Crustacea

E96843

subphylum taxon

Crustacea is a large subphylum of mostly aquatic arthropods that includes crabs, lobsters, shrimp, barnacles, and related species characterized by hard exoskeletons and jointed limbs.

Statements (64)

Predicate	Object
instanceOf	subphylum → taxon →
bodyDivision	abdomen → head → thorax →
circulatorySystem	open circulatory system →
commonLarvalForm	nauplius larva →
development	often includes larval stages →
ecologicalRole	detritivores → important zooplankton components → predators → primary consumers →
economicImportance	major source of seafood → some species are pests → used in aquaculture feed →
exoskeletonComposition	chitin → often calcified →
feedingMode	filter feeding (in many species) → predation (in many species) → scavenging (in many species) →
firstAppearance	Cambrian period →
fossilRecord	rich fossil record in marine sediments →
hasCharacteristic	bilateral symmetry → chitinous cuticle → compound eyes (often on stalks) → hard exoskeleton → jointed appendages → many freshwater species → many marine species → molts exoskeleton → mostly aquatic → paired appendages → segmented body → some terrestrial species → usually two pairs of antennae →
hasSubgroup	Branchiopoda → Cephalocarida → Malacostraca → Maxillopoda → Ostracoda → Remipedia →
includes	amphipods → barnacles → copepods → crabs → fairy shrimp → isopods → krill → lobsters → shrimp → water fleas (Daphnia) → woodlice →
isA	aquatic invertebrate group → arthropod group →
kingdom	Animalia →
locomotion	swimming with specialized appendages → walking with thoracic legs →
nervousSystem	ventral nerve cord with ganglia →
phylum	Arthropoda →
reproduction	mostly sexual reproduction →
respiration	usually via gills →
skeletonType	exoskeleton →
taxonRank	subphylum →
typicalBodyPlan	cephalothorax plus abdomen →

Referenced by (4)

Subject (surface form when different)	Predicate
Arthropoda →	includes
Malacostraca →	isLargestClassOf
Malacostraca →	isMostDiverseClassOf
Malacostraca →	subphylum