Abstract
Integrated molecular and morphological studies of newly collected and curated specimens of the genus Caridina from the Atherton Tablelands, Wet Tropics World Heritage Area in north–eastern Queensland, Australia indicated the presence of an undescribed species belonging to the Caridina zebra Short 1993 complex. This species is somewhat intermediate, although distinct on the basis of molecular data and morphology, from two known sympatric species, Caridina zebra and C. confusa Choy & Marshall 1997, and an allopatric species, C. spinula Choy & Marshall 1997, from the Cape York Peninsula, about 500 km north. It is described here as a new species, C. malanda sp. nov., and compared with similar congeners. A key for the identification of the species, as well as notes on its distribution, ecology, and conservation, are provided.
References
Choy, S. & Marshall, J. (1997) Two new species of freshwater atyid shrimps (Crustacea: Decapoda: Atyidae) from northern Queensland and the distributional ecology of the Caridina typus species-group in Australia. Memoirs of the Queensland Museum, 41, 25–36.
Costa, F.O., deWaard, J.R., Boutillier, J., Ratnasingham, S., Dooh, R.T., Hajibabaei, M. & Hebert, P.D.N. (2007) Biological identifications through DNA barcodes, the case of Crustacea. Canadian Journal of Fisheries and Aquatic Sciences, 64, 272–295.
https://doi.org/10.1139/f07-008
De Grave, S., Smith, K.G., Adeler, N.A., Allen, D.J., Alvarez, F., Anker, A., Cai, Y., Carrizo, S.F., Klotz, W., Mantelatto, F., Page, T.J., Shy, J.Y., Villalobos, J.L. & Wowor, D. (2015) Dead Shrimp Blues: A global assessment of extinction risk in freshwater shrimp (Crustacea: Decapoda: Caridea). PLoS ONE, 10, e0120198.
https://doi.org/10.1371/journal.pone.0120198
de Mazancourt, V., Klotz, W., Marquet, G. & Keith, P. (2018) Integrative taxonomy helps separate four species of freshwater shrimps commonly overlooked as Caridina longirostris (Crustacea: Decapoda: Atyidae) on Indo-West Pacific islands. Invertebrate Systematics, 32, 1422–1447.
https://doi.org/10.1071/IS18034
de Mazancourt, V., Klotz, W., Marquet, G., Mos, B., Rogers, D.C. & Keith, P. (2019) The complex study of complexes: the first well-supported phylogeny of two species complexes within genus Caridina (Decapoda: Caridea: Atyidae) sheds light on evolution, biogeography, and habitat. Molecular Phylogenetics and Evolution, 131, 164–180.
https://doi.org/10.1016/j.ympev.2018.11.002
de Mazancourt, V., Marquet, G. & Keith, P. (2017) The “Pinocchio-shrimp effect”: first evidence of variation in rostrum length with the environment in Caridina H. Milne-Edwards, 1837 (Decapoda: Caridea: Atyidae). Journal of Crustacean Biology, 37, 249–257.
https://doi.org/10.1093/jcbiol/rux025
Huelsenbeck, J.P. & Ronquist, F. (2001) MRBAYES: Bayesian inference of phylogenetic trees. Bioinformatics, 17, 754–755.
https://doi.org/10.1093/bioinformatics/17.8.754
Hughes, J.M., Bunn, S.E., Hurwood, D.A., Choy, S. & Pearson, R.G. (1996) Genetic differentiation among populations of Caridina zebra (Decapoda: Atyidae) in tropical rainforest streams, northern Australia. Freshwater Biology, 36, 289–296.
https://doi.org/10.1046/j.1365-2427.1996.00089.x
Hurwood, D.A. & Hughes, J.M. (2001). Nested clade analysis of the freshwater shrimp, Caridina zebra (Decapoda: Atyidae), from north-eastern Australia. Molecular Ecology, 10, 113–125.
https://doi.org/10.1046/j.1365-294X.2001.01175.x
Matzen da Silva, J., Creer, S., dos Santos, A., Costa, A.C., Cunha, M.R., Costa, F.O. & Carvalho, G.R. (2011) Systematic and evolutionary insights derived from mtDNA COI barcode diversity in the Decapoda (Crustacea: Malacostraca). PLoS ONE, 6, e19449.
https://doi.org/10.1371/journal.pone.0019449
Milne Edwards, H. (1837) Histoire naturelle des Crustacès, comprenant l’anatomie, la physiologie et la classification de ces animaux 2, 1–532, Atlas pp. 1–532., pls. 1–42.
Page, T.J., Choy, S.C. & Hughes, J. (2005) The taxonomic feedback loop: symbiosis of morphology and molecules. Biology Letters, 1, 139–142.
https://doi.org/10.1098/rsbl.2005.0298
Page, T.J. & Hughes, J.M. (2014) Contrasting insights provided by single and multi-species data in a regional comparative phylogeographic study. Biological Journal of the Linnean Society, 111, 554–569.
https://doi.org/10.1111/bij.12231
Page, T.J., Von Rintelen, K. & Hughes, J.M. (2007) An island in the stream: Australia’s place in the cosmopolitan world of Indo-West Pacific freshwater shrimp (Decapoda: Atyidae: Caridina). Molecular Phylogenetics and Evolution, 43, 645–659.
https://doi.org/10.1016/j.ympev.2006.08.007
Purushothaman, P., Chakraborty, R.D., Ganesan, K. & Maheswarudu, G. (2019) Integrative taxonomy of commercially important deep water penaeoid shrimps from India. Journal of Genetics, 98, 1–13.
https://doi.org/10.1007/s12041-018-1052-3
Queensland Government (2019) Malanda – Population Centre. Available from: www.dnrm.qld.gov.au/qld/environment/land/place-names/search#/search=Malanda&types=0&place=Malanda20684 (accessed 20 April 2019)
Short, J.W. (1993) Caridina zebra, a new species of freshwater atyid shrimp (Crustacea: Decapoda) from northeastern Queensland rainforest. Memoirs of the Queensland Museum, 34, 61–67.
Tamura, K., Stecher, G., Peterson, D., Filipski, A. & Kumar, S. (2013) MEGA6: Molecular Evolutionary Genetics Analysis version 6.0. Molecular Biology and Evolution, 30, 2725–2729.
https://doi.org/10.1093/molbev/mst197
Yasser, A.G., Sheldon, F. & Hughes, J.M. (2018) Spatial distributions and environmental relationships of two species complexes of freshwater atyid shrimps. Ecosphere, 9, e02388.
https://doi.org/10.1002/ecs2.2388