Paramyia brevikeraia, Levesque-Beaudin & Mlynarek, 2020

Levesque-Beaudin, Valerie & Mlynarek, Julia J., 2020, Revision of Nearctic Paramyia Williston (Diptera: Milichiidae), Zootaxa 4732 (1), pp. 1-56 : 28-29

Paramyia brevikeraia , new species

( Fig. 13–14 ; 29 )

Description. ( Fig. 13 ) Total length ♂ 1.8 mm, ♀ 2.0– 2.3 mm. Overall colour dark brown to black, frontal triangle dark brown to black, shiny, reaching lunule; frons 1.0–1.1 times longer than wide and 2.0–2.2 times wider than flagellum; width at widest point 2.3–2.5 times the bottom eye width; gena shiny brown, 0.21–0.22 times eye height; postgena shiny brown, with light prunescence and 0.28–0.32 width of head; scape and pedicel brown to dark brown, first flagellomere oblong, 1.2 times wider than long, dark brown with pale pubescence, arista dark brown and 1.7–2.1 times width of first flagellomere; moderate facial carina, visible laterally; palpus dark brown with 4 enlarge setae apically, 1 ventral seta pre-apical and a ventral row of slender setae, labium brown 0.43–0.45 mm and labella brown 0.45–0.49 0.48–0.53 mm long.

Scutum shiny dark brown to black; scutellum dark brown to black, microsetose; fore femur dark brown; fore tibia brown on dorsal and posterior side with apex lighter and anterior side light brown; femur and tibia on mid and hind leg dark brown; all tarsi light brown; hind basitarsus shorter than length of tarsi 2–4 combined; haltere uniformly dark brown; wing 1.6–1.7 mm long; abdomen shiny brown to dark brown.

Male postabdomen ( Fig. 14 ). Epandrium in lateral view 1.1 times longer than wide, in posterior view 2.3 times wider than high (before cerci), small setae densely covering posterior portion of epandrium mixed with a low density of large setae; surstylus 1.1 times as high as epandrium, paddle shape with anterior edge straight and posterior edge curved (opposite from the other species), and with a large egg shape structure situated basally and covering about half the surstylus length, short setae covering anterior side and distal half of surstylus and with 3 very long apical setae; cerci small, narrow and pointed apically, 0.53 times length of surstylus in posterior view, with short strong setae on bottom half, apically swollen in lateral view.

Molecular barcode sequence can be accessed through GenBank Accession: HQ981516 and BOLD BIN: BOLD: AAN8613 (average p-distance within BIN: 0.3%).

Distribution ( Fig. 29 ). Eastern North America: Canada: Ontario; United States: Georgia, Florida

Type material. Holotype ♂. CANADA: Ontario: Kent Co., Rondeau Provincial Park, South Point trail nr east parking lot, 15.v–28.viii.1994, Buck , Marshall , Malaise trap, (DEBU) [debu01140022] .

Paratypes. CANADA: Ontario: 4452 Rowsome Rd., Elizabethtown , 44.6213°N, 76.273°W, 120m, 1♂, 12.vii.2010, J. Sones (BIOUG), Kent Co. , Rondeau Provincial Park, South Point trail nr east parking lot, 42.2617°N, 81.8469°W, 1♀, 17–24.vii.2006, S.A. Marshall, Malaise trap (DEBU), 1♀, 7–16.vii.2001, Marshall et al., Malaise trap (DEBU) , Puslinch, Property of Bob Hanner , 43.4464°N, 80.2512°W, 335m, 1♂, 1♀, 04.ix.2008, T. Terzin (BIOUG), 1♂, 18.ix.2008, T. Terzin (BIOUG) , Thousand Islands National Park , 44.4534°N, 75.865°W, 1♂, 2–9.vii.2014, M. Brown, Malaise trap (BIOUG) , Wellington County , Puslinch Township , 43.54°N, 80.14°W, 320m, 2♀, 10.vii.2010, P. Hebert (BIOUG) . UNITED STATES: Florida: Archbold Biol. Sta., 27.18°N, 81.35°W, 1♀, 9–18.xii.1985, S.A.

Marshall, flight interception trap (DEBU); Georgia: Forsyth , 33.03°N, 83.94°W, 2♀, 2.vi.1970 (CNC) .

Etymology. The specific name refers to the very short flagellum, from the Latin brevis meaning short and Greek keraia meaning antenna, or any horn-like structure.

Figures

FIGURE 13. Paramyia brevikeraia 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 14. Paramyia brevikeraia male genitalia (A) lateral, (B) posterior, (C) surstylus, (D) basal surstylus structure. Scale bar = 0.1 mm.

FIGURE 29. Distribution map of Paramyia brevikeraia and Paramyia silvestris. (created by Simplemappr)