. Body color yellow.

HEAD. Aristae with 6 dorsal and 3 ventral branches plus terminal fork and small hairs, flagellomere yellowish brown. Orbital plate yellowish brown, frontal length 0.39 mm, frontal index = 0.84, top to bottom width ratio = 1.39. Medial vertical seta closer to lateral vertical seta and slightly towards outer edge of orbital plate, vt index = 0.4, or1–or3 ratio = 0.84, or2–or1 ratio = 0.59. Ocellar triangle brown, ocellus yellow; frontal triangle yellowish brown. Frontal vitta yellowish brown. Gena and postgena yellowish brown, cheek index = 5.9. Vibrissa prominent, vibrissa index = 0.38. Carina not sulcate. Proboscis yellow. Red eyes, eye index = 1.20.

THORAX. Yellowish brown, acrostichal hairs in 6 rows between two anterior dorsocentral setae, h index could not be calculated (broken setae on holotype), dc index = 0.63. Scutellum yellowish brown, basal scutellar setae divergent, scut index = 1.45. Medial katepisternal seta slightly smaller than anterior, sterno index = 1.16. Legs yellow.

WINGS. Yellow, bM-Cu clouded. Alar length 3.34 mm, alar width 1.35 mm. Alar indices: alar = 2.47; C = 4.32; ac = 2.24; hb = 0.33; 4c = 0.49; 4v = 1.19; 5x = 0.94; M = 0.28 and prox. x = 0.33.

ABDOMEN. Unknown, holotype in poor condition.

MALE TERMINALIA. Epandrium microtrichose, ventral lobe bearing one bristle. Surstylus triangular with 8 primary teeth on each side, on left side a gap between 5 th and 6 th teeth; 9 marginal bristles on right side and 12 on left ( Fig. 4A ). Hypandrium sclerotized, shield-shaped, same size as epandrium. Gonopod elongate, bearing one long bristle ( Fig. 4B ).

AEDEAGUS. Distally widened with a deep cleft, with sclerotized and membranous areas, and two lateral sclerotized and serrated projections, strongly flattened laterally. Ventral rod barely noticeable. Aedeagal apodeme membranous ( Fig. 4C–E ). Paraphyses sclerotized and microtrichose, fused to gonopod.

Distribution

Known only from the type locality.

Relationship to other species

This species belongs to subgroup IV of the tripunctata group. The general shape of the male terminalia suggests a relationship with Drosophila loewi Vilela & Bächli, 2000 from Yucatán, Mexico.

Figures

Fig. 4. Drosophila kurillakta sp. nov. Holotype, ♂ (QCAZ-I 3355). A. Epandrium, cerci, surstylus, decasternum. B. Hypandrium, gonopods and paraphyses in ventral view. C–E. Aedeagus in ventral, lateral and dorsal view, respectively.