Argentinomyia ivani Montoya, 2023

Montoya, Augusto L. & Wolff, Marta, 2023, Taxonomic revision of the Neotropical genus Argentinomyia Lynch-Arribálzaga, 1891 (Diptera: Syrphidae), with description of 16 new species, Zootaxa 5234 (1), pp. 1-157 : 64-66

Argentinomyia ivani Montoya sp. nov.

Proposed standard English name: Ivan’s long-antennae flower fly.

( Figs 35 , 36 and 91A )

Argentinomyia sp. COL-21 (11) Montoya 2019, unpublished

Type material. HOLOTYPE. Adult Male , pinned, deposited at Colección Entomológica Universidad de Antioquia. Original label: “ COLOMBIA, Antioquia, Belmira, Páramo Santa Inés, Cabaña Cabildo Verde, El Morro, Alto de La Gallina, Páramo ” / “Malaise Canopy #2, 6,632 639, -75,645267, 3170–3200m ” / “ 4-14.ii.2017, A. L. Montoya Leg ”. “ HOLOTYPE / Argentinomyia ivani Montoya 2023 ”. Identified as Argentinomyia sp. 21 by Montoya 2019 ( CEUA 95457 , dissected).

Length (n= 1): Body, 8.4–8.9 mm; Wings, 7.2–7.3 mm.

Diagnosis. Face blue metallic; wing slightly brownish on anterior margin, cell r covered by a brownish translucent macula; 3 rd and 4 th terga with a pair of rectangular yellow maculae extending from the base to the apical 2/3 of the segment length, apically rounded and reaching the lateral margin; surstylus with dorsal margin slightly concave and ventral margin slightly convex, shorter than broad; hypandrium laterally expanded towards the apex; aedeagal lobe circular, apex rounded to oval.

Description. MALE. Head ( Fig. 35A ): Face blue metallic, whitish-grey pollinose and pilose. Facial tubercle at least with two slightly pronounced transversal grooves. Gena black, whitish pollinose and pilose. Frontal triangle black pollinose and pilose. Ocellar triangle black with black pile. Occiput white pollinose, black pilose on dorsal 2/3 and white pilose on ventral 1/3. Antenna dark reddish-brown, short, ratio 1.0:1.3:2.5, basoflagellomere as long as the pedicel and scape combined; basoflagellomere blackish dorsal and reddish-orange ventral; arista brown. Thorax ( Figs 35B–C ): Mesonotum, scutellum and pleura black-blue semiopaque, golden yellow pilose. Scutum with two whitish vittae on anterior half, reaching beyond the notopleural suture, golden pilose, except black pile in the postpronotum, notopleuron and postalar callus. Pleura bluish pollinose, yellowish pilose, except anterior anepisternum and katerpimeron with black pile. Scutellum shining, slightly rugose on apical half, pile golden in addition to long marginal black pile. Wing ( Fig. 35C ): Slightly brownish on anterior margin, stigma brownish, microtrichose, except cell bm bare on basal 1/2, r bare on basal 1/4 and covered by a brownish translucent macula, cell cua bare on anterior 1/3; calypter wholly brown; plumula yellowing; halter orange-brown, capitulum white. Legs ( Fig. 35C ): Brown to black, black pilose, 1 st and 2 nd metatarsi orange-yellow, others black. Abdomen ( Fig. 35B ): Black, 1 st- 2 nd terga black shining, with long lateral yellowish pile; 3 rd and 4 th terga with a pair of rectangular yellow maculae extending from the base to the apical 2/3 of the segment length, apically rounded and reaching the lateral margin; male genitalia: surstylus in lateral view ( Fig. 36A ) with dorsal margin slightly concave and ventral margin slightly convex, shorter than broad; hypandrium in ventral view ( Fig. 36C ) laterally expanded towards the apex; aedeagal lobe in ventral view ( Fig. 36C ) circular, apex rounded to oval.

FEMALE. Unknown.

Taxonomic notes. Argentinomyia ivani sp. nov. is morphologically most similar to A. belmira sp. nov., both having the 1 st and 2 nd metatarsi orange-yellow, strongly contrasting with the dark color of other segments. Argentinomyia ivani sp. nov. differs by the following combination of characters: Face blue metallic ( Figs 36A, C , D-F); wing slightly brownish on anterior margin, cell r covered by a brownish translucent macula ( Figs 36 B-C, E-F); 3 rd and 4 th terga with a pair of rectangular yellow maculae extending from the base to the apical 2/3 of the segment length, apically rounded and reaching the lateral margin ( Figs 36B, E ). In Argentinomyia belmira sp. nov. the face black and somewhat brassy ( Figs 16A, C , D-F); wing slightly brownish ( Figs 16 B-C, E-F); 3 rd and 4 th terga almost entirely yellow, with a pair of wider yellow maculae from the base to the apical margin of the segment, rounded on lateral edge and with a thin median black stripe and narrow posterior black margin; the 5 th tergum almost entirely yellow with only a small posteromedian black triangle, black pilose in the black areas and on medio-apical region of the 3 rd to the 5 th terga ( Figs 16B, E ). Based on males, A. ivani sp. nov. differs from A. belmira sp. nov. in having the hypandrium in ventral view ( Fig. 36C ) laterally expanded towards the apex [versus hypandrium narrowed laterally towards the apex in A. belmira sp. nov. ( Fig. 17C )] (see “differential diagnosis” under each species or key).

Etymology. The name Argentinomyia ivani sp. nov. is a patronym given in memory of the uncle of the first author, Iván Montoya (Pharmacist for more than 40 years), who after my beloved father Augusto Montoya passed away, provided me support, guidance and fruitful teachings that will remain forever in my mind and heart. For him, this beautiful species that flies high as his unforgettable smile and admirable way of being, with open hands to serve those who need it.

Geographical range. Argentinomyia ivani sp. nov. (n= 1) is distributed in the Central Cordilleras in Colombia ( Fig. 91A ). The species is endemic to the Tropical Andes, distributed at the middle and high altitudes (3170–3200 m) in the Northern Andes domain and Magdalena province .

Figures

FIGURE 16. Argentinomyia belmira sp. nov., male Holotype (CEUA 95284): A. Head, frontal view; B. Dorsal view; C. Lateral view. Female (CEUA 95481): D. Head, frontal view; E. Dorsal view; F. Lateral view. Scale bars: 5 mm.

FIGURE 17. Argentinomyia belmira sp. nov., male Holotype, genitalia A. Whole genitalia, lateral view; B. Epandrium, dorsal view; C. Hypandrium, ventral view. Scale bars: 1 mm. D. Type locality in a pristine Andean forest at the Páramo of Santa Inés Belmira in Antioquia, Colombia. The specimens were collected flying in leks over the Native Bromeliad species, Guzmania coriostachya (Bromeliaceae).

FIGURE 35. Argentinomyia ivani sp. nov., male Holotype (CEUA 95457): A. Head, frontal view; B. Dorsal view; C. Lateral view; D. Posterior view, detail of maculae on 3rd and 4th terga. Scale bars: 5 mm.

FIGURE 36. Argentinomyia ivani sp. nov., male genitalia. A. Whole genitalia, lateral view; B. Epandrium, dorsal view; C. Hypandrium, ventral view. Scale bars: 1 mm.

FIGURE 91. Geographical distribution of Argentinomyia species in Central and South America.