Haeteriinae

Marseul, 1857

Genus Guides

8

Haeteriinae is a of clown beetles (Histeridae) comprising over 110 and 330 described . Members are obligate myrmecophiles and , specialized as social that infiltrate and colonies. The subfamily exhibits dramatic behavioral and chemical adaptations for colony integration, including mouth-to-mouth feeding with , , and chemical mimicry of host scents. A 99-million-year-old fossil from Burmese amber demonstrates that this symbiotic relationship originated in the Cretaceous period, contemporaneous with the earliest-known ants.

Haeterius tristriatus by Michael S. Caterino. Used under a CC BY-SA 3.0 license.

Pronunciation

How to pronounce Haeteriinae: /haɪtəˈraɪni/

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Habitat

and colonies; specialized as obligate nest intruders of social insect colonies. Modern predominantly associated with Neotropical army ants (Ecitonini), particularly Eciton species. Some specimens collected by intercept traps suggest flights occur outside colonies.

Distribution

Global distribution as nest associates; modern diversity concentrated in Neotropical region. Fossil record includes 99-million-year-old Burmese amber from northern Myanmar (Cretaceous), indicating ancient origin and widespread historical distribution.

Host Associations

  • Ants (Formicidae) - obligate myrmecophile; specialized nest intruder with confirmed including mouth-to-mouth feeding, , and chemical mimicryConfirmed : Eciton burchelli, Eciton hamatum, Eciton mexicanum; earliest known association with stem-group Cretaceous ants
  • Termites - obligate characterized as obligate myrmeco- and termitophilous, though specific records less documented than associations

Behavior

Mouth-to-mouth feeding with ants; of worker ants; chemical mimicry of scents to avoid detection and aggression. Release of chemical signals from glands near leg bases to deceive or pacify host ants. Some exhibit specialized phoretic transport: Nymphister kronaueri uses elongated as gripping pliers to attach between the petiole and postpetiole of medium-sized Eciton mexicanum workers, hitchhiking during colony emigrations. Morphological adaptations include thick spiked legs and well-protected and to withstand handling by ant mandibles.

Ecological Role

Social within and colonies; potentially represents the oldest known behavioral in Metazoa based on social interactions between organisms. Pervasive switching throughout evolutionary history inferred from fossil record and modern diversity.

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