Insecta - Diptera - Bibionidae

Alternative combination: Plecia creedensis

Full reference: M. T. James. 1938. Fossil Insects from the Creede Formation, Colorado Part 1. Diptera family Bibionidae. Psyche 45:114-115

Belongs to Penthetria according to S. J. Fitzgerald 1999

Sister taxa: Penthetria abacula, Penthetria alderensis, Penthetria beskonakensis, Penthetria bohemica, Penthetria brevipennis, Penthetria bucklandi, Penthetria elegans, Penthetria fryi, Penthetria gracilis, Penthetria inflata, Penthetria intermedia, Penthetria lapidaria, Penthetria livida, Penthetria longa, Penthetria longifurca, Penthetria lugens, Penthetria lygaeoides, Penthetria marinosi, Penthetria rubiensis, Penthetria whipsawensis

Type specimen: MCZ 4523, an exoskeleton (female well preserved). Its type locality is Creede MCZ collection, which is in an Oligocene crater lake shale in the Creede Formation of Colorado.