Anisolabididae

Verhoeff, 1902

Genus Guides

Anisolabididae is a of earwigs (order Dermaptera, suborder Neodermaptera) comprising 38 across 13 . Members include both and geographically restricted , with some showing specialized adaptations for subcortical or coastal . Several genera, particularly Euborellia, are recognized for their predatory and potential as agents of agricultural pests. The family exhibits diverse morphologies ranging from typical body plans to dorsoventrally flattened forms adapted for life under bark.

Euborellia annulipes by (c) RAP, some rights reserved (CC BY), uploaded by RAP. Used under a CC-BY license.

Euborellia annulipes by no rights reserved, uploaded by Jesse Rorabaugh. Used under a CC0 license.

Euborellia cincticollis by (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist. Used under a CC-BY license.

Pronunciation

How to pronounce Anisolabididae: /ˌænɪsəʊˌlæbɪˈdɪdiː/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Anisolabididae can be distinguished from other by combinations of genital, wing, and abdominal characteristics, though precise family-level diagnostic features require examination. Within the family, and are distinguished by forceps , wing development (brachypterous versus forms), and male genitalia structure. -level identification often requires examination of lobe morphology and paramere shape.

Images

Habitat

are diverse across the . Anisolabis maritima shows highest affinity to seashore environments. Euborellia inhabit open lands including agricultural fields, semi-urban grasslands, sandy seaside areas, and streamside areas. Platylabia major is an obligate inhabitant of subcortical spaces under loosened bark of dead trees, exhibiting a dorsoventrally flattened, paper-like body form. Some species are semi-, occurring in human-modified environments.

Distribution

distribution with strong representation in tropical, subtropical, and warm temperate regions. Documented from Africa, Asia-Tropical, Australia, and Europe. Specific distributions include: Canary Islands ( Canarilabis); East and Southeast Asia (Euborellia annulata, E. pallipes, E. philippinensis); Japan (Anisolabis maritima, Euborellia pallipes, Gonolabis marginalis); Australia (Titanolabis colossea); and introduced in European greenhouses (Euborellia arcanum in Germany and Austria).

Diet

Predatory; Euborellia annulata preys on Spodoptera frugiperda larvae in maize crops, with females showing greater ability than males. Euborellia annulipes and Marava arachidis consume multiple life stages of Spodoptera frugiperda including and larvae. Anisolabis maritima mothers provision offspring with food carried to soil burrows. Laboratory rearing has used commercial cat food, though natural dietary breadth across the remains incompletely documented.

Life Cycle

Females of Anisolabis maritima construct soil burrows and progressively provision nymphs. Euborellia can be laboratory reared at 26±1°C with 12-hour ; nymphs separated every three days to obtain virgin . Some Euborellia species produce both brachypterous ( tegmina as small oval flaps, no hindwings) and (fully developed tegmina and wings) forms, with wing observed in laboratory conditions.

Behavior

Maternal care documented in Anisolabis maritima: mothers recognize offspring presence and hunger level, carrying more food to of hungrier nymphs. Euborellia annulipes males exhibit , though they consume smaller proportions of eggs they have sired, suggesting kin discrimination. Platylabia major exhibits constrained mating posture requiring thin spaces sandwiched by two planes for genital coupling; males use both right and left for insemination with no lateral . Reproductive isolation is complete among sympatric Euborellia due to post-copulatory barriers.

Ecological Role

of agricultural pests, particularly noctuid larvae. Euborellia annulata and E. annulipes function as agents of Spodoptera frugiperda in maize agroecosystems. Subcortical such as Platylabia major contribute to decomposition processes in dead wood . Some species serve as for associated mites (Histiostomatidae documented on Gonolabis marginalis and Titanolabis colossea).

Human Relevance

Several are evaluated or employed as agents in agricultural systems, particularly for management of Spodoptera frugiperda in maize. Euborellia arcanum has been introduced to European greenhouses, likely via plant material from Florida. Some species are semi- and occur in human-modified environments. No documented medical or economic negative impacts.

Similar Taxa

ForficulidaeBoth are within Dermaptera; Forficulidae typically have more robust body forms and different male genitalia structure, with many showing more pronounced in forceps than most Anisolabididae.
SpongiphoridaeSpongiphoridae includes with similar subcortical habits, but members such as Nesogaster amoenus and Paralabellula curvicauda have thicker, less flattened bodies and can mate on single horizontal planes due to greater abdominal flexibility, unlike the constrained posture of Platylabia major.

More Details

Wing polymorphism

Multiple Euborellia exhibit wing , with brachypterous forms having tegmina as small oval flaps and no hindwings, while forms possess fully developed tegmina and wings. This polymorphism can occur within single species and has complicated species-level .

Fossil record

The extinct †Toxolabis was described in 2014 from Burmese amber (Cretaceous), with T. zigrasi matching Anisolabididae characteristics though precise placement could not be determined. Additional fossil genera Cretolabia and Cratoborellia are known from the Aptian-aged Crato Formation of Brazil.

Cryptic diversity

Molecular studies have revealed substantial cryptic diversity within morphologically similar . Canarilabis maxima was found to comprise three distinct species across different Canary Islands, and Euborellia species in East and Southeast Asia required combined morphological, reproductive isolation, and studies for accurate delineation.