Definition

Noun: A taxonomic suborder within the order Decapoda, comprising the true crabs. Members of this suborder are characterized by having a short, broad carapace (shell) and a greatly reduced abdomen that is typically folded tightly beneath the cephalothorax, giving them a distinctive, compact shape.

Usage

The term "Suborder Brachyura" is used in formal scientific classification (taxonomy) and zoological contexts to refer specifically to the group of crustaceans known as true crabs, distinguishing them from other crab-like decapods.

Examples

• Scientific Context:
  • The Suborder Brachyura includes familiar species like the blue crab and the Japanese spider crab.
  • Researchers studied the evolutionary history of the Suborder Brachyura.

Advanced Usage

• The name "Brachyura" is derived from Greek, meaning "short tail," which directly references the reduced, hidden abdomen.
• In taxonomic hierarchy, it is written as Suborder Brachyura. The group is further divided into various sections and families.

Variants and Related Words

• Brachyuran (noun/adjective): A member of the Suborder Brachyura; of or relating to this suborder.
  • The brachyuran's abdomen is folded under its body.
• True crab (noun): A common name for any member of the Suborder Brachyura.

Synonyms

• True crabs
• Brachyurans

Related Terms

• Decapoda: The larger order to which Brachyura belongs, which also includes shrimp, lobsters, and hermit crabs.
• Anomura: A related suborder of decapods, often called "false crabs" or "crab-like decapods" (e.g., hermit crabs, king crabs), which have a less reduced abdomen not permanently folded under the body.

Noun

1. an order of crustaceans (including true crabs) having a reduced abdomen folded against the ventral surface