Berothidae

Handlirsch, 1906

Beaded Lacewings

Genus Guides

1

The are a of Neuroptera known as , first described by Anton Handlirsch in 1906. The family comprises 24 and approximately 110 living with a discontinuous worldwide distribution concentrated in tropical and subtropical regions. Their remains poorly documented, though larvae of at least some species are specialized of . The family exhibits considerable fossil diversity dating from the Late Jurassic, with numerous extinct genera described.

Pronunciation

How to pronounce Berothidae: /bɛˈrɒθɪdiː/

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Identification

are distinguished from other neuropteran by a combination of wing venation characters and the presence of bead-like cuticular structures. They differ from mantidflies (Mantispidae) in lacking forelegs. They differ from green lacewings (Chrysopidae) and brown lacewings (Hemerobiidae) by the beaded wing or body structures that give the family its . Precise identification to or requires examination of wing venation, genitalia, and other microscopic characters.

Habitat

Most occur in tropical and subtropical regions. The few documented associations include Brazilian Cerrado savanna for Spiroberotha tocantinensis and temperate forest environments for Lomamyia latipennis in western North America. Specific microhabitat preferences for most species are unknown.

Distribution

Discontinuous worldwide distribution with concentrations in tropical and subtropical regions. Documented occurrences include: North America (western United States and Canada), Central America ( Rica), South America (Venezuela, Colombia, Brazil), the Palearctic (Afghanistan, Pakistan, Thailand), and from Cretaceous amber deposits in Myanmar. The distribution is notably patchy with large geographic gaps between known .

Diet

Larval stages are predatory. First and third instars of Lomamyia latipennis have and feed on the Zootermopsis angusticollis. The second instar of this is apparently non-feeding. feeding habits are unknown for most species.

Host Associations

Life Cycle

Based on Lomamyia latipennis: laid in stalked clusters with fewer stalks than eggs; 7 days. Three larval instars: first instar duration 12.5 days, second instar 3 days (non-feeding, hanging posture), third instar median duration 20.8 days. in oval, transparent cocoon; after 20 days in cocoon. Developmental timing varies with temperature. High mortality observed in laboratory rearing suggests conditions may be suboptimal.

Behavior

First and third instar larvae are highly mobile active . Second instar larvae of Lomamyia latipennis hang motionless by the abdominal tip in a C-shaped posture; when disturbed, the body snaps to straight position then returns to C-shape. This may represent a defensive response or mechanism. behaviors are largely unrecorded.

Ecological Role

Larvae function as , with documented suggesting potential role in regulating subterranean termite . The extent of their ecological impact is unknown due to limited study and apparent rarity of many .

Human Relevance

No documented economic importance. Potential as agents for has been suggested but not developed. Occasionally encountered in amber deposits of interest to paleontologists.

Similar Taxa

  • MantispidaeMantidflies possess forelegs similar to praying mantises; lack such modified forelegs and have distinct beaded wing or body structures.
  • ChrysopidaeGreen lacewings have similar general neuropteran wing venation but lack the bead-like structures characteristic of and typically have golden .
  • HemerobiidaeBrown lacewings are generally smaller, lack beaded structures, and have different wing venation patterns.
  • RhachiberothidaeThorny lacewings share beaded characteristics and were historically confused with ; they possess distinctive thorn-like projections and different wing venation.

More Details

Fossil Record

Extensive fossil diversity known from the Late Jurassic onward, with numerous extinct described from Cretaceous amber deposits including Myanmar (Burmese) amber. The fossil record includes basal and incertae sedis genera not assignable to extant lineages.

Taxonomic Uncertainty

The 's is poorly known; most information derives from a single study of Lomamyia latipennis. Generalization to other berothid is not justified without further study. High mortality in laboratory rearing of this species indicates that published life history data may reflect suboptimal conditions rather than natural .

Sources and further reading