actinozoa

Thân thiện

A sea anemone, a type of actinozoa, sways gently on a coral reef.

Definition

1. Noun:
   • A taxonomic class of marine animals: Actinozoa refers to a large class of sedentary marine coelenterates (cnidarians) characterized by a polyp form, including organisms such as sea anemones and corals. In this class, the medusoid (free-swimming jellyfish) stage in the life cycle is entirely absent or suppressed.

Usage Examples

• Noun:
  • The vibrant reef was built by various species of actinozoa.
  • Biologists study actinozoa to understand coral reef ecosystems.

Advanced Usage

• In taxonomic context: The term "Actinozoa" is used in scientific classification, though it is sometimes considered synonymous with or replaced by the class Anthozoa in modern taxonomy.
  • The fossil record provides evidence for early actinozoa.

Variants and Related Words

• Anthozoa (n): The modern taxonomic class name that largely corresponds to the historical group Actinozoa.
  • Sea pens and blue corals are members of Anthozoa.
• Actinozoan (n/adj): Pertaining to or a member of the Actinozoa.
  • The actinozoan polyp is a fundamental body plan.

Synonyms

• Anthozoans: Marine cnidarians that are exclusively polypoid.
• Corals and anemones: Common names for prominent members of this group.

Related Phrases

• Sedentary marine life: A descriptive phrase for the lifestyle of actinozoa.
• Polyp phase: Refers to the dominant life stage of actinozoa, as opposed to a medusa phase.

Học thuật

Noun

1. a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed

Từ đồng nghĩa

• Anthozoa
• class Anthozoa
• Actinozoa
• class Actinozoa