Argentinomyia lanei ( Fluke, 1936 )

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 : 70-72

Argentinomyia lanei ( Fluke, 1936)

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

( Figs 40 , 41 and 94C )

Melanostoma lanei Fluke, 1936: 61 . Type locality: Brazil. S„o Paulo, S„o Paulo. HOLOTYPE Male AMNH (Examined). Refs.: Fluke, 1936: 61 ( Fig. 4 , male abdomen, Fig. 5 , head, lateral view, male); 1945: 26 ( Fig. 14 , head, lateral view, female); 1957: 277 (Figs 103–104, male genitalia); Marinoni & Thompson, 2004: 567

Rhysops lanei . Curran, 1937: 2 (key)

Rhysops lanei . Fluke, 1957: 266

Rhysops lanei . Thompson et al. 1976: 43

Argentinomyia lanei . Marinoni & Thompson, 2004: 567

Argentinomyia lanei . Thompson & Skevington, 2014: 98

Rhysops lachrymellea Hull, 1942: 10 . Type locality: Brazil. S„o Paulo. HOLOTYPE Male CNC

Rhysops lachrymellea . Thompson et al. 1976: 43

Rhysops lachrymellea . Cooper & Cumming, 1993: 70

Type material. HOLOTYPE. Adult Male , BRAZIL. São Paulo, 800 m, 1.i.1930, J. Lane (1♁, AMNH) . ALLOTYPE, label with the same data as Holotype: (1♀, Hull’s collection) . PARATYPE. Same data as Holotype (1♁, Collection de Institute São Paulo, Brazil); Same data as Holotype: (2♀, AMNH). “ PARATYPE / Rhysops / lachrymellea ” .

Length (n= 4): Body, 6.3–7.4 mm; Wings, 5.9–6.7 mm.

Diagnosis. Female frontal triangle with two rounded maculae; face with low tubercle, one transversal groove; mesonotum shining bronze to aeneous, reticulated with brown vittae on anterior half; metafemur at least 1/4 yellow basally; abdomen narrowed toward the base, with a pair of oblique maculae on 3 rd to 4 th terga; surstylus with dorsal and ventral margins approximately of the same width in the whole length, shorter than broad; hypandrium narrowed laterally towards the apex; aedeagal lobe with apex acute.

Redescription. MALE. Head ( Fig. 40A ): Face black, covered with white pollen which is slightly brownish alongside; mid-vitta metallic black, bare, violet margined, reaches from oral edge to just dorsal the flat tubercle and then forks so that there is a median dash of pollen extending from antennae almost to the tubercle; a large shining spot dorsal the antennae, with a single transverse groove; pile of the head all pale except a few black hairs on vertical triangle. Gena black, covered with white pollen which is slightly brownish. Ocellar triangle black with thin yellowish pollen, pile yellow. Occiput with yellow hairs dorsal, pollen and pile paler ventral. Antennae yellow, short, ratio 1.5:1.0:1.8, basoflagellomere brown dorsal; pedicel and scape subequal, together with about the length of basoflagellomere, black pilose; arista yellow at base and dark on apical 1/3, pilose. Thorax ( Figs 40B–C ): Punctulate, dull grey except on sides which are more aeneous, yellow pilose; with three brownish vittae on anterior half, a median slender brown vitta extending along the thorax, on each side a wider brownish vitta. Pleura shining aeneous, posterior margin of anepisternum somewhat reddish, pollen whitish and sparse. Scutellum punctulate, shining greenish-brassy to aeneous. Wing ( Fig. 40C ): Hyaline, stigma slightly yellowish, microtrichose, except cell c bare basal 1/2, cells bm and r almost bare, cell cua bare on anterior 1/3; calypter wholly yellow-whitish; plumula white; halter yellow, capitulum orange to reddish. Legs ( Fig. 40C ): Pro- and mesolegs light orange-brown; metafemur brown except for yellow on basal 1/2 and the tip; metatibia black to brownish; tarsus infuscate; pile pale, no peculiar hairs present. Abdomen ( Fig. 40B ): Slender, narrowed toward the base, semi-shining black with three pairs of elongate, slightly oblique, yellow maculae, large lateral maculae on 2 nd tergum separated by a 1/3 of segment’s width and covering entire lateral margin but attenuated posteriorly; on 3 rd tergum larger, more narrowly separated, oblong and somewhat oblique; the pair that posteriorly diverge and turn out to the lateral margin in the middle of the segment, basal corners of this segment are dark; the 4 th tergum with quite similar maculae which, however, do not reach lateral margin; sterna yellowish-orange, sterna 4 th yellow basally and brown on apical 3/4; pile short and yellow; cercus and surstyle yellowish to reddish; male genitalia: surstylus in lateral view ( Fig. 41A ) with dorsal and ventral margins approximately of the same width in the whole length, shorter than broad; hypandrium in ventral view ( Fig. 41C ) narrowed laterally towards the apex; aedeagal lobe in ventral view ( Fig. 41C ) with apex acute.

FEMALE ( Figs 40D–F ). Similar to male except for usual sexual dimorphism and differing in frontal triangle more brownish pollinose and there is a definite dark brown transverse band just in front of median ocellus. There are indications of small yellow maculae on 5 th tergum. Scutellum apex with a pair of slender bristle yellow.

Taxonomic notes. Argentinomyia lanei is similar to A. festiva and A. fastigata , distinguished from its congeners by the combination of characters: Female frontal triangle with two rounded maculae; face with low tubercle, one transversal groove ( Figs 40 D-F); mesonotum shining bronze to aeneous, reticulated with brown vittae on anterior half ( Figs 40B, E ); metafemur at least 1/4 yellow basally ( Figs 40A, C , D-F); abdomen narrowed toward the base, with a pair of oblique maculae on 3 rd to 4 th terga ( Figs 40B, E ). Based on males, A. lanei differs from A. fastigata and A. festiva in having the surstylus in lateral view ( Fig. 41A ), with dorsal and ventral margins approximately of the same width in the whole length, shorter than broad [versus surstylus with dorsal and ventral margins approximately of the same width in the whole length, elongated, at least two times longer than broad in A. festiva ( Fig. 33A ); surstylus with dorsal margin slightly concave and ventral margin slightly convex, shorter than broad in A. fastigata ( Fig. 31A )]; hypandrium in ventral view, narrowed laterally towards the apex in A. lanei ( Fig. 41C ) and A. festiva ( Fig. 33C ) [versus hypandrium expanded laterally towards the apex in A. fastigata ( Fig. 31C )]; aedeagal lobe in ventral view, with acute apex in A. lanei ( Fig. 41C ) and A. festiva ( Fig. 33C ) [versus aedeagal lobe circular, apex rounded in A. fastigata ( Fig. 31C )] (see “differential diagnosis” under each species or key).

Comments. The Holotype specimen of R. lanei is currently in the AMNH. Photos are available on their website AMNH: https://sci-web-001.amnh.org/imulive/iz.html?#details=ecatalogue.10023898.

Geographical range. Argentinomyia lanei (n= 58) is distributed in Argentina * (Tucumán), Serra de Fartura in Brazil (Minas Gerais, Paraná, Santa Catarina, S„o Paulo) and the Eastern slope of Central cordillera in Ecuador * (Azuay) ( Fig. 94C ). The species is present at low and middle altitudes (400–2650 m) in the following biogeographical domains and provinces: Northern Andes: Cauca (2650 m) ; Paraná (400–1274 m): Araucaria Forest (934–1274 m) , Atlantic Forest (800 m) , Paraná Forest (400–857 m) ; Chacoan (745–1114 m): Cerrado (745 m), Chaco (1114 m).

Non-type material examined. ARGENTINA. Tucumán, Burruyacu, Villa Padre Monti, -26.482644, - 64.966915, 1114 m, i.17-ii.7-1948, R. Golbach, Det. C.L. Fluke, 1951 (1♁, 1♀, FSCA, C.L. Fluke, 1951). BRAZIL. Minas Gerais, Passos, -20,7189, -46,6097, 745 m, 11.i.1961, C. Elias (1♀, DZUP 45574 , Det. H. S. Telford); Paraná, Curitiba, -25,4278, -49,2731, 934 m, 1.4.1976, H. S. Telford (1♁, DZUP 45570 , Det. F.C. Thompson); Curitiba, -25,4278, -49,2731, 934 m, 24.02.1975, H. S. Telford (1♀, DZUP 45573 , Det. L. Marinoni); Guarapuava, Estância Santa Clara, -25,3833, -51,45, 1098 m, 8.11.1986, PROFAUPAR (1♀, DZUP 43072 , Det. F.C. Thompson); Refugio de vida silvestre dos campos de Palmas , -26,533807, -51,599362, 1200 m, A. Couto (4♁, DZUP) ; Santa Catarina, Nova Teutonia , -27,183334, -52,383334, 530 m, 1ix.1948, A. Maller (1♀, AMNH) ; 530, 1.ii.1952, F. Plaumann (1♁, CNC DIPTERA 112201 , Det. J.R. Vockeroth); 6.1.1969, F. Plaumann (1♁, CNC DIPTERA 112202– 03 , Det. J.R. Vockeroth); 857 m, 1.vii.1964, F. Plaumann (23♁, 7♀, USNM ENT 01384856 ; 01406258; 01462446; 01406287; 01406220; 01406269; 01384740; 01406373; 01384707; 01384635; 01406325; 01406369; 01406305; 01384874; 01384503; 01384319; 01406288; 01384776; 01406240; 01384697; 01406225; 01406268; 01406379; 01443846; 01406386; 01406340; 01406296; 01406207; 01406360; 01406291; 01406318); 400 m, 29.vii.1938, F. Plaumann (5♁, 6♀, BMNH) ; 857 m, 6.i.1973, F. Plaumann (1♁, Field Museum Natural History 1975; D. L. Pearson Colen Acc Z-15, 289). ECUADOR. Azuay, San José de Raranga , -3,221361, -78,957493, 2650m ( CNC) .

Figures

FIGURE 4. Differences in head morphology, colouration and pollinosity patterns, frontal view: A. Leucopodella sp. (♁); B. Argentinomyia longicornis (♀);C. Argentinomyia rugosonasa (♀);D. Argentinomyia jamaicensissp. nov. (♀);E. Argentinomyia testaceipes (♀); F. Argentinomyia tropica (♀); G. Argentinomyia nigrans (♀); H. Argentinomyia browni (♀); I. Argentinomyia crenulata (♀); J–K. Argentinomyia norrbomi sp. nov. (♁): J. lateral view, K. frontal view; L. Argentinomyia longicornis (♁), lateral view; M. Platycheirus (Carposcalis) (♁), frontal view; N. Platycheirus (Tuberculanostoma) (♁), lateral view. Scale bar: 5 mm.

FIGURE 5. Female postabdomen. A. Lateral view of Argentinomyia norrbomi sp. nov.; B. Posterior view of the abdominal apex of Argentinomyia occidentalis sp. nov.; C. Dorsal view of distended abdomen of Argentinomyia luculenta. Abbreviations: Ap: apodeme of epiproct; Cer = Cercus; Ep: Epiproct; Hp: Hypoproct; Scl: sclerotized area; Sper: Spermatheca; Tg: tergite. Scale bars: 0.05 mm.

FIGURE 14. Argentinomyia aurifacies sp. nov., male Holotype (USNM ENT 01443646): A. Head, frontal view; B. Dorsal view; C. Lateral view. Female (USNM ENT 00038431): D. Head, frontal view; E. Dorsal view; F. Lateral view. Scale bars: 5 mm.

FIGURE 31. Argentinomyia fastigata (Fluke, 1945), male genitalia. A. Whole genitalia, lateral view; B. Epandrium, dorsal view; C. Hypandrium, ventral view. Scale bars: 1 mm. Male (USNM ENT 01443847): D. Head, frontal view; E. Dorsal view; F. Lateral view. Scale bars: 5 mm.

FIGURE 33. Argentinomyia festiva (Fluke, 1945), male genitalia. A. Whole genitalia, lateral view; B. Epandrium, dorsal view; C. Hypandrium, ventral view. Scale bars: 1 mm.

FIGURE 40. Argentinomyia lanei (Fluke, 1936), male (USNM ENT 01364776): A. Head, frontal view; B. Dorsal view; C. Lateral view. Female (USNM ENT 0146360): D. Head, frontal view; E. Dorsal view; F. Lateral view. Scale bars: 5 mm.

FIGURE 41. Argentinomyia lanei (Fluke, 1936), male genitalia. A. Whole genitalia, lateral view; B. Epandrium, dorsal view; C. Hypandrium, ventral view. Scale bars: 1 mm.

FIGURE 94. Geographical distribution of Argentinomyia species in southeastern South America.