Group Ecdysozoans

Ecdysis

undergo malting of the exoskeleton

What is the exoskeleton of Ecdysozoans made of?

chitin

How do Nematodes move?

thrashing

What type of development do Ecdysozoans have?

protostome development

What animals are in Phylum Arthropoda?

crabs/insects/millipedes/lobsters/spiders

What animals are found in Subphylum Myriapoda?

centipedes and millipedes

What animals are found in Subphylum Crustacea?

lobsters and crabs

What animals are found in Subphylum Chelicerata?

spiders and scorpions

What animals are found in Subphylum Hexapoda?

insects: grasshoppers and bees

Tracheal system

spiracles in exoskeleton with trachea that deliver oxygen directly to cells/tissues

Uniramous legs

leg to foot in one branch

Biramous legs

leg to foot in multiple branches

leg to foot in one branch

Chelicerae

feeding appendages for grabbing and sometimes injecting venom

Mandibles

feeding appendages for crushing/breaking food

What do Subphylum Crustacea and Hexapoda have that Subphylum Chelicerata don’t?

antenna

Carapace

protective shell covering cephalothorax

Uropods

paired appendages that are used for backwards movement

Holometabolous metamorphosis

complete separate life stages where the animal drastically changes in each stage

Hemimetabolous metamorphosis

incomplete life stages separated by malting where the animal gradually changes in each stage

Diapause

seasonal dormancy

Eusociality

specialized forms of communication in species