Axius Leach, 1815

Poore, Gary C. B. & Collins, David J., 2009, Australian Axiidae (Crustacea: Decapoda: Axiidea), Memoirs of Museum Victoria 66 (2), pp. 221-287 : 242-244

publication ID	https://doi.org/10.24199/j.mmv.2009.66.20
DOI	https://doi.org/10.5281/zenodo.12208861
persistent identifier	https://treatment.plazi.org/id/E74287C8-3D7E-8D21-6647-FAB5FE14FE32
treatment provided by	Felipe (2024-06-21 16:54:11, last updated 2024-06-21 18:36:05)
scientific name	Axius Leach, 1815
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Axius Leach, 1815 View in CoL

Axius Leach, 1815: 343 View in CoL .— Sakai and de Saint Laurent, 1989:

26.— Ngoc-Ho, 2003: 447.

Remarks. Axius was diagnosed most recently by Ngoc-Ho (2003). Three species are known, the type species, A. stirhynchus Leach, 1815 , from the eastern North Atlantic ( Ngoc-Ho, 2003) and two from the western North Atlantic, A. serratus Stimpson, 1852 , and A. armatus Smith, 1881 ( Kensley, 2001). Species of Axius are recognised by having a triangular, laterally armed rostrum, undifferentiated supraocular spine, unarmed submedian gastric carina anteriorly flexed towards the midline, uropodal exopod with a transverse suture, pleurobranchs present above pereopods 2–4 and sometimes 5, male pleopod 1 present, and pleopods 2–5 with an appendix interna. We confirmed Ngoc-Ho’s (2003) observation that the male pleopod 1 of A. stirhynchus is simple but with an obsolete suture between two articles and a ridge that hints at an obsolete appendix interna (fig. 14a). Kensley reported for A. serratus the “pleopod 1 in both sexes consisting of single slender setose ramus.” We include Axiopsis (Axiopsis) werribee Poore and Griffin, 1979 (and possibly another species, see below) in this genus, the only ones outside the North Atlantic.

Sakai and de Saint Laurent (1989) listed Axiopsis australiensis as a member of Axius but this species lacks a male pleopod 1 and appendix masculina and possesses more complex gastric armature. It is here redescribed in a new genus, Michelaxiopsis gen. nov.

References

Kensley, B. 2001. Two sympatric species of Axius from the north-west Atlantic (Decapoda, Thalassinidea, Axiidae). Crustaceana 74: 951 - 962.

Leach, W. E. 1815. A tabular view of the external characters of four classes of animals, which Linne arranged under Insecta; with the distribution of the genera composing three of these classes into orders, & c. and descriptions of several new genera and species. Transactions of the Linnean Society of London 11: 306 - 400.

Ngoc-Ho, N. 2003. European and Mediterranean Thalassinidea (Crustacea, Decapoda). Zoosystema 25: 439 - 555.

Poore, G. C. B., and Griffin, D. J. G. 1979. The Thalassinidea (Crustacea: Decapoda) of Australia. Records of the Australian Museum 32: 217 - 321.

Sakai, K., and de Saint Laurent, M. 1989. A check list of Axiidae (Decapoda, Crustacea, Thalassinidea, Anomula), with remarks and in addition descriptions of one new subfamily, eleven new genera and two new species. Naturalists, Publications of Tokushima Biological Laboratory, Shikoku University 3: 1 - 104.

Sakai, K. 1992. Axiid collections of the Zoological Museum, Copenhagen, with the description of one new genus and six new species (Axiidae, Thalassinidea, Crustacea). Zoologica Scripta 21: 157 - 180.

Smith, S. I. 1881. Preliminary notice of the Crustacea dredged, in 64 - 325 fathoms, off the south coast of New England, by the United States Fish Commisssion in 1880. Proceedings of the United States National Museum 3: 413 - 452.

Stimpson, W. 1852. Axius serratus nov. spec. crustaceorum. Proceedings of the Boston Society of Natural History 4: 222 - 223.