Crangonyx is a genus of crustacean in family Crangonyctidae. Crangonyx species can live in marshes, savannas or swamps as well as caves. It contains the following species:
- Crangonyx aberrans <small>S. I. Smith, 1983</small>
- Crangonyx acicularis <small>Zhang & Holsinger, 2003</small>
- Crangonyx africanus <small>Missouli, 2006</small>
- Crangonyx aka <small>Zhang & Holsinger, 2003</small>
- Crangonyx alpinus <small>Bousfield, 1983</small>
- Crangonyx anomalus <small>Hubricht, 1943</small>
- Crangonyx antennatus <small>Cope & Packard, 1881</small>
- Crangonyx arsenjevi <small>(Derzjavin, 1927)</small>
- Crangonyx baculispina <small>Zhang & Holsinger, 2003</small>
- Crangonyx barri <small>Zhang & Holsinger, 2003</small>
- Crangonyx bousfieldi <small>Zhang & Holsinger, 2003</small>
- Crangonyx caecus <small>Zhang & Holsinger, 2003</small>
- Crangonyx castellanum <small>Zhang & Holsinger, 2003</small>
- Crangonyx chlebnikovi <small>Borutzky, 1928</small>
- Crangonyx consimilis <small>Zhang & Holsinger, 2003</small>
- Crangonyx cooperi <small>Zhang & Holsinger, 2003</small>
- Crangonyx cornutus <small>Zhang & Holsinger, 2003</small>
- Crangonyx dearolfi <small>Shoemaker, 1942</small>
- Crangonyx disjunctus <small>Zhang & Holsinger, 2003</small>
- Crangonyx ermannii <small>(Milne-Edwards, 1840)</small>
- Crangonyx floridanus <small>Bousfield, 1963</small>
- Crangonyx fontinalis <small>Zhang & Holsinger, 2003</small>
- Crangonyx forbesi <small>(Hubricht & Mackin, 1940)</small>
- Crangonyx gracilis <small>S. I. Smith, 1871</small>
- Crangonyx grandimanus <small>Bousfield, 1963</small>
- Crangonyx hobbsi <small>Shoemaker in Ellis, 1941</small>
- Crangonyx hubrichti <small>Zhang & Holsinger, 2003</small>
- Crangonyx indianensis <small>Zhang & Holsinger, 2003</small>
- Crangonyx insolitus <small>Zhang & Holsinger, 2003</small>
- Crangonyx islandicus <small>Svavarsson & Kristjánsson, 2006</small>
- Crangonyx lewisi <small>Zhang & Holsinger, 2003</small>
- Crangonyx longicarpus <small>Zhang & Holsinger, 2003</small>
- Crangonyx longidactylus <small>Zhang & Holsinger, 2003</small>
- Crangonyx minor <small>Bousfield, 1958</small>
- Crangonyx montanus <small>Zhang & Holsinger, 2003</small>
- Crangonyx obliquus <small>(Hubricht & Mackin, 1940)</small>
- Crangonyx occidentalis <small>Hubricht & Harrison, 1941</small>
- Crangonyx ohioensis <small>Zhang & Holsinger, 2003</small>
- Crangonyx orientalis <small>Zhang & Holsinger, 2003</small>
- Crangonyx packardi <small>S. I. Smith, 1888</small>
- Crangonyx palustris <small>Zhang & Holsinger, 2003</small>
- Crangonyx paxi <small>Schellenberg, 1942</small>
- Crangonyx pseudogracilis <small>Bousfield, 1958</small>
- Crangonyx richmondensis <small>Ellis, 1941</small>
- Crangonyx rivularis <small>Bousfield, 1958</small>
- Crangonyx serratus <small>(Embody, 1910)</small>
- Crangonyx setodactylus <small>Bousfield, 1958</small>
- Crangonyx shoemakeri <small>Hubricht & Mackin, 1940</small>
- Crangonyx specus <small>Zhang & Holsinger, 2003</small>
- Crangonyx stagnicolous <small>Zhang & Holsinger, 2003</small>
- Crangonyx subterraneus <small>Bate, 1859</small>
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