Paramyia rectiloba, Levesque-Beaudin & Mlynarek, 2020

Levesque-Beaudin, Valerie & Mlynarek, Julia J., 2020, Revision of Nearctic Paramyia Williston (Diptera: Milichiidae), Zootaxa 4732 (1), pp. 1-56 : 40-43

Paramyia rectiloba , new species

( Fig. 23–24 ; 30 )

Description. ( Fig. 23 ) Total length ♂ 1.4–1.5 mm, ♀ 1.7–1.8 mm. Overall colour brown to dark brown, frontal tri- angle dark brown to black, shiny, reaching lunule; frons 1.1–1.33 times longer than wide and 1.75–1.8 times wider than flagellum; width at widest point 2.13–2.33 times the bottom eye width; gena brown to dark brown with prunescence, 0.14–0.19 times eye height; postgena dark brown, with light prunescence and 0.23–0.30 width of head; scape and pedicel dark brown, first flagellomere subquadrate to slightly trapezoidal, same length than width, dark brown with pale pubescence, arista dark brown and 1.64–1.82 times width of first flagellomere; moderate facial carina, easily visible laterally; palpus brown to dark brown with 5 enlarge setae apically and 1 ventral seta pre-apical, labium dark brown 0.37–0.43 mm and labella brown and apically paler 0.46–0.48 mm long.

Scutum shiny dark brown; scutellum dark brown, microsetose; fore femur brown with apical antero-dorsal part with a slightly paler circle shape, mid and hind femur brown and all tibia brown; all tarsi light brow to yellowish; hind basitarsus shorter than length of tarsi 2–4 combined; haltere brown and slightly darker apically; wing 1.21–1.33 mm long; abdomen shiny dark brown.

Male postabdomen ( Fig. 24 ). Epandrium in lateral view 1.0 times wider than high, in posterior view 2.4 times wider than high (before cerci), small setae densely covering posterior portion of epandrium mixed with a low density of large setae; surstylus 1.3 times as high as epandrium, rounded rectangular shape with a large circular structure, thicker on the posterior side, situated basally with just a few short markings in the middle, setae medium length, covering anterior side and distal half of surstylus; cerci large and pointed apically, 0.89 times length of surstylus in posterior view, with a pair of very long preapical setae and other shorter setae, less than 1/3 its length, apically swollen in lateral view.

Molecular barcode sequence can be accessed through GenBank Accession: HQ981642 and BOLD BIN: BOLD: AAG0170 (average p-distance within BIN: 0.36%).

Distribution ( Fig. 30 ). East Coast: Canada: Nova Scotia, Quebec, Ontario; United States: Vermont, New Hampshire, Michigan, Florida / West Coast: Canada: British Columbia; United States: New Mexico

Type material. Holotype ♂. CANADA: British Columbia: 10 mi. E. Creston, 31.vii.1980, G. Gibson, sweeping, (DEBU).

Paratypes. CANADA: British Columbia: 10 km W Kamloops, New Afton Mine, 50.6719°N, 120.533°W, 1♂, 24.vii–1.viii.2013, C. Simon, Malaise trap (BIOUG), 10 mi. E. Creston, 49.1°N, 116.51°W, 4♂, 31.vii.1980, G. Gibson, sweeping (DEBU), 10 mi. E. Osoyoos, 49.03°N, 119.44°W, 1♂, 30.vii.1980, G. Gibson, sweeping (DEBU); Nova Scotia: Halifax, Point Pleasant Park, 44.623°N, 63.5686°W, 30m, 1♀, 14–22.vi.2006, T. Zemlak, Malaise trap (BIOUG), 1♂, 20–27.vii.2013, T. Zemlak, Malaise trap (BIOUG), 1♀, 22–26.vii.2005, T. Zemlak, Malaise trap (BIOUG), 1♂, 20–30.xi.1986, T. Zemlak, Malaise trap (BIOUG), 1♂, 14–19.vii.1987, T. Zemlak, Malaise trap (BIOUG), 1♀, 20.viii–3.ix.2014, T. Zemlak, Malaise trap (BIOUG); Ontario: Frontenac Co., Skycroft Campground, 5km W Chaffeys Locks, 44.55°N, 76.3667°W, 1♂, 14–19.vii.1987, B. Hubley, Malaise trap (ROM), 1♂, 14.viii–7.ix.2003, B. Hubley, Malaise trap (ROM), 1♂, 14–19.vii.2013, B. Hubley, Malaise trap (ROM), Killar- ney Provincial Park, nr hwy 637, 46.01°N, 81.1°W, 1♂, 11.vii.2004, J. Forrest, sweep (LEMQ), Lambton Co., Pinery Provincial Park, Sand dunes, 44.55°N, 76.3667°W, 1♂, 19–26.vii.2006, L. Packer, Malaise trap (ROM), Thousand Islands National Park, 44.4534°N, 75.865°W, 3♂, 1♀, 16–23.vii.2014, M. Brown, Malaise trap (BI- OUG), 3♂, 30.vii–8.viii.2014, M. Brown, Malaise trap (BIOUG), 2♂, 2–9.vii.2014, M. Brown, Malaise trap (BI- OUG), 1♂, 17.vi–3.vii.2003, M. Brown, Malaise trap (BIOUG), 1♂, 31.vii–18.viii.2014, M. Brown, Malaise trap (BIOUG); Quebec: Gatineau Co., Masham Township, 45.64°N, 76.01°W, 1♂, 27.vii.1995, E. Ikeda (LEMQ), Mont St. Bruno, 45.5524°N, 73.3339°W, 1♀, 24.vii–1.viii.2013, V. Levesque, flight interception trap (LEMQ), Ogden, Marlington Bog, 45.04°N, 72.1733°W, 1♀, 4–5.vii.2010, A. Moores, Malaise trap (LEMQ), Old Chelsea, King Mt., 45.49°N, 75.86°W, 1♂, 13.viii.1969, B.V. Peterson (CNC), St-Daniel, Parc National de Frontenac, 45.9683°N, 71.1517°W, 1♂, 12–19.viii.2013, A. Moores, pan trap (LEMQ). UNITED STATES: Florida: Miami, 25.76°N, 80.19°W, 1♂, 20.ii.1912, F. Knal (USNM); Michigan: Hunt Cr. Exp. Sta. nr. Lewiston, 44.88°N, 84.31°W, 1♂, 20.vii.1942, C.W. Sabrosky (USNM); New Mexico: Catron Co., 8 mi. SE. Luna, 33.82°N, 108.95°W, 2286m, 4♂, 9–14.vii.1987, S. Peck, J. Peck (DEBU); Vermont: East Franklin, Lake Carmi State Park, 44.9533°N, 72.8817°W, 1♂, 11–18.vii.2006, A. Moores, pan trap (LEMQ), 1♂, 11–17.vii.2013, A. Moores, Malaise trap (LEMQ).

Other material examined. CANADA: British Columbia: 10 km W Kamloops, New Afton Mine, 50.6719°N, 120.533°W, 1♂, 24–30.vii.2013, C. Simon, Malaise trap (BIOUG), 1♂, 24–28.viii.1987, C. Simon, Malaise trap (BIOUG), Mount Revelstoke National Park, Off trail behind old staff housing, 51.0181°N, 118.205°W, 608m, 1♂, 4–11.vii.2006, S. Devita, Malaise trap (BIOUG); Nova Scotia: Halifax, Point Pleasant Park, 44.623°N, 63.5686°W, 30m, 3♂, 1♀, 6–13.vii.2013, T. Zemlak, Malaise trap (BIOUG), 1♀, 3–10.viii.2013, T. Zemlak, Malaise trap (BIOUG), 1♀, 28.vi–12.vii.1986, T. Zemlak, Malaise trap (BIOUG), Kejimkujik, Hemocks and Hardwoods, 44.4425°N, 65.2535°W, 97m, 1♂, 31.vii.2009, BIObus 2009 (BIOUG); Ontario: 4452 Rowsome Rd., Elizabethtown, 44.6213°N, 76.273°W, 120m, 1♀, 19.vi.2010, J. Sones (BIOUG), Bruce Co., Bruce Peninsula National Park, Lake Scugog, 45.1167°N, 81.5333°W, 1♂, 1–17.viii.2002, S.A. Marshall, Malaise trap (DEBU), Puslinch, Property of Bob Hanner, 43.4464°N, 80.2512°W, 335m, 2♀, 03.viii.2008, T. Terzin (BIOUG), 1♂, 21.viii.2008, T. Terzin (BIOUG), Thousand Islands National Park, 44.4534°N, 75.865°W, 6♂, 5♀, 16–23.vii.2014, M. Brown, Malaise trap (BIOUG), 1♂, 2♀, 30.vii–8.viii.2014, M. Brown, Malaise trap (BIOUG), 1♂, 1♀, 2–9.vii.2014, M. Brown, Malaise trap (BIOUG), 1♂, 17–24.vii.2006, M. Brown, Malaise trap (BIOUG), 1♂, 4–11.vii.2006, M. Brown, Mal- aise trap (BIOUG); Quebec: Johnville Bog and Forest Park, 45.345°N, 71.7417°W, 1♂, 12–19.vii.2006, J. Savage, J. Kuchta, Malaise trap (LEMQ). UNITED STATES: New Hampshire: Coos Co., 1 km E Stark, 44.6°N, 71.4°W, 1♂, 8.viii.2000, J. Savage, sweep (LEMQ).

Etymology. The species name come from the Latin rectus, meaning straight and lobos (from Greek) meaning lobe, which refers to the fairly straight/parallel side of the surstylus.

Remarks. Females of P. anguliloba , P.lustrum , P. nitens , P. rectiloba , P. silvestris , P. wheeleri can only be reliably identified through sequencing.

Figures

FIGURE 23. Paramyia rectiloba male (A) habitus, (B) head frontal, (C) head lateral; female (D) habitus, (E) head frontal, (F) head lateral. Scale bar: habitus = 1 mm, others = 0.2 mm.

FIGURE 24. Paramyia rectiloba male genitalia (A) lateral, (B) posterior, (C) surstylus, (D) basal surstylus structure. Scale bar = 0.1 mm.

FIGURE 30. Distribution map of Paramyia anguliloba and Paramyia rectiloba. (created by Simplemappr)