coarctate

Thân thiện

The butterfly emerges from its coarctate pupa.

Definition

1. Adjective:
   • (Entomology) Enclosed in a rigid case: Describes an insect pupal stage where the developing insect is tightly enclosed within a hardened, often barrel-shaped, case formed from the last larval skin. This case is not shed until the adult insect emerges.

Usage Examples

• Adjective:
  • The coarctate pupa of a fly remains protected within its puparium.
  • In this species, the larval skin hardens to form a coarctate case around the pupa.

Advanced Usage

• Scientific Description: The term is almost exclusively used in technical entomological contexts to classify and describe pupal types, contrasting with "exarate" pupae (where the appendages are free) or "obtect" pupae (enclosed in a case but not specifically by the hardened larval skin).
  • The coarctate form is an adaptation that provides excellent protection from desiccation and predators.

Variants and Related Words

• Coarctation (noun): The act of compressing or constricting; a state of being pressed together. In medicine, it refers to a narrowing, such as coarctation of the aorta.
  • The coarctation of the vessel required surgical intervention.

Synonyms

• Encased: Enclosed in or as if in a case.
• Ensheathed: Enclosed in a protective covering.

Antonyms

• Exarate: (Of a pupa) Having the legs, wings, and other appendages free and not glued to the body.
• Free: Not confined or enclosed.

Học thuật

Adjective

1. (of an insect pupa) enclosed in a rigid case