Drymeia neoborealis (Snyder, 1949)

Savage, Jade & Sorokina, Vera S., 2021, Review of the North American fauna of Drymeia Meigen (Diptera, Muscidae) and evaluation of DNA barcodes for species-level identification in the genus, ZooKeys 1024, pp. 31-89 : 31

Drymeia neoborealis (Snyder, 1949) Fig. 1C

Aricia borealis Malloch, 1919: 64.

Helina neoborealis Snyder, 1949: 122 [replacement name for Aricia borealis Malloch, 1919].

Type material examined.

Aricia borealis - Holotype male labelled "Bernard/ Harbour/ N.W. T./ July"; Canadian/ Arctic/ Expedition/ F. d. 1916"; TYPE / H. Aricia borealis / Mall./ No. 1176 [red]"/ “374” ( CNC). Allotype [belongs to Spilogona tundrae Schnabl] female labelled " Helina / PARATYPE / Aricia borealis / Mall/ No 1176 [yellow]"/ Cape Bathurst/ N. W. T."; "Arctic/ Expedition/ July 26 191[no last digit]"; " F. Johansen / Coll."; “387”; " Spilogona / Spilogona tundrae Schn./ det. V / Sorokina, 2019" ( CNC) .

Other material examined.

More than 50 males and females: Nearctic: Canada: Northwest Territories: Banks Island, Masik River , Victoria Island ; Nunavut: Aulavik , Baker Lake , Cambridge bay , Char river nr Ranking Inlet , Chesterfield , Landing Lake (7.5 km NW of Rankin inlet). Palaearctic : Russia: Chukotka AO: Wrangel Island ( BUIC, CNC, SZMN) .

Distribution.

Nearctic: Canada (Northwest Territories, Nunavut); USA (Alaska, California, Colorado). Palaearctic: Russia (Wrangel Island).

DNA Barcode.

BOLDBIN: BOLD:ACA8935. See Suppl. material 1: Table S1 for GenBank accession numbers.

Remarks.

Huckett (1975: 103) mentions an undescribed Eupogonomyia species from California (female only) that would be distinguished from D. neoborealis based on the complete absence of a prealar bristle (the prealar is short but often visible in D. neoborealis ) as well as projecting oral margins. We have found these features to be variable in the material we have examined (including specimens with DNA barcodes) and conclude that the unnamed species mentioned by Huckett (1975) falls within the range of known variations for D. neoborealis . While the COI sequence from the only Russian specimen in our data set showed a minimum intraspecific p-distance of 1.37% with the Canadian specimens, all DNA barcodes for D. neoborealis clustered together in BINBOLD:ACA8935 (Fig. 25 ) with a maximum intraspecific p-distance of 1.52%.

Figures

Figure 1. Male frons, frontal view A D. ponti B D. aterrima C D. neoborealis D D. vockerothi. Scale bars: 0.5 mm.

Figure 25. Neighbour-joining tree based on p-distance of all COI sequences (> 550 bp) for which specimens were examined. Each terminal includes the species name, BOLD process ID number, country of collection, and Barcode Index Number. Red text indicates the presence of more than one named species grouped under a single BIN (BIN merge).