Drosophila saraguru, 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 : 11-13

Drosophila saraguru sp. nov.

urn:lsid:zoobank.org:act:056F4DE6-85EE-436D-8E7C-DC300DF233F8

Fig. 6

Diagnosis

Aristae with 5 dorsal and 2 ventral branches plus terminal fork. One prominent oral bristle. Thorax yellowish brown. Legs yellow. Abdomen yellow with dorsal midline, 2 nd to 4 th tergites with triangular pigmentation which becomes thinner laterally, 5 th and 6 th tergites with a median spot. Cerci not fused to epandrium. Hypandrium shield-shaped. Gonopod bearing one long bristle. Paraphyses fused to gonopod, bearing one small bristle. Aedeagus voluminous, dorsoapically membranous, apex rounded, and two lateral sclerotized, corrugated and serrated projections.

Etymology

Named in recognition of the Saraguro people. They are a people of indigenous Kichwas in the Ecuadorian highlands. They live mainly in the south of Ecuador in Loja Province, relocated from an unknown location in Perú by the Inca in pre-Hispanic times. The word comes from the Kichwa words ‘ sara ’ = ‘corn’ and ‘ guru ’ = ‘worm’.

Material examined

Holotype

ECUADOR • ♂ (dissected, terminalia in microvial); Loja Prov., Cajanuma , 2675 m a.s.l.; 04°06′53.7″ S, 79°10′54.6″ W; 19 Nov. 2015; A. Peñafiel leg.; A. Peñafiel and V. Rafael det.; QCAZ-I 3358.

Paratype

ECUADOR • 1 ♂ (dissected, terminalia in microvial); same data as for holotype; QCAZ-I 3359 .

Description

Male Holotype external morphology: total length (body + wings) 4.45 mm, body length 2.96 mm. Body color yellowish brown.

HEAD. Aristae with 5 dorsal and 2 ventral branches plus terminal fork and fine hairs. Orbital plate yellowish brown, frontal length 0.32 mm; frontal index = 1; top to bottom width ratio = 1.58. Medial vertical seta closer to lateral vertical seta, vt index = 0.79; or1–or3 ratio = 0.88, or2–or1 ratio = 0.42. Ocellar triangle brown, ocellus yellow. Frontal vitta yellowish brown. Cheek index = 6.5. One prominent oral bristle, vibrissa index = 0.4. Carina not sulcate. Eyes yellowish red. Eye index = 1.70.

THORAX. Yellowish brown, thorax length 0.96 mm, acrostichal hairs in 6 rows between two anterior dorsocentral setae. h index = 1.13; dc index = 0.65. Scut index = 1.16. Medial katepisternal seta ½ length of anterior; sterno index = 1.8. Legs yellow.

WINGS. Yellow. Alar length 3.19 mm, alar width 1.35 mm. Alar indices: alar = 2.36; C = 4.49; ac = 1.59; hb = 0.29; 4c = 0.47; 4v = 1.21; 5x = 0.91; M = 0.28 and prox. x = 0.36.

ABDOMEN. Yellow with dorsal midline, 1 st tergite yellowish brown, 2 nd to 4 th tergites with triangular pigmentation which becomes thinner laterally, 5 th and 6 th tergites with a median spot ( Fig. 6A ).

MALE TERMINALIA. Epandrium microtrichose, with 1 lower and no upper bristles, ventral lobe of epandrium with 3 grouped bristles. Surstylus with 10 primary teeth and 10 marginal bristles on each side. Cerci not fused to epandrium ( Fig. 6B ). Hypandrium shield-shaped and sclerotized. Gonopod bearing one long bristle ( Fig. 6C ).

AEDEAGUS. Voluminous, dorsoapically membranous, apex rounded, with two lateral sclerotized, earshaped, corrugated and serrated projections. Aedeagal apodeme sclerotized, elongated and curved ( Fig. 6D–F ). Paraphyses fused to gonopod, bearing one small bristle ( Fig. 6C ).

Distribution

Known only from the type locality.

Relationship to other species

This species belongs to the tripunctata group.

Figures

Fig. 6. Drosophila saraguru sp. nov. Holotype, ♂ (QCAZ-I 3358). A. Abdomen. B. Epandrium, cerci, surstylus, decasternum. C. Hypandrium, gonopods and paraphyses in ventral view. D–F. Aedeagus in ventral, lateral and dorsal view, respectively.