Aphanotrigonum

Amended key to the Fennoscandian Aphanotrigonum View in CoL species

1’ Wings shorter than abdomen ...................................................................................................... A. brachypterum ( Zetterstedt, 1848)

- Wings longer than abdomen ...............................................................................................................................................................2

2’ Scutellum with many marginal setae, apical setae short and not much wider apart than postocellar setae distance.........................3

- Scutellum with no more than two pairs of marginal setae, apical setae long and wider apart than postocellar setae distance .........5

3’ Three or five longitudinal brownish stripes on scutum .......................................... A. trilineatum ( Meigen, 1830) [species complex]

- Scutum evenly grey without brown stripes ........................................................................................................................................4

4’ Male genitalia: epandrium large; cerci not tapering, with several longish setae; surstylus broad ....................................................... ................................................................................................................................................ A. hungaricum Dely-Draskovits, 1981

- Male genitalia: epandrium small; cerci slightly tapering, with one long seta; surstylus narrow ........ A. nigripes ( Zetterstedt, 1848)

5’ Legs dark; 1+2 notopleurals; scutellum rounded apically..................................................................................................................8

- Head and legs partly yellow; scutellum trapezoid with apical setae wider apart; 1+1 notopleurals; pleuron mainly dusted; male genitalia with surstylus directed mesad..............................................................................................................................................6

6’ Hind tibia with a small but distinct black spur; prothoracic episternum shiny ..................................................................................7

- Hind tibiae without a spur; prothoracic episternum dull ................................................................................. A. inerme Collin, 1946

7’ All coxae and femora dark ....................................................................................................................... A. femorellum Collin, 1946

- At least anterior and mid femora partly yellow................................................................................ A. cinctellum ( Zetterstedt, 1848)

8’ Anepisternum shiny; apical scutellars approximated; surstylus strongly tapering and straight; male cerci with a rounded apex............................................................................................................................. A. norrbotticum Nartshuk & Andersson, 2013

- Anepisternum pruinose; apical scutellars wide apart (as in A. femorellum ); surstylus U-shaped; male cerci with angulated apex .... ............................................................................................................................................................................... A. palpalis sp. nov.