Glossary of entomology terms

Butterfly parts

Rove Beetle sp.^ Staphylinidae - Flickr - gailhampshire

Antennae ctb

Distinction between clavate and capitate anatomy of insect antennae

Antenna clavate

Butterfly wing terms

Glossary of Entomology Terms is a comprehensive list that encompasses the terminology used within the field of entomology, the study of insects. This glossary serves as a fundamental resource for professionals, students, and enthusiasts alike, providing definitions and explanations for terms and concepts encountered in entomological research, literature, and documentation.

A

• Abdomen - The posterior part of an insect's body, located behind the thorax, containing the digestive and reproductive organs.
• Antenna - A sensory appendage on the head of an insect, used for smelling, feeling, and sometimes hearing.
• Apterous - Referring to insects without wings.

B

• Bioluminescence - The production and emission of light by a living organism, as seen in some species of insects like fireflies.
• Bivoltine - Describes insects that have two generations per year.

C

• Chitin - A large, structural polysaccharide found in the exoskeletons of insects.
• Cocoon - A protective casing spun by the larvae of many insects for use as a pupal chamber.
• Compound eye - An eye consisting of numerous small visual units, common in insects.

D

• Diapause - A period of suspended development in insects, allowing them to survive adverse conditions.

E

• Ecdysis - The process of molting or shedding the exoskeleton in insects.
• Entomology - The scientific study of insects, a branch of zoology.

F

• Fecundity - The reproductive capacity of an individual, including the ability to produce viable offspring.

G

• Grub - The larval stage of certain insects, particularly beetles.

H

• Hemolymph - The blood equivalent in insects, circulating nutrients and hormones throughout the body.
• Holometabolism - Complete metamorphosis, a developmental process in some insects that includes distinct larval, pupal, and adult stages.

I

• Instar - A developmental stage of arthropods, such as insects, between each molt until sexual maturity is reached.

L

• Larva - The juvenile form of an insect, often differing markedly from the adult form.

M

• Metamorphosis - The process of transformation from an immature form to an adult form in two or more distinct stages.

N

• Nymph - The immature form of some insects, which resembles the adult form but is smaller and lacks fully developed wings.

O

• Ovipositor - A structure used by some female insects to lay eggs.

P

• Pheromone - A chemical substance produced and released into the environment by an animal, affecting the behavior or physiology of others of its species.
• Proboscis - A long, flexible feeding and sucking organ present in some insects, such as butterflies and moths.

R

• Rostrum - A snout or beak, especially one used by certain insects to pierce plant tissues to suck out the sap.

S

• Sclerite - A hardened body part or plate forming part of the exoskeleton in arthropods, including insects.
• Spiracle - An external respiratory opening in insects, found on the abdomen and thorax.

T

• Thorax - The middle part of an insect's body, bearing the legs and wings.

V

• Venation - The arrangement of veins in an insect's wing.

Z

• Zoology - The scientific study of animals, including insects.