Syrphidae

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: 26-27

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.3815661

persistent identifier

http://treatment.plazi.org/id/FA02BC3C-C97C-FFA2-97F7-FB974B2304B4

treatment provided by

Valdenar

scientific name

Syrphidae
status

 

Key to the species of Syrphidae  in French Polynesia

1. Postpronotum bare, head posteriorly strongly concave and closely appressed to thorax so that postpronotum is partly or entirely hidden ( Fig. 2View Fig B–C); male abdomen with five unmodified pregenital segments; tergum 5 visible in dorsal view ( Fig. 2View Fig A–D).............................................5

– Postpronotum pilose, head posteriorly less strongly concave so that postpronotum is clearly exposed ( Fig. 5View Fig A–B); male abdomen with four unmodified pregenital segments; tergum 5 usually not visible in dorsal view ( Fig. 5View Fig D–E, G).......................................................................................2

2. Vein R4+5 strongly sinuate ( Fig. 5AView Fig); metafemur with basoventral patch of black setulae ........ ................................................................................................. Palpada vinetorum ( Fabricius, 1798) 

– Vein R4+5 straight or nearly so ( Fig. 5C, EView Fig); metafemur without basoventral patch of black setulae...............................................................................................................................................3

3. Arista plumose ( Fig. 4EView Fig); face with medial and two lateral tubercles ( Fig. 4EView Fig); metafemur not enlarged, without ctenidium; entire body metallic green or purple ( Fig. 4BView Fig) ................................... .......................................................................................................... Ornidia obesa ( Fabricius, 1775) 

– Arista bare ( Fig. 4FView Fig); face carinate ( Fig. 4FView Fig); metafemur greatly enlarged, with a ctenidium on posteroventral half ( Fig. 5View Fig B–E); body coloration mainly black with pale markings ( Fig. 5View Fig B–E, G–H)..................................................................................................................................................4

4. Spurious vein well sclerotized, as distinct as the neighboring R and  M veins ( Fig. 5C, GView Fig); ventral surface of metatibia modified, with anteroventral carina forming a prominent lamina in males, less evident in females. Male: terga 2 and 3 with a broad yellow fascia not divided medially ( Fig. 5GView Fig). Female: tergum 4 with a distinct yellow fascia on posterior margin ( Fig. 5DView Fig) .......... ............................................................................................... Syritta aenigmatopatria Hardy, 1964 

– Spurious vein not sclerotized, appears as a shadow formed by microtrichia ( Fig. 5B, EView Fig); metatibia without lamina; terga 2 and 3 with a medial black vitta forming two lateral yellow maculae ( Fig. 5EView Fig) ......................................................................... Syritta oceanica Macquart, 1855 

5. Face and scutellum entirely black in ground color ( Fig. 4A, DView Fig); metasternum greatly reduced, with deep anterior incision on each side (as in Fig. 9CView Fig) ......... Melanostoma polynesiotes  sp. nov.

– Face and/or scutellum partially pale in color, usually yellow in ground color ( Figs 3F, HView Fig, 6EView Fig); metasternum entire, not reduced.....................................................................................................6

6. Face partly black, usually yellow with a medial black vitta ( Fig. 3B, D, FView Fig); metasternum with at least some pile; abdomen without margin ( Figs 2View Fig A–B, 3A).......................................8

– Face entirely yellow ( Fig. 3HView Fig); metasternum bare; abdomen distinctly marginated on terga 2–5 ( Figs 2DView Fig, 3GView Fig, 5FView Fig)...............................................................................................................................7

7. Katepisternum without a dorsal yellow macula but densely pollinose ( Fig. 5FView Fig); scutellum usually with black and pale pile; male metatrochanter without any process or projection ( Fig. 6BView Fig) .......... ..................................................................................... Simosyrphus grandicornis Macquart, 1842  *

– Katepisternum with a dorsal yellow macula ( Fig. 3GView Fig); scutellum with pale pile only; male metatrochanter with a ventral spine-like process or calcar ( Fig. 6AView Fig) .............................................. ............................................................................................... Ischiodon scutellaris ( Fabricius, 1805) 

8. Scutum and scutellum entirely black ( Figs 2BView Fig, 6CView Fig); abdominal terga 3 and 4 black with two small yellow maculae each, close to the lateral margin ( Figs 2BView Fig, 6DView Fig) ..... Allograpta jacqi  sp. nov.

– Scutum black with lateral yellow vitta ( Figs 2AView Fig, 3AView Fig) and scutellum yellow with black medial macula ( Fig. 2A, CView Fig); abdominal terga 3 and 4 black with a yellow fascia each ( Figs 2A, CView Fig, 3AView Fig)...9

9. Wing entirely microtrichose except cell R bare anterior to spurious vein basally; costal cell bare basally, less than 1/5 .................................................... Allograpta amphotera ( Bezzi, 1928) 

– Wing partly bare basomedially, cell BM bare on basal ¼–½ or more, cell R bare anterior to bifurcation; costal cell bare on basal ¼ ..................... Allograpta nigripilosa ( Hull, 1944) 

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae