Dynomenidae and Dromiidae (Decapoda, Brachyura) from Guam, Philippine Islands, Tonga and Samoa Author Mclay, Colin L. Zoology Department, Canterbury University, Christchurch, PB 4800 (New Zealand) c. mclay @ zool. canterbury. ac. nz. text Zoosystema 2001 23 4 807 856 journal article 6377 10.5281/zenodo.4689208 72669070-3bd6-41be-bd47-f386c83d0927 1638-9387 4689208 Genus Cryptodromia Stimpson, 1858 DIAGNOSIS. — Carapace as wide or wider than long, surface smooth or with a few scattered granules, convex. Rostrum tridentate. Supraorbital tooth small, blunt, usually a small postorbital tooth, and welldeveloped suborbital tooth. Anterolateral border may bear up to three teeth and subhepatic area may have up to two small tubercles. Antennal exopod welldeveloped. Coxae of third maxillipeds usually separat- ed by a gap and may be inserted directly under tip of sternum or well forward and separated by a deep trough. Female sternal sutures 7/8 end apart on small tubercles between or behind bases of first legs. Cheliped usually without an epipod but it may be present, carpal and propodal segments usually nodular. Carpi and propodi of first two pairs of legs may be lobed, nodular or tubercular and inner margins of dactyli have up to six small spines. Last two pairs of legs reduced but still capable of carrying camouflage, fourth pair longer, dactyli opposed by a single propo- dal spine with up to two spines on the outer propodal margin. Abdomen of six free segments. Uropod plates well-developed and visible externally, employed in the abdominal locking mechanism by fitting in front of flanges of the base of first pair of legs. Telson usually rounded, but may be truncate or even bilobed. Abdominal segments smooth and third to fifth segments may have lateral and/or median tubercles. First male gonopod sharply tipped, setose, second gonopod simple needle-like (after McLay 1993 ).