Hyastenus is a genus of crabs in the family Epialtidae, subfamily Pisinae, containing the following extant species: \n* Hyastenus ambonensis Griffin & Tranter, 1986 \n* Hyastenus aries (Latreille, 1825) \n* Hyastenus auctus Rathbun, 1916 \n* Hyastenus biformis Rathbun, 1916 \n* Hyastenus bispinosus Buitendijk, 1939 \n* Hyastenus borradailei (Rathbun, 1907) \n* Hyastenus brachychirus Nobili, 1899 \n* Hyastenus brevicornis Ortmann, 1894 \n* Hyastenus brockii de Man, 1887 \n* Hyastenus campbelli Griffin & Tranter, 1986 \n* Hyastenus consobrinus A. Milne-Edwards, 1895 \n* Hyastenus convexus Miers, 1884 \n* Hyastenus cornigerus Sakai, 1938 \n* Hyastenus cracentis Griffin & Tranter, 1986 \n* Hyastenus diacanthus (De Haan, 1839) \n* Hyastenus elatus Griffin & Tranter, 1986 \n* Hyastenus elongatus Ortmann, 1893 \n*