Argentinomyia plaumanni Thompson & 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 : 105-106

publication ID

https://doi.org/ 10.11646/zootaxa.5234.1.1

publication LSID

lsid:zoobank.org:pub:A540F250-BDE2-43F7-83A1-DA261F914B41

DOI

https://doi.org/10.5281/zenodo.7610031

persistent identifier

https://treatment.plazi.org/id/03C03256-AC2F-FF86-0FF9-FF2DF383F9DA

treatment provided by

Plazi

scientific name

Argentinomyia plaumanni Thompson & Montoya
status

sp. nov.

Argentinomyia plaumanni Thompson & Montoya View in CoL sp. nov.

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

Argentinomyia 74–06 Thompson, unpublished

( Figs 61 View FIGURE 61 , 62 View FIGURE 62 and 93D View FIGURE 93 )

Type material. HOLOTYPE. Adult male, pinned, deposited at National Museum of Natural History. Original label: “ BRASIL, Santa Catarina, Nova Teutonia” / “ -27,183334, -52,383334, 857m 10.i.1965, F. Plaumann ” “ HOLOTYPE / Argentinomyia plaumanni / Thompson & Montoya 2023” ( USNM ENT 00036936 ). Identified as Argentinomyia 74–06 by Thompson 1974 GoogleMaps . PARATYPES. BRAZIL. Labels : same data as Holotype (7♁, USNM ENT 00036934 About USNM ; 00036931; 00036932; 00036937; 00036933; 00036935; 0036938) GoogleMaps ; BRASIL. Curitiba , 3.i.1954, N.L.H. Krauss (1♁, USNM ENT 01443774 About USNM , dissected) .

Length (n= 5): Body, 8.6–9.1 mm; Wings, 7.2–7.4 mm.

Diagnosis. Legs black to brownish; except femur yellow on apical 1/4; pro-, meso- and metatibia yellow on basal 1/3, 1/4 and 1/2, respectively, tarsus black; black pilose; abdomen black, 2 nd tergum with a pair of basolateral elongate yellow maculae reaching the apical 3/4 of the segment length; 3 rd tergum with a pair of basal elongated maculae reaching apical 2/3, but not reaching lateral margin; 4 th and 5 th terga black; surstylus with dorsal margin slightly concave and ventral margin slightly convex.

Description. MALE. Head ( Fig. 61A View FIGURE 61 ): Face perpendicular with four faint transverse depressions, tubercle elongate, broad and low; mid-vitta shining black, sides white pollinose and pilose. Frontal triangle shiny, coppery pollinose, black pilose. Gena shining, white pollinose. Ocellar triangle black, black pilose; occipital pile fine, short and black, white pollinose. Antennae orange, short, ratio 1.2:1.0:2.0; scape darker, basoflagellomere darkened dorsally, scape only very little longer than pedicel which is wider than long, basoflagellomere short, little longer than the scape and pedicel together; arista yellow at base and dark on apical third. Thorax ( Figs 61B–C View FIGURE 61 ): Aeneous, scutum with two very faint pollinose white vittae on anterior half, yellow-golden pilose. Pleura lightly coated with brownish to rusty-colored pollen, yellow pilose. Scutellum black, with long golden pile, in addition to some brown pile in the margin. Wing ( Fig. 61C View FIGURE 61 ): Slightly yellowish, stigma yellow, microtrichose, except bare on basal 1/4 of cell bm, cell cua bare basally; calypter wholly whitish; plumula yellow; halter yellow, capitulum yellow. Legs ( Fig. 61C View FIGURE 61 ): Black to brownish; except femur yellow on apical 1/4; pro-, meso- and metatibia yellow on basal 1/3, 1/4 and 1/2, respectively, tarsus black., black pilose. Abdomen ( Fig. 61B View FIGURE 61 ): Narrow with nearly parallel sides, shining black, 2 nd tergum with a pair of basolateral elongate yellow maculae reaching the apical 3/4 of the segment length; 3 rd tergum with a pair of basal elongated maculae reaching apical 2/3, but not reaching lateral margin; 4 th and 5 th terga black, black pilose, sterna yellow pilose; male genitalia: surstylus in lateral view ( Fig. 62A View FIGURE 62 ) with dorsal margin slightly concave and ventral margin slightly convex, shorter than broad; hypandrium in ventral view ( Fig. 62C View FIGURE 62 ) narrowed laterally towards the apex; aedeagal lobe in ventral view ( Fig. 62C View FIGURE 62 ) circular, apex rounded.

FEMALE. Unknown.

Taxonomic notes. Argentinomyia plaumanni sp. nov. is similar to A. nigrans differing by the following combination characters: Legs black to brownish; except femur yellow on apical 1/4; pro-, meso- and metatibia yellow on basal 1/3, 1/4 and 1/2, respectively, tarsus black, black pilose ( Figs 61A, C, D, F View FIGURE 61 ); 2 nd tergum with a pair of basolateral elongate yellow maculae reaching the apical 3/4 of the segment length ( Figs 61B, E View FIGURE 61 ). In A. nigrans the femora and tarsi black ( Figs 53A, C, D, F View FIGURE 53 ); abdomen black with small yellow to red maculae on basal corners of the 2 nd tergum, reaching over the sides and 1/2 of segment length ( Figs 53B, E View FIGURE 53 ). Based on males, A. plaumanni sp. nov. differs from A nigrans in having the surstylus in lateral view ( Fig. 62A View FIGURE 62 ) with dorsal margin slightly concave and ventral margin slightly convex [versus surstylus with dorsal and ventral margins similar (square-like) in A nigrans ( Fig. 54A View FIGURE 54 )] (see “diagnosis” under each species or key).

Etymology. The specific epithet of this species is a Latinized noun in the genitive case of the last name ‘Plaumann’ in honor of Fritz Plaumann, who collected the type series in Nova Teutonia.

Geographical range. Argentinomyia plaumanni sp. nov. (n= 9) is exclusively known from southeastern Brazil (Santa Catarina and Paraná) ( Fig. 93D View FIGURE 93 ). The species is endemic to the Paraná domain at low altitudes (857 m) in the Paraná Forest province .

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Argentinomyia

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