Revision Of The Genus Insulamon Ng & Takeda, 1992 (Crustacea: Decapoda: Potamidae) With Description Of Four New Species Author Freitag, Hendrik text Raffles Bulletin of Zoology 2012 2012-02-29 60 1 37 55 journal article 10.5281/zenodo.4508437 2345-7600 4508437 KEY TO THE INSULAMON SPECIES Proper identification without comparative material should be based on adult males. 1. Carapace not broader than 1.29 times length, and G1 with long distal part (tip) of terminal segment as long as or longer than dilated proximal base ( Figs. 3D , 7F ) .................................... 2 – Carapace at least, but usually more than 1.29 times as broad as long, and G1 with short distal part (tip) of terminal segment always shorter than dilated proximal base ( Figs. 5 F–K, 9F, 11F) ....................................................................................... 3 2. Male telson less than 1.2 times as broad as long ( Fig. 2C ). Tip of G1 sharply tapered ( Fig. 3 C–E). (Calamian Islands) ........ ................................................................................. I. unicorn – Male telson more than 1.2 times as broad as long ( Fig. 6C ). Tip of G1 not sharply tapered, rather clubbed or hooked ( Fig. 7 D–H). ( Palawan ) .................................................. I. magnum 3. Male sixth abdominal somite not broader than 1.9 times length, and tip of G1 distinctly hooked, perpendicular to the longitudinal axis ( Fig. 9 D–H). ( Palawan ) .................... I. johannchristiani – Male sixth abdominal somite at least, but usually broader than 1.9 times length; tip of G1 more or less straight, not hooked, pointing somewhat in the direction of the G1 longitudinal axis, not perpendicular ( Figs. 4 A–C, F–K, 11D–H). ( Palawan ) .. 4 4. Distal portion of G1 terminal segment corkscrew-like, curly at its base; proximal portion of terminal segment slender, not inflated subproximally and appearing evenly tapered ( Fig. 11 D–H). Terminal segment of mandibular palp most narrow medially, not evenly tapering. ( Palawan ) ........... I. porculum – Distal portion of G1 terminal segment not corkscrew-like at its base, only slightly twisted or bent at its base and proximal portion of terminal segment at least slightly, usually distinctly inflated subproximally and not evenly tapered ( Fig. 4 A–C, F–K). Terminal segment of mandibular palp evenly tapering towards apex. ( Palawan ) ................................ I. palawanense