sirenia

Thân thiện

A manatee, a member of the order Sirenia, swims peacefully in a clear blue sea.

Definition

Noun 1. An order of aquatic mammals: Sirenia is the scientific name for the biological order comprising large, fully aquatic, herbivorous marine mammals. This order is characterized by a robust, cylindrical body, paddle-like forelimbs, no hind limbs, a flat tail used for propulsion, and a slow-moving, grazing lifestyle in warm coastal waters, estuaries, and rivers.

Usage

• The order Sirenia is often referred to as "sea cows" due to their grazing behavior.
• Marine biologists study the fossils of early Sirenia to understand their evolution from land mammals.
• All extant species within Sirenia are considered vulnerable or endangered.

Advanced Usage

• In taxonomic classification: The term is used formally in scientific literature to group manatees and dugongs based on shared anatomical and genetic characteristics.
  • The fossil record places the emergence of the order Sirenia in the early Eocene epoch.

Variants and Related Words

• Sirenian (noun): A member of the order Sirenia; a manatee or dugong.
  • The Florida manatee is a well-known sirenian.
• Sirenian (adjective): Of or relating to the order Sirenia.
  • They conducted a study on sirenian population dynamics.

Different Meanings / Contexts

This word has a single, specific scientific meaning as a taxonomic order in biology. It does not have common alternative definitions.

Synonyms

• Sea cows (This is a common name for the group, not a scientific synonym.)

Related Idioms or Phrases

There are no common idioms or phrasal verbs associated with this specific scientific term.

Học thuật

Noun

1. an animal order including: manatees; dugongs; Steller's sea cow

Từ đồng nghĩa

• Sirenia
• order Sirenia