Definition

Noun 1. An insect that causes plant galls: Any of various small insects (especially certain wasps, flies, or aphids) that lay their eggs in plant tissues. The plant's reaction to the eggs or developing larvae forms an abnormal growth called a gall, which provides food and shelter for the larvae. 2. A specific type of gall-producing fly: Refers specifically to fragile, mosquito-like flies (family Cecidomyiidae) whose larvae induce the formation of plant galls. 3. A specific type of gall-producing wasp: Refers specifically to small, solitary wasps (family Cynipidae) that produce characteristic galls, especially on oaks and roses.

Usage Examples

• The oak tree's leaves were covered in bumps, a clear sign of infestation by a gallfly.
• The biologist studied the life cycle of the gallfly, from egg deposition to the emergence of the adult from the gall.
• Different species of gallfly produce galls of unique shapes and sizes on specific host plants.

Advanced Usage

• As a collective term: In entomology, "gallfly" can be used as a general term for any gall-making insect, though it more precisely refers to members of the fly family Cecidomyiidae or the wasp family Cynipidae.
  • The complex relationship between the gallfly and its host plant is an example of specialized parasitism.

Variants and Related Words

• Gall wasp (n): A more precise term for a gall-producing wasp, especially of the family Cynipidae.
• Gall midge (n): A more precise term for a gall-producing fly of the family Cecidomyiidae.
• Gall-maker (n): A general term for any insect or mite that causes the formation of plant galls.
• Cynipid (n/adj): Relating to or being a gall wasp of the family Cynipidae.

Synonyms

• Gall wasp
• Gall midge
• Gall-maker (general)

Related Concepts

• Gall (n): The abnormal plant growth or swelling caused by the activity of a gallfly or other organism.
• Cecidology (n): The study of plant galls and the organisms that cause them.

Noun

1. any of various insects that deposit their eggs in plants causing galls in which the larvae feed
2. fragile mosquito-like flies that produce galls on plants
3. small solitary wasp that produces galls on oaks and other plants