Anchiarthrus Markham, 1992

DIAGNOSIS (modified from Markham, 1992a): Female: Body distorted less than 90 °; head lacking antennal groove; barbula with single projection on each side. First and second pereopods of long side large, others small; first and second pereopods on short side absent others small and clustered near pleon. Oostegite 1 dimorphic, smaller one much longer than wide. Pleonal separation indistinct with three pleomeres indicated; three pairs of lanceolate lateral plates, progressively smaller posteriorly; three pairs of biramous pleopods, progressively larger posteriorly.

Male: Body slightly more than twice as long as broad. Head distinct from pereon; antennae prominently extended beyond margin of head. Last pereomere fused with pleon, remnants of pleomeres indicated laterally.

TYPE SPECIES: Anchiarthrus derelictus Markham, 1992, by original designation.

OTHER SPECIES: None.