Benthic-predator
Guides
Frisonia
Frisonia is a genus of stoneflies in the family Perlodidae, established by Ricker in 1943. It belongs to the tribe Arcynopterygini within the subfamily Perlodinae. The genus is part of the diverse systellognathan stonefly assemblage, characterized by flexible gill structures and predatory habits in the nymphal stage.
Ovalipes
paddle crab, lady crab, three-spot swimming crab
Ovalipes is a genus of swimming crabs in the family Ovalipidae, established by Mary J. Rathbun in 1898. The genus comprises approximately 12 extant species distributed across marine coastal waters of the Pacific, Atlantic, and Indian Oceans. Several species hold commercial importance, particularly O. punctatus in East Asian fisheries and O. catharus in New Zealand. Members exhibit characteristic portunid adaptations for swimming, including flattened, paddle-shaped fifth pereiopods.