family Limulidae

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Definition

Noun: - Family Limulidae: A biological family within the class Merostomata, comprising the horseshoe crabs. These are marine arthropods known for their hard, horseshoe-shaped carapace and long, pointed tail spine (telson). They are often considered "living fossils."

Usage Examples
  • Noun:
    • The family Limulidae includes all extant species of horseshoe crabs.
    • Scientists study the family Limulidae to understand arthropod evolution.
Advanced Usage
  • In taxonomic hierarchy, family Limulidae is a formal classification rank.
    • The genus Limulus is placed within the family Limulidae.
Variants and Related Words
  • Limulidae (n): The standard, unabbreviated form of the taxonomic family name.
    • Limulidae are not true crabs but are more closely related to spiders and scorpions.
  • Limulid (n/adj): A member of the family Limulidae; pertaining to this family.
    • The limulid's blood is blue due to the presence of copper-based hemocyanin.
Synonyms
  • Horseshoe crab family: A common descriptive synonym.
    • The horseshoe crab family has survived for hundreds of millions of years.
Related Terms (Not Phrasal Verbs or Idioms)
  • Merostomata: The class to which the family Limulidae belongs.
  • Xiphosura: The order often used synonymously with Limulidae in some classifications.
  • Limulus: The best-known genus within this family (e.g., , the Atlantic horseshoe crab).
Noun
  1. horseshoe crabs

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