Victoriana attenuata (Williston, 1891) Miranda & Skevington & Marshall, 2020

Miranda, Gil Felipe Gonçalves, Skevington, Jeffrey H. & Marshall, Stephen A., 2020, New generic concepts for orphaned lineages formerly treated as part of the genus Ocyptamus Macquart, 1834 (Diptera, Syrphidae), Zootaxa 4822 (2), pp. 151-174 : 162

Victoriana attenuata species group

Description. Body brown ( Fig. 50 ). Head. Face narrow (between 1/4 to ~1/3 of head width), entirely pale; tubercle dorsally positioned. Antennal insertions confluent. Dorsal occiput with 1 row of pile. Thorax. Scutum pale laterally, and without distinct anterior row of pile. Scutellum pale. Anterior anepisternum pilose. Katatergite with short microtrichia that gives the sclerite a ‘velvet’ appearance. Metaepisternum pilose. Metasternum bare. Upper calypter margin with pile much shorter than pile on the ventral calypter margin. Wing. Alula absent. Wing hyaline ( Fig. 50 ).

Abdomen. Abdomen slightly petiolate, narrow and elongated, sometimes petiolate; terga 3 and 4 with medial, pale, triangular maculae that might be incised posteriorly or fully divided medially into two short stripes ( Fig. 50 ). Terminalia. Male postgonite apical margin straight and with dorsal and ventral apical acute extremities ( Fig. 56 ); surstylus with homogenously distributed setulae ventrally; hypandrium with pile sub-apically on ventro-lateral surface; basiphallus teardrop-shaped, distiphallus membranous with dorsal sclerotized triangular region (similar to Fig. 97 ).

Included species (8). V. attenuata ( Williston, 1891) comb. nov. [1b], V. duida ( Hull, 1947a) comb. nov. [1b], V. mentor ( Curran, 1930a) comb. nov. [1b], V. oblonga ( Walker, 1852) comb. nov. [1b], V. sagittifera ( Austen, 1893) comb. nov. [1b], V. sativa ( Curran, 1941) comb. nov. [1b], V. selene ( Hull, 1949a) comb. nov. [1a], V. zilla ( Hull, 1943b) comb. nov. [1b].

Comments. The V. attenuata species group can be further distinguished from the V. melanorrhina species group by the frons with only sparse microtrichia [microtrichia concentrated laterally in the V. melanorrhina species group (similar as in Fig. 86 )], hypandrium oval in dorsal profile [trapezoidal in the V. melanorrhina species group ( Fig. 99 )] and postgonite with straight apical margin (convex (fig. 55) or extended ventro-apically ( Fig. 54 ) in the V. melanorrhina species group).

Victoriana oblonga ( Fig. 77 ) and V. zilla ( Fig. 50 ) were previously allocated to the O. lepidus group ( Mengual et al. 2018) but characters visible on the type specimen images, including shape of their abdominal segments, colour pattern, and lack of alula, indicate that it belongs in Victoriana . Furthermore, it is likely that V. sativa (described on the basis of a male specimen, Fig. 89 ) is a junior synonym of V. oblonga (described on the basis of a female specimen, Fig. 77 ), although the type of the latter is too damaged to fully compare to the former.

The V. attenuata species group ( Fig. 50 ) resembles some Nuntianus species ( Figs 34–36 ), in that the subepandrial sclerite has apical extensions ( Fig. 53 ) similar to those in Nuntianus , however the sub-epandrial sclerite overall is different, and this resemblance is probably superficial. The hypandrium of the V. attenuata species group also has ventral pile sub-apically ( Fig. 56 ) as in Nuntianus , but this feature also occurs with slight variations in some species of Fragosa , Hybobathus , Maiana , Mimocalla Hull, 1943a , Pelecinobaccha Shannon, 1927 [ P. alucard Miranda in Miranda et al., 2014 , P. dracula ( Hull, 1943f) ], Relictanum Miranda in Miranda et al., 2014 [ R. braziliensis ( Curran, 1939) , R. magisadspersum Miranda in Miranda et al., 2014 , R. nero ( Curran, 1939) , R. schwarzi ( Curran, 1939) ], Styxia , and the other groups of Victoriana (e.g. Fig. 99 ). This group differs most markedly from Nuntianus species in having a postgonite with straight apical margin and with apico-dorsal and apico-ventral extremities acute and strongly produced ( Fig. 56 ).

Figures

FIGURES 48–60. Victoriana Miranda gen. nov.. 48: Victoriana melanorrhina (Philippi), female, habitus, dorsal, by Steve Marshall, photo previously published in Mengual et al. (2018). 49: Victoriana parvicornis (Loew) (CNC_Diptera237923), male, habitus, dorsal, photo previously published in Mengual et al. (2018). 50: Victoriana zilla (Hull) (holotype Baccha zilla Hull, AMNH), female, habitus, dorsal, by AMNH. 51: Victoriana aff. melanorrhina (debu00279441), male, epandrium, lateral. 52: Victoriana aff. melanorrhina (debu00279441), male, epandrium, ventral. 53: Victoriana cf. attenuata (JSS22253), male, epandrium, ventral. 54: Victoriana aff. melanorrhina (debu00279441), male, hypandrium, lateral. 55: Victoriana melanorrhina (debu01088955), male, hypandrium, lateral. 56: Victoriana cf. attenuata (JSS22253), male, hypandrium, lateral. 57–60. Victoriana parvicornis (Loew) (CNC_Diptera237923), male. 57: abdomen apex, ventral. 58: epandrium, frontal. 59: hypandrium, ventral. 60: hypandrium, lateral. c: cercus; d: distiphallus; e: epandrium; ex: extensions of sternum 5; p: postgonite; pr: process of sternum 8; s: surstylus; se: subepandrial sclerite; s8: sternum 8.

FIGURES 89–102. 89: Victoriana sativa (Curran) (holotype Baccha sativa Curran, AMNH), habitus, dorsal, by AMNH. 90– 91: Victoriana laudabilis (Williston) (holotype Baccha laudabilis Williston, BMNH, NHMUK010369870), copyright of The Trustees of the Natural History Museum, London. 90: base of abdomen and metafemur, dorsal. 91: base of wing, dorsal (line drawing represents outline of the alula). 92–95: Fragosa sp. (species group tenuis, CNC_Diptera196012), male. 92: hypandrium, lateral. 93: surstylus, ventro-lateral. 94: epandrium, lateral. 95: epandrium, ventral (line drawing represents outline of the subepandrial sclerite). 96–97: Nuntianus abata (Curran) (CNC_Diptera209361), male, hypandrium. 96: lateral. 97: ventral. 98: Syrphus conjunctus Wiedemann (currently incertae sedis, CNC_Diptera209347), male, hypandrium, lateral. 99: Victoriana aff. melanorrhina (debu00279441), male, hypandrium, ventral. 100: Victoriana aff. melanorrhina (DEBU), female, terminalia, dorsal. 101: Victoriana parvicornis (Loew) (CNC_Diptera237922), terminalia, dorsal. 102: Maiana pumila (Austen) (debu00178088), female, terminalia, dorsal. a: alula; c: cercus; d: distiphallus; e: epiproct; l: lobe; p: baso-posterior pile; t7 and 8: tergum 7 and 8.

FIGURES 78–88. 78: Fragosa harlequina (Hull) (holotype Baccha harlequina Hull, AMNH), male, thorax, lateral, by AMNH (line drawing represents outline of the alula). 79: Fragosa argentina (Curran) (CNC_Diptera174232), thorax, postero-ventral (line drawing represents outline of the incomplete post-metacoxal bridge). 80–81: Fragosa virgilio (Hull) (holotype Baccha virgilio Hull, CNC, CNC_Diptera189124), male. 80: habitus, lateral, by CNC. 81: head, oblique frontal, by CNC. 82: Fragosa titania (Hull) (JSS25229), female, head, dorsal. 83: Fragosa stenogaster (Williston) (debu01088840), male, head, dorsal. 84–85: Hypocritanus fascipennis (Wiedemann), female, head. 84: frontal, by Ximo Mengual (http://syrphidae.myspecies.info/ taxonomy/term/879). 85: lateral (CNC_Diptera501). 86–87: Nuntianus cecrops (Hull) (INPA-DIP000246), female, head. 86: dorsal. 87: lateral. 88: Victoriana aff. melanorrhina (DEBU), female, head, lateral. a: alula; ai: antennal insertion; f: frons; ft: frontal triangle; lem: lateral eye margin; mt: metafemur; o: ocellar triangle; oc: occiput; pmt: post-metacoxal bridge; t: facial tubercle.

FIGURES 68–77. 68: Maiana callida (Hine) (CNC_Diptera105396), male, abdomen, ventral. 69: Maiana pumila (Austen) (JSS32861), male, terminalia, oblique fronto-ventral. 70–73: Hybobathus pola (Curran). 70: female terminalia (CNC_Diptera 161361), apex, dorsal. 71–72: male terminalia (CNC_Diptera 161366). 71: hypandrium, ventral. 72: terminalia, lateral. 73: holotype Baccha pola Curran (AMNH), male, habitus, dorsal, by AMNH. 74: Fragosa aurora (Hull) (holotype Baccha aurora Hull, AMNH), male, habitus, dorsal, by AMNH. 75: Nuntianus variegatus (Macquart) (holotype Baccha variegata Macquart, MNHNP, ED8265), female, habitus, dorsal, by MNHNP. 76: Fragosa virgilio (Hull) (holotype Baccha virgilio Hull, CNC, CNC_Diptera189124), male, habitus, dorsal, by CNC. 77: Victoriana oblonga (Walker) (holotype Baccha oblonga Walker, BMNH, NHMUK 010369937), female, habitus, dorsal, copyright of The Trustees of the Natural History Museum, London. c: cercus; e: epiproct; h: hypandrium; l: lobe; n: lateral notch; p: postgonite; ph: phallus; s: surstylus; s4 and 5: sternum 4 and 5; t7: tergum 7.

FIGURES 23–37. Nuntianus Miranda gen. nov., habitus, dorsal. 23: Nuntianus cultratus (Austen) (holotype Baccha satyra Hull, AMNH), male, by AMNH. 24: Nuntianus neptunus (Hull) (holotype Baccha neptuna Hull, AMNH), male, by AMNH. 25: Nuntianus luctuosus (Bigot) (holotype Baccha vespuccia Hull, AMNH), male, by AMNH. 26: Nuntianus peri (Hull) (holotype Baccha peri Hull, AMNH), female, by AMNH. 27: Nuntianus pullus (Sack) (holotype Baccha danaida Hull, AMNH), male, by AMNH. 28: Nuntianus cecrops (Hull) (INPA-DIP000246), female. 29: Nuntianus niobe (Hull) (holotype Baccha niobe Hull, AMNH), female, by AMNH. 30: Nuntianus verona (Curran) (holotype Baccha verona Curran, AMNH), female, by AMNH. 31: Nuntianus anona (Hull) (holotype Baccha anona Hull, AMNH), female, by AMNH. 32: Nuntianus debasa (Curran) (holotype Baccha debasa Curran, AMNH), female, by AMNH. 33: Nuntianus aeolus (Hull) (holotype Baccha aeolus Hull, AMNH), female, by AMNH. 34: Nuntianus zobeide (Hull) (holotype Baccha zobeide Hull, AMNH), male, by AMNH. 35: Nuntianus chapadensis (Curran) (holotype Baccha chapadensis Curran, AMNH), female, by AMNH. 36: Nuntianus zenillia (Curran) (holotype Baccha zenillia Curran, AMNH), female, by AMNH. 37: Nuntianus nora (Curran) (holotype Baccha nora Curran, AMNH), male, by AMNH.