McLay, 1999
Carapace as wide as long or slightly wider than long, moderately convex, subcircular; surface smooth. Tomentum composed of uniformly short, soft setae, which accentuate unevenness of carapace forming transverse troughs. Lateral carapace margin well defined and marked by indentations or armed with distinct teeth. Frontal groove well marked, split in two posteriorly; cervical, postcervical and branchial grooves usually evident. Frontal carapace margin broadly triangular, continuous, no rostrum or teeth. Eyestalks short; eyes protected by well defined orbits. Sternal sutures 7/8 of female end well apart on low tubercles behind bases of second ambulatory legs.
Antennule can be concealed inside orbit at base of eyestalk. Antennal flagella shorter than carapace width. All articles of antenna movable; first article (urinal) always beaked medially; second article has an exopod firmly fixed. Third maxillipeds opercular, completely covering buccal cavern, separated at their bases by a plate at same level as sternum; basis and ischium of endopod fused but joint always marked by a shallow groove. Crista dentata present. Chelipeds equal, stouter than ambulatory legs; fingers not strongly curved and touching for at least half their length. Last pair of legs sexually dimorphic, very reduced; dactyl rudimentary, forming an obsolete subchelate mechanism with an extension of propodus. Gill structure basically phyllobranchiate but plates have a variable number of epibranchial lobes.
Abdomen of six segments and telson folded loosely under thorax; uropods large, no effective abdominal locking mechanism. Sideways movement restricted by small spines or ridges on coxae of second and third pereiopods, adjacent to the margins of telson and penultimate abdominal segments. Both sexes have five pairs of pleopods; first pair vestigial in female; last three pairs rudimentary in male. Male pleopods uniform in structure; first pair consist of a stout, setose semi-rolled tube with an apical plate; second pair needle-like, bearing a row of curved spines on anterior surface. (McLay, 1999)
Type species: Dynomene devaneyi Takeda, 1977.
Species treated:
Metadynomene tanensis (Yokoya, 1933)