Eudiagogini

LeConte, 1874

Eudiagogini is a tribe of broad-nosed (: Entiminae) comprising approximately 98 extant in 10 , with highest diversity in the Neotropics. The tribe is characterized by distinctive morphological including a cavernous prementum and a metaventrite bearing a -like swelling to each metacoxa. Phylogenetic analyses based on and molecular data (COI and ribosomal markers) confirm the of Eudiagogini, though the genus Chileudius has been excluded and placed as incertae sedis within Entiminae. The tribe has a fossil record in Eocene European amber, indicating a broader historical distribution.

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Pronunciation

How to pronounce Eudiagogini: /ˌjuːdiːˌæɡoʊˈdʒaɪniː/

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Identification

Diagnostic features for Eudiagogini include: cavernous prementum (a hollowed or deeply concave premental structure); metaventrite with -like swelling positioned to each metacoxa. The Eudius within this tribe is distinguished by basally connate and the presence of in the of female .

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Habitat

Primarily associated with Neotropical forest , including the Brazilian Atlantic Forest , a hotspot characterized by high humidity and complex vegetation structure.

Distribution

to the Americas with highest diversity in the Neotropics; present in Brazil (Bahía, Espírito Santo, Minas Gerais, Rio de Janeiro, São Paulo, Santa Catarina, Paraná). Fossil evidence indicates historical presence in Eocene Europe.

Similar Taxa

  • AnypotactiniBoth are broad-nosed tribes in Entiminae with distributions and Eocene European fossil records; distinguished by different morphological characters and premental structure.
  • Chileudius (genus)Formerly placed in Eudiagogini but now excluded based on phylogenetic analyses; lacks the cavernous prementum and metaventrite characteristic of true Eudiagogini.

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