Simosyrphus grandicornis ( Macquart, 1842 )

Ramage, Thibault, Charlat, Sylvain & Mengual, Ximo, 2018, Flower flies (Diptera, Syrphidae) of French Polynesia, with the description of two new species, European Journal of Taxonomy 448, pp. 1-37: 22-24

publication ID

https://doi.org/10.5852/ejt.2018.448

publication LSID

lsid:zoobank.org:pub:413AE92E-862A-4879-B72F-1C0DCF1F7240

DOI

http://doi.org/10.5281/zenodo.3815673

persistent identifier

http://treatment.plazi.org/id/FA02BC3C-C970-FFAF-955A-FB474B250492

treatment provided by

Valdenar

scientific name

Simosyrphus grandicornis ( Macquart, 1842 )
status

 

Simosyrphus grandicornis ( Macquart, 1842) 

Figs 5F, IView Fig, 6BView Fig

Syrphus grandicornis Macquart, 1842: 96  (holotype: ♂, MNHN; type locality: Australia, Sydney, Port Jackson).

Syrphus sydneyensis Macquart, 1846: 263  .

Syrphus pusilla Macquart, 1847: 77  .

Syrphus melanurus Bigot, 1884: 97  .

Syrphus obesus Hutton, 1901: 41  .

Syrphus vitiensis Bezzi, 1928: 71  .

Ischiodon scutellaris Bryan, 1934: 412  .

Metasyrphus fasciatus Shiraki, 1963: 186  .

Syrphus australiensis Van der Goot, 1964: 220  .

Syrphus huttoni Van der Goot, 1964: 220  .

Differential diagnosis

Simosyrphus grandicornis  has often been confused with species of Ischiodon  , especially I. scutellaris  , as they are sympatric and the males of both species have large genitalia. The morphological characteristics to distinguish S. grandicornis  are the broadly rounded basoflagellomere (subacute apically in I. scutellaris  ), black katepisternum ( Fig. 5FView Fig) (with a dorsal yellow marking in I. scutellaris  ; Fig. 3GView Fig), simple male metatrochanter ( Fig. 6BView Fig) (with a spine-like process in I. scutellaris  , Fig. 6AView Fig) and black metafemur, yellow on the apical fourth (mostly yellow, black only subapically in I. scutellaris  ).

Material examined

Not collected or studied from French Polynesia, but Nishida (2008) reported it from the Society Islands. We believe that Nishida’s records might be a misidentification of I. scutellaris  .

Geographical distribution

Very common Australasian species, found throughout Oceania (from New Caledonia and Fiji to Hawaii), New Zealand and Australia (all states). Simosyrphus grandicornis  is absent from the island of New Guinea.

Status in French Polynesia

Unknown.

Flowers visited

No records.

References

Nishida 2008 (list).

Remarks

Among the material examined there were no individuals of this species from French Polynesia; thus, we believe that S. grandicornis  is not present in the archipelago. Mengual (2015) stated that the dispersal of this species into many of the occupied Oceanic islands in its range was due to human activities, probably introduced by the early Polynesians who might have brought them in as larvae on fruits and plants they were transporting. Because it is plausible that S. grandicornis  will reach the islands of French Polynesia in the near future, we have included this species in the identification key (indicated with an asterisk *).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Simosyrphus

Loc

Simosyrphus grandicornis ( Macquart, 1842 )

Ramage, Thibault, Charlat, Sylvain & Mengual, Ximo 2018
2018
Loc

Syrphus grandicornis

Macquart P. J. M. 1842: 96
Loc

Syrphus sydneyensis

Macquart P. J. M. 1846: 263
Loc

Syrphus pusilla

Macquart P. J. M. 1847: 77
Loc

Syrphus melanurus

Bigot J. M. F. 1884: 97
Loc

Syrphus obesus

Hutton F. W. 1901: 41
Loc

Syrphus vitiensis

Bezzi M. 1928: 71
Loc

Ischiodon scutellaris

Bryan Jr. E. H. 1934: 412
Loc

Metasyrphus fasciatus

Shiraki T. 1963: 186
Loc

Syrphus australiensis

Van der Goot V. S. 1964: 220
Loc

Syrphus huttoni

Van der Goot V. S. 1964: 220