Ozaena lemoulti
Bänninger, 1932
Ozaena lemoulti is a carabid in the Paussinae with an obligate myrmecophilous lifestyle across all stages. Molecular gut content analysis confirms that exclusively prey on Camponotus ants, using specialized piercing-sucking feeding rather than typical carabid crushing. First instar larvae are morphologically modified for life within nests, possessing long running legs and lacking the burrow-dwelling adaptations found in other ozaenines. This represents an independent evolutionary origin of myrmecophily within Paussinae, distinct from the tribe Paussini.
Pronunciation
How to pronounce Ozaena lemoulti: /oʊˈzeɪnə ləˈmʊlti/
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Identification
Distinguished from non-myrmecophilous ozaenines by ecological association with nests rather than individual soil burrows. Larvae identified by long running legs and lack of burrow-constructing . may be recognized by association with Camponotus ants and riparian oak , though specific diagnostic morphological characters for field identification are not detailed in available sources.
Habitat
Riparian oak woodlands, specifically associated with large Emory oak (Quercus emoryi) trees containing hollow trunks and dead branches. Also recorded from sycamore trees. found on bark of Emory oaks and occasionally at mercury vapor lights. Northernmost at 1214m elevation in Walker Canyon, Arizona.
Distribution
New World tropics from southern Arizona to northern Argentina. Northernmost records from Walker Canyon, Santa Cruz County, Arizona (31°22.819'N 111°03.994'W). GBIF records additionally document presence in Brazil, Rica, French Guiana, and Nicaragua.
Diet
: exclusively Camponotus ants, confirmed by molecular gut content analysis. Larvae: hypothesized to feed on soft, lightly sclerotized prey such as based on mouthpart ; direct observations of larval feeding have not been reported.
Host Associations
- Camponotus ocreatus - most likely for larvae based on field association patterns and captive feeding response
- Camponotus ants - preyconfirmed prey by molecular gut content analysis
Life Cycle
Holometabolous. to first instar development approximately one month in captivity. Eggs laid singly; egg lacks internal air layer present in non-myrmecophilous relatives, suggesting for oviposition within nests. Larvae develop within ant nests rather than constructing individual burrows. details unknown for this .
Behavior
feeding: uses sharp to pierce prey and suck fluids, rather than crushing as in typical carabid . Larval : highly mobile within ant nests using long legs for running; lacks burrow-constructing behavior and trap-door ambush strategy typical of other ozaenine larvae. Adults not attracted to blacklights, suggesting specialized -searching behavior rather than general .
Ecological Role
Specialized of Camponotus ants; nest within colonies. Contributes to diversity of -ant associations as an independent evolutionary origin of myrmecophily within Paussinae.
Similar Taxa
- Goniotropis kuntzeniNon-myrmecophilous ozaenine relative with burrow-dwelling larvae; O. lemoulti differs in larval (long running legs vs. short legs) and ( nest inhabitant vs. individual soil burrow). morphology also differs: O. lemoulti lacks internal air layer present in G. kuntzeni eggs.
- PaussiniTribe within Paussinae containing other myrmecophilous beetles; O. lemoulti represents independent evolutionary origin of myrmecophily in tribe Ozaenini, distinct from Paussini.
More Details
Evolutionary significance
Ozaena lemoulti demonstrates of myrmecophily within Paussinae, representing a separate origin from the well-studied myrmecophilous tribe Paussini. This makes it valuable for comparative studies of - .
Research methods
Molecular gut content analysis using 18S rDNA sequencing provided direct confirmation of diet, representing a methodological advance for studying specialized in elusive beetles.