Adoutte, A., Guillaume, B., Lartillot, N., Lespinet, O., Prud'homme, B., de Rosa, R. (2000). The new animal phylogeny: Reliability and implications. Proceedings of the National Academy of Science, 97 (9): 4453-4456.

Alexander, A.J. (1957). Notes on onychophoran behaviour. Annals of the Natal Museum, 14: 35-43.

Alexander, A.J. (1961). Peripatus, fierce little giant. Animal Kingdom, 61: 122-125.

Anderson, D.T. (1966). The comparative early embryology of the Oligochaeta, Hirudinea, and Onychophora. Proceedings of the Linnean Society, NSW, 91 (1): 10-43.

Anderson, D.T. (1973). Onychophorans. In: Anderson D.T.; Embryology and Physiology in Annelids and Athropods. Int. Ser. Monogr. Pure and appl. Biol. (Zool), 50: 93-126. Oxford (Pergamon Press).

Anderson, D.T., and Manton, S.M. (1972). Studies on the Onychophora. VIII. The relationship between the embryos and the oviduct in the viviparous placental onychophorans Epiperipatus trinidadensis BOUVIER and Macroperipatus torquatus KENNEL from Trinidad. Phil. Trans. Roy. Soc., (B) 264 (860): 161-189.

Andrews, E.A. (1933). Peripatus in Jamaica. Quarterly Review of Biology, 8: 155-163.

Arnett, R.H. (1961). The Onychophora of Jamaica. Entomology News, 72: 213-220.

Baehr, M. (1977). Uber einige Onychophoren aus Australien und Tasmanien mit Beschreibung einder neuen Art un Anmerkungen zur Stellung von Ooperipatus paradoxus BOUVIER. 1915. Zoologische Jahrbuecher Abteilung fuer Systematik Oekologie und Geographie der Tiere (Jena), 104, 9-19.

Balfour, F. (1883). The anatomy and development of Peripatus capensis. Quarterly Journal of Microscopic Science, N. S, 23: 213-259.

Ballard, J.W.O., Olsen, G.J., Faith, D.P., Odgers, W.A., Rowell, D.M., Atkinson, P.W. (1992). Evidence from 12S ribosomal RNA sequences that Onychophorans are modified arthropods. Science, 258: 1345-1348.

Bartolomaeus, T., Ruhberg, H. (1999). Ultrastructure of the body cavity lining in embryos of Epiperipatus biolleyi (Onychophora, Peripatidae) - a comparison with annelid larvae. Invertebrate Biology, 118(2): 165-174.

Bicudo, JEPW, Campiglia, S. (1985). A morphometric study of the tracheal system of Peripatus acaioi Marcus et Marcus (Onychophora). Respiration Physiology, 60: 75-82.

Bouvier, E. -L. (1898). Sur l'organisation du Peripatus Tholloni Bouv. [Onych.]. Bulletin Societe Entomologique de France, 197-198.

Bouvier, E. -L. (1899). Sur les variations et les groupements spécifiques des Péripates Americans. Comptes Rendus Academie des Sciences (Paris) 128, 1344-6.

Bouvier, E. -L. (1900). Quelques observations sur les onychophores (Peripatus) de la collection du Musee Britannique. Quarterly Journal of Microscopical Science, 43: 367-373.

Bouvier, E. - L. (1902). Peipatus Biolleyi, Onychophore mouveau de Costa-Rica. Bulletin Societe Entomologique de France, 258-9

Bouvier, E. -L. (1904). Les Oeufs des Onychophores. Museum d'Histoire Naturelle de lyon. Nouvelles Archives, 4(6), 1-50.

Bouvier, E. -L. (1905). Monographie des Onychophores 1. Annals des Sciences Naturelles B. Zoologie, Ser. 9. (2): 1-383. Paris (Masson).

Bouvier, E. -L. (1907). Monographie des Onychophores 2. Annals des Sciences Naturelles B. Zoologie Ser 9. (5): 61-318.

Bouvier, E. - L. (1914). Un nouveau Paraperipatus de Ceram. Bulletin of the Museum National d'Histoire Naturelle. Section A. Zoologie, Biologie, et Ecologie Animales 20, 222-225.

Bouvier, E. -L. (1915). Results of Dr E. Mjōbergs Swedish Scientific Expeditions to Australia 1910-1913. Onychophora. Arkiv foer Zoologi, 10(1), 1-23.

Brink, P. (1957). Onychophora, a review of the South African species with a discussion on the significance of the geographical distribution of this group. In: Hanstrōm B., Brink, P., Rudebeck, G., eds. South African Animal Life, Stockholm, 4: 6-32.

Briscoe, D.A., Tait, N.N. (1995). Allozyme evidence for extensive and ancient radiations in Australian Onychophora. Zoological Journal of the Linnean Society, 114, 91-102.

Brues, C.T. (1911). A new species of Peripatus from Grenada, with observations on other species of the genus. Bull. Mus. Comp. Zool., 54: 305-318.

Brues, C.T. (1914). A new species of Peripatus from Colombia. Bulletin of the Museum of Comparative Zoology, 58: 375-382.

Brues, C.T. (1917). A new species of Peripatus from the mountains of northern Peru. Bulletin of the Museum of Comparative Zoology, 61: 383-387.

Brues, C.T. (1923). The geographical distribution of the Onychophora. American Naturalist, 57: 210-17.

Brues, C. T. (1935). Varietal forms of Peripatus in Haiti. Psyche, Camb., 42: 58-62.

Camerano, L. (1898). Nouva specie di Peripatus dell' Equador. Sulla striatura transversale dei muscoli delle mandiboli degli Onicofori. Memoire della Reale accademia delle scienze di Torino, 33:589-93.

Campiglia, S., Lavallard, R. (1973). Contributions a la biologie de Peripatus acacioi Marcus et Marcus: 2, Variations du poids des animaux en fonction du sexe et du nombres des lobopodes. Bol. Zool. Mar. N.S. 30: 499-512.

Campiglia, S., Maddrell, S.H.P. (1986). Ion absorption by the distal tubules of onychophoran nephridia. Journal of Experimental Biology, 121: 43-54.

Campiglia, S., and Walker, M.H. (1995). Developing Embryo and Cyclic Changes in the Uterus of Peripatus (Macroperipatus) acaioi (Onychophora, Peripatidae). Journal of Morphology, 224: 179-198.

Clark,A.H. (1913a). A revision of the American species of Peripatus. Biological Society of. Washington, Proceedings. 16: 15-20.

Clark, A.H. (1913b). Piccole note su delgi Onychophora. Zool. Anz., 42: 253-254.

Clark, A.H. (1915a). A note on the occurrence of Epiperipatus imthurni (Sclater). . Biological Society of. Washington, Proceedings. 28: 182.

Clark, A.H. (1915b). The present distribution of the Onychophora, a group of terrestrial invertebrates. Smithsonian Miscellaneous Collections, 65: 1-25.

Clark, A.H. (1929). Peripatus from the island of Montserrat. Proc. Ent. Soc. Washington. 31: 139.

Clark, A.H. (1937). On some Onychophores from the West Indies and Central America. Proc. U.S. Nat. Mus. 85: 1-3.

Clark, A.H., Zetek, J. (1946). The Onychophores on Panama and the Canal Zone. Proc. U.S. Nat. Mus., 96: 205-213.

Claude Joseph, H. (1928). Observations sur un peripate du Chile (Opisthopatus blainvillei Gay gervais). Ann. Sci. Nat. Zool. Paris. 10ser. 11: 285-298.

Cockerell, T.D.A. (1908). Review of Monographie des Onychophores by E.L. Bouvier, extracted from Annales de Sciences Naturelles, Zoologie (1907). Science, 27, 619-21.

Cuenot, L. (1949). Les Onychophores. In: Grassé P.P. ed., Traite de Zoologie, Vol. 6. Paris: Masson, 3-37.

Daiber, M. (1921). Protracheata (Onychophora). In: LANG, A. (Hrsg): Handbuch d. Morphologie d. Wirbellosen Tiere. 4: 351-371. Jena (G. Fischer).

Dakin, W.J. (1920). Fauna of Western Australia. III. Further contribution to the study of the Onychophora. The anatomy and systematic position of West Australian Peripatoides, with an account of certain historical details of general importance in the study of Peripatus. Zoological Society of London, Proceedings, 367-89.

Dendy, A. (1889). Observations on the Australian species of Peripatus. Royal Society of Victoria, Proceedings 2, 50-62.

Dendy, A. (1890). Preliminary account of a new Australian Peripatus. Victorian Naturalist, 6 (12): 173-6.

Dendy, A. (1891). The reproduction of Peripatus leuckarti Sanger. Zool. Anz. 14 (380): 461-463.

Dendy, A. (1894a). Note on a new variety of Peripatus novae-zealandiae, Hutton. Transactions of the New Zealand Institute (Zoology), 27: 190-1.

Dendy, A. (1894b). The hatching of a Peripatus egg. Proceedings of the Royal Society of Victoria (New Series) 6: 118-119.

Dendy, A. (1900). Preliminary not on a proposed new genus of Onychophora. Zoologischer Anzeiger, 23: 415-16.

Dendy, A. (1902). On the oviparous species of Onychophora. Quarterly Journal Microscopical Science, 45 (3): 363-415.

Dendy, A. (1906). Note on the supposed type specimen of Peripatus leuckarti Saenger, and on the Nomenclature of the Australian Onychophora. Zoologischer Anzeiger, 30: 175-7.

Dzik, J., Krumbiegel, G. (1989). The oldest 'onychophoran' Xenusion: a link connecting phyla? Lethaia, 22: 169-81.

Eakin, R.M., Westerfall, J.A. (1965). Fine structure of the eye of Peripatus (Onychophora). Z. Zellforsch, 68: 278-300.

Eakin, R.M., Brandenburger, J.L. (1966). Fine structure of the antennal receptors in Peripatus. Amer. Zoologist, 6: 614.

Elliot, S., Tait, N.N., Briscoe, D.A. (1993). Apheromonal function for the crural glands of the onychophoran Cephalofovea tomahmontis (Onychophora: Peripatopsidae). Journal of Zoology, 231: 1-9.

Endrody-Younga, S., Peck, S.B. (1983). Onychophora from mesic grassveld in Aouth Africa (Onychophora: Peripatopsidae). Annals of the Transvaal Museum, 33: 347-352.

Evans, R. (1901). On Two New Species of Onychophora from the Siamese Malay States. Quart. Journ. Microsc. Science, N. S., 44 (4): 473-538. Evans, R. (1902). On the Malayan Species of Onychophora. Part II. The Development of Eoperpatus weldoni. Quarterly Journal of Microscopical Science, 45: 41-78.

Fletcher, J.J. (1895). On the specific identity of the Australian Peripatus usually supposed to be P. leuckartii, Saenger. Proceedings of the Linnean Society of New South Wales (Second Series) 10: 172-194.

Froehlich, G.C. (1968). On some Brazillian Onychophores. Beitrage Zur Neotropischen Fauna, 5 (3): 160-171.

Fuhrmann, O. (1913). Ūber einige neve neotropische Peripatus - Arten. Zoologischer Anzeiger 42 (6): 241-8.

Gravier, Ch., and Fage, L. (1925). Sur une nouvelle espèce de péripate du chili (Opisthopatus costesi). Annales des Sciences Naturelles. B. Zoologie 8 (10^th series), 185-200.

Grube, E. (1853). Ūber den Bau von Peripatus Edwardsii. Archiv fuer Anatomie und Physiologie. Physiologische Abteilung, 20: 322-60.

Ghiselin, M.T. (1984). Peripatus as a living fossil. In: Eldredge, N. And Stanley, S.M. (eds). Living Fossils. New York, Springer-Verlag.

Ghiselin, M.T. (1985). A Moveable Feaster. Natural History, 94: 54-61.

Guilding, L. (1826). Molluscs Caribbaeana. An account of a new genus of Mollusca. Zoological Journal (London), 2 (14): 437-444.

Hackman, R.H., Goldberg, M. (1975). Peripatus: its affinities and its cuticle. Science, 190: 582-583.

Hardie, R. (1975). The riddle of Peripatus. Australian Nat. Histo. 18 (5): 180-185.

Harris, A.C. (1991). A large aggregation of Peripatoides novaezealandiae (Hutton, 1876) (Onychophora: Peripatopsidae). Journal of the Royal Society of New Zealand 21: 405-406.

Hart, J.H. (1896). Peripatus in the West Indian Islands. Nature, 61: 511.

Havel, J.E., Wilson, C.C., Hebert, P.D.N. (1989). Parental investment and sex allocation in a viviparous onychophoran. Oikos, 56: 224-232.

Heatley, N. G. (1936). The digestive enzymes of the Onychophora (Peripatoides sp.). J. Exp. Biol. 13: 329-343.

Hebert, P.D.N., Billington, N., Finston, T.L., Boileau, M.G., Beaton, M.J., Barrette, R.J. (1991). Genetic variation in the onychophoran Plicatoperipatus jamaicensis. Heredity, 67: 221-229.

Heymons, R. (1912). Eine neue Peripatusart (Paraperipatus schultzei n. sp.) aus Deutsch-Neu-Guinea. Sitzungberichte. Gesellschaft Naturforschender Freunde zu Berlin, 3: 215-22.

Hilton, W.A. (1946). Remarks on the habitat of Peripatus on Barro Colorado Island, Canal Zone. J. Ento. Zool. 38: 27.

Holliday, R.A. (1942). Some observations on Natal Onychophora. Ann. Natal Mus. 10: 237-244.

Holliday, R.A. (1944). Further notes on Natal Onychophora. Ann. Natal Mus. 10: 433-452.

Hofmann, K. (1988). Observations on Peripatopsis clavigera (Onychophora: peripatopsidae). Aouth African Journal of Zoology, 23: 255-258.

Horst, R. (1922). Paraperipatus vanheurni n. sp. Zoologische Mededelingen (Leiden), 7: 113-14.

Horst, R. (1923). Paraperipatus keiensis n. sp. Videnskabelige Meddelelser fra Dansk Naturhistorisk Forening, 76: 119-21.

Hutchinson, G.E. (1969). Aysheaia and the general morphology of the Onychophora. American Journal of Science, 267: 1062-1066.

Hutton, F.W. (1876). On Peripatus novae-zealandiae. Annals and Magazine of Natural History, 18 (4): 361-369.

Hutton, F.W. (1878). Further notes on the structure of Peripatus novae-zealandiae. Annals and Magazine of Natural History, 5: 204-206.

Johow, F. (1911). Observaciones sobre los Onicóforos Chilenos. Boletin. Museo Nacional de Historia Natural (Chile), 3 (1): 79-95.

Kato, K. (1968). Histological and histochemical studies on the integument of Peripatus sedgwicki. Sci. Rep. Saitama Univ. Ser. B, Bio. Earth Sci. 5 (2): 83-93.

Kemp, S. (1914). Onychophora: Zoological results of the Abor Expedition. Rec. Indian Museum Records, Calcutta. 13: 471-492.

Kennel, J. Von (1883a): Entwicklungsgeschichte von Peripatus. Zool. Anz., 6 (150): 531-538. Jena.

Kennel, J. Von. (1883b). On the development of Peripatus. Nature, 1885: 92-93

King, D.F. (1979). Peripatus - a living fossil. Geelong Naturalist, 16(2): 26-27.

Krishnan, G. (1970). Chemical nature of the cuticle and its mode of hardening in Eoperipatus weldoni. Acta Histochemica, 37: 1-17.

Lavallard, R., Campiglia, S. (1971). Données cytochimiques et ultrastructurales sur les tubes sécréteurs des glandes de la glu chez. Peripatus acacioi Marcus et Marcus (Onychophora). Zeitschrift fur Zellforschung, 118: 12-34.

Lavallard, R., Campiglia, S. (1973). Contribution à la Biologie de Peripatus acacioi Marcus et Marcus I. Pourcentage des sexes et variations du nombre des lobopods dans un échantillonnage de plusieurs centaines d'individus. Boletim de Zoologia e Biologia Marinha, 30: 483-498.

Lavallard, R., Campiglia, S. (1975a). Contribution à la Biologies de Peripatus acacioi Marcus et Marcus (Onychophore). IV. Elevage au laboratoire. Ciencia e Cultura, 27: 549-556.

Lavallard, R., Campiglia, S. (1975b). Contribution à la Biologie de Peripatus acaioi Marcus et Marcus (Onychophore). V. Etude des Naissances dans un Elevage de laboratoire. Zoologisches Anzeiger Jena, 195: 338-350.

Lavallard, R., Campiglia, S., Parisi Alvares, E., Valle, C.M.C. (1975). Contribution à la Biologies de Peripatus acacioi Marcus et Marcus (Onychophore). III. Etude descriptive de l'habitat. Vie et Milieu, serie C, 25: 87-118.

Lawrence, R.F. (1931). A new peripatopsid from the Table Mountain Caves. Ann. S. Afr. Mus. 30(1): 101-107.

Lawrence, R.F. (1947). Note on a new species of Opisthopatus (Onychophora). Natal Museum Annals, 11 (1): 165-8.

Lawrence, R.F. (1950). Peripatus - a living museum of antiquities. African Wild Life, 4: 112-120.

Locke, M., Huie, P. (1977). Bismuth staining of Golgi complex is a characteristic arthropod feature lacking in Peripatus. Nature, 270: 341-343.

Manton, S.M. (1937). Studies on the Onychophora II. The feeding, digestion, excretion and food storage of Peripatopsis. Philosophical Transactions of the Royal Society of London (Series B) 227: 411-464.

Manton, S.M., Ramsay, J.A. (1937). Studies on the Onychophora. III. The control of water loss in Peripatopsis. Journal of Experimental Biology, 14: 470-472.

Manton, S.M. (1938a). Studies on the Onychophora: IV. The passage of spermatozoa into the ovary in Peripatopsis and the early development of the ova. Phil. Trans. R. Soc. Lond. B, 228: 421-444.

Manton, S.M. (1938). Studies on the Onychophora VI. The life history of Peripatopsis. Annals and Magazine of Natural History, 1: 515-529.

Manton, S.M. (1949). Studies on the Onychophora. VII. The early embryonic stages of Peripatopsis, and some general considerations concerning the morphology and phylogeny of the Arthropoda. Philosophical Transactions of the Royal Society., (B) 233: 483-580. London.

Manton, S.M. (1950). The evolution of arthropodan locomotion mechanisms. Part 1, The locomotion of Peripatus. J. Linn. Soc. Lond. 41: 529-570.

Manton, S.M. (1953). Locomotory habits and the evolution of larger arthropodan groups. Symp. Soc. Exp. Biol. No. 7; Evolution, 339-376. London.

Marcus, E., Marucus, E. (1955). A new Peripatus from Minas Gerais, Brazil. An. Acad. Bras. Cienc. 27: 189-193.

Mesibov, R., Ruhberg, H. (1991). Ecology and conservation of Tasmanipatus barretti and Tasmanipatus anophthalmus, parapatric onychophorans (Onychophora: Peripatopsidae) from northeast Tasmania. Pap. Proc. R. Soc. Tasm., 125: 11-16.

Mets, R. De., Nayak, N.A., Gregoire, C.H. (1975). On submicroscopic structure of the peritrophic membrane and of some excreta of Peripatus trinidadensis (Onychophora) Proc. National Inst. Sci. India. 30B (3 and 4): 131-135.

Monge-Najera, J. (1995). Phylogeny, biogeography and reproductive trends in the Onychophora. Zoological Journal of the Linnean Society, 114 (1): 21-60.

Morera - Brenes, B., Leon, M.D. (1986). Description of Macroperipatus valerioi n. sp. From Costa Rica, and comments on the genus Macroperipatus (Onychophora: Peripatidae). Revista de Biologia Tropical, 34: 277-282.

Morera - Brenes,B., Monge-Najera., J., and Saenz, R. (1988). Parturition in Onychophorans: New Records and a Review. Brenesia, 29: 15-20.

Morera - Brenes,B., Monge-Najera., J. (1990). Epiperipatus hilkae, n. sp. From Costa Rica (Onychophora: Peripatidae). Revista de Biologia Tropical, 38: 449-455.

Morrison, P.R. (1946a). Physiological observations on water loss and oxygen consumption in Peripatus. Bio. Bull. Mar. Bio. Lab. Woods Hole, 91: 181-188.

Morrison, P.R. (1946b). Parturition in Peripatus. Psyche, 53: 1-3.

Moseley, H.N. (1874). On the structure and development of Peripatus capensis. Philosophical Transactions of the Royal Society, 164 (2): 749-782.

Moseley, H.N. (1877). Remarks on observations by Captain Hutton, Director of the Otago Museum on Peripatus novae-zealandiae with notes on the structure of the species. Ann. Mag. Nat. Hist. 4^th ser. 19: 85-91.

Muir, F., Kershaw, J.C. (1909). Peripatus ceramensis n. sp. Quarterly Journal of Microscopical Science 53, 737-40.

New, T.R. (1995). Onychophora in invertebrate conservation: priorities, practice and prospects. Zoological Journal of the Linnean Society 114: 77-89.

Newlands, G., Ruhberg, H. (1978). Onychophora. - In: M.J.A. werger (ed.): Biogeography and ecology of southern Africa. 677-684. (Junk publ. 1978), The Hague.

Nylund, A., Ruhberg, H., Tjønneland, A., Meidell, B. (1988). Heart ultrastructure in four species of Onychophora (Peripatopsidae) and phylogenetic implications. Zoologische Beitraege, 32(1): 17-30.

Oakley, H.W. (1883). On Peripatus capensis. Trans. S. Afr. Phil. Soc. 3: 35-37.

Pearce, E.J. (1960> the occurrence of Peripatus on Barbados. Journal of the Barbados Museum and Historical Society. 28: 2-3.

Peck, S.B. (1975). A review of the New World Onychophora with the description of a new cavernicolous species and genus from Jamaica. Psyche, 82 (3-4): 341-358.

Peck, S.B. (1982). Onychophora. In: Parker S.P. eg. McGraw-Hill synopsis and classification of living organisms. New York: McGraw-Hill, 729-730l

Pflugfelder, O. (1948). Entwicklung von Paraperipatus amboinensis n. sp. Zoologische Jahrbuecher. Abteliung fuer Anatomie und Ontogenie der Tiere, 69: 443-92.

Pocock, R.I. (1892). Peripatus from Saint Vincent. Nature 46: 100.

Pollard, E.C. (1895). Notes on the Peripatus of Dominica. Quart. Journ. Microsc. Sci. 35: 285-293.

Purcell, W.F. (1897): Notes on Onychophora. Transactions of South African Philosophical Society, 9 (1) 18-19. Cape Town.

Purcell, W.F. (1899). On the South African Species of Peripatidae in the Collection of the South African Museum. Annals of the South African Museum., 1: 331-351.

Purcell, W.F. (1900). On the anatomy of Opisthopatus cinctipes PURCELL, with notes on other, principally South African Onychophora. Annals of South African Museum, 2(4): 67-116.

Quelch, J.J. (1886). Peripatus in Demerara. Nature, 34: 288.

Ramskōld, L. (1992). Homologies in Cambrian Onychophora. Lethaia 25: 443-60.

Ramskōld, L., Xianguang, H. (1991). New early Cambrian animal and onychophoran affinities of enigmatic metazoans. Nature, 351: 225-228.

Read, V.M. St. J. (1988a). The application of scanning electron microscopy to the systematics of the neotropical Peripatidae (Onychophora). Zoological Journal of the Linnean Society, 93: 187-223.

Read, V.M. St. J. (1988b). The Onychophora of Trinidad, Tobago, and the Lesser Antilles. Zoological Journal of the Linnean Society 93: 225-257.

Read, V.M. St. J., Hughes, R.N. (1987). Feeding behaviour and prey choice in Macroperipatus torquatus (Onychophora). Proceedings of the Royal Society of London (Series B). 230: 483-506.

Reid, A.L., Tait, N.N., Briscoe, D.A., Rowell, D.M. (1995). Morphological, cytogenetic and allozymic variation within the genus Cephalofovea (Onychophora: Peripatopsidae) with descriptions of three new species. Zoological Journal of the Linnean Society, 114: 115-38.

Reid, A.L. (1996). Review of the Peripatopsidae (Onychophora) in Australia, with comments on Peripatopsid Relationships. Invertebrate Taxonomy, 10: 663-936.

Robson, E.A. (1964). The cuticle of Peripatoides moseleyi. Quart. Journ. Microsc. Sci. 105: 281-299.

Roeper, H. (1977). Analytical investigations on the defensive secretions from peripatopsis moseleyi (Onychophora). Z. Naturforsch Sect. C. Biosci. 32 (1/2): 57-60.

Rowell, D.M., Higgins, A.V., Briscoe, D.A., Tait, N.N. (1995). The use of chromosomal data in the systematics of viviparous onychophorans from Australia (Onychophora: Peripatopsidae). Zoological Journal of the Linnean Society 114: 139-153.

Ruhberg, H., Storch, V. (1976). Zur Ultrastruktur von mannlichem Genitaltrakt, Spermiocytogenese und Spermien von Peripatopsis moseleyi (Onychophora). Zoomorphologie, 85: 1-15.

Ruhberg, H., Storch, V. (1977). Uber Wehrdrusen und Wehrsekret von Peripatopsis moseleyi (Onychophora). Elektrononmikroskopsiche Untersuchungen un Lebendbeobachtungen. Zool. Anz., Jena 198: 9-19.

Ruhberg, H., Storch, V. (1978). Zur Ultrastruktur der accessorischen Genitaldrusen von Opisthopatus cinctipes (Onychophora, Peripatopsidae). Zool. Anz., Jena 200 5/6: 289-299.

Ruhberg, H., Nutting, W.B. (1980). Onychophora: feeding, structure, function, behaviour and maintenance (Pararthropoda). Verh. Naturwiss. Wer. Hamburg (NF) 24 (1): 79-87.

Ruhberg, H. (1985). Die Peripatopsidae (Onychophora). Systematik, Ōkologie, Chorologie und phylogenetisch Aspekte. Zoologica, 137: 1-184.

Ruhberg, H., Storch, V. (1988). 10. Onychophora. In: Reproductive Biology of Invertebrates, Volume III: Accessory Sex Glands. K. G. and R. G. Adiyodi (eds). Oxford & IBH Publishing Co. Pvt. Ltd.: 251-260.

Ruhberg, H., Tait, N.N., Briscoe, D.A., Storch, V. (1988). Cephalofovea tomahmontis n. Gen., n. Sp., an Australian Peripatopsid (Onychophora) with a unique cephalic pit. Zool. Anz., Jena 221, 3/4: 117-133.

Ruhberg, H., Storch, V. (1988). Onychophora - " lebende Fossilien" aus dem Vorfeld der Anthropoden - Evolution. Biologie in unserer Zeit, 18 (6): 168-173.

Ruhberg, H. (1990). 4. Onychophora. In: Adiyodi, K.G. and Adiyodi, R.G. (Hrsg.): Reproductive Biology of Invertebrates. 4, B: Fertilization, Development, and Parental  Care: 61-76. New Dehli, Bombay, Calcutta (Oxford & IBH Publishing).

Ruhberg, Mesibov, R., Briscoe, D.A., Tait, N.N. (1991). Tasmanipatus barretti n. Gen, n. Sp. And Tasmanipatus anophthalmus, n. Gen., n. Sp.: two new and unusual Peripatopsidae (Onychophora) from northeastern Tasmania. Pap. Proc. R. Soc. Tasm., 125: 7-10.

Ruhberg, H. and Read, V. M. St. J. (1992). 16. Onychophora. In Adiyodi, K G. and Adiyodi, R.G.: Reproductive Biology of Invertebrates. 5: Sexual Differentiation and Behaviour: 267-280. New Dehli, Bombay, Calcutta (Oxford & IBH Publishing).

Ruhberg, H. (1992). "Peripatus" - an Approach towards a Modern Monograph. Berichte des Naturwissenschaftlich - Medizinischen Vereins in Innsbruk. 8^th International Congress of Myriapodology, Innsbruck, Austria, July 15-20, 1990. Supplement N. 10, pp. 441-58.

Saenger, H. (1869). Peripatus capensis Sr and Peripatus Leuckartii n. sp. Transactions of the Second Congress of Russian Naturalists In Moscow. Pp. 239-62. [Translated into French: Bouvier, E.L. (1908)]. A propos d'un travail de H. Sānger sur les Peripates. Bulletin of the Societe Philomatique de Paris, 9(3): 5-36.

Sclater, W.L. (1887). Notes on the Peripatus of British Guiana. Proc. Zool. Soc. Lond. 1887: 130-137.

Sclater, W.L. (1888). On the early stages of the development of a South American species of Peripatus. Quart. Journ. Micro. Science., N. S., 28: 343-363. London.

Scott, I.A.W., Rowell, D.M. (1991). Population biology of Euperipatoides leuckartii (Onychophora: Peripatopsidae). Australian Journal of Zoology, 39: 499-508.

Sedgwick, A. (1885a). On the fertilised ovum and formation of the layers of the South African Peripatus. Proceedings of the Royal Society , 39: 239-244. London.

Sedgwick, A. (1885b). The development of Peripatus Capensis. Quarterly Journal of Microscopical Science, 25: 449-66.

Sedgwick, A. (1888a). A monograph on the species and distribution of the genus Peripatus (Guilding). Quart. Journ. Micro. Science, N.S., 28: 431-493. London.

Sedgwick, A. (1888b). The development of the cape species of Peripatus. Part IV. Quart. Journ. Micro. Science, N.S., 28: 373-396. London.

Sedgwick, A. (1895). Peripatus. Cambridge Nat. Histl., 5: 1-26. Cambridge, Mass.

Sedgwick, A. (1909). Onychophora. In 'A Students Textbook of Zoology'. Vol. 3, pp.550-77.

Sheldon, L. (1888). On the development of Peripatus novae-zealandiae. Quart. Journ. Micro. Science., N.S., 28: 205-237. London.

Sheldon, L. (1889). On the development of Peripatus novae-zealandiae. Quart. Journ. Micro. Science., N.S., 29: 283-294. London.

Sheldon, L. (1890). The maturation of the ovum in the cape and New Zealand species of Peripatus. Quart. Journ. micro. Science., N. S., 30: 1-29. London.

Spencer, D. (1909). Description of a new species of Peripatoides from West Australia. Royal Society of Victoria, Proceedings, 21 (2): 309-25.

Steel, T. (1896). Observations on Peripatus. Proceedings of the Linnean Society of New South Wales, 21: 94-103.

Storch, V., Ruhberg, H. (1977). Fine structure of the sensilla of Peripatopsis moseleyi (Onychophora). Cell and Tissue Research, 177: 539-553.

Storch, V., Ruhberg, H. (1977). Zur Entstehung der Spermatophora von Opisthopatus cinctipes PURCELL, 1899 (Onychophora, Peripatopsidae). Zoomorphologie, 87: 263-276.

Storch, V., Ruhberg, H., Alberti, G. (1978). Zur Ultrastruktur der Segmentalorgane der Peripatopsidae (Onychophora). Zool. Jhb. Anat. 100: 47-63.

Storch, V., Alberti, G., Ruhberg, H. (1979). Light and electron microscopical investigations on the salivary glands of Opisthopatus cinctipes and Peripatopsis moseleyi (Onychophora, Peripatopsidae). Zool. Anz., Jena 203: 35-47.

Storch, V., Ruhberg, H. (1983). 20. Onychophora. In: Reproductive Biology of Invertebrates, Volume II: Spermatogenesis and Sperm Function. K.G. and R.G. Adiyodi (eds.). John Wiley and Sons Ltd.: 397-405.

Storch, V., Holm., P., Ruhberg, H. (1988). Zur Ultrastruktur and Histochemie des Darmkanals verschiedener Onychophora. Zool. Anz., Jena 221, 5/6: 281-294.

Storch, V., Ruhberg, H. (1990). Electron microscopic observations on the male genital tract and sperm development in Peripatus sedgwicki (Peripatidae, Onychophora). Invertebrate Reproduction and Development, 17 (1): 47-56.

Storch, V., Ruhberg, H. (1993). 2: Onychophora. In: Microscopic Anatomy of Invertebrates, Volume Xi: Onychophora, Chilopoda, and Lesser Protostomata. F.W. Harrison and M. E. Rice (eds.), Wiley-Liss (Publ.) New York. pp. 11-56.

Sundara Rajulu, G., Gouri, N. (1988). Discovery of Pro-Onychophoran marine worms. Description of the Holotype. Indian Zoologist, 12: 61-64.

Tait, N.N., Briscoe, D.A. (1990). Sexual head structures in the Onychophora: unique modifications for sperm transfer. Journal of Natural History, 24: 1517-1527.

Tait, N.N., Stutchbury, R.J., Briscoe, D.A. (1990). Review of the discovery and identification of Onychophora in Australia. Linnean Society of New South Wales, Proceedings, 112 (2): 153-71.

Tait, N.N., Briscoe, D.A. (1995). Genetic differentiation within New Zealand Onychophora and their relationships to the Australian fauna. Zoological Journal of the Linnean Society, 114:  91-102.

Thompson, I., Jones, D.S. (1980). A possible onychophoran from the Middle Pennsylvanian Mazon Creek beds of northern Illinois. Journal of Paleontology, 54: 588-596.

Van der Lande, V. (1978). The occurrence, culture, and reproduction of Peripatoides gilesii spencer (Onychophora) on the Swan coastal plain. Western Australian Naturalist. 41 (2): 29-36.

Van der Lande, V. (1991). Native and introduced Onychophora in Singapore. Zoological Journal of the Linnean Society, 102: 101-114.

Van der Lande, V., Holthius, L.B. (1986). The type locality of Eoperipatus sumatranus (Sedgwick, 1888), with biographical notes on its collector EJE Hekmeijer. Zoologische Bijdragen, Leiden, 33: 1-22.

Walker, M. (1986). An SEM view of Peripatus, the Velvet Worm. Proceedings RMS, 21 (4): 207-212.

Walker, M. (1992a). Scanning Electron Microscope Observations of Embryonic Development in Opisthopatus cinctipes PURCELL (Onychophora, Peripatopsidae). Ber. Nat. -med. Verein Innsbruck. Suppl. 10: 459-464. Innsbruck. (Abst. 8^th Int. Congress of Myriapodology, Innsbruck, Austria, July 15-20, 1990).

Walker, M. (1992b). Seminal Receptacula in the Female Reproductive Tract of Opisthopatus cinctipes Purcell (Onychophora. Peripatopsidae). Journal of Morphology, 213: 15-20.

Walker, M., and Campiglia, S. (1988). Some aspects of segment formation and post-placental development in Peripatus acacioi Marcus and Marcus (Onychophora). Journal of Morphology, 195: 123-140.

Walker, M., and Campiglia, S. (1990). Some Observations on the Placenta and Embryonie Cutical during Development in Peripatus acacioi Marcus and Marcus (Onychophora, Peripatidae). In Minelli, H and Brill, E.J. (Publ.): Proceedings of the 7^th International Congress of Myriapodology: 449-459. Leiden, New York, Kobenahaven, Koln.

Walker, M.H. (1995). Relatively recent evolution of an unusual pattern of early embryonic development (long germ band?) in a South African onychophoran. Opisthopatus cinctipes Purcell (Onychophora, Peripatopsidae). Zoological Journal of the Linnean Society, 114 (1): 61-75.

Ward, J.R. (1897). Notes on Peripatus moseleyi. Journ. Queckett Microsc. Club. 6 (2): 424-428.

Watt, J.C. (1961). The New Zealand Onychophora. Tane 8: 95-103. Auckland, The Auckland University Field Club.

Wedeen, C.J., Kostriken, R.G., Leach, D., Whitington, P. (1997). Segmentally iterated expression of an engrailed-class gene in the embryo of an australian onychophoran. Dev. Genes Evol., 270: 282-286.

Wheeler, W.M. (1898). A new Peripatus from Mexico. Journal of Morphology, 15: 1-8.

Willey, A. (1898). The anatomy and development of Peripatus novae-britanniae. In 'Zoological Results based on material from New Britain, New Guinea, Loyalty Islands and elsewhere collected in 1895, 1896 and 1897'. Vol. 1(1), pp. 1-52.

Zilch, A. (1954a). Onychophoren aus El Salvador. Senekenbergiana Biol. 35: 147-150.

Zilch, A. (1954b). Ein neuer Oroperipatus aus Peru, (Onychophora). Senekenbergiana Biol. 35: 151-154.