Chapter 33: Ecdysozoa Slide 89 Flashcards
Name the 6 of Ecydsozoa
Lorifcifera, Priapula, Tardigrada, Onychophora, Nematoda, and Anthropoda
Are tiny and live in marine sediments
Loricifera
A pocket formed by six plates, surrounds the abdomen
Lorica
The head, neck, and thorax telescope in and out of the _______
Lorica
These worms have a large, rounded proboscis at their anterior end
Priapula
Most species burrow in sea floor sediments
Priapula
Are major predators during the Cambrian period
Priapulans
Range from 0.5 mm to 20 cm in length
Priapula
Velvet worms
Onychophora
Originated during the Cambrian explosion
Onychophora
Have fleshy antennae and several dozen pairs of saclike legs
Onychophora
Water bears
Tardigrada
Have a bear like shape and gait, though most are less than 0.5 mm long
Tardigrada
Live in aquatic habitats, or on plants or animals
Tardigrada
In the dormant state, they can survive for days at low temperatures
Tardigrada
Roundworms
Nematoda
Are abundant in soil and aquatic habitats
Nematodes
Many species parasitize plants and animals
Nematoda
A tough cuticle coats their body
Nematoda
The majority of known animal species
Arthropoda
Include insets, crustaceans, and arachnids
Arthropods
Have a segmented exoskeleton with jointed appendages
Arthropoda
This group includes both invertebrates and vertebrate species
Deuterostomia
Name the 3 of Deuterostoma
Hemichordata, chordata, and Echinodermata
Share some traits with chordates, such as gill slits and dorsal nerve cord
Hemichordata
Largest group of Hemichordata is the ________ worms
Acorn
Marine animals that live in mud or under rocks
Acorn worms (Hemichordata)
They can grow more than 2 m in length
Acorn worms (Hemichordata)
More than 90% of all are vertebrates
Chordata
What are the 2 groups of invertebrates of Chordata?
Lancelets and tunicates
Are mine animals that are bilaterally symmetrical as larvae may but not as adults
Echinodermata