Ucidinae Števčić, 2005

Shih, Hsi-Te, Ng, Peter K. L., Davie, Peter J. F., Schubart, Christoph D., Türkay, Michael, Naderloo, Reza, Jones, Diana & Liu, Min-Yun, 2016, Systematics of the family Ocypodidae Rafinesque, 1815 (Crustacea: Brachyura), based on phylogenetic relationships, with a reorganization of subfamily rankings and a review of the taxonomic status of Uca Leach, 1814, sensu lato and its subgenera, Raffles Bulletin of Zoology 64, pp. 139-175 : 159

Subfamily Ucidinae Števčić, 2005

Diagnosis. Carapace subovate, cordiform, very thick, swollen; regions distinct, grooves deep; fronto-orbital distance 1/2–2/3 of maximum carapace width, front broad; anterolateral margins strongly convex; orbital floor with tubercle at inner corner adjacent to antennule; eyestalks relatively short, cornea terminal without any distal ornament; buccal cavern elongated anteriorly, appearing longer than broad, third maxillipeds not completely covering it when closed; ischium and merus of third maxilliped elongate, fringed with long setae on inner surface; exopod of third maxilliped mostly concealed by endopod, with flagellum; chelipeds prominently unequal in adult males, less so in females, surfaces of male merus, carpus and palm armed with strong spines; first to fourth ambulatory legs with dense, long setae on ventral surface of merus, propodus and dactylus which obscure margins; no distinct brush of setae between bases of coxae of second and third ambulatory legs; male pleon with somites 5 and 6 fused; pleonal locking mechanism usually absent.