Diptera of the middle Eocene Kishenehn Formation. I. Documenting of diversity at the family level Author Dale E. Greenwalt Author Daniel J. Bickel Author Peter H. Kerr Author Gregory R. Curler Author Brian V. Brown Author Herman de Jong Author Scott J. Fitzgerald Author Torsten Dikow F8869067-4618-4CCE-960C-E8A107F162FB 0000-0003-4816-2909 Author Michal Tkoč Author Christian Kehlmaier Author Dalton De Souza Amorim text Paleontologia Electronica 2019 22 2 50 1 56 journal article 10.26879/891 3990295 A6C79E56-3CCC-484E-B6AF-EAEEE1695FF6 Sciara florissantensis Cockerell, 1917 , reassigned. Figure 18 Material examined. Holotype , USNM 61995 , housed in the National Museum of Natural History , Washington , D.C. , USA . Type horizon. Florissant Formation, latest Eocene. Type locality. Florissant , Colorado . Remarks Sciara florissantensis was described by Cockerell (1917a) as a male. The body length is 4.5 mm , wing 3.6 mm ; wings hyaline, veins not setose; Sc colorless, R 1 long, its length 60% of R 4+5 ; r-m approximately 0.38 mm long, fork of media not preserved; first two antennal joints short and broad, following ones cylindrical, longer than broad; apical part of gonostyle slender (Figure 18.1-3). This specimen was not figured by Cockerell. Figure 18.3 herein shows that nothing of the medial or cubital veins is preserved. Although Cockerell pro- vided a measurement for the stem of M, this vein is not visible in the fossil. There is some pigmentation at the base of the costal cell, but the preservation of Sc is debatable — a tibia covers part of this portion of the wing. There is nothing to indicate that the specimen belongs to Sciaridae let alone Sciara . We therefore assign this specimen to Sciaroidea incertae sedis.