Diversity and distribution of cave crickets in the genus Micropathus Walker, 1869, threatened short-range endemics from Tasmanian wet forest (Orthoptera: Rhaphidophoridae)
Abstract
Rhaphidophoridae, also called cave crickets, is a globally distributed insect group belonging to the katydids and allies (Orthoptera: Ensifera: Tettigoniidea). Rhaphidophorids are restricted to humid microhabitats such as caves and wet forests, but the group’s true diversity is poorly known. In Australia, 27 species are described from nine genera in the subfamily Macropathinae, with the highest diversity concentrated in the mesic island state of Tasmania. Micropathus Richards, 1964 is the most widespread genus on the island and contains five species largely restricted to subterranean habitats. Micropathus is reliant on pockets of relictual wet forest, placing species at risk of decline due to climate and land use change, and one species is listed as Critically Endangered. A recent molecular phylogeny for Macropathinae identified two additional, putatively undescribed species of Micropathus, neither of which can be adequately conserved without formal scientific names. Integrating morphological evidence alongside this phylogenetic framework, we describe Micropathus ditto Beasley-Hall sp. nov., previously thought to be a subpopulation of Micropathus tasmaniensis, and Micropathus zubat Beasley-Hall sp. nov., currently known only from the remote Forest Hills karst system. We also provide a key to Micropathus and redescribe its existing members to better reflect intraspecific morphological variation in the genus.
A correction has been published: Beasley-Hall P.G. & Eberhard S.M. 2025. Diversity and distribution of cave crickets in the genus Micropathus Walker, 1869, threatened short-range endemics from Tasmanian wet forest (Orthoptera: Rhaphidophoridae) — Corrigendum. European Journal of Taxonomy 1022: 288–291. https://doi.org/10.5852/ejt.2025.1022.3095
References
Allegrucci G. & Sbordoni V. 2019. Insights into the molecular phylogeny of Rhaphidophoridae, an ancient, worldwide lineage of Orthoptera. Molecular Phylogenetics and Evolution 138: 126–138. https://doi.org/10.1016/j.ympev.2019.05.032
Allegrucci G., Trewick S.A., Fortunato A., Carchini G. & Sbordoni V. 2010. Cave crickets and cave weta (Orthoptera, Rhaphidophoridae) from the southern end of the World: a molecular phylogeny test of biogeographical hypotheses. Journal of Orthoptera Research 19 (1): 121–130.
Beasley-Hall P.G., Tierney S.M., Weinstein P. & Austin A.D. 2018. A revised phylogeny of macropathine cave crickets (Orthoptera: Rhaphidophoridae) uncovers a paraphyletic Australian fauna. Molecular Phylogenetics and Evolution 126: 153–161. https://doi.org/10.1016/j.ympev.2018.04.024
Beasley-Hall P.G., Trewick S.A., Eberhard S.M., Zwick A., Reed E.H., Cooper S.J.B. & Austin A.D. 2025a. Molecular phylogenetics illuminates the evolutionary history and hidden diversity of Australian cave crickets (Orthoptera: Rhaphidophoridae). bioRxiv: 2024.08.11.607522. https://doi.org/10.1101/2024.08.11.607522
Beasley-Hall P.G., Trewick S.A., Hedges B.A., Cooper S.J.B., Reed E.H. & Austin A.D. 2025b. Integrative taxonomic revision of the Australian cave cricket Speleotettix Chopard, 1944 (Orthoptera: Rhaphidophoridae): New species, distribution and conservation implications. Austral Entomolgy 64 (3): e70011. https://doi.org/10.1111/aen.70011
Chopard L. 1944. Description de deux Sténopelmatides cavernicoles d’Australie [Orth. Gryllacridae]. Bulletin de la Société entomologique de France 49 (4): 52–55. https://doi.org/10.3406/bsef.1944.15753
Clarke A.K. 2006. Cavernicole Diversity and Ecology in Tasmania. University of Tasmania.
Driessen M.M. 2009. Baseline Monitoring of the Tasmanian Glow-Worm and Other Cave Fauna: Exit Cave and Mystery Creek Cave – Tasmania. Parks and Wildlife Service, Tasmania.
Eberhard S.M. 1992. The Invertebrate Cave Fauna of Tasmania: Ecology and Conservation Biology. MSc thesis, University of Tasmania.
Eberhard S.M. 1999. Cave Fauna Management and Monitoring at Ida Bay, Tasmania. Parks and Wildlife Service, Tasmania.
Eberhard S.M. 2001. Cave fauna monitoring and management at Ida Bay, Tasmania. Records of the Western Australian Museum, Supplement 64 (1): 97. https://doi.org/10.18195/issn.0313-122x.64.2001.097-104
Fitness J., Morgan-Richards M., Hegg D. & Trewick S.A. 2018. Reinstatement of the New Zealand cave wētā genus Miotopus Hutton (Orthoptera: Rhaphidophoridae) and description of a new species. European Journal of Taxonomy (468). https://doi.org/10.5852/ejt.2018.468
Guzik M.T., Stringer D.N., Murphy N.P., Cooper S.J.B., Taiti S., King R.A., Humphreys W.F. & Austin A.D. 2019. Molecular phylogenetic analysis of Australian arid-zone oniscidean isopods (Crustacea: Haloniscus) reveals strong regional endemicity and new putative species. Invertebrate Systematics 33 (3): 556–574. https://doi.org/10.1071/IS15010
Harvey M.S. 2002. Short-range endemism amongst the Australian fauna: some examples from non-marine environments. Invertebrate Systematics 16 (4): 555–570. https://doi.org/10.1071/is02009
Iannello S. & Beasley-Hall P.G. 2024. Systematics and biology of Eburnocauda gen. nov., a cave cricket from Australian granite pseudokarst (Orthoptera: Rhaphidophoridae). Australian Journal of Taxonomy 73: 1–9.
ICZN 1999. International Code of Zoological Nomenclature. 4th Edition. The International Trust for Zoological Nomenclature. London, UK. Available from http://iczn.org [accessed July 2025].
Karny H.H. 1930. Phylogenetische und tiergeographische Erwägungen zur Systematik der Rhaphidophorinen. (Orth. Fam. Gryllacridae). Archiv für klassifikatorische und phylogenetische Entomologie 1 (2): 57–76.
Kevan D.K.M.E. 1982. Orthoptera. In: Synopsis and Classification of Living Organisms: 352–379. McGraw-Hill, New York.
Lavoie K. & Poulson T. 2007. The biology and ecology of North American cave crickets. Journal of Cave and Karst Studies 69 (1): 114–134.
Linnaeus C. 1758. Systema Naturae per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis. Salvus, Holmiae [Stockholm]. https://doi.org/10.5962/bhl.title.542
Merritt D.J. & Clarke A.K. 2011. Synchronized circadian bioluminescence in cave-dwelling Arachnocampa tasmaniensis (Glowworms). Journal of Biological Rhythms 26 (1): 34–43. https://doi.org/10.1177/0748730410391947
Olivier G.A. 1789. Histoire Naturelle. Insectes. In: Parker S.P. (ed.) Encyclopédie Méthodique. Histoire Naturelle. Entomologie, ou Histoire Naturelle des Crustacés, des Arachnides et des Insectes. Paris, France.
Richards A.M. 1964. The Rhaphidophoridae (Orthoptera) of Australia, 1: Tasmania. Pacific Insects 6 (1): 217–223.
Richards A.M. 1966. The Rhaphidophoridae (Orthoptera) of Australia. Part 3. A new genus from south-eastern Australia. Pacific Insects 8 (3): 617–628.
Richards A.M. 1967. Notes on the biology of two species of Rhaphidophoridae (Orthoptera) in Tasmania. Proceedings of the Linnean Society of New South Wales 92 (3): 273–278.
Richards A.M. 1968. The Rhaphidophoridae (Orthoptera) of Australia. Part 6. Two new species from northern Tasmania. Pacific Insects 10 (1): 167–176.
Richards A.M. 1970. The distribution and possible origins of Tasmanian cave crickets. Proceedings of the 8th National Conference of the Australian Speleological Federation: 85–87.
Richards A.M. 1971a. The Rhaphidophoridae (Orthoptera) of Australia. Part 10. A new genus from southeastern Tasmania with New Zealand affinities. Pacific Insects 13 (3–4): 589–595.
Richards A.M. 1971b. The Rhaphidophoridae (Orthoptera) of Australia. Part 9. The distribution and possible origins of Tasmanian Rhaphidophoridae, with descriptions of two new species. Pacific Insects 13 (3–4): 575–587.
Richards A.M. 1974. The Rhaphidophoridae (Orthoptera) of Australia. Part 11. New species from the Bass Strait Islands and Tasmania. Pacific Insects 16 (2–3): 245–260.
Richards A.M. 1987. Distribution and relationships of the Australian Rhaphidophoridae (Orthoptera): pointers to past climatic changes. In: Baccetti B.M. (ed.) Evolutionary Biology of Orthopteroid Insects: 438–449. Halsted Press, Chichester, West Sussex.
Richards A.M. & Ollier C.D. 1976. Investigation and Report on the Ecological Protection of Exit Cave Near Ida Bay in Tasmania. Unisearch Ltd, Sydney, Australia.
Richardson A., Mesibov R., Forster L., Grove S., Greenslade P., Florentine S., Bashford R., McQuillan P., Bonham K. & Driessen M. 2013. The Distributions of Invertebrate Species Along the Warra-Mount Weld Altitudinal Transect in 2001–2002 and Identification of Taxa Restricted by Altitude. Department of Primary Industries, Parks, Water and Environment, Hobart.
Stritih N. & Čokl A. 2012. Mating behaviour and vibratory signalling in non-hearing cave crickets reflect primitive communication of Ensifera. PLoS ONE 7 (10): e47646. https://doi.org/10.1371/journal.pone.0047646
Threatened Species Section 2022. Southern Sandstone Cave Cricket (Micropathus kiernani): Species Management Profile for Tasmania’s Threatened Species Link. Department of Natural Resources & Environment Tasmania. Available from https://www.threatenedspecieslink.tas.gov.au/pages/southern-sandstone-cave-cricket.aspx [accessed 29 Jul. 2025].
Trewick S.A. 2024. Two new genera of tokoriro (Orthoptera: Rhaphidophoridae: Macropathinae) from Aotearoa New Zealand. Zootaxa 5481 (5): 531–546. https://doi.org/10.11646/zootaxa.5481.5.3
Walker F. 1869. Catalogue of the Specimens of Dermaptera Saltatoria in the Collection of the British Museum. E. Newman, printer, Devonshire Street, Bishopsgate, London.
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