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

publication ID

https://doi.org/ 10.11646/zootaxa.4822.2.1

publication LSID

lsid:zoobank.org:pub:E3B5713F-ADE8-4075-9ABF-8F6DE9D3A88E

DOI

https://doi.org/10.5281/zenodo.4401363

persistent identifier

https://treatment.plazi.org/id/A51D5F67-FFE5-3A62-FF50-FC47FE319E8A

treatment provided by

Plazi

scientific name

Victoriana attenuata
status

 

Victoriana attenuata View in CoL species group

Description. Body brown ( Fig. 50 View FIGURES 48–60 ). 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 View FIGURES 48–60 ).

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 View FIGURES 48–60 ). Terminalia. Male postgonite apical margin straight and with dorsal and ventral apical acute extremities ( Fig. 56 View FIGURES 48–60 ); 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 View FIGURES 89–102. 89 ).

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 View FIGURES 78–88. 78 )], hypandrium oval in dorsal profile [trapezoidal in the V. melanorrhina species group ( Fig. 99 View FIGURES 89–102. 89 )] and postgonite with straight apical margin (convex (fig. 55) or extended ventro-apically ( Fig. 54 View FIGURES 48–60 ) in the V. melanorrhina species group).

Victoriana oblonga ( Fig. 77 View FIGURES 68–77. 68 ) and V. zilla ( Fig. 50 View FIGURES 48–60 ) 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 View FIGURES 89–102. 89 ) is a junior synonym of V. oblonga (described on the basis of a female specimen, Fig. 77 View FIGURES 68–77. 68 ), although the type of the latter is too damaged to fully compare to the former.

The V. attenuata species group ( Fig. 50 View FIGURES 48–60 ) resembles some Nuntianus species ( Figs 34–36 View FIGURES 23–37 ), in that the subepandrial sclerite has apical extensions ( Fig. 53 View FIGURES 48–60 ) 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 View FIGURES 48–60 ) 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 View FIGURES 89–102. 89 ). 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 View FIGURES 48–60 ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Victoriana

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