Dodecas Stebbing, 1883

Takeuchi, Ichiro & Lowry, James K., 2015, A taxonomic study on the Phtisicidae (Crustacea: Amphipoda) of New South Wales, Australia, Journal of Natural History 50, pp. 603-648 : 605

Genus Dodecas Stebbing, 1883

Diagnosis

Head fused with pereonite 1. Antenna 1 well developed; flagellum with more than two articles; accessory flagellum absent. Antenna 2 well developed; flagellum with more than three articles. Mandible well developed; molar absent; palp 3-articulate; palp setal formula 1 – x – 1. Maxilliped well developed; inner plate (basal endite) larger than outer plate (ischial endite); outer plate (ischial endite) well developed; palp article 3 without distal projection; palp article 4 well developed. Pereonite 4 clavate appendage absent. Pereonites 6 and 7 not fused. Pereopod 3 well developed, with seven articles. Pereopod 4 absent. Pereopod 5 reduced with four articles. Pereopods 6 and 7 well developed, with seven articles. Gills on pereonites 2 to 4. Pleopods present, one pair, tiny. Uropods two pairs; uropod 1, uniramous; uropod 2, uniramous. Telson (dorsal lobe) present.

Type species

Dodecas elongata Stebbing, 1883 , monotypy.

Included species

Dodecas includes seven species: Dodecas decacentrum Stebbing, 1910b ; Dodecas elongata Stebbing, 1883 ;? Dodecas eltaninae McCain and Gray, 1971 ; Dodecas grandimanus Guiler, 1954 ; Dodecas hexacentrum Mayer, 1903 ; Dodecas reducta K.H. Barnard, 1932 ; Dodecas tasmaniensis Guiler, 1954 .

Remarks

The genus Dodecas was established specifically for D. elongata Stebbing, 1883 by Stebbing (1883). The generic diagnosis of the present genus is provided based on the present description of D. decacentrum Stebbing, 1910b and D. hexacentrum Mayer, 1903 .