Compiler and date details
30 December 1993 - W.W.K. Houston, Australian Biological Resources Study, Canberra, Australian Capital Territory, Australia
The Diplura is a cosmopolitan order of narrow-bodied, primitively wingless, entognathous hexapods. It contains some 800 species in nine families. Species vary in size and form from symphylan-like campodeids ‹5 mm in length, to the dermapteran-like japigid Atlasjapyx atlas Chou & Huang in the subfamily Gigasjapyginae (Chou 1984) and which reaches almost 60 mm in length (Chou & Huang 1986).
Diplura have entognathous mouthparts, moniliform antennae, a pair of cerci and, usually, abdominal styli. Compound eyes and ocelli are absent. The cerci are variously developed and range in form from long, filiform and many-segmented to forceps-like and used for grasping prey. Body colour is generally white to yellowish but the posterior segments of some species, such as those with forceps-like cerci, are heavily sclerotised and pigmented.
The phylogenetic relationships of the Diplura have not been resolved. Kristensen (1991) suggested two entognathan classes: the class Ellipura (= Parainsecta) comprising the orders Protura and Collembola and the class, and order, Diplura. Kukalová-Peck (1991), however, includes the Diplura as entognathans within the Insecta.
Diplura are reported to be represented in the fossil record in the Upper Carboniferous by a species of the genus Testajapyx. Bitsch (1994), however, in a review of the morphological groundplan of the Hexapoda, particularly the Apterygota, considers that this genus should not be attributed to Diplura, but its precise affinities remain to be established.
Paclt (1957) reviewed the world fauna and made major rearrangements of species. His classification, which is almost certainly artificial, has not been adopted entirely by other workers. Further works on the classification of the Diplura are mainly either regional or deal with only sections of the group. They include a monograph on the Campodeidae (Condé 1955a); the Campodeidae of South Africa (Condé 1955b); Campodeidae from caves of New Caledonia (Condé 1980); the Campodeidae of Papua New Guinea (Condé 1982); the Campodeidae of Greece (Condé 1984); the Japygidae of New Zealand (Pagés 1952a); the Parajapyginae of Angola (Pagés 1952b); the Japygidae of South Africa (Pagés 1955); the families and subfamilies of Diplura (Pagés 1959); the Japygoidea of Greece (Pagés 1979); the Japygoidea of North and Central America and the West Indies (Reddell 1983); and the Japygoidea of South America (Reddell 1985).
The Australian fauna is poorly known. There has been little recent work on the fauna and there is clearly a need for extensive collecting and ecological work, and for taxonomic revision. The Diplura section of the Zoological Catalogue of Australia (Houston 1994) was the first comprehensive account of the taxonomic, distributional and biological knowledge of the dipluran fauna of Australia for over 50 years. It provided a baseline and pointed to the many gaps in our knowledge of the fauna. It should also have raised the awareness of the scientific community to the need for a comprehensive taxonomic revision of the Australian Diplura.
Currently five families, Projapygidae, Campodeidae, Japygidae, Heterojapygidae and Parajapygidae are represented. Condé & Pagés (1991) believe that species of the families Anajapygidae and Procampodeidae will be discovered in Australia, but not Dinjapygidae and Evalljapygidae which are known only from the New World. Nine genera and 28 described species have been recorded from Australia but species in existing collections await description and there is little doubt that further collecting will increase significantly the total number of species.
The first native species described from Australia was Japyx longiseta by Silvestri (1908). He subsequently described a further 10 species and one subspecies from Australia (Silvestri 1911, 1928, 1930, 1931, 1947). Other workers were Tillyard (1924), who described one species; Womersley (1934, 1935, 1937, 1939, 1945), who described 14 species and two subspecies; Pagés (1952a), who, in his review of the world fauna was the most recent worker to list all the described species in Australia, renamed one of Womersley's subspecies. A European species, Campodea fragilis, which has been introduced into Australia, was described by Meinert (1865). Condé & Pagés (1991) gave a key to those families found or likely to be found in Australia and summarised the status of our knowledge of the fauna.
Diplura occur mainly in moist environments but they are also known from arid regions. They may be found in the soil, under rocks, in leaf litter, under bark of dead or dying trees and in rotten wood. Cavernicolous species are also known. They may be separated from litter or soil by the use of Berlese funnels, Winkler-Moczarski apparatus or by flotation (e.g. Southwood 1966, Upton 1991).
Van der Drift (1951), in a study of a beech forest in temperate regions in Europe, found the highest densities of campodeids (›100 per square metre) at the base of old litter in the humus/mineral soil layer. In tropical rainforest, campodeids were found to be more common in the litter layer while japygids were more abundant in the soil (Manton 1972). Price & Benham (1977) found japygids usually below a depth of 30 cm and the depth at which most specimens were collected was over 100 cm. Failure to sample deeply enough could account for the apparent rarity of Diplura.
Diplura are generally carnivorous and feed on soil micro-organisms but some species are herbivorous and are thought to feed on plant roots and organic detritus. Their economic significance as pests requires investigation. Zimmerman (1948) reported that Parajapyx isabellae (Grassi), which is known from many parts of the world but not Australia, fed on plant roots and caused damage to the root cortex of sugar cane. Rusek (1982) reported that Octostigma herbivora Rusek (a new genus and species in Projapygoidea, for which he created the new family Octostigmatidae) was collected from injured roots of peanuts and melons in Tonga. The gut of this species was filled with a mass of plant remains, including clearly visible cells and parenchymatous tissue.
Postembryonic development of Dipljapyx humberti (Grassi) was studied in detail by Gyger (1960) and Pagés (1967). Smith (1961) discussed the post embryonic development of Diplura and gave observations on the development of species of Parajapyginae and Evalljapyginae. Townsend (1970) figured an egg cluster of Heterojapyx novaezeelandie and gave brief notes about the adults and their associated cluster.
The external abdominal morphology of all known types of Diplura was studied in considerable detail by Pagés (1989). The skeletal anatomy of Heterojapyx was described by Snodgrass (1952) and the head structure and endognathy in Campodea was investigated by Manton (1964). Martin (1969) studied the anatomy of the cerci of Projapygidae and showed how the secretions from the cercal glands assisted in capturing prey.
Observations on the habits and habitats of Diplura were included in comparative studies of hexapod locomotory mechanisms by Manton (1972). Pagés (1967), in a detailed study of Dipljapyx humberti, provided data on the biology, ecology and behaviour of Japygiodea, while Reddell (1983) briefly summarised the general behaviour of the Japygoidea, with emphasis on the North American fauna. Both works are useful sources of references on the Diplura.
Preparation of this database, a section of the Zoological Catalogue of Australia, was undertaken as part of the author's work within the Zoological Catalogue Section of the Australian Biological Resources Study. The author would like to thank Dr B. Condé of the University of Nancy and Dr J. Pagés, Dijon, France, for comments on the manuscript; Graeme Smith, of Bayer Australia Ltd, for locating type material and providing additional information deposited at the IEA; and the librarians at the CSIRO Black Mountain Library for their help with locating many references.
The information on the Australian Faunal Directory site for the Diplura is derived from the Zoological Catalogue of Australia database compiled on the Platypus software program. It incorporates changes made to the work published on 21 November 1994 as (Houston, W.W.K., 1994).
Distribution data in the Directory is by political and geographic region descriptors and serves as a guide to the distribution of a taxon. For details of a taxon's distribution, the reader should consult the cited references (if any) at genus and species levels.
Australia is defined as including Lord Howe Is., Norfolk Is., Cocos (Keeling) Ils, Christmas Is., Ashmore and Cartier Ils, Macquarie Is., Australian Antarctic Territory, Heard and McDonald Ils, and the waters associated with these land areas of Australian political responsibility. Political areas include the adjacent waters.
Terrestrial geographical terms are based on the drainage systems of continental Australia, while marine terms are self explanatory except as follows: the boundary between the coastal and oceanic zones is the 200 m contour; the Arafura Sea extends from Cape York to 124 DEG E; and the boundary between the Tasman and Coral Seas is considered to be the latitude of Fraser Island, also regarded as the southern terminus of the Great Barrier Reef.
Distribution records, if any, outside of these areas are listed as extralimital. The distribution descriptors for each species are collated to genus level. Users are advised that extralimital distribution for some taxa may not be complete.
Bitsch, J. 1994. The morphological groundplan of Hexapoda: critical review of recent concepts. Annales de la Société Entomologique de France ns 30: 103-129
Chou, I. 1984. Studo de Japigedoj (VI) (Dipluroj: Japigedoj). Entomotaxonomia 6: 55-57
Chou, I. & Huang, F. 1986. Novaj genro kaj specio de la subfamilio Gigasjapyginae. A new genus and species of the subfamily Gigasjapyginae (Diplura: Japygidae). Entomotaxonomia 8: 237-241
Condé, B. 1955a. Matériaux pour une monographie des Diploures Campodéidés. Mémoires du Muséum National d'Histoire Naturelle. Paris (A) Zoologie 12: 1-202
Condé, B. 1955b. Diplura: Campodeidae. pp. 60-73 in Hanström, B., Brinck, P. & Rudebeck, G. (eds). South African Animal Life. Results of the Lund University Expedition in 1950–1951. Stockholm : Almqvist & Wiksel Vol. 2.
Condé, B. 1980. Diploures Campodéidés des grottes de Nouvelle-Calédonie. Revue Suisse de Zoologie 87: 193-200
Condé, B. 1982. Diploures Campodéidés de Papouasie. Revue Suisse de Zoologie 89: 731-748
Condé, B. 1984. Diploures Campodéidés (Insectes) de Grèce (1re note). Revue Suisse de Zoologie 91: 173-201
Condé, B. & Pagés, J. 1991. Diplura. pp. 269-271 in CSIRO (ed.). The Insects of Australia. A textbook for students and research workers. Melbourne : Melbourne University Press Vol. 1 xiii 542 pp.
Drift, J. van der 1951. Analysis of the animal community in a beech forest floor. Tijdschrift voor Entomologie 94: 1-168 + appendix
Houston, W.W.K. 1994. Diplura. 139-156, 157-164 (Appendix & Index) in Houston, W.W.K. (ed.). Zoological Catalogue of Australia. Protura, Collembola, Diplura. Melbourne : CSIRO Australia Vol. 22 188 pp.
Kristensen, N.P. 1991. Phylogeny of extant hexapods. pp. 125-140 in CSIRO (ed.). The Insects of Australia. A textbook for students and research workers. Melbourne : Melbourne University Press Vol. 1 xiii 542 pp.
Kukalová-Peck, J. 1991. Fossil history and the evolution of hexapod structures. pp. 141-179 in CSIRO (ed.). The Insects of Australia. A textbook for students and research workers. Melbourne : Melbourne University Press Vol. 1 xiii 542 pp.
Manton, S.M. 1964. Mandibular mechanisms and the evolution of arthropods. Philosophical Transactions of the Royal Society of London B 247: 1-183
Manton, S.M. 1972. The evolution of arthropodan locomotory mechanisms. Part 10. Locomotory habits, morphology and evolution of the hexapod classes. Journal of the Linnean Society of London, Zoology 51: 203-400
Meinert, F. 1865. Campodeae: en familie af Thysanurernes orden. Naturhistorisk Tidsskrift. Kjøbenhavn 3 3: 400-440
Paclt, J. 1957. Diplura. Genera Insectorum 212: 1-123
Pagés, J. 1952a. Diploures Japygidés de Nouvelle-Zélande. Records of the Canterbury Museum 6: 149-162
Pagés, J. 1952b. Parajapyginae (Insecta, Entotrophi, Japygidae) de l'Angola. Subsídios para o Estudo de Biologia na Lunda 13: 51-95
Pagés, J. 1955. Diplura: Japygidae. pp. 74-82 in Hanström, B., Brinck, P. & Rudebeck, G. (eds). South African Animal Life. Results of the Lund University Expedition in 1950–1951. Stockholm : Almqvist & Wiksell.
Pagés, J. 1959. Remarques sur la classification des Diploures. Travaux du Laboratoire de Zoologie et de la Station Aquicole Grimaldi de la Faculté des Sciences de Dijon 26: 1-25 figs 1-2
Pagés, J. 1989. Sclérites et appendices de l'abdomen des Diploures (Insecta, Apterygota). Archives des Sciences, Genève Soc. Physique Hist. Nat. Genéve 42: 509-551
Price, D.W. & Benham, G.S. Jr 1977. Vertical distribution of soil-inhabiting microarthropods in an agricultural habitat in California. Environmental Entomology 6(4): 575-580
Reddell, J.R. 1983. A checklist and bibliography of the Japygoidea (Insecta: Diplura) of North America, Central America, and the West Indies. Texas Mem. Mus., Pearce-Sellards Series, No. 37. 41 pp.
Reddell, J.R. 1985. A checklist and bibliography of the Iapygoidea (Insecta: Diplura) of South America. Texas Mem. Mus., Pearce-Sellards Series, No. 42. 34 pp.
Rusek, J. 1982. Octostigma herbivora n.gen. & sp. (Diplura: Projapygoidea: Octostigmatidae n.fam.) injuring plant roots in the Tonga Islands. New Zealand Journal of Zoology 9: 25-32
Silvestri, F. 1908. Thysanura. 47-68 pls I-X in Michaelsen, W. & Hartmeyer, R. (eds). Die Fauna Südwest-Australiens. Ergebnisse de Hamburger Südwest-Australischen Forschungsreise 1905. Jena : G. Fischer.
Silvestri, F. 1911. Materiali per lo studio dei Tisanuri. XV. Nova specie di Heterojapyx dell' Australia. Bollettino del Laboratorio di Zoologia Generale e Agraria della Facoltà Agraria in Portici 5: 97-99
Silvestri, F. 1928. Results of Dr E. Mjöberg's Swedish scientific expeditions to Australia 1910–1913. 48. Thysanura: Japygidae. Japyx mjöbergi sp. n. Arkiv för Zoologi 20(9): 1-4
Silvestri, F. 1930. Contribuzione alla conoscenza degli Japygidae (Thysanura) della regione australiana. Bollettino del Laboratorio di Zoologia Generale e Agraria della Facoltà Agraria in Portici 23: 210-226
Silvestri, F. 1931. Nuovi Campodeidae (Insecta, Thysanura) della regione australiana. Bollettino del Laboratorio di Zoologia Generale e Agraria della Facoltà Agraria in Portici 25: 275-285
Silvestri, F. 1947. On some Japygidae in the Museum of Comparative Zoology (Dicellura). Psyche (Cambridge) Camb. 54: 209-229
Smith, L.M. 1961. Japygidae of North America, 8. Postembryonic development of Parajapyginae and Evalljapyginae (Insecta, Diplura). Annals of the Entomological Society of America 54: 437-444
Snodgrass, R.E. 1952. A Textbook of Arthropod Anatomy. Ithaca,. N.Y. : Comstock 363 pp.
Southwood, T.R.E. 1978. Ecological Methods with particular reference to the study of insect populations. London : Chapman & Hall xxiv 524 pp.
Tillyard, R.J. 1924. Primitive wingless insects. Part I: The silverfish, bristletails and their allies (Order Thysanura). New Zealand Journal of Science and Technology 7: 232-242
Townsend, J.I. 1970. Some notes on Heterojapyx novaezeelandiae (Verhoeff) (Diplura: Japygidae). New Zealand Entomologist 4(1969): 100-102
Upton, M.S. 1991. Methods for collecting, preserving, and studying insects and allied forms. Miscellaneous Publications of the Australian Entomological Society 3: 1-86 Fourth Edn
Womersley, H. 1934. On the Australian species of Japygidae. Transactions of the Royal Society of South Australia 58: 37-47
Womersley, H. 1935. A new species of Japyx from Australia. Entomologist's Monthly Magazine 71: 86-87
Womersley, H. 1937. Studies in Australian Thysanura. 3. Campodeidae. Transactions of the Royal Society of South Australia 61: 166-172
Womersley, H. 1939. Diplura. pp. 45-77 in Womersley, H. (ed.). Primitive Insects of South Australia. Silverfish, springtails and their allies. Adelaide : Frank Trigg, Government Printer.
Womersley, H. 1945. New species of Diplura (Insecta, Apterygota) from Australia and New Guinea. Transactions of the Royal Society of South Australia 69: 223-228
Zimmerman, E.C. 1948. Order Diplura Börner, 1904. pp. 38–42 in, Insects of Hawaii. A manual of the Insects of the Hawaiian Islands, including an enumeration of the species and notes on their origin, distribution, hosts, parasites, etc. Honolulu : University of Hawaii Press Vol. 2 Apterygota to Thysanoptera.
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