Melanostoma

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: 27-29

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.3815659

persistent identifier

http://treatment.plazi.org/id/FA02BC3C-C97F-FFA4-97F7-FB4C4B22019B

treatment provided by

Valdenar

scientific name

Melanostoma
status

 

Key to Australasian and Oceanian species of Melanostoma 

1. Face with a distinct tubercle ( Fig. 7C, EView Fig); male genitalia small ( Fig. 7A, CView Fig)..........................4

– Face with only a trace of a tubercle, almost straight ( Figs 4DView Fig, 7DView Fig, 9AView Fig); male genitalia greatly enlarged, usually visible externally ( Figs 6GView Fig, 7B, DView Fig, 9BView Fig).............................................................2

2. Abdominal terga entirely black ( Figs 4AView Fig, 6View Fig F–G); legs partly black in both male and female ( Figs 4CView Fig, 6View Fig F–G). Male genitalia: surstylus curved towards dorsal part ( Fig. 9DView Fig) ( French Polynesia) ................................................................................................... M. polynesiotes  sp. nov.

– Abdominal terga with large orange or yellow abdominal markings; male abdomen almost entirely orange with apical margins narrowly black and genitalic segments black ( Figs 7B, DView Fig, 9BView Fig); female abdomen with pairs of large, narrowly separated pale maculae ( Figs 7FView Fig, 8AView Fig); legs all orange, rarely metatibia with an indistinct medial brown band ( Fig. 7B, EView Fig). Male genitalia: surstylus curved towards ventral part ( Fig. 9G, IView Fig).........................................................3

3. Male surstylus club-shaped apically ( Fig. 9IView Fig). Female: frons extensively pollinose, with two small shiny areas above lunule and ventrad to anterior ocellus; shiny areas do not reach eye margin ( Fig. 8BView Fig) ( India, Sri Lanka, Thailand, Taiwan, Philippines, Borneo, Java, Central Moluccas: Buru) .................................................. M. univittatum (Wiedemann, 1824) 

– Male surstylus tapers to slender acute apex ( Fig. 9GView Fig). Female: frons mainly shiny with two large lateral pollinose maculae; shiny areas reach eye margin ( Fig. 8CView Fig) (New Guinea, Australia, New Caledonia, Solomons, Fiji, Tonga, Samoa) ....................................... M. apicale Bigot, 1884 

4. Abdominal terga with yellow maculae on terga 2–4, sometimes very large, but always with a medial continuous black vitta ( Fig. 7AView Fig) ( New Zealand) .................... M. fasciatum (Macquart, 1850) 

– Abdominal terga entirely black, sometimes extensively dark pollinose (New Guinea) ................. ....................................................................................................... M. fumivenosum Doesburg, 1966 

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae