Helenodora és un gènere extint d'onicòfors del període Carbonífer.[1] L'única espècie és H. inopinata.
- The Cambrian Fossils of Chengjiang, China: The Flowering of Early Animal Life by Xian-Guang Hou, Richard J. Aldridge, Jan Bergstrom, and David J. Siveter
- Fossil onychophorans from Dominican and Baltic amber: Tertiaptus dominicanus n.g., n.sp. (Tertiapatidae n.fam.) and Succinipatopsis balticus n.g., n.sp. (Succinipatopsidae n.fam.) with a proposed classification of the subphylum Onychophora by George Poinar. In: Invertebrate Biology, v. 119, no. 1, p. 104-109, 2000.
- A possible onychophoran from the Middle Pennsylvanian Mazon Creek Beds of Northern Illinois by Ida Thompson, and Douglas S. Jones. In: Journal of Paleontology, v. 54, no. 3, p. 588-596, 1980.
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