Salishomyia, Bickel, 2019

Dale E. Greenwalt, Daniel J. Bickel, Peter H. Kerr, Gregory R. Curler, Brian V. Brown, Herman de Jong, Scott J. Fitzgerald, Torsten Dikow, Michal Tkoč, Christian Kehlmaier & Dalton De Souza Amorim, 2019, Diptera of the middle Eocene Kishenehn Formation. I. Documenting of diversity at the family level, Paleontologia Electronica 22 (2), No. 50, pp. 1-56 : 31-32

Genus SALISHOMYIA Bickel, gen. nov.

zoobank.org/ DD02F2B7-F02B-4083-92BF-B2D10F4B30B 3 Type species. Salishomyia eocenica Bickel , gen. et sp. nov., by monotypy.

Figure 27

Etymology. Salishomyia is a combination of the name of the indigenous Salish people who inhabited the region in Montana where the Kishenehn formation occurs (and who were referred to by outsiders as “Flatheads”), and “myia” from Greek meaning “fly”. The gender is feminine.

Holotype. USNM 622501 , deposited in the Department of Paleobiology , National Museum of Natural History (NMNH), Smithsonian Institution, Washington, District of Columbia, USA.

Type horizon. Middle Eocene Coal Creek member, Kishenehn Formation.

Type locality. Dakin site, Middle Fork of the Flathead River (Pinnacle, Montana).

Differential diagnosis. Small (<1.5 mm body length) flies in the subfamily Medeterinae ; antenna short; postpedicel subrectangular and rounded, with apical arista, dorsal postcranium concave; posterior mesonotum apparently flattened; legs elongate, without strong setation and without evidence of anterior preapical setae on femora II and III; hypopygium with epandrium spheroidal and fully exserted, not enclosed by anterior postabdominal segments; wing rather broad; R 2+3 joining costa at 5/6 distance from base; R 4+ 5 in gentle anterior arc and joining C just anterior to wing apex; vein M basally diverging from R 4+5, and at midlength with gentle bend to arch forward towards R 4+5 with the two veins becoming subparallel in

distal sixth of wing, and M joining margin at apex; crossvein dm-m positioned basally, with ratio of length of dm-m crossvein/distal section M 4 = 0.3.

Figures

FIGURE 27. Salishomyia eocenica sp. nov., USNM 622501. 1, Habitus; 2, Right wing. Scale bars equal 1.0 mm (1) and 0.5 mm (2).