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WoRMS taxon detailsAustralocyclops australis (Sars G.O., 1896)
357379 (urn:lsid:marinespecies.org:taxname:357379)
accepted
Species
Microcyclops sydneyensis (Schmeil, 1898) · unaccepted > junior subjective synonym
Not documented
Walter, T.C.; Boxshall, G. (2024). World of Copepods Database. Australocyclops australis (Sars G.O., 1896). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=357379 on 2024-07-26
Date action by
basis of record
Sars, G.O. (1896). On freshwater Entomostraca from the neighbourhood of Sydney, partly raised from dried mud. <em>Archiv for Mathematik for Naturvidenskab Kristiania.</em> 18 (3):1-81, 8 plates. [details]
 additional source Dussart, B.H. & D. Defaye. (2001). Copepoda: Introduction to the Copepoda. (2nd edition)(revised and enlarged). <em>Guides to the Identification of the Microinvertebrates of the Continental Waters of the World. H.J.F. Dumont (ed.). SPB Academic Publishers, The Hague.</em> 16:1-344. [details] Available for editors  [request] additional source King, R.L. (1855). On Australian entomostracans. <em>Papers and Proceedings of the Royal Society of Tasmania.</em> 3(1):56-75. [details] source of synonymy Morton, D.W. (1985). Revision of the Australian Cyclopidae (Copepoda: Cyclopoida). I. Acanthocyclops Kiefer, Diacyclops Kiefer and Australocyclops, gen. nov. Australian Journal of Marine and Freshwater Research 36(4):615-634, figs. 1-7. [details] Available for editors [request] From editor or global species database
Introduced species population trend As thus defined, the genus is distinguished from the closely related genera Acanthocyclops and Microcyclops by the following combination of characters-P5 one-segmented, P1 with both rami two-segmented, those of P2-4 three-segmented, P4Rel without an inner seta.The only species of Australocyclops hitherto known, A. australis (Sars),has been assigned both to Microcyclops (Kiefer 1929) and to Acanthocyclops (Rylov 1948), thereby creating problems in both genera. Inclusion of Australocyclops australis in Microcyclops destroys the homogeneity of that genus, all other species of which have two-segmented rami in all swimming legs. On the other hand, to place the species in Acanthocyclops is equally objectionable because of the one-segmented nature of P5 in Australocyclops australis. Moreover, the articulation pattern of the swimming legs of A. australis is not found in any species of Acanthocyclops. It may be argued that the single segment of P5 in Australocyclops australis is very similar to the distal segment of P5 in some species of Acanthocyclops, thus suggesting an intimate relationship between this species and that genus (assuming that P5 in Australocyclops is the result of fusion of the proximal segment with the first urosomal somite). However, the structure of the corresponding segment in the two new species included in Australocyclops is of the type found in Microcyclops varicans and related species, a structure not otherwise seen in Acanthocyclops. In any case, the permanent loss of a segment of a leg, particularly a leg of such taxonomic importance as P5, is a reduction so profound that it must be considered of generic importance. Gurney's (1933) definition of Acanthocyclops is very broad and easily includes the three species here assigned to Australocyclops even though they are included more by means of his exceptions to the criteria he proposed than by the criteria themselves. These species, however, are considered sufficiently distinct, although morphologically homogeneous amongst themselves, to warrant the erection of the new genus. [details] |
