Definition

Proper noun: * A taxonomic family within the order Primates: In biological classification, this family comprises the lesser apes, specifically gibbons and siamangs. It is sometimes classified as a subfamily within the family Pongidae (the great apes).

Usage

• The term is used in formal scientific contexts, specifically in zoology, taxonomy, and primatology, to categorize a specific group of primates.
• It is a singular, collective noun referring to the entire taxonomic group.

Examples

• Scientific Classification: "The agile gibbon belongs to the family Hylobatidae."
• Comparative Anatomy: "Members of the family Hylobatidae are distinguished by their long arms and lack of a tail."
• Taxonomic Discussion: "Some classifications place the family Hylobatidae within the superfamily Hominoidea, alongside the great apes."

Advanced Usage

• Taxonomic Hierarchy: The term is used within a fixed hierarchical system: Kingdom (Animalia) > Phylum (Chordata) > Class (Mammalia) > Order (Primates) > Family (Hylobatidae) > Genera (e.g., , ).
• Distinction from Pongidae: In some older or alternative classifications, Hylobatidae was considered a subfamily (Hylobatinae) of Pongidae. Modern taxonomy typically treats them as separate families.

Variants and Related Words

• Hylobatid (noun): A member of the family Hylobatidae; a gibbon or siamang.
  • Example: "The hylobatid swung gracefully through the canopy."
• Hylobatidae is the accepted, formal Latin name. Common names for its members include gibbon and siamang.

Synonyms

• Lesser apes: This is the common English name for the members of this family, contrasting with the "great apes" (family Hominidae).
• (In some classifications) Hylobatinae: When treated as a subfamily rather than a full family.

Noun

1. used in some classifications for the lesser apes (gibbons and siamangs); sometimes considered a subfamily of Pongidae