Definition

Proper noun (Taxonomic rank): * Lagomorpha: An order of mammals that includes rabbits, hares, and pikas. Members of this order are characterized by having two pairs of incisor teeth in the upper jaw, one behind the other. They are primarily herbivorous and were once classified as a suborder within Rodentia.

Usage

• The term "order Lagomorpha" is used in scientific and zoological contexts to classify and discuss this specific group of mammals.
• It is often used when describing evolutionary relationships, anatomical features, or ecological roles distinct from rodents.

Examples

• The order Lagomorpha is distinct from rodents due to its unique dental structure.
• Scientists study the fossil record to understand the evolution of the order Lagomorpha.
• Rabbits and hares, both belonging to the order Lagomorpha, are found on every continent except Antarctica.

Advanced Usage

• In taxonomic hierarchy, "order Lagomorpha" sits below the class Mammalia and above various families (e.g., Leporidae for rabbits and hares, Ochotonidae for pikas).
• The defining synapomorphy (shared derived characteristic) for the order Lagomorpha is the presence of peg-like second incisors directly behind the larger first pair in the upper jaw.

Variants and Related Words

• Lagomorph (noun): A common name for any member of the order Lagomorpha.
  • The pika is a small lagomorph that lives in mountainous regions.
• Lagomorphic (adjective): Of or relating to the order Lagomorpha.
  • The researcher specialized in lagomorphic anatomy.

Synonyms

• Duplicidentata (obsolete taxonomic term): Formerly used as a suborder name for this group, referencing the double pair of upper incisors.

Different Meanings

• This term has a single, specific meaning in biological taxonomy. It does not have common idiomatic or figurative uses.

Noun

1. rabbits; hares; pikas; formerly considered the suborder Duplicidentata of the order Rodentia