brachyuran

Thân thiện

A brachyuran scuttles sideways across the sandy ocean floor.

Definition

Noun A brachyuran is a typical crab, specifically a decapod crustacean of the infraorder Brachyura, characterized by a short, broad, and flattened body (carapace), a greatly reduced abdomen curled beneath the thorax, and the first pair of legs modified into strong pincers (chelae).

Usage

The term "brachyuran" is a formal, scientific word used primarily in zoology, marine biology, and taxonomy to categorize and describe true crabs, distinguishing them from other crab-like crustaceans (e.g., hermit crabs, king crabs).

Examples

• The common shore crab, , is a well-studied brachyuran.
• Most species found in the crab trap were brachyurans, identifiable by their short abdomens tucked underneath.
• The study focused on the larval development of various brachyuran families.

Advanced Usage

• The term is often used attributively (as an adjective) to describe features or groups: "brachyuran morphology," "brachyuran crabs," "the brachyuran clade."
• In evolutionary biology, discussions about the radiation of decapods frequently reference the success of the brachyuran body plan.

Variants and Related Words

• Brachyura (noun, plural): The scientific infraorder name to which all brachyurans belong.
• Brachyurous (adjective): Having the characteristics of a brachyuran; short-tailed.

Synonyms

• True crab
• Short-tailed crab (descriptive synonym)

Antonyms

• Anomuran (a crab-like decapod of a different infraorder, e.g., hermit crab, porcelain crab)
• Macruran (a long-tailed decapod, e.g., lobster, shrimp)

Học thuật

Noun

1. typical crabs