Temporal range: 40–0 Ma
Global range of Onychophora: Peripatidae in green, Peripatopsidae in red
Peripatidae is a family of velvet worms. The oldest putative representatives of the family herald from Burmese amber dated to the mid-Cretaceous, around 100 Ma, with representatives from Dominican and Baltic amber attesting to a broader distribution in the Palaeogene / Neogene; molecular variability suggests that the family’s crown group may have arisen in the early Mesozoic.
The Peripatidae exhibit a range of derivative features. They are longer, on average, than the Peripatopsidae and also have more leg pairs, numbering between 22 and 43—the gonopore is always between the penultimate pair. There are no oviparous species—the overwhelming majority are viviparous. The females of many viviparous species develop a placenta with which to provide the growing embryo with nutrients.
The Peripatidae are restricted to the tropical and subtropical zones; in particular, they inhabit Central America, northern South America, Gabon, Northeast India, and Southeast Asia.
Cerradopatus Oliveira et al. 2015
†Cretoperipatus Engel & Grimaldi, 2002
Eoperipatus Evans, 1901
Epiperipatus Clark, 1913
Heteroperipatus Zilch, 1954
Macroperipatus Clark, 1913
Mesoperipatus (Bouvier, 1898)
Oroperipatus Cockerell, 1908
Peripatus Guilding, 1826
Plicatoperipatus (Grabham & Cockerell, 1892)
Principapillatus Oliveira et al. 2013
Speleoperipatus Peck, 1975
Typhloperipatus Kemp, 1913
^ Oliveira I., Hering L., & Mayer, G. “Updated Onychophora checklist”. Onychophora Website. Retrieved 24 November 2016. CS1 maint: Multiple names: authors list (link)
^ Murienne, J.; Daniels, S. R.; Buckley, T. R.; Mayer, G.; Giribet, G. (2013). “A living fossil tale of Pangaean biogeography”. Proceedings of the Royal Society B: Biological Sciences. 281 (1775): 20132648. doi:10.1098/rspb.2013.2648.
^ Oliveira, I. S.; Read, V. M. S. J.; Mayer, G. (2012). “A world checklist of Onychophora (velvet worms), with notes on nomenclature and status of names”. ZooKeys. 211: 1–70. doi:10.3897/zoo