unguiculata

Thân thiện

A squirrel uses its sharp unguiculata to climb a tree trunk.

Definition

Noun: 1. A former taxonomic group of mammals: In older biological classification systems, 'Unguiculata' was a major division or order of the class Mammalia. It comprised mammals characterized by having nails or claws on their digits, distinguishing them from hoofed mammals (ungulates) and aquatic mammals like whales (cetaceans).

Usage Notes

• Historical Term: The term 'Unguiculata' is primarily used in a historical or taxonomic context. It is not part of modern, phylogenetically-based mammalian classification.
• Distinguishing Feature: Its core definition hinges on the possession of unguiculate digits (bearing nails or claws). This feature was used to contrast it with other major groups.
• Capitalization: As a formal taxonomic name, it is typically capitalized: .

Examples

• In 19th-century zoology texts, insectivores, bats, and primates were often grouped within the Unguiculata.
• The now-obsolete order Unguiculata included mammals that were neither hoofed nor fully aquatic.

Advanced Usage

• Taxonomic Context: The term is used when discussing the history of biological classification or comparing older and newer systems of taxonomy.
  • Cuvier's classification placed rodents and edentates within the Unguiculata.

Variants and Related Words

• Unguiculate (adjective): Having or resembling nails or claws.
  • Primates are unguiculate mammals.
• Ungulate (noun/adjective): A hoofed mammal. This was the contrasting group to the Unguiculata.
  • Horses and cows are ungulates.

Synonyms

• (None that are precise, as it is a specific historical taxonomic name. In context, one might use descriptive phrases.)

Related Phrases/Concepts

• Former classification: Indicates the term's outdated status.
• Mammalian taxonomy: The broader field of study.
• Cladistics / Phylogenetics: The modern systems that replaced the type of classification that used groups like Unguiculata.

Học thuật

Noun

1. in former classifications a major division of Mammalia comprising mammals with nails or claws; distinguished from hoofed mammals and cetaceans

Từ đồng nghĩa

• unguiculata