Phyllobaenus
Dejean, 1833
checkered beetles
Species Guides
25Phyllobaenus is a of checkered beetles in the Cleridae, comprising at least 60 described . The genus is notable for containing the first documented case of of ants, with P. obscurus developing inside intact cocoons of Ectatomma ruidum . Most clerid beetles are predatory, making this habit a significant departure from typical family adaptations. Members of this genus exhibit diverse ecological relationships, including associations with wood-boring beetles, solitary bees and , and plant- mutualisms.
Pronunciation
How to pronounce Phyllobaenus: /ˌfɪloʊˈbiːnəs/
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Identification
Phyllobaenus are distinguished from other clerid by their placement within the tribe Hydnocerini. Specific diagnostic features for the genus are not well documented in available sources. likely exhibit the characteristic color patterns typical of checkered beetles, though this varies among species.
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Habitat
vary by . P. obscurus has been documented in subterranean colonies in Pacific coastal plains. Other species likely occupy diverse environments including forests and woodlands where their occur.
Distribution
Documented from North America including Vermont and Mexico (Pacific coastal plains of Oaxaca). The likely has broader distribution given its , though specific range data for most is limited.
Diet
Varies by . P. obscurus is a of ( and pupae). Other species are likely predatory on wood-boring beetles or associated with other insect .
Host Associations
- Ectatomma ruidum sp. 3 - P. obscurus develops inside intact cocoons
- Ectatomma ruidum sp. 4 - P. obscurus develops inside intact cocoons
Life Cycle
P. obscurus: laid away from ; first-instar larva (triungulin) presumably phoretic for host location; larval development inside intact cocoon feeding on host /pupa; through round exit hole. details for other are not documented.
Behavior
P. obscurus exhibits extremely low (<0.6% of available cocoons). The first-instar larvae are likely phoretic, using transport to locate suitable . This represents the first recorded case of parasitoidism of ants.
Ecological Role
of ants in at least one ; potential agent though natural is extremely low. Other species likely function as of wood-boring insects or associates.
Human Relevance
Potential interest for research due to , though extremely low natural limits practical application. No other documented human interactions.
Similar Taxa
- Other Cleridae generaPhyllobaenus is distinguished by tribal placement (Hydnocerini) and specific ecological adaptations; most other clerids lack documented
More Details
Novel parasitoid discovery
The habit of P. obscurus represents a novel discovery for beetles, as no coleopteran had previously been recorded as parasitoid of ants. This finding was confirmed through direct observation of larvae inside cocoons, successful rearing to adulthood, and COI gene sequencing.
Prevalence data
estimate of <0.6% based on examination of 11,060 ants, 5,795 cocoons, and 2,185 larvae across 146 colonies of the Ectatomma ruidum .