Taxonomy Animalia Arthropoda Hymenoptera Insecta Biodiversity Megachilidae Apidae Halictidae Andrenidae Osmia Andrena Hoplitis Fauna Europaea INSPIRE Taxonomic indexing Lasioglossum AlgaeBase Authority File EU-nomen EUBON Euro+Med PlantBase European Register of Marine Species European taxonomic backbone Global Names Architecture Index Fungorum International Plant Names Index (IPNI) LifeWatch Nomenclature PESI ZooBank Apoidea Colletidae Eucera Palaearctic nest construction oligolecty Apiformes Chelostoma Tracheophyta Magnoliopsida Hylaeus Vespoidea Masaridae Megachile Plantae taxonomy Animals Anthidium Biodiversity Informatics