Tmetonyx Stebbing 1906

Lowry, J. K. & Kilgallen, N. M., 2014, A generic review of the lysianassoid family Uristidae and descriptions of new taxa from Australian waters (Crustacea, Amphipoda, Uristidae), Zootaxa 3867 (1), pp. 1-92 : 78-80

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.6319065

persistent identifier

https://treatment.plazi.org/id/03AE8B60-AC4B-FF97-6CC1-F96EFBD8C151

treatment provided by

Felipe (2021-06-11 20:53:46, last updated 2024-11-29 10:29:20)

scientific name

Tmetonyx Stebbing 1906
status

 

Tmetonyx Stebbing 1906 View in CoL View at ENA

( Fig. 48 View FIGURE 48 )

Hoplonyx Sars, 1891: 91 (homonym, Coleoptera ).— Stebbing, 1894: 9.

Tmetonyx Stebbing 1906: 73 View in CoL (new name).—J.L. Barnard, 1969: 365.— Barnard & Karaman, 1991: 441 (key), 535.

Type species. Oniscus cicada O. Fabricius, 1780 , original designation.

Included species. Tmetonyx View in CoL includes 8 species: T. acuta (G.O. Sars, 1891) ; T. albida (G.O. Sars, 1891) ; T. cicada (O. Fabricius, 1780) View in CoL ; T. gulosa ( Krøyer, 1845) View in CoL ; T. leucophthalma (G.O. Sars, 1891) ; T. nardonis ( Heller, 1867) View in CoL ; T. palpiserrata Bellan-Santini, 1985 View in CoL ; T. rotundata (Chevreux, 1926a) ; T. similis (G.O. Sars, 1891) View in CoL .

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 with weakly developed brush setae. Mandible molar a reduced column with convex, fully triturating surface. Maxilla 1 outer plate a well developed 7/4 crown. Maxilla 2 inner plate significantly shorter than outer plate. Gnathopod 1 subchelate; coxa 1 large, about as long as coxa 2, subrectangular with straight anterior margin; ischium long (length 2 × to 4 × breadth); carpus long (length 2 to 4 × breadth); propodus margins subparallel. Uropod 2 inner ramus not constricted. Telson deeply cleft .

Remarks. Based on the subchelate gnathopod 1 with a fully developed coxa and long carpus Tmetonyx appears to be similar to Anonyx and Caeconyx . Tmetonyx differs from Anonyx in the accessory flagellum cap (present in Anonyx and Caeconyx ), the mandibular molar (setose with a vestigial triturating surface in Anonyx and Caeconyx ), gnathopod 1 ischium (short in Anonyx and Caeconyx ).

Distribution. Atlantic Ocean: North Atlantic; North Polar Sea; Mediterranean Sea.

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

Bellan-Santini, D. (1985) Amphipodes profonds de Mediterranee (Campagnes Biomede I, Polymede I et II). Bollettino del Museo Civico di Storia Naturale di Verona, 10, 263 - 313.

Fabricius, O. (1780) Fauna Groenlandica, systematice sistens animalia Groenlandiae occidentalis hactenus indagata, quoad nomen specificum, triviale, vernaculumque; synonyma auctorum plurium, descriptionem, locum, victum, generationem, mores, usum, capturamque singuli, provt detegendi occasio fuit, maximaque parte secundum proprias observationes Othonis Fabricii. Hafniae et Lipsiae, 452 pp. http: // dx. doi. org / 10.5962 / bhl. title. 13489

Heller, C. (1867) Beitrage zur naheren Kenntniss der Amphipoden des Adriatischen Meeres. Denkschriften der Kaiserlichen Akademie der Wissenschaften, Wien. Mathematisch-Naturwissenschaftliche Klasse, 26, 1 - 62, pls. 61 - 64.

Kroyer, H. N. (1845) Karcinologiske Bidrag. Naturhistorisk Tidsskrift, Series 2, 1, 283 - 345, pls. 281 - 283; 403; 453 - 638, pls. 286, 287.

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. (1894) The Amphipoda collected during the voyages of the Willem Barents in the Arctic Seas in the years 1880 - 1884. Bijdragen tot de Dierkunde, 17, 1 - 48, pls. 41 - 47.

Stebbing, T. R. R. (1906) Amphipoda. I. Gammaridea. Das Tierreich, 21, 1 - 806.

Gallery Image

FIGURE 48. Tmetonyx cicada (O. Fabricius, 1780), syntype male, 16.9 mm, female, 18.1 mm, ZMUC CRU-6032; habitus from male, 14.5 mm, AM P.38309; western Greenland. Scale bars: gnathopods, pereopods, 1.0 mm; remainder, 0.2 mm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Uristidae