Euonyx Norman, 1867
publication ID |
https://doi.org/ 10.11646/zootaxa.3867.1.1 |
publication LSID |
lsid:zoobank.org:pub:B7C6EC5F-5AA3-43B1-BD3D-D8111E0EC3A7 |
DOI |
https://doi.org/10.5281/zenodo.6646934 |
persistent identifier |
https://treatment.plazi.org/id/03AE8B60-AC17-FFC9-6CC1-FCFEFA28C485 |
treatment provided by |
Felipe (2021-06-11 20:53:46, last updated 2024-11-29 10:29:20) |
scientific name |
Euonyx Norman, 1867 |
status |
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Euonyx Norman, 1867 View in CoL
( Fig. 9 View FIGURE 9 )
Euonyx Norman, 1867: 202 View in CoL .— Sars, 1891: 116.— Stebbing, 1906: 19 (in part). Pirlot, 1936: 116 (in part).—J.L. Barnard, 1969: 342 (in part).— Lincoln, 1979: 54 (in part).— Lowry & Stoddart, 1989: 519.— Barnard & Karaman, 1991: 485, fig. 92I (in part).
Leptochela Boeck, 1876: 190 (homonym, Decapoda View in CoL ) (type species, Opis leptochela Bate & Westwood, 1868 , monotypy.
Type species. Euonyx chelatus Norman, 1867 View in CoL , monotypy.
Included species. Euonyx View in CoL includes four species: E. chelatus Norman, 1867 View in CoL ; E. coecus Pirlot, 1933 View in CoL E. urania View in CoL sp. nov.; E. xarifa View in CoL sp. nov.
Incertae sedis. Euonyx conicurus K.H. Barnard, 1955 View in CoL (genus uncertain);
Diagnostic description. Antenna 1 peduncle article 1 without anterodistal lobe; accessory flagellum with an elongate article 1 (at least twice as long as article 2) partially covering callynophore. Antenna 2 without brush setae. Mandible molar a large, asetose flap or absent. Maxilla 1 outer plate with reduced seta-teeth in a modified 7/4 crown. Maxilla 2 inner plate subequal to or significantly shorter than outer plate. Gnathopod 1 chelate; coxa 1 reduced, significantly shorter than coxa 2, tapering distally or subquadrate; ischium long (length 2 × to 4 × breadth) too very long (length 4 × to 6 × breadth); carpus long (length 2 to 4 × breadth); propodus margins subparallel. Uropod 2 inner ramus not constricted. Telson deeply cleft .
Remarks. Euonyx appears to be the immediate sister taxon of Stephonyx Lowry & Stoddart, 1989 . Euonyx has abandoned the scavenging life-style to become an ectoparasite of echinoids and in the process developed severely reduced mouthparts, particularly the seta-teeth of the maxilla 1 outer plate.
In Euonyx coecus Pirlot, 1933 the setal-teeth of maxilla 1 appear to be intermediate between Euonyx and Stephonyx , but the mandibular molar is absent, an important characteristic of Euonyx .
Distribution. North Atlantic Ocean. Indonesia. Eastern Australia.
Key to Euonyx species
1. Antenna 1 peduncular article 1 without anterodistal lobe................................................ E. xarifa View in CoL - Antenna 1 pedunculararticle 1 withsmalltolargeanterodistallobe ............................................ 2 2. Gnathopod 1 carpus longer than propodus........................................................... E. urania View in CoL - Gnathopod 1 carpusshorterthanorsubequaltopropodus .................................................... 3 3. Urosomite 1 dorsal margin a broad angled wedge................................................... E. chelatus View in CoL - Urosomite 1 dorsalmarginanacutetriangularprocess .........................................? Euonyxconicurus View in CoL - Urosomite 1 dorsalmarginaroundedboss ..................................................... Euonyxcoecus View in CoL
Barnard, K. H. (1955) Additions to the fauna-list of South African Crustacea and Pycnogonida. Annals of the South African Museum, 43, 1 - 107.
Barnard, J. L. (1969) The families and genera of marine gammaridean Amphipoda. Bulletin of the United States National Museum, 271, 1 - 535. http: // dx. doi. org / 10.1163 / 156854082 x 00632
Barnard, J. L. & Karaman, G. S. (1991) The families and genera of marine gammaridean Amphipoda (except marine gammaroids). Records of the Australian Museum, Supplement, 13, 1 - 866. http: // dx. doi. org / 10.3853 / j. 0812 - 7387.13.1991.367
Bate, C. S. & Westwood, J. O. (1868) A History of the British Sessile-eyed Crustacea. John Van Voorst, London, 536 pp.
Boeck, A. (1876) De Skandinaviske og Arktiske Amphipoder. Part 2. A. W. Brogger, Christiania, pp. 1 - 713, pls. 168 - 132. http: // dx. doi. org / 10.5962 / bhl. title. 10131
Lincoln, R. J. (1979) British Marine Amphipoda: Gammaridea. British Museum (Natural History), London, v + 658 pp.
Lowry, J. K. & Stoddart, H. E. (1989) Stephonyx, a new, widespread genus of lysianassoid Amphipoda. Zoologica Scripta, 18, 519 - 525. http: // dx. doi. org / 10.1111 / j. 1463 - 6409.1989. tb 00145. x
Norman, A. M. (1867) Report of the committee appointed for the purpose of exploring the coasts of the Hebrides by means of the dredge. Part II. On the Crustacea, Echinodermata, Polyzoa, Actinozoa, and Hydrozoa. Report of the British Association for the Advancement of Science, 36, 193 - 206.
Pirlot, J. M. (1933) Les amphipodes de l'expedition du Siboga. Deuxieme partie: Les amphipodes gammarides, II: - Les amphipodes de la mer profonde. 1. (Lysianassidae, Stegocephalidae, Stenothoidae, Pleustidae, Lepechinellidae). Siboga- Expeditie, Monographie, 33 c, 114 - 167.
Pirlot, J. M. (1936) Les amphipodes de l'expedition du Siboga. Deuxieme partie: Les amphipodes gammarides, II. - Les amphipodes de la mer profonde. 3: Addendum et partie generale. III. - Les amphipodes littoraux. 1: Lysianassidae, Ampeliscidae, Leucothoidae, Stenothoidae, Phliantidae, Colomastigidae, Ochlesidae, Liljeborgiidae, Oedicerotidae, Synopiidae, Eusiridae, Gammaridae. Siboga-Expeditie, Monographie, 33 e, 237 - 328.
Sars, G. O. (1891) An Account of the Crustacea of Norway, with Short Descriptions and Figures of all the Species. Vol. I. Amphipoda. Parts 4 - 9. Alb. Cammermeyer, Christiana, 144 pp., 48 pls. [pp. 69 - 212, pls. 225 - 272]
Stebbing, T. R. R. (1906) Amphipoda. I. Gammaridea. Das Tierreich, 21, 1 - 806.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Euonyx Norman, 1867
Lowry, J. K. & Kilgallen, N. M. 2014 |
Euonyx
Barnard, J. L. & Karaman, G. S. 1991: 485 |
Lowry, J. K. & Stoddart, H. E. 1989: 519 |
Lincoln, R. J. 1979: 54 |
Barnard, J. L. 1969: 342 |
Pirlot, J. M. 1936: 116 |
Stebbing, T. R. R. 1906: 19 |
Sars, G. O. 1891: 116 |
Norman, A. M. 1867: 202 |
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