Roederiodes Coquillett 1901
Creators: name: Sinclair, Bradley J.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Empididae
Roederiodes

description: Key to New World species of Roederiodes
1 Seven or eight weak dorsocentral setae (Fig. 10); ocellar and vertical setae weak (Fig. 10) (only males distinguishable).... 2
- Five strong dorsocentral setae (Fig. 11); ocellar and vertical setae strong (Fig. 11).................................. 3
2 Male terminalia with clasping cercus broad and rounded apically (Fig. 17) [Arizona, New Mexico]..... R. chillcotti sp. nov.
- Male terminalia with clasping cercus narrow, recurved, with stout apical setae (Fig. 29) [Arizona, California, New Mexico]...................................................................................... R. wirthi Chillcott
3 Base of M 2 forming distinct crossvein at apex of cell dm, longer than r-m crossvein (Fig. 8) [Colorado, Utah, Manitoba, Northwest Territories]..................................................................... R. distinctus Chillcott
- Base of M 2 forming indistinct crossvein at apex of cell dm, shorter than r-m crossvein or crossvein absent and veins M 1 and M 2 petiolate, coalescing for short distance (Figs 5, 6, 9)......................................................... 4
4 Antennal stylus 2 times longer than postpedicel (Fig. 12); upper face brown...................................... 5
- Antennal stylus up to 1.5 times longer than postpedicel (Fig. 7); upper face with blue pruinescence.................... 7
5 Prescutellar depression with central whitish pruinescent stripe (as in Fig. 14); male terminalia with clasping cercus long and slender anteriorly (Fig. 24) [Arizona, Baja California]......................................... R. notialis sp. nov.
- Prescutellar depression without whitish pruinescent stripe (as in Fig. 15); male terminalia with clasping cercus subtriangular (Fig. 23)............................................................................................ 6
6 Ocellar setae shorter than postpronotal seta; male unknown [Cocos Island, Costa Rica]............... R. wigginsi Wilder
- Ocellar setae longer than postpronotal seta; male terminalia with clasping cercus subtriangular, produced posteriorly (Fig. 23) [Southern Appalachians, USA].......................................................... R. moultoni sp. nov.
7 Pleura brown to dark brown, with bluish pruinescence (Figs 5, 6); if pale brown, then prescutellar depression with whitish or bluish pruinescent stripe (Fig. 14) or hind tibia with distinct ventral setae [North America, north of Arizona]............ 8
- Pleura pale brown, without bluish pruinescence (Fig. 13) [Arizona, Costa Rica] (females indistinguishable beyond this couplet)............................................................................................... 9
8 Hind tibiae without distinct ventral setae; prescutellar depression with central whitish or bluish pruinescent stripe (Fig. 14); male terminalia with clasping cercus broad and rounded apically (Fig. 21)........................ R. junctus Coquillett
- Hind tibiae with distinct ventral setae; prescutellar depression without central pale pruinescent stripe (Fig. 15); male terminalia with clasping cercus narrow and sickle-shaped (Fig. 25).................................... R. recurvatus Chillcott
9 Male terminalia with clasping cercus long and slender anteriorly (Fig. 22) [Arizona].............. R. lawrencei sp. nov.
- Male terminalia with clasping cercus little prolonged anteriorly (Figs 16, 18, 19, 30) [Costa Rica].................... 10
10 Male terminalia with distinctly prolonged anterior and posterior corners of clasping cercus (Fig. 18) R. costaricensis sp. nov.
- Male terminalia with clasping cercus at most only slightly expanded anteriorly and posteriorly (Figs 16, 19, 30)......... 11
11 Male terminalia with clasping cercus truncate anteriorly, not projecting (Fig. 30)..................... R. woodi sp. nov.
- Male terminalia with clasping cercus distinctly projecting anteriorly (Figs 16, 19)................................. 12
12 Male terminalia with clasping cercus somewhat slender, longer than height of epandrium; posterior margin broadly expanded (Fig. 19).............................................................................. R. dedota sp. nov.
- Male terminalia with clasping cercus quadrate, not longer than height of epandrium; posterior margin narrowly expanded (Fig. 16).................................................................................. R. browni sp. nov.
description: Published as part of Sinclair, Bradley J., 2023, Revision of New World species of Roederiodes Coquillett (Diptera: Empididae: Clinocerinae), pp. 336-364 in Zootaxa 5301 (3) on page 339, DOI: 10.11646/zootaxa.5301.3.2, http://zenodo.org/record/8030504