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  • Animals
    • Insects of Thailand >
      • Coleoptera - Beetles
      • Hemiptera - True Bugs
      • Lepidoptera - Butterflies
      • Lepidoptera - Moths
      • Odonata - Dragonflies & Damselflies
      • Hymenoptera - Bees, Wasps & Ants
      • Mantodea - Mantids
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      • Orthoptera - Grasshoppers, Katydids and Crickets
      • Blattodea - Cockroaches
      • Diptera and other Fly families
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      • Araneae - Spiders
      • Scorpiones - Scorpions
      • Opiliones - Harvestmen
      • Thelyphonida - Whip Scorpions
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Passalidae of Thailand.jpg

Passalidae Leach, 1815

Bess Beetles

Home > Insects > Coleoptera > Scarabaeoidea > Passalidae
Kingdom: Animalia
Class: Insecta
Order: Coleoptera
Superfamily: ​Scarabaeoidea
Family: Passalidae

Passalidae is a family of beetles known variously as "bessbugs" "bess beetles", "betsy beetles" or "horned passalus beetles". Nearly all of the 500-odd species are tropical; species found in North America are notable for their size, ranging from 20–43 mm, for having a single "horn" on the head, and for a form of social behavior unusual among beetles. Wikipedia

Subfamily: Passalinae
Genera: Aceraius
Aceraius grandis.jpg
Aceraius grandis
Please note that individual species identifications do not necessarily represent the opinion of all contributors.

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