A new family of Asellota (Crustacea, Isopoda) from the deep sea of Zealandia
Abstract
A new family-level taxon of deep-sea isopods, Basoniscus hikurangi gen. et sp. nov., was recovered from the Hikurangi Plateau in the deep sea off eastern New Zealand. The broad-bodied, eyeless, seemingly unremarkable isopod was unusual in its possession of features that characterize two different families: the shallow water Joeropsididae Nordenstam, 1933 and the deep-sea Haploniscidae Hansen, 1916. An analysis of superfamily Janiroidea G.O. Sars, 1897 was conducted to establish the affinities of the species. Multiple analyses were done using unweighted and implied weighted characters. Existing families were well supported, with B. hikurangi intermediate between Joeropsididae and Haploniscidae. The new species, however, cannot be placed in either family owing to its lack of important defining synapomorphies of each family. As a result, Basoniscidae fam. nov. was created to contain this new species. That rocky hard substrates are undersampled is another implication. Our understanding of deep-sea species richness will not be accurate until more efforts are made to survey these habitats, especially more sites in the southern hemisphere. These gaps in our knowledge of the deep sea impairs any general claims about the distribution of biodiversity on a global scale. This find demonstrates that museums hold underused but valuable resources for understanding and describing the biodiversity of the deep sea.
References
Cunha M.R. & Wilson G.D.F. 2006. The North Atlantic genus Heteromesus (Crustacea: Isopoda: Asellota: Ischnomesidae). Zootaxa 1192: 3–76.
Dallwitz M.J. 1980. A general system for coding taxonomic descriptions. TAXON 29: 41–46. https://doi.org/10.2307/1219595
Dallwitz M.J., Paine T.A. & Zurcher E.J. 2000. User’s guide to the DELTA system: a general system for processing taxonomic descriptions, edition 4.12, version 22 August 2020. CSIRO, Canberra. Available from https://www.delta-intkey.com/www/uguide.pdf [accessed 17 Jul. 2022].
Davy B., Hoernle K. & Werner R.F. 2008. Hikurangi Plateau: Crustal structure, rifted formation, and Gondwana subduction history. Geochemistry, Geophysics, Geosystems 9 (7): 1–31. https://doi.org/10.1029/2007GC001855
Goloboff P.A. 1993. Estimating character weights during tree search. Cladistics 9 (1): 83–91. https://doi.org/10.1111/j.1096-0031.1993.tb00209.x
Goloboff P.A. 1997. Self-Weighted Optimization: Tree searches and character state reconstructions under implied transformation costs. Cladistics 13 (3): 225–245. https://doi.org/10.1111/j.1096-0031.1997.tb00317.x
Goloboff P.A. & Catalano S.A. 2016. TNT version 1.5, including a full implementation of phylogenetic morphometrics. Cladistics 32 (3): 221–238. https://doi.org/10.1111/cla.12160
Goloboff P.A., Farris J.S., Källersjö M., Oxelman B., Ramírez M.J. & Szumik C.A. 2003. Improvements to resampling measures of group support. Cladistics 19 (4): 324–332. https://doi.org/10.1111/j.1096-0031.2003.tb00376.x
Goloboff P.A., Carpenter J.M., Arias J.S. & Esquivel D.R.M. 2008. Weighting against homoplasy improves phylogenetic analysis of morphological data sets. Cladistics 24 (5): 758–773. https://doi.org/10.1111/j.1096-0031.2008.00209.x
Gudmundsson G., von Schmalensee M. & Svavarsson J. 2000. Are foraminifers (Protozoa) important food for small isopods (Crustacea) in the deep sea? Deep-Sea Research Part I: Oceanographic Research Papers 47: 2093–2109. https://doi.org/10.1016/S0967-0637(00)00013-3
Hessler R.R. 1970. The Desmosomatidae (Isopoda, Asellota) of the Gay Head-Bermuda Transect. Bulletin of the Scripps Institution of Oceanography 15: 1–185.
Hoernle K., Mortimer N., Werner R. & Hauff F. 2003. FS/RV SONNE Fahrtbericht SO 168 = Cruise Report SO168, ZEALANDIA : Causes and Effects of Plume and Rift-Related Cretaceous and Cenozoic Volcanism on Zealandia; Wellington - Sydney - Lyttleton/Christchurch; December 03, 2002 - January 16, 2003. Report 113: 205. GEOMAR, Kiel, Germany. https://doi.org/10.3289/GEOMAR_REP_113_2003
Just J. 2001. Bathyal Joeropsididae (Isopoda: Asellota) from south-eastern Australia, with description of two new genera. Memoirs of the Victorian Museum 58 (2): 297–334. https://doi.org/10.24199/j.mmv.2001.58.16
Just J. 2009. Triaina, a new genus in the Janirellidae Menzies, 1956 (Crustacea: Isopoda: Asellota), with two new species from south-eastern Australia, and a new diagnosis for the family. Zootaxa 1980 (1): 1–15. https://doi.org/10.11646/zootaxa.1980.1.1
Just J. & Wilson G.D.F. 2004. Revision of the Paramunna complex (Isopoda : Asellota : Paramunnidae). Invertebrate Systematics 18 (4): 377–466. https://doi.org/10.1071/IS03027
Lewis K.B., Collot J.-Y. & Lallem S.E. 1998. The dammed Hikurangi Trough: a channel-fed trench blocked by subducting seamounts and their wake avalanches (New Zealand–France GeodyNZ Project). Basin Research 10 (4): 441–468. https://doi.org/10.1046/j.1365-2117.1998.00080.x
Lincoln R.J. 1985. The Marine Fauna of New Zealand: Deep-Sea Isopoda Asellota, Family Haploniscidae. New Zealand Oceanographic Institute, Wellington. Available from https://docs.niwa.co.nz/library/public/Memoir 094_Marine Fauna of NZ_Deep Sea Isopoda Asellota - 1985.pdf [accessed 28 Mar. 2023].
Luyendyk B.P. 1995. Hypothesis for Cretaceous rifting of east Gondwana caused by subducted slab capture. Geology 23 (4): 373–376. https://doi.org/10.1130/0091-7613(1995)023<0373:hfcroe>2.3.co;2
Maddison W.P. & Maddison D.R. 2021. Mesquite: a Modular System for Evolutionary Analysis, ver. 3.7. Available from http://www.mesquiteproject.org [accessed Jan. 30 2022].
Maddison D., Swofford D.L. & Maddison W. 1998. Nexus: an extensible file format for systematic information. Systematic Biology 46 (4): 590–621. https://doi.org/10.1093/sysbio/46.4.590
Poore G.C.B. & Wilson G.D.F. 1993. Marine species richness. Nature 361: 597–598. https://doi.org/10.1038/361597a0
Rex M.A., Stuart C.T., Hessler R.R., Allen J.A., Sanders H.L. & Wilson G.D.F. 1993. Global-scale latitudinal patterns of species diversity in the deep-sea benthos. Nature 365: 636–639. https://doi.org/10.1038/365636a0
Riehl T., Wilson G.D.F. & Malyutina M.V. 2014. Urstylidae – a new family of abyssal isopods (Crustacea: Asellota) and its phylogenetic implications. Zoological Journal of the Linnean Society 170 (2): 245–296. https://doi.org/10.1111/zoj.12104
Sanders H.L., Hessler R.R. & Hampson G.R. 1965. An introduction to the study of deep-sea benthic faunal assemblages along the Gay Head-Bermuda transect. Deep-Sea Research and Oceanographic Abstracts 12 (6): 845–867. https://doi.org/10.1016/0011-7471(65)90808-9
Schram F.R. 1970. Isopod from the Pennsylvanian of Illinois. Science 169: 854–855. https://doi.org/10.1126/science.169.3948.854
Selden P.A., Wilson G.D.F., Simonetto L. & Dalla Vecchia F.M. 2016. First fossil asellote (Isopoda: Asellota), from the Upper Triassic (Norian) of the Carnic Prealps (Friuli, northeastern Italy). Journal of Crustacean Biology 36 (1): 68–86. https://doi.org/10.1163/1937240X-00002387
Stuart C.T., Martinez Arbizu P., Smith C.R., Molodtsova T., Brandt A., Etter R.J., Escobar-Briones E., Fabri M.C. & Rex M.A. 2008. CeDAMar global database of abyssal biological sampling. Aquatic Biology 4 (2): 143–145. https://doi.org/10.3354/ab00097
Wilson G.D.F. 1987. The road to the Janiroidea: Comparative morphology and evolution of the asellote isopod crustaceans. Zeitschrift fuer Zoologische Systematik und Evolutionsforschung 25 (4): 257–280. https://doi.org/10.1111/j.1439-0469.1987.tb00608.x
Wilson G.D.F. 1989. A Systematic Revision of the Deep-Sea Subfamily Lipomerinae of the Isopod Crustacean Family Munnopsidae. UC San Diego: Scripps Institution of Oceanography. Available from https://escholarship.org/uc/item/5nm8z7td [accessed 24 Dec. 2023].
Wilson G.D.F. 1991. Functional morphology and evolution of isopod genitalia. In: R.T. Bauer & Martin J.W. (eds) Crustacean Sexual Biology: 228–245. Columbia University Press, New York/Oxford. https://doi.org/10.7312/baue90796-014
Wilson G.D.F. 1994. A phylogenetic analysis of the isopod family Janiridae (Crustacea). Invertebrate Taxonomy 8 (3): 749–766. https://doi.org/10.1071/IT9940749
Wilson G.D.F. 1998. Historical influences on deep-sea isopod diversity in the Atlantic Ocean. Deep-Sea Research Part II: Topical Studies in Oceanography 45 (1–3): 279–301. https://doi.org/10.1016/S0967-0645(97)00046-5
Wilson G.D.F. 1999. Some of the deep-sea fauna is ancient. Crustaceana 72 (8): 1020–1030. https://doi.org/10.1163/156854099503915
Wilson G.D.F. 2009. The phylogenetic position of the Isopoda in the Peracarida (Crustacea: Malacostraca). Arthropod Systematics & Phylogeny 67 (2): 159–198. https://doi.org/10.3897/asp.67.e31696
Wilson G.D.F. & Ahyong S.T. 2015. Life styles of the species-rich and fabulous: the deep-sea crustaceans. In: Thiel M. & Watling L. (eds) The Natural History of the Crustacea, Vol. 2: Lifestyles and Feeding Biology: 279–298. Oxford University Press, New York, USA.
Wilson G.D.F. & Wägele J.-W. 1994. A systematic review of the family Janiridae (Crustacea: Isopoda: Asellota). Invertebrate Taxonomy 8 (3): 683–747. https://doi.org/10.1071/IT9940683
Wolff T. 1962. The Systematics and Biology of Bathyal and Abyssal Isopoda Asellota. Danish Science Press, LTD, Copenhagen. Available from https://digit.snm.ku.dk/Documentsonline/GalatheaReports/galathea-vol.06-pp_001-016.pdf [accessed 28 March 2023]
Wood R. & Davy B. 1994. The Hikurangi Plateau. Marine Geology 118 (1): 153–173. https://doi.org/10.1016/0025-3227(94)90118-X
Zemko K. & Kaiser S. 2012. Thambema thunderstruckae sp. n., the first record of Thambematidae (Isopoda: Asellota) from the Southern Hemisphere shelf. Polish Polar Research 33 (2): 163–179.
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