archaeornithes

Thân thiện

A scientist carefully examines an archaeornithes fossil in a museum.

Definition

Noun 1. Archaeornithes: A taxonomic subclass of primitive, extinct birds from the Mesozoic Era (primarily the Jurassic and early Cretaceous periods). These birds are characterized by having reptilian skeletal features, such as a long bony tail and teeth, which distinguish them from modern birds.

Usage

• The term is used in scientific and paleontological contexts to classify and discuss the earliest known groups of birds in the evolutionary lineage.
• It functions as a proper noun (capitalized) when referring to the formal taxonomic subclass name.

Examples

• Noun:
  • Fossils of the Archaeornithes provide crucial evidence for the dinosaurian origin of birds.
  • The Archaeornithes are distinguished from modern birds by the presence of a long, bony tail.
  • Scientists study the Archaeornithes to understand the transition from reptiles to birds.

Advanced Usage

• The subclass Archaeornithes is often contrasted with the subclass Neornithes, which contains all modern birds.
• In modern cladistic taxonomy, the term is less frequently used, with many of its members now classified within the group Avialae.

Variants and Related Words

• Archaeornithine (adj): Of or relating to the Archaeornithes.
  • The specimen showed clear archaeornithine characteristics.

Synonyms

• Primitive birds
• Ancient birds
• Mesozoic birds

Different Meanings

• There are no other common meanings for this word. It is a specific scientific term.

Related Idioms/Phrases

• This is a highly specialized scientific term and is not used in idiomatic expressions.

Học thuật

Noun

1. primitive reptile-like fossil birds of the Jurassic or early Cretaceous

Từ đồng nghĩa

• Archaeornithes
• subclass Archaeornithes