Belongs within: Laphriinae.
The Atomosini are a group of small, sparsely haired robber flies.
Characters (from Wood 1981): Small rather bare species, less than 20 mm long, often with punctate mesonotum and abdomen. Antenna blunt apically; first flagellomere either with short bristle arising near middle of dorsal surface, or with stylus at apex. Palpus two-segmented. R2+3 joining R1 proximal to end of R1, cell r1 thus separated from wing margin; crossvein m-cu present, apex of cell bm closed by three veins. Postmetacoxal region with transverse heavily sclerotised bridge with posterodorsal margin V-shaped. Anatergite with bristly pile.
<==AtomosiniBT04 |--AdelodusBT04 |--Atomosiella antennataW81 |--Atractimosia filamentosaF09 |--Bathropsis basalis [incl. B. delgadoi]F09 |--DissmeryngodesF09 |--*Strombocodia elegansF09 |--AtomosiaF09 | |--A. puellaW81 | `--A. tibialisF09 |--AtoniomyiaW81 | |--A. ancyloceraF09 | `--A. duncaniW81 |--AphestiaF09 | |--A. annulipesF09 | `--A. nigraF09 |--AphractiaF09 | |--A. comata [=Atractia comata]F09 | `--A. vivax [=Atractia vivax]F09 |--ProtichismaF09 | |--*P. longimanaF09 | `--P. albibarbisF09 |--OidardisF09 | |--*O. gibbosaF09 | |--O. aenescensF09 | |--O. gibbumF09 | `--O. signasetaF09 |--CerotainiaW81 | |--C. albipilosaW81 | |--C. femineaF09 | |--C. macroceraW81 | |--C. minimaF09 | `--C. ornatipesF09 |--AtractiaF09 | |--A. (Atractia) [incl. Lophoceraea]F09 | | |--*A. (A.) psilogasterF09 | | |--A. (A.) disparF09 | | |--A. (A.) marginataF09 | | `--A. (A.) pennata [=*Lophoceraea pennata]F09 | `--A. (*Hybozelodes) nigellusF09 `--EumecosomaF09 |--+--*E. pleuriticumF09 | `--E. tarsalisF09 `--+--E. calvertiF09 |--E. componensF09 |--E. shropshireiF09 `--E. staurophorumF09
*Type species of generic name indicated
References
[BT04] Bybee, S. M., S. D. Taylor, C. R. Nelson & M. F. Whiting. 2004. A phylogeny of robber flies (Diptera: Asilidae) at the subfamilial level: molecular evidence. Molecular Phylogenetics and Evolution 30: 789–797.
[F09] Fisher, E. M. 2009. Asilidae (robber flies, assassin flies, moscas cazadoras, moscas ladronas). In: Brown, B. V., A. Borkent, J. M. Cumming, D. M. Wood, N. E. Woodley & M. A. Zumbado (eds) Manual of Central American Diptera vol. 1 pp. 585–632. NRC Research Press: Ottawa.
[W81] Wood, G. C. 1981. Asilidae. In: McAlpine, J. F., B. V. Peterson, G. E. Shewell, H. J. Teskey, J. R. Vockeroth & D. S. Wood (eds) Manual of Nearctic Diptera vol. 1 pp. 549–573. Research Branch, Agriculture Canada.