Mason-bee
Guides
Pseudoanthidium nanum nanum
Pseudoanthidium nanum nanum is a synonymized subspecies of the small mason bee Pseudoanthidium nanum (Mocsáry, 1880), originally described from Europe. The subspecific epithet has been synonymized under the nominate species, which is now treated as a single widespread taxon. The species belongs to the tribe Anthidiini (wool-carder and mason bees) within Megachilidae, characterized by their use of plant fibers or resin in nest construction.
Trachusa
Trachusa is a genus of resin bees in the family Megachilidae, tribe Anthidiini, comprising at least 50 described species distributed across the Palearctic region. Recent taxonomic revisions have revealed extensive cryptic diversity, with several species complexes (e.g., T. interrupta and T. pubescens groups) resolved from formerly recognized single widespread species into multiple distinct, often allopatric or narrowly sympatric species. These bees are characterized by resin-collecting behavior and are classified as leafcutter, mason, and resin bees, though specific nesting biology is documented for few species.