Drymeia hucketti, Savage & Sorokina, 2021

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 hucketti sp. nov. Figs 2I , 6K , 7B , 11E , 12A , 16 , 17 , 18

Type material.

Holotype male labelled "Wood Mountain/ Sask 17.6.1955 / A. R. Brooks"; " HOLOTYPE / Drymeia hucketti ♂ / Savage & Sorokina [red]" ( CNC). Paratypes: all with " PARATYPE / Drymeia hucketti / Savage & Sorokina [yellow]" ( CNC unless otherwise indicated): 1 male, same as holotype. 1 male, same as holotype except ( BUIC) 1 male and 1 female labelled " Scout Lake / Sask. 17. VI.1955 / 49°20', 106°0' / J. R. Vockeroth" . 1 male labelled " Val Marie , Sask. / 49°15', 107°44' / 12. VI.1955 . 1 female same as previous but 9. VI.1955 . 1 female labelled "Elkwater L.,/ Alta , 10.VI-1956 / E.E. Sterns " ( BUIC) . 1 female labelled " Elkwater Alta / 8. VI. 1952 / A. R. Brooks" . 1 male labelled " Elkwater park, Alta / 31. V. 1952 / L. A. Konotopetz " . 1 male same as previous but 29. V.1952 . 1 female labelled " Banff , Alta. / 4.VII.1924 / Eric Hearle" . 1 female labelled " 12 mi. N. of Banff / Banff-Jasper Hw./ 4500' 26-VII-55/ R. Coyles" . 1 female labelled " Manyberries , Alta / 4-VI-.1956/ E.E. Sterns " . 1 male " Manyberries / Alta. 6. VI 1955 / A. R. Brooks" . 1 female labelled " Highwood Summit / Kananasksis-Coleman / Hwy., Alta, 72-8000'/ 14-VIII-1955 / J. R. McGillis" . 1 male and 1 female labelled " Waterton , ALTA/ 11 June 1962 / K.C. Hermann " . 1 male labelled " BIOUG04930 -G08/ CAN: AB: Waterton Lakes NP; Red / Rock Parkway moraine/ grassland 49.0813°N - 113.8792°W / 1335 m as IBIOBus 2012 6/27/2012 " ( BIOUG) . 1 female same as previous except BUIOUG05064-E03. 1 female same as previous except BIOUG05064 -D12. 1 female same as previous except BIOUG05064 -D11. 1 female same as previous except BIOUG05064 -B07. 1 female same as previous except BIOUG05064 -D03 and ( BUIC). 1 male same as previous except BIOUG05213 -G11 and 6/24/2012. 1 male labelled " BIOUG08066 -D02/ CAN: BC, 10 km W Kamloops; New / Alton Mine Grassland Protected / Area (control side) - Site 4/ 50.655°N, 120.655°W Chrystal / Simon 6/13/2013 " ( BIOUG) . 1 female same as previous except BUIOUG07269-F05. 1 male same as previous except BIOUG08066 -F06 and ( BUIC). 1 male labelled " Mt. Lolo / Kamloops, B.C./ 2. VI.1938 / G.S. Walley " . 1 female labelled "Moosehorn L.,/ B.C. 28.VII 1960 / 58°10', 132°07' / W.W. Moss 4500'" . 1 male same as previous except 27.VII.1960, R . Pilfrey . 1 male labelled " Chilcothin / 5/27/29 BC" . 1 male and 1 female labelled "B.C. Anarchist / Mt. 21. VI.1982 / B. V. Peterson" . 1 female labelled " BIOUG03134 -E09/ CAN: SK; Grasslands National Park ;/ just past bridge over Frenchman / River 49.1494°N, 107.5302°W R./ Sissons 06/05/2012 to 06/12/2012 " ( BIOUG) . 1 female labelled " BIOUG51024 -D11/ USA: MT; Missoula County / Florence MPG Ranch - Site 3/ 46.6905°N, 114.0265°W 1136m 13-/ 16 May 2019 Mat Seidensticker" ( BIOUG) . 1 female, same as previous except BIOUG24024 -E02. 1 female, same as previous except BIOUG24024 -E07. 1 male, same as previous except BIOUG24024 -E03. 1 male, same as previous except BIOUG24024 -E10. 1 male, same as previous except BIOUG24024 -F01.

Other material examined.

2 males: Nearctic: Canada: Alberta: Banff National Park; Saskatchewan: Grasslands National Park .

Etymology.

The species name is a patronym in honour of Hugh C. Huckett, a major contributor to the study of Nearctic Muscidae .

Diagnosis.

Small glossy black species with a long, strong prealar, lower margin of face projecting slightly beyond lower level of frons (Fig. 16A , 18A ), and 2+3 dc. Male F2 with av row strong and regular, covering apical 2/3 to 3/4, and with pv row long and strong, at least 2 × as long as width of femur on apical 1/2, and T 3 with a short but distinct ventral apical process (Fig. 16D ). This species is similar to Drymeia minor (Malloch, 1918) but can be distinguished from it in the female by the presence of a large undusted glossy patch on the parafacial near the base of the antenna (Fig. 18B ) and, in both sexes, by the projecting face, broader ventral margin of parafacial, pubescence pattern of arista and mostly shiny abdomen. Females are also similar to those of D. amnicola (see couplet 14 of female identification key) but these taxa have very different distribution ranges.

Description.

Male. Body length: 4.6-6.6 mm; wing length 4.1-5.1 mm.

Head: Ground colour black; eye bare; fronto-orbital plate and parafacial silvery pruinose; face grey, gena and lower occiput grey pruinose; fronto-orbital plates touching in the middle; frons at narrowest point 2-3 × as wide as width of anterior ocellus; parafacial in lateral view with ventral margin broader than width of first flagellomere; lower margin of face projecting slightly beyond lower level of frons (Fig. 16A ); gena at narrowest point 1.3 × length of first flagellomere, densely setulose and with a group of upcurved setae on anterior part of genal dilation; 11-13 frontal setae (including interstitials) reaching to anterior ocellus; antenna black; first flagellomere 1.2 × as long as wide; arista with hair much denser on basal 1/2 (longest hair as long as basal diameter of arista) and usually with sparse and very dorsal short hair on apical 1/2; palpus black; proboscis elongate with prementum much longer than palpus, mostly undusted and shiny; labella moderately developed.

Thorax: Ground colour black; scutum, postpronotal lobe, notopleuron, postalar callus and pleuron subshiny and light grey dusted; anepimeron and katepimeron bare; notopleuron densely setulose; 2+3 dc; prealar long and strong.

Legs: Black; T 1 with 1-3 pv; F2 with av row strong and regular, slightly longer than width of femur, covering apical 2/3 to 3/4 and with bristles curved on basal 1/2 (Fig. 16C ), 2 or 3 preapical pd-p, with complete row of long strong pv, at least 2 × as long as width of femur on apical 1/2; T 2 usually without av (one paratype with 1 short av on one side), 3-6 pd, 2-4 pv (some specimens also with 2 or 3 p); F3 with av row stronger on apical 1/3, without pv except one hair near base; T 3 with 4 or 5 av, 6 or 7 ad, 4 or 5 pd, 4 or 5 short hair-like pv in middle part, ventral apical process short but distinct (Fig. 16D ), apical pv distinct but no longer than 1/2 the length of apical av.

Wing: Brown, darker near base; basicosta and tegula black; costal spinules weak and costal spine reduced; calypters with membrane and edges yellow.

Abdomen: Conical, ground colour black; lightly grey dusted and mostly shiny, tergites without distinct dark central vittae (Fig. 16B ); sternite I bare; sternite V as in Fig. 17C .

Terminalia: Fig. 17A, B .

Female. Body length: 5.7-6.5 mm; wing length: 4.6-5.0 mm (Fig. 18A ). Differs from the male as follows:

Head: Frontal triangle undefined; ocellar triangle mostly glossy; frontal vitta black, deep brownish dusted; parafacial with large undusted shiny patch near base of antenna reaching up to or almost up to eye (Fig. 18B ); frons at midpoint approximately 0.35 × as wide as head and approximately 1.2 × as long as wide; fronto-orbital plate narrow, approximately as wide as distance between inner margins of posterior ocelli; 3-6 medioclinate frontal setae and several weaker interstitials, two short reclinate and lateroclinate orbital setae followed by one (occasionally two) stronger proclinate orbital seta; arista as in male (Fig. 18C ).

Thorax: As in male.

Legs (chaetotaxy described in full): T 1 with 2 pv; F2 variable with 1-6 av (most specimens with 4 or 5), approximately as long as width of femur, and no pv; T 2 with 2 or 3 ad, 3 or 4 pd, 2 pv; T 3 with 3-5 av, 3-6 ad, 4 pd, and usually without pv (if present then very weak and short), apical pv distinct, at least 1/2 as long as apical av.

Wing: Veins yellow at least near base, membrane deep yellow near base, the remainder pale yellow to pale brown.

Abdomen: With little to no dusting, shiny.

Distribution.

Nearctic: Canada (Alberta, British Columbia, Saskatchewan), USA (Montana) .

DNA Barcode.

BOLDBIN: BOLD:ACA9214. See Suppl. material 1: Table S1 for GenBank accession numbers.

Remarks.

The discovery of this species resulted from an exploration of all public Drymeia COI sequences found in BOLD (> 2800) which brought our attention to BOLD:ACA9214, a BIN including several well-preserved undetermined specimens of both sexes which turned out to be morphologically distinctive from any other species previously known to us. DNA barcodes for material from Canada and the United States (Fig. 25 ) were available with intraspecific p-distances ranging from 0.0% of 0.35%.

Figures

Figure 2. Male hind tibia, dorsal view A D. ponti B D. aterrima C D. groenlandica D D. setibasis E D. similis F D. vockerothi G D. quadrisetosa H D. glacialis I D. hucketti J D. woodorum. Scale bars: 0.5 mm.

Figure 6. Male mid femur, anterior view (except G, H, L) A D. cantabrigensis B D. setibasis C D. vockerothi D D. profrontalis E D. glacialis F D. quadrisetosa G D. santamonicae, antero-dorsal view H D. amnicola, postero-dorsal view I D. similis J D. amnicola K D. hucketti L D. aldrichi, ventral view. Scale bars: 0.25 mm.

Figure 7. Male abdomen A D. firthiana B D. hucketti C D. minor. Scale bars: 1 mm.

Figure 11. Female frons A D. similis B D. latifrons C D. profrontalis D D. ponti E D. hucketti. Scale bars: 0.5 mm.

Figure 12. Female arista A D. hucketti B D. aterrima C D. minor. Scale bars: 0.25 mm.

Figure 16. Drymeia hucketti sp. nov. A holotype habitus B male abdomen, dorsal view C male mid femur, anterior view D male hind tibia. Scale bars: 1 mm (A, B); 0.5 mm (C, D).

Figure 17. Drymeia hucketti sp. nov., male terminalia A lateral view B posterior view C sternite V.

Figure 18. Drymeia hucketti sp. nov. A female habitus, paratype B female head, frontal view C female arista. Scale bars: 1 mm (A, B); 0.25 mm (C).

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).