Wrack-zone
Guides
Americorchestia
beach hoppers
Americorchestia is a genus of beach hoppers (amphipods) in the family Talitridae, established by Bousfield in 1991. The genus contains five described species, including the common Atlantic sandhopper (A. longicornis) and the northern big-eyed sandhopper (A. megalophthalma). These amphipods inhabit coastal environments and are characterized by their jumping locomotion.
Coelopidae
kelp flies, seaweed flies
Coelopidae, commonly known as kelp flies or seaweed flies, is a small family of acalyptrate Diptera containing fewer than 40 species worldwide. These flies are specialized inhabitants of temperate seashore wrack zones, where their larvae develop in decaying seaweed. The family exhibits notable sexual dimorphism and complex mating behaviors involving scramble competition and sexual conflict. Coelopidae are significant decomposers in coastal ecosystems and can reach enormous biomass in their specialized habitat.
Heterocheila
half-bridge flies
Heterocheila is a genus of acalyptrate flies comprising the monotypic family Heterocheilidae. The genus contains two described species: Heterocheila buccata (Palearctic distribution across North America and Eurasia) and Heterocheila hannai (restricted to the northeastern USA and Pacific Northwest coasts). These flies are specialized inhabitants of temperate seashores, where adults and larvae feed on stranded kelp in the wrack zone.
Orygma
Orygma is a monotypic European genus of flies in the family Sepsidae, established by Meigen in 1830. The sole species, Orygma luctuosum, is associated with coastal wrack zones where its larvae develop in decaying seaweed and marine debris. The genus is classified in the subfamily Orygmatinae, reflecting its distinct ecological specialization within the Sepsidae.
Orygma luctuosum
A small European fly in the family Sepsidae, restricted to coastal wrack zones where larvae develop in decaying seaweed. The species shows a disjunct distribution with populations in northwestern Europe. Adults are active during warmer months.