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Platyhelminthes
Phylum of flatworms
Phylum Rotifera (rotifers)
-pseudocoelomates
-microscopic
-aquatic (marine and freshwater)
-corona of cili used for filter feeding
-mostly sexual reproduction
Phylum Mollusca
soft bodied animals
clams, octopus, snails, squid
Mantel
The outside covering, makes the shell on the organism.
Ctenidia
specialized gills in mollusks
Radula
tongue-shaped structure used for feeding by snails and slugs
Gastropoda (class)
a mollusk that has a well-developed head and a flattened foot, such as a snail, slug, or conch
Bivalvia
The class of the phylum Mollusca that includes clams, oysters, and mussels.
Cephalopoda (Mollusca)
squid, octopus
Torsion
act of twisting; stress due to twisting forces exerted on a body. The process of twisting of gastropods that allow the organisms to fit in their shells.
Nudibranchs
Sea slugs that lack a shell and have exposed gills
Kleptocnidae
storing nematocysts from digested prey to make themselves toxic to predators
Class Bivalvia
clams, mussels, scallops, oysters
Siphons
The tube-like extension through which water flows in and out of the mantle cavity in bivalves and cephalopods, and in tunicates
Class Cephalopoda
squid, octopus, nautilus
Characteristics of Cephalopoda
-marine predators
-foot modified into tentacles and arms
-well-developed eyes
-closed circulatory systems
Phylum Annelids
Worms, with bodies made up of ring-like segments. Most live in water, though some, like the earthworm, live in moist soil.
Metamerism
Having repeating segments.
Polychaeta
marine worms that have parapodia (fleshy appendages) and chaeta which are hairs used for locomotion or gas exchange.
Genus Riftia
Deep-sea tube warm that don't have a mouth or a stomach, but have chemosynthetic bacteria that digest for them.
Arthropods Phylogeny
Four distinct classes with segmentation, an exoskeleton, and jointed appendences.
Chelicerata
a sub phylum of arthropods; includes Horseshoe crabs, spiders, scorpions, mites etc.
Crustacea
a large class of arthropods, including crabs and lobsters
Hexapoda
Subphylum of insects
Tagmata
Prominent body regions in arthropods, such as the head, thorax, and abdomen in insects. (body regions that are made up of many sections)
uniramous
single-branched appendages
biramous
Consisting of or having two branches, as the appendages of an arthropod.
ommatidia
One of the small optical units of the compound eye of arthropods
Class Chelicerata
Spiders, ticks, mites, scorpions, daddy long-legs, horseshoe crabs, sea spiders. Each having chelicerae which are fangs or pinchers. Bodies are divided into two tagmata.
Order Araneae
true spiders
Class Crustacea
crustaceans, three tagmata, most appendages are biramous, and the cephalon and thorax fuse to from a cephalothorax.
Order Cirripedia
Barnacles
"Cloud-like" or "feathery-feet"
Marine. Appendages are the feet and capture food.
Class Hexapods
insects which three body regions; head, thorax, and abdomen.
