Cyclocephala robusta

LeConte, 1863

Cyclocephala robusta is a of masked chafer in the Scarabaeidae, first described by John Lawrence LeConte in 1863. It belongs to the Dynastinae, though unlike many members of this group it lacks the large horns characteristic of the subfamily. The species is native to the south-central and southeastern United States. Like other Cyclocephala species, it likely has a involving root-feeding larval stages and beetles that do not feed on plants.

Pronunciation

How to pronounce Cyclocephala robusta: /ˌsɪkloʊˈsɛfəla roʊˈbʌstə/

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Identification

are small to medium-sized scarab beetles, approximately 10-15 mm in length. As a member of the masked chafer group, it possesses the characteristic dark facial marking or "mask" across the typical of the . The may be distinguished from similar Cyclocephala species by geographic range and subtle morphological differences, though precise diagnostic features require examination. The larvae are cream-colored, C-shaped white with brown , typical of scarab larvae.

Distribution

Recorded from the south-central and southeastern United States, including Alabama, Arkansas, Georgia, Indiana, Kansas, Louisiana, Mississippi, Missouri, Oklahoma, South Carolina, Tennessee, Texas, and Virginia. The distribution overlaps with that of other masked chafer in parts of this range.

Life Cycle

Based on congeneric , the likely involves laid in soil, larval development as white feeding on plant roots, in soil, and of . The larvae are the primary feeding and growing stage.

Behavior

are and attracted to lights. Based on related , adults likely do not feed on plant material. Larvae feed below ground.

Ecological Role

Larvae likely function as root-feeding or herbivores in soil . The may serve as prey for vertebrate including skunks and raccoons, which excavate soil to feed on the .

Human Relevance

As a member of a containing significant turfgrass pests, this may contribute to lawn damage in areas where it occurs, though specific pest status has not been documented. Control measures used for other masked chafers, including chemical and biological approaches using fungi, may apply.

Similar Taxa

Cyclocephala luridaThe southern masked chafer overlaps in range with C. robusta in parts of the southeastern United States. Both share the masked chafer and similar size. Geographic distribution and subtle morphological features distinguish them.
Cyclocephala borealisThe northern masked chafer occurs in the northeastern quarter of the United States, with some range overlap possible. Differences in distribution and separate the .