Pacific-rim
Guides
Anisogammaridae
Anisogammaridae is a family of small benthic amphipod crustaceans endemic to the northern Pacific Rim. The family includes freshwater, estuarine, and marine species distributed across the Japanese Archipelago, Korean Peninsula, Chinese mainland, and Pacific coast of North America. Members exhibit diverse life history strategies including annual winter-breeding cycles in temperate freshwater habitats and bivoltine patterns in estuarine environments. The family is notable for containing the most diverse group of Japanese freshwater amphipods (genus Jesogammarus) and species of conservation concern due to restricted ranges and habitat vulnerability.
Paranonychidae
Paranonychid Harvestmen
Paranonychidae is a family of armored harvestmen (Opiliones) containing 9 genera and at least 28 described species. The family was established by Briggs in 1971 and is classified within the superfamily Travunioidea. Members are characterized by heavily sclerotized body armor, an adaptation that distinguishes them from many other harvestman families. The family has a predominantly Pacific Rim distribution, with genera found in Japan, western North America, and other regions.