Helenodora is an extinct genus of velvet worm from the Carboniferous. In Biology and Ecology, extinction is the cessation of existence of a Species or group of taxa. A genus (plural genera from Γένος Latin genus "descent family type gender" is a low-level Taxonomic The velvet worms ( Onychophora — literally "claw bearers" form a Clade within the Ecdysozoa and can be simply described as " Worms The Carboniferous is a geologic period and system that extends from the end of the Devonian period about 359 The type species is H. In Taxonomy, a type species is the species that originally defined a genus. inopinata.

References

• Evolution of the Insects by David Grimaldi and Michael S. Engel
• 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

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