Caeconyx Barnard & Karaman, 1991

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 : 12

Caeconyx Barnard & Karaman, 1991

( Fig. 3 )

Caeconyx Barnard & Karaman, 1991: 473 .

Type species. Hoplonyx caeculus Sars, 1891 , original designation.

Included species. Caeconynx includes one species: C. caeculus ( Sars, 1891) .

Diagnostic description. Antenna 1 peduncle article 1 without anterodistal lobe; accessory flagellum forming cap covering callynophore. Antenna 2 without brush setae. Mandible molar setose with vestigial triturating surface. Maxilla 1 outer plate a well developed 7/4 crown. Maxilla 2 inner plate slightly shorter than outer plate. Gnathopod 1 subchelate; coxa 1 large, about as long as coxa 2, subrectangular with straight anterior margin; ischium short (length less than 2 × breadth); carpus long (length 2 to 4 × breadth); propodus margins subparallel. Uropod 2 inner ramus not constricted. Telson deeply cleft .

Remarks. Caeconyx has no distinctive generic level characters. It appears to be similar to Anonyx . It differs from Anonyx in the mandibular palp which is attached midway in Anonyx (attached distally in Caeconyx ) and the margins of the gnathopod 1 propodus which are tapering in Anonyx .

Distribution. North-eastern Atlantic Ocean. Iceland to Trondheimsfjord.

Figures

FIGURE 3. Caeconyx caeculus (Sars, 1891),? male, approx. 3.7 mm, ZMO F13319, Leksvigen, Trondhjemsfjord, Norway. Scale bars: gnathopods, pereopods, 0.2 mm; remainder, 0.1 mm.