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''Megalopinus'' is the only genus in the subfamily Megalopsidiinae of the
Staphylinidae The rove beetles are a family (biology), family (Staphylinidae) of beetles, primarily distinguished by their short elytra (wing covers) that typically leave more than half of their abdominal segments exposed. With over 66,000 species in thousand ...
. Species in this genus have large eyes, antennae with distinct di- or trisegmented clubs. The
tarsal formula A tarsal formula states the number of segments of an insect's tarsi as three numbers, a-b-c, starting with the fore leg (a), then the middle leg (b), then the hind leg (c). For example, a tarsal formula of "5-5-4" as found in the Trictenotomid ...
is 5-5-5. They have unique elongated processes at the anterior margin of the labrum. They are found in decaying trees and fungus-infested logs. Four species are found in North America: ''Megalopinus caelatus'' (Gravenhorst, 1802), ''Megalopinus punctatus'' (Erichson, 1840), ''Megalopinus rufipes'' (LeConte, 1863) and
Megalopinus lingafelteri

Mainda
2023. So far, more than 430 species are known from the entire New World. From the Orientalis 74 (+ one fossil, ''Megalopinus extinctus'' Yamamoto & Solodovnikov, 2016, described from
Burmese amber Burmese amber, also known as Burmite or Kachin amber, is amber from the Hukawng Valley in northern Myanmar. The amber is dated to around 100 million years ago, during the latest Albian to earliest Cenomanian ages of the mid-Cretaceous period. Th ...
) species are known. Image: Megalopinus caelatus 0157226 dorsal.tif, ''Megalopinus caelatus'' Image: Megalopinus caelatus 0157226 head.tif, ''M. caelatus''


References


External links


Megalopsidiinae at Bugguide.net.
{{Taxonbar, from1=Q4043911, from2=Q17130804 Staphylinidae Beetle genera Taxa described in 1915