Hirsutodynomene McLay, 1999

Mclay, Colin L. & Ng, Peter K. L., 2005, On a collection of Dromiidae and Dynomenidae from the Philippines, with description of a new species of Hirsutodynomene McLay, 1999 (Crustacea: Decapoda: Brachyura), Zootaxa 1029 (1), pp. 1-30 : 20-21

Hirsutodynomene McLay, 1999

Hirsutodynomene McLay, 1999: 504 .— McLay 2001a: 818 .

Diagnosis. Carapace much wider than long, commonly sub­circular. Dorsal surface moderately convex, sparsely spinous (especially in antero­branchial region), areolate, and covered with coarse setae, which are short and long, and arranged in tufts. Lateral carapace margin always well defined, armed with distinct teeth. Frontal groove well marked, splits in 2 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. Female sternal sutures 7/8 end well apart on low tubercles behind bases of second walking legs. Antennule can be concealed inside the orbit at base of eyestalk. Antennal flagella shorter than carapace width. All segments of antenna moveable, first article (urinal) always beaked medially and second article has exopod firmly fixed. Third maxillipeds opercular, completely covering buccal cavern, separated at 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 walking legs, dactylus strongly curved, fingers gaping basally. Last pair of legs very reduced, dactylus rudimentary, forming obsolete sub­chelate mechanism with extension of propodus. Gills usually 19 (including 6 podobranchs) + 7 epipods. Gill structure basically phyllobranchiate but plates very variable in shape. Abdomen of 6 segments and telson, folded loosely under thorax, uropods large, abdominal locking mechanism absent. Both sexes with 5 pairs of pleopods, first pair rudimentary in female, last 3 pairs vestigial in male. Male gonopods uniform in structure, first pair consist of a stout, setose semi­rolled tube with an apical plate, second pair needle­like with numerous sub­distal spines, some of which overlap, sinuously arranged around axis. (Abbreviated after McLay 1999.)

Type species. Dynomene spinosa Rathbun, 1911 , by original designation; gender feminine.

Included species: Hirsutodynomene spinosa ( Rathbun, 1911) , Hirsutodynomene ursula ( Stimpson, 1860) , Hirsutodynomene vespertilio n. sp.

Remarks: McLay (1999) had provided a detailed description and diagnosis of the genus, and the discovery of this new species from the Philippine Islands does not require any changes to his definition.