Phyllophaga karlsioei
(Linell, 1897)
May beetle, June beetle
Phyllophaga karlsioei is a of scarab beetle in the Scarabaeidae, one of over 400 species in the Phyllophaga found in North America. Like other May beetles, it is likely with emerging in late spring to early summer. The genus is characterized by larvae that feed on plant roots in soil, earning them the 'white .'
Pronunciation
How to pronounce Phyllophaga karlsioei: /ˌfɪləˈfeɪɡə ˌkɑːrlˈsiːoʊi/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
-level identification within Phyllophaga is notoriously difficult and typically requires examination of male and female genitalia. No distinctive external morphological features distinguishing P. karlsioei from are documented in the provided sources.
Distribution
Recorded from Arkansas and Texas in the south-central United States. Distribution records are sparse, with only one iNaturalist observation documented.
Seasonality
likely active in late spring through early summer (May-June), consistent with the 'May beetle' and of .
Life Cycle
Complete with soil-dwelling larval stage. Larvae are root-feeding 'white ' that develop over one or more years before pupating in soil. emerge to mate and disperse, with females returning to soil to oviposit.
Behavior
are and attracted to lights. Males likely use to detect female , as documented in related Polyphylla.
Ecological Role
Larvae function as root herbivores in soil . may contribute to nutrient cycling through feeding on foliage and serve as prey for .
Human Relevance
May beetles in the Phyllophaga are occasionally serious crop pests, particularly when new plantings occur in former grasslands. No specific economic impact has been documented for P. karlsioei.
Similar Taxa
- Phyllophaga cribrosaShares oval, convex body form and flightless or poor-flying habit; distinguished by P. cribrosa's cribrose (sieve-like) elytral surface and distinct longitudinal elytral furrows
- Phyllophaga lanceolataSimilar heavy-bodied form with conspicuous covering; P. lanceolata is and active on bare ground in shortgrass prairie, differing in preference and activity period
- Polyphylla hammondiSuperficially similar large, buzzing scarab beetles attracted to lights; distinguished by greatly enlarged, fan-like in males and association with sand dune
More Details
Taxonomic challenges
With over 400 in North America, Phyllophaga is one of the most species-rich in the fauna. Species identifications rely heavily on genitalia examination, making field identification impractical without specialized expertise.