(arthro = joint) + (poda = leg)

Phylum Arthropoda  Bilaterally symmetrical, triploblastic  Tagmatization  Paired, jointed appendages  Compound eyes  Open circulatory system  Ventral nervous system  Metamorphosis  Complete digestive tract – mouth  anus  Chitinous exoskeleton  Ecdysis

Classification Arthropoda Trilobitomorpha Chelicerata Crustacea Myriapoda Hexapoda

Subphylum Trilobitomorpha  All marine, all extinct  Body divided into 3 longitudinal lobes  Body divided into three tagmata Head – feeding & sensory Thorax – locomotion Abdomen – visceral organs One pair of antennae Biramous appendages

Trilobite

Chelicerata Classification Arthropoda Trilobitomorpha Chelicerata Merostomata Arachnida Pycnogonida Crustacea Myriapoda Hexapoda

Subphylum Chelicerata  Marine and terrestrial  Body divided into two tagmata Prosoma (cephalothorax) Opisthosoma (abdomen)  Various appendages Chelicerae – feeding Pedipalps – sensory 4 pairs of legs

Class Merostomata

Class Arachnida

Class Pycnogonida

Crustacea Classification Arthropoda Trilobitomorpha Chelicerata Crustacea Branchiopoda Malacostraca Maxillopoda Myriapoda Hexapoda

Subphylum Crustacea  Marine, freshwater and terrestrial  Body divided into three tagmata Head Thorax Abdomen  Two pairs of antennae  5 pairs of head appendages 1 pair of mandibles – chewing & grinding 2 pairs of maxillae – grabbing sometimes combined into cephalothorax

Class Branchiopoda

Class Malacostraca

Class Maxillopoda

Subclass Myriapoda  Chilopoda – lip foot  Diplopoda – double foot

Centipede vs. Tarantula

Millipede in Apopka

Subphylum Hexapoda  Largest subphylum  Terrestrial, freshwater, marine  Body divided into three tagmata Head Thorax Abdomen  one pair of antennae  5 pairs of head appendages 1 pair of mandibles – chewing & grinding 2 pairs of maxillae – grabbing & sucking 1 pair of labium – sensory lower lip 1 pair of clypolabrum – sensory upper lip

Hexapoda Classification  2 classes Entognatha Insecta

Entognatha Collembola - springtails

Insecta  3 subclasses, one with wings – Pterogota  Pterogota - consisting of two infraclasses based on wing placement at rest Palaeoptera – wings held out from the body at rest Neoptera – wings folded at rest

Palaeoptera  Ephemeroptera – mayflies  Odonata – dragonflies & damselflies

Neoptera  17 orders  Wings folded over back at rest  Venation reduced

Mantodea praying mantis

Blattodea cockroaches

Isoptera termites Cause millions of $$ in damage worldwide

African Termites

Dermaptera earwigs

Orthoptera grasshoppers, locusts, katydids & crickets

Phasmida walking sticks & leaf insects

Phthiraptera lice

Hemiptera true bugs

Coleoptera beetles

Lepidoptera butterflies & moths

Diptera flies

Siphonoptera fleas

Hymenoptera bees, wasps, ants

Bee Communication

Metamorphosis  Ametabolous – no change from nymph to adult  Hemimetabolous – changes from wingless nymph  winged imago  Holometabolous – changes from wingless larva  pupa  winged imago

Holometabolous

Hemimetabolous