Phylum Arthropoda

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Last updated: April 29, 2026

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Hint	Answer
All arthropods share this trait with annelids	metamerism
This subphylum is named for arthropods whose first appendages are their chelicerae	Chelicerata
Only living group in the Class Merostomata	Xiphosura
Common name of above	horseshoe crab
This limb on the horseshoe crab can help determine whether it is male or female	pedipalp
Name the four adaptations arachnids had to adopt to become terrestrial	waxy epicuticle
same question as above	book gills to lungs and trachea
same question as above	appendages
same question as above	ability to produce silk, venom, etc.
What is the purpose of chelicerae?	feeding
What is the purpose of pedipalps	reproduction
What class do the Pantopoda (sea spiders) fall under?	Pycogonida
In what unique place does a female sea spider keep her ovary	in her femur
This subphylum is named for arthropods whose first appendages are their mandibles	Mandibulata
Which class name comes from the Latin words for "many feet"	Myriapoda
Common name for the Chilopoda	centipedes

Hint	Answer
Common name for the Diplopoda	millipedes
Name the only sessile type of crustacean	barnacle
What is the name for a crustacean larva?	Naupilus
How many pairs of antennae do crustaceans have?	2
How many pairs of head appendages do crustaceans primitively have?	5
How many pairs of thoracic appendages do crustaceans primitively have?	8
How many pairs of abdominal appendages do crustaceans primitively have?	6
What are crustacean appendages that gives them an endopod and an exopod?	biramous
Name the orders of Class Malacostra	Decapoda
same question as above	Stomatopoda
same question as above	Euphausicea
same question as above	Mysidacea
How many legs does an insect have	6
Name for primitively winged insects	Pterygota
Name for primitively non-winged insects (i.e. silverfish)	Apterygota
What are insect wings made of?	chitin