BIOL228 - Sponges etc

Porifera

Phylum for sponges which have one true tissue layer

Oscula

Big water opening for water flowing out

Ostia

Small water opening for water flowing in

Choanocytes

Flagellated cells for eating

Clacerea

Sponges which can be asconoid, syconoid or leuconid and are make of calcium carbonate

Hexactinellida

Glass sponges which are siliceous and have 6 rayed spicules and can be sycnoid or leuconoid

Demospongaie

Most sponges which are made of spongin and/or siliceous spicules and are only leuconoid

Cnidaria

Jelly fish/anemone Phylum which have two true tissue layers

Mesoglea

Jelly stuff of jelly fish

Nematocysts

Stingers on jelly fish

Hydrozoa

Polyp and mesusae jelly fish

Anthozoa

Seas anemones and coral which are sessile polyps

Scyphozoa

True jellyfish which are only medusae

Gastrozoids

Organ for food in jellies

Gonozoids

Organ for sex in jellies

Platyhelminthes

Phylum for flat worms, tape worms and flukes - are parasitic

Cephalized

Having a head

Annelina

Phylum for Sea worms and earth worms which are segmented

Setae

Bristles on worms

Clitellata

Earth worms which are hermaphroditic

Polychaeta

Sea worms very bristly with seperate sexes

Parapodia

Arms used for increased surface area for gas exchange

Clitellum

Saddle used for reproduction

Mollusca

Chiton, paua, snails and quid phylum

Polyplactophora

Chiton - 8 plates and seperate sexes

Mantle

Skirting of shell thing

Ctinida

In mantel cavity and are used for respiration

Radula

Tongue used for scraping in nails and chiton etc

Gastropodia

Class for snails, slugs which undergo torsion and don't have ctenidia

Operculum

door on the foot of snails

Bivalvia

Muscles and clams - means two shells and do not have a radula

Cephalopoda

Squid and Octopus, have tentacles instead of a foot

Arthropoda/Crustacea

Phylum/subphylum for shrimp, crabs and barnacles which lose their shells, are segmented and have the 5,8,6 appendages

Decapoda

Class for shrimp, crab and lobster - have claws, and gills of thoracic legs

Copepoda

Class for plankton

Cirripedia

Class for barnacles which use cirri for feeding and breathing

Carapace

Top shell

Echinodermata

Phylum for star fish and cucumbers which have 5 part radial symmetry, no brain and tube feet

Asteroidea

Normal star fish

Ophiuroidea

Brittle starts which have a clear disk in the centre and don't use their tube feet to move

Echinoidea

Kina with a skeleton called test, pedicellariae and Aristotle lantern for eating

Holothuroidea

Sea cucumbers which have fronds in its mouth

Ampullae

Water tube feet

Urochordata

Subphylum for sea squirts

Ascidiacea

Sea squirt which has a tunic and pharyngeal slits