Entomology Glossary

Paired sensory appendages on the insect head used for detecting odors, vibrations, temperature, humidity, and in some species, touch and taste.

Warning coloration or signals displayed by organisms to advertise toxicity or unpalatability to potential predators.

A structural polysaccharide that forms the main component of insect exoskeletons and fungal cell walls.

Reciprocal evolutionary change between interacting species driven by mutual selection pressures.

The insect order comprising beetles, the most species-rich order of insects with over 400,000 described species.

Endocrine glands in the insect head that produce juvenile hormone, regulating metamorphosis and reproduction.

A set of adaptations allowing an organism to avoid detection, including camouflage, background matching, and resemblance to inert objects.

A state of hormonally mediated dormancy triggered by environmental cues, enabling insects to survive adverse conditions.

The process of shedding the old exoskeleton during molting, allowing growth to the next developmental stage.

Hardened, thickened forewings characteristic of beetles (Coleoptera) that serve as protective covers for the membranous hindwings.

The practice of eating insects as food, practiced by many human cultures and increasingly studied as a sustainable protein source.

The highest level of social organization, characterized by cooperative brood care, overlapping generations, and reproductive division of labor.

The external skeleton of insects, composed of chitin and proteins, providing structural support, protection, and a barrier against desiccation.

The circulatory fluid in insects that bathes organs in an open circulatory system, transporting nutrients and immune factors but not oxygen.

A developmental stage of an insect larva or nymph between two successive molts.

The insect order comprising butterflies and moths, characterized by scale-covered wings and a coiled proboscis in adults.

Excretory organs in insects that filter waste from hemolymph and regulate water and ion balance.

The biological process of transformation in an insect's life cycle, from immature forms to the adult stage.

A tubular structure used by female insects to deposit eggs, sometimes modified for cutting, piercing, or stinging.

An organism, typically a wasp or fly, whose immature stage develops on or in a host organism, inevitably killing it.

A chemical substance released by an organism that elicits a specific response in another individual of the same species.

An elongated mouthpart structure used for feeding, such as the coiled tongue of butterflies or the piercing stylets of mosquitoes.

The chemical hardening and darkening of insect cuticle through cross-linking of proteins with quinones.

An external opening of the tracheal respiratory system in insects, usually located along the lateral sides of the thorax and abdomen.

An organism, typically an arthropod, that transmits a pathogen from one host to another without itself being affected by the disease.