Shear, 2003 
Causeyella causeyae, Causey's cave millipede, is a millipede, ghostly white in color, which was first noticed, but not identified, in 1964. It was discovered in caves in Arkansas in 2004. It has been found in 10 caves in Izard, Independence, and Stone counties.
- William A. Shear (2003). "The milliped family Trichopetalidae, Part 1: Introduction and Genera Trigenotyla Causey, Nannopetalum n. gen., and Causeyella n. gen. (Diplopoda: Chordeumatida, Cleidogonoidea)" (PDF). Zootaxa. 321: 1–36.
- "Millipedes Found in Arkansas Caves are New to Science". The Nature Conservancy. 2004-04-07.
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