Euborellia annulipes

Distinguished from other earwigs by the ringed or annulated pattern on the legs. The specific epithet 'annulipes' directly refers to this characteristic. Differentiated from Euborellia cincticollis and other congeners by leg pattern and geographic distribution. In the Canary Islands, found specifically within cut banana stems at advanced decomposition stages.

Medium-sized earwig with characteristic ringed or banded legs, giving rise to its common name. Body form typical of Anisolabididae with well-developed forceps-like cerci at the abdomen tip. Coloration generally dark. Sexual dimorphism present in forceps structure.

Agricultural environments including banana groves (Musa acuminata), cornfields, and peanut crops. In banana systems, shelters inside cut banana stems at advanced stages of decomposition during daytime hours (12:00–17:00). Also found in lowland agricultural areas with subtropical-Mediterranean climate interspersed with remnants of natural sub-desert shrubby vegetation. Occupies moist soil environments and has been observed in compost and decaying organic matter.

Cosmopolitan distribution due to human-mediated introduction. Documented in Canary Islands (La Palma, specifically Breña Baja and Puntallana at 75–200 m elevation), Israel, Brazil, and numerous European, American, and Australasian countries. Probable native range in Mediterranean region or East Africa. Distribution records from Azores islands (Corvo, Faial, Flores, Graciosa, Pico).

In seasonal climates, nymphs hatching in early August complete development in 30–40 days and oviposit before winter onset. Egg laying ceases in winter and resumes in spring. Nymphs hatching in September mature the following spring. Under constant warm conditions (32°C), development and oviposition continue year-round with four generations annually.

Predatory, feeding on insect eggs and larvae. Documented consumption of Spodoptera frugiperda (fall armyworm) eggs and larvae, including advanced instars. In laboratory settings, feeds on peanut pods. Handling time for different prey stages ranges from approximately 2 to 3 minutes.

Four nymphal instars. At 28–30°C, instar durations are approximately 10, 10, 16, and 16 days respectively. Total nymphal development lasts 30–280 days depending on temperature (18–34°C range). No development occurs below 14°C. Thermal threshold for nymphal development approximately 16.2°C with thermal constant of about 520 day-degrees Celsius. Egg incubation period 6–22 days at 18–34°C, with threshold of 12.5°C and thermal constant of 126–130 day-degrees Celsius. Hatching success 73–85% at 20–32°C.

Females exhibit sedentary behavior associated with parental care of eggs and early nymphs, making them vulnerable to local disturbances such as pesticide application. Males are more mobile and show no differential response to farming systems. Males frequently cannibalize eggs but can distinguish their own offspring from unrelated eggs, reducing cannibalism of sired clutches. Adults shelter in cut banana stems during peak daytime hours. Ovariectomy studies indicate that juvenile hormone production cycles are independent of ovarian presence, and that mating enhances maternal behavior and reduces feeding late in the reproductive cycle.

Natural biological control agent (beneficial predator) in agricultural ecosystems. Significant predator of lepidopteran pests including Spodoptera frugiperda. Contributes to pest suppression in banana groves, cornfields, and peanut crops. Higher abundance in organic farming systems compared to conventional agriculture.

Important natural biological control agent in integrated pest management systems. Used or encouraged in banana, corn, and peanut production for pest suppression. Subject of research regarding non-target effects of transgenic crops (Bt maize). In some contexts, considered a minor pest of stored products or when damaging peanut pods by gnawing holes. Adults may enter buildings in fall seeking winter shelter in some regions.

• Euborellia cincticollisCongener with similar biology; comparative studies exist but E. cincticollis lacks the distinctive ringed legs of E. annulipes
• Marava arachidisCo-occurring earwig predator with similar ecological role and comparable effectiveness in consuming Spodoptera frugiperda; distinguished by morphology and behavior
• Forficula auriculariaCommon European earwig in same order but different family (Forficulidae); lacks ringed legs and exhibits different parental care patterns

• earwig
• biological control
• predator
• agricultural pest management
• parental care
• egg cannibalism
• Dermaptera
• Anisolabididae
• integrated pest management
• Spodoptera frugiperda
• banana
• corn
• peanut

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Encyrtid Holdings | Entomology Research Museum
• Bug Eric: Picture-winged Flies
• Biology of the African earwig,Euborellia cincticollis(Gerstaecker) in California and comparative notes onEuborellia annulipes(Lucas)
• Organic Farming Shapes Population Dynamics and Genetic Diversity of Euborellia annulipes in Banana Groves
• Paternity and egg cannibalism in the ringlegged earwig Euborellia annulipes (Dermaptera: Anisolabididae)
• FMRFamide‐like material in the earwig, Euborellia annulipes, and its functional significance
• Bionomics and Ecology of the Earwig Anisolabis (Euborellia) annulipes Luc. (Labiduridae‐Dermaptera) in Israel1
• Consumption and handling time of Euborellia annulipes and Marava arachidis (Dermaptera: Anisolabididae) on Spodoptera frugiperda (Lepidoptera: Noctuidae)
• The effect of ovariectomy on reproductive behaviour and physiology of adult female ring‐legged earwigs, Euborellia annulipes
• Effects of Transgenic Maize DBN9936 (Cry1Ab+EPSPS) and Maize Borer Feeding on Non-Target Organism Euborellia annulipes Lucas (Dermaptera: Anisolabididae).