Brachynemurini

Brachynemurini antlions can be distinguished from other myrmeleontine tribes by their elongated, slender abdomens that extend well beyond the wing bases, giving rise to the common name 'long-tailed antlions.' Adults typically have long, narrow wings with reduced or simplified venation compared to some other antlion groups. The antennae are generally short and clubbed. Larvae construct pit traps in sandy or loose soil for prey capture, though specific larval diagnostic features for the tribe remain poorly documented.

The tribe is predominantly distributed in the Americas. Genera occur from the United States through Mexico and Central America to South America, including Argentina, Peru, Venezuela, and Ecuador. The genus Galapagoleon is endemic to the Galápagos Islands. Several genera are restricted to specific regions: Venezueleon and Ecualeon to Venezuela and Ecuador respectively, while others like Brachynemurus and Scotoleon have broader North American distributions.

Life cycle follows the complete metamorphosis typical of Neuroptera: egg, larva, pupa, and adult. Larvae are predatory, constructing conical pit traps in loose substrate to capture small arthropods. Pupation occurs in a silken cocoon formed in soil or sheltered locations. Specific developmental durations and voltinism patterns are not documented for most species.

Adults are primarily crepuscular or nocturnal, often attracted to lights. Larvae are sit-and-wait predators that remain motionless at the bottom of their pit traps, flicking sand or debris to dislodge prey that falls into the trap. This ambush hunting strategy is characteristic of the family but specific behavioral variations within Brachynemurini have not been systematically studied.

As larvae, members function as predators of small soil-dwelling arthropods, potentially regulating populations of ants and other insects. Adults may serve as prey for birds, bats, and other insectivores. Their role as ecosystem engineers through pit trap construction affects soil surface microtopography and nutrient distribution, though specific ecological studies on Brachynemurini are lacking.

Adults are occasionally encountered at lights by entomologists and naturalists. The tribe has no documented economic importance as pests or beneficial organisms. Some species have been subjects of taxonomic and biogeographic research due to their distribution patterns in the Americas.

• MyrmeleontiniAnother tribe in subfamily Myrmeleontinae; Brachynemurini distinguished by more elongated abdomen and generally more slender body form, though definitive separation requires examination of wing venation and genitalia.
• DendroleontiniTribe in Myrmeleontinae with adults that often have broader wings and more robust bodies; larvae of Dendroleontini frequently hunt on tree trunks or under bark rather than constructing pit traps in soil.

• antlions
• Neuroptera
• Myrmeleontidae
• predatory larvae
• pit traps
• Americas
• nocturnal

• BugGuide
• Wikipedia
• iNaturalist taxon