Megalopsidiinae is a of rove beetles (Staphylinidae) characterized by large , with distinct di- or trisegmented clubs, and unique elongated processes at the margin of the . The subfamily includes the Megalopinus, with documented from Madagascar, eastern Australia, and North America. Recent taxonomic work has described new species and clarified male genital structures, including the first report of a sperm pump in this subfamily.
Identification
Distinguished from other Staphylinidae by: large relative to size; with distinct di- or trisegmented clubs; tarsal formula 5-5-5; and elongated processes at the margin of the . The epipleural complex (merged sublateral and epipleural elytral puncture-rows) has been proposed as a diagnostic morphological feature in some .
Images
Habitat
Has been observed in decaying trees and fungus-infested logs.
Distribution
Madagascar; eastern Australia (Queensland, New South Wales); North America (at least two : Megalopinus caelatus and M. rufipes).
Sources and further reading
- BugGuide
- iNaturalist taxon
- NCBI Taxonomy
- Catalogue of Life
- Megalopinus casuarius sp. nov. from the Cape York Peninsula and new distribution data of Megalopinus species in eastern Australia (Staphylinidae, Megalopsidiinae).
- A new species and new records of Malagasy Megalopinus Eichelbaum (Coleoptera, Staphylinidae, Megalopsidiinae), with notes on the sperm pump in rove beetles