Late-cretaceous-origin

Guides

• Cryptorhynchinae

  hidden-snout weevils

  Cryptorhynchinae is a large subfamily of weevils (Curculionidae) comprising approximately 6,000 species. The subfamily is distinguished by a rostrum that folds backward between the fore coxae in repose, fitting within a protective channel on the mesoventrite. Molecular evidence supports its monophyly as an independent subfamily rather than inclusion within Molytinae. The group is most diverse in the Neotropics, Australia, and Oceania, with an evolutionary origin in the Late Cretaceous of South America.

  weevilsCurculionidaehidden-snout-weevilsorchid-pollinationfossil-amberstridulationforest-faunadead-wood-associatedagricultural-pestmango-pestLate-Cretaceous-originIndo-Australian-radiationflightless-weevilsprimary-forest-dependenthabitat-loss-threatened

• Micracidini

  Micracidini is a tribe of Afrotropical bark beetles within Scolytinae. The tribe comprises 11 valid genera following a 2021 taxonomic revision that erected five new genera (Neomicracis, Leiomicracis, Diplotrichus, Pseudolanurgus, Microlanurgus) and synonymized one genus. Phylogenetic analyses based on five molecular markers and morphological characters support this classification. The tribe originated in the late Cretaceous and exhibits a biogeographic pattern centered on Madagascar, which was colonized once from East Africa followed by multiple re-colonizations to the mainland.

  bark-beetlesAfrotropicalMadagascarScolytinaephylogenetic-revisionendemiclate-Cretaceous-origin