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 protoberidis Cockerell, 1915 , reassigned Figure 20 Material examined. Holotype , USNM 61437 , housed in the National Museum of Natural History , Washington , D.C. , USA. Type horizon. Bembridge Marls , UK , Latest Eocene Type locality. Gurnard Bay , Isle of Wight , UK Remarks Sciara protoberidis is an insect body of 1.83 mm in length through tergite 5, 2.23 mm to the end of what may be the terminalia. Head not elongate. Wing length, 1.87 mm (left) and 1.71 mm (right), width 0.63 mm . No macrotrichia visible on any of the veins. Right wing R 1 and R 4+5 1.16 mm and 1.5 mm in length, respectively (7:9). Fork of M 0.73 mm in length, maximum width twice that at the wing’s margin, as figured by Cockerell; stem of M not preserved, at most as long as fork, probably shorter. There are no morphological characters present that distinguish this specimen from the many genera of the family or the families within Sciaroidea. We assign S. protoberidis to Sciaroidea incertae sedis.