Hemiphileurus illatus

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Coleoptera
Suborder: Polyphaga
Superfamily: Scarabaeoidea
Family: Scarabaeidae
Subfamily: Dynastinae
Tribe: Phileurini
Genus: Hemiphileurus
Species: illatus

Pronunciation

How to pronounce Hemiphileurus illatus: /hɛmɪˈfaɪljʊrəs ɪˈleɪtəs/

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Summary

Hemiphileurus illatus, commonly known as the lesser triceratops beetle, is a species of rhinoceros beetle found in the Southwestern United States. They are detritivores and primarily inhabit urban and rural areas. Their life cycle includes stages as larvae and pupae, and they exhibit some unique physical characteristics such as horn size variation between sexes.

Physical Characteristics

Adults are black with a pitted thorax and elytra, measuring 19 - 25 mm long. Both sexes have horns, with females having smaller, nub-like horns. Larvae are cream-colored with reddish-brown heads and have a C-shaped posture. Pupae are exarate and change color from tan to dark brown as they develop.

Identification Tips

Look for the pair of horns on both sexes; females have smaller bumps instead of fully developed horns. They lack the notable third horn seen in Phileurus truncatus.

Habitat

Found in urban and rural areas, often near compost heaps or sand dunes.

Distribution

Primarily in the Southwestern United States, including Arizona, Nevada, New Mexico, and California.

Diet

Adults are detritivores and scavengers, primarily feeding on fresh or rotting plant matter and other dead insects. They prefer protein sources like insects and eggs.

Life Cycle

Undergo complete metamorphosis, with stages as eggs, larvae (cream-colored with reddish-brown heads), pupae (exarate), and adults.

Ecosystem Role

As decomposers, they play a role in nutrient cycling by breaking down dead organic matter.

Economic Impact

They are not agricultural pests and do not pose significant economic impacts.

Cultural Significance

It is legal to own and sell lesser triceratops beetles, but they are not highly sought-after in the beetle-keeping community.

Health Concerns

Pose no significant danger to humans or domestic animals.

Collecting Methods

Collected at light traps on sand dunes

Similar Taxa

Phileurus truncatus

Misconceptions

They are not dangerous pests and do not require special care that some exotic insects may need.