Home / Ground Beetles (Carabidae) / Epomis Beetles (Epomis)

Epomis Beetles (Epomis)

Epomis beetles belong to the family of ground beetles. Their feeding behavior is unique as these beetles prey on amphibians in an interesting role reversal of predator and prey.

Epomis Beetle

List of Species Belonging to this Genus

  • Epomis alluaudi
  • Epomis pharaonis
  • Epomis elisabethanus
  • Epomis barkeri
  • Epomis loveridgei
  • Epomis lastii
  • Epomis bocandei
  • Epomis circumscriptus
  • Epomis croesus
  • Epomis croyi
  • Epomis amarae
  • Epomis daressalaami
  • Epomis dejeani
  • Epomis deplanatus
  • Epomis duvaucelii
  • Epomis immunitus
  • Epomis elongatus
  • Epomis fimbriatus
  • Epomis jordani
  • Epomis kenyerii
  • Epomis latreillei
  • Epomis vientianensis
  • Epomis louwerensi
  • Epomis nigricans
  • Epomis nossibianus
  • Epomis violaceipennis
  • Epomis protensus
  • Epomis rhodesianus
  • Epomis simba
  • Epomis tschitscherini

Physical Description and Identification

Adult 

Size: 0.59–1.02 in (1.5–2.6 cm)

Color: These beetles are shiny blue or green. There is a conspicuous yellow-orange rim on the covers of their wings and yellow antennae and legs.

Other Characteristic Features: These beetles are similar to the ground beetle genus Chlaenius. One can distinguish the epomis beetle from its shorter, triangular mouthparts. 

Epomis

Larva

The larvae of these beetles are yellow or white, covered with black and orange markings. They have mandibles with two hooks and two extensions protruding from their last segment. Fully mature larva reach up to 0.79 in (2 cm).

Epomis Beetle Larva

Pupa

After maturing, the larvae would pupate underground.

Egg

Like other ground beetles, epomis beetles lay their eggs either on or within the soil.

Quick Facts

Lifespan1 year
DistributionThe Palaearctic, the Middle and Near East, and northern parts of Africa
HabitatRain pools and temporary ponds
PredatorsNot recorded
Seasons activeWet seasons
HostsAmphibians such as frogs, newts, and toads
Diet of adultsAmphibians, but also general prey such as earthworms, maggots, and other beetles
Epomis Beetle Images

Identifying the Damage Caused by Them

These beetles cause no identifiable damage.

Epomis Beetle Picture

Did You Know

  • The way these beetles feed is a mix of predatory and parasitic behaviors. The larva writhes and shakes to make it appealing to an amphibian. Once the unsuspecting creature swallows it, the larva uses its mandibles to attach to the prey’s tongue and begins to digest its tissues. On the other hand, the adult beetle attacks the amphibian’s legs from behind, preventing them from escaping. It will then eat its fill and leave the rest behind for other animals to finish off.

Image Source: upload.wikimedia.org, wired.com, scx2.b-cdn.net, i.pinimg.com, encrypted-tbn0.gstatic.com

Epomis beetles belong to the family of ground beetles. Their feeding behavior is unique as these beetles prey on amphibians in an interesting role reversal of predator and prey.

Epomis Beetle

List of Species Belonging to this Genus

  • Epomis alluaudi
  • Epomis pharaonis
  • Epomis elisabethanus
  • Epomis barkeri
  • Epomis loveridgei
  • Epomis lastii
  • Epomis bocandei
  • Epomis circumscriptus
  • Epomis croesus
  • Epomis croyi
  • Epomis amarae
  • Epomis daressalaami
  • Epomis dejeani
  • Epomis deplanatus
  • Epomis duvaucelii
  • Epomis immunitus
  • Epomis elongatus
  • Epomis fimbriatus
  • Epomis jordani
  • Epomis kenyerii
  • Epomis latreillei
  • Epomis vientianensis
  • Epomis louwerensi
  • Epomis nigricans
  • Epomis nossibianus
  • Epomis violaceipennis
  • Epomis protensus
  • Epomis rhodesianus
  • Epomis simba
  • Epomis tschitscherini

Physical Description and Identification

Adult 

Size: 0.59–1.02 in (1.5–2.6 cm)

Color: These beetles are shiny blue or green. There is a conspicuous yellow-orange rim on the covers of their wings and yellow antennae and legs.

Other Characteristic Features: These beetles are similar to the ground beetle genus Chlaenius. One can distinguish the epomis beetle from its shorter, triangular mouthparts. 

Epomis

Larva

The larvae of these beetles are yellow or white, covered with black and orange markings. They have mandibles with two hooks and two extensions protruding from their last segment. Fully mature larva reach up to 0.79 in (2 cm).

Epomis Beetle Larva

Pupa

After maturing, the larvae would pupate underground.

Egg

Like other ground beetles, epomis beetles lay their eggs either on or within the soil.

Quick Facts

Lifespan1 year
DistributionThe Palaearctic, the Middle and Near East, and northern parts of Africa
HabitatRain pools and temporary ponds
PredatorsNot recorded
Seasons activeWet seasons
HostsAmphibians such as frogs, newts, and toads
Diet of adultsAmphibians, but also general prey such as earthworms, maggots, and other beetles
Epomis Beetle Images

Identifying the Damage Caused by Them

These beetles cause no identifiable damage.

Epomis Beetle Picture

Did You Know

  • The way these beetles feed is a mix of predatory and parasitic behaviors. The larva writhes and shakes to make it appealing to an amphibian. Once the unsuspecting creature swallows it, the larva uses its mandibles to attach to the prey’s tongue and begins to digest its tissues. On the other hand, the adult beetle attacks the amphibian’s legs from behind, preventing them from escaping. It will then eat its fill and leave the rest behind for other animals to finish off.

Image Source: upload.wikimedia.org, wired.com, scx2.b-cdn.net, i.pinimg.com, encrypted-tbn0.gstatic.com

Leave a Reply

Your email address will not be published.