Mollusca: Gastropoda: Snail
Annelida: Clitellata: Earthworm
Arthropoda: Insecta: Beetle
Arthropoda: Arachnida: Spider
Mollusca: Bivalvia: Clam Echinodermata: Stelleroidea: Starfish
Arthropoda: Malacostraca: Crayfish
Cnidaria: Scyphozoa: Jellyfish
Cnidaria: Subphylum Anthozoa: Sea Anemone Arthropoda: Arachnida: Scorpion
Porifera: Demospongiae : Sponge:
Nematoda: -------- : Roundworm
Arthropoda: Malacostraca: Crab
Mollusca: Bivalvia: Oyster Mollusca: Gastropoda: Conch
Annelida: Clitellata: Leech
Echinodermata: Echinoidea: Sea Urchin
Platyhelminthes: Trematoda: Fluke Chordata: Cephalochordata: Lancelet
Cnidaria: Subphylum Anthozoa: Coral
Platyhelminthes: Cestoda: Tapeworm
Mollusca: Gastropoda: Limpet
Annelida: Polychaeta: Fanworm/Featherworm Echinodermata: Holothuroidea: Sea Cucumber
Mollusca: Cephalopoda: Cuttlefish
Arthropoda: Merostomata: Horseshoe crab
Echinodermata: Stelleroidea: Brittle Star Chordata: Tunicata (Urochordata)/ Ascidiacea
Echinodermata: Echinoidea: Sand Dollar
Arthropoda: Arachnida: Sun Spider/ Wind Scorpion Lab 1:
Sponge: Grantia CS.
Show Water flow and Where food particles are trapped. Sponge: Grantia L.S.
How are Gametes Released?
Gametes released from Osculum through ostia, when sperm is released into the water and are caught
by choanocytes, then transported to the eggs for fertilization.
Cnidaria: HYDRA: CS Hydra: LS:
In which tissue layer are Cnidiocyte located?
Located in the epidermal cells formed in the tentacles to aid in prey capture since they act as
stingers. If they were in more inner layers they wouldn’t be very effective.
Examine specimens and whole mount of obelia (hydrozoan), how does it differ from hydra?
What other very different hydrozoan is on display? Does it resemble hydra or obelia more?
The obelia has numerous branching along its body, it has reproductive polyps instead of
gonads. It specifically has 2 polyps, one for feeding (tentacles) and one for reproduction
(budding). Also the epidermis resembles spikes on the outer covering.
The other organism is Portuguese man of war, resembles the obelia more because the hydroid
colony of the obelia resembles tentacles. Scyphozoa (Aurelia):
How does the medusa form differ from the polyp form?
Polyp form is cylindrical with a long stalk, lacks a vellum and sense organs, reproduces asexually
and is sessile.
Medusa is free living motile and have a flat, round shaped body. The vellum is present, there
are sense organs, four gonads and medusa reproduce sexually. Metridium: (Anthozoa, Hexacorallia)
Compare and contrast this organism with hydra:
Both have tentacles containing cnidocysts that capture food.
Both have a polyp stage
Both have a mouth on upper surface.
Metridium contains a pharynx and mesentries.
Examine corals on display, which of the organisms you drew do they most closely resemble?
Corals resemble Cnidaria, more specifically they resemble the Obelia. Both contain polyps and
are found attached by a basal membrane to hard surfaces. LAB 2:
Annelida: Polychaeta: Blood Worm: Predator:
Annelida: Polychaeta: Feather duster worm: Filter Feeder
Platyhelminthes: Cestoda: Tapeworm: Parasite:
Annelida: Clitellata: Leech: Ectoparasitic: Annelida: Polychaeta: Ophelia: Filter Feeder
Nematoda: --------: Ascaris: Parasite
Annelida: Polychaeta: Tube Worm: Filter Feeder
Annelida: Polychaeta: Sea Mouse: Predator Lab 2:
Platyhelminthes: Turbellaria: Planaria: CS
Platyhelminthes: Turbellaria: Planaria: W.M.
Platyhelminthes: Trematoda: Clonorchis: Turbellaria: Trematoda:
Feeding Gut is multibranched. Gut is 2 lobed.
Has a protrusible pharynx used Lives in an intermediate host,
in catching prey and they are endoparasitic, living
transferring them to the inside host tissue and feeding
adjacent mouth opening. directly from their bodies
Reproduction Simultaneous Hermaphrodites, Hermaphroditic, eggs come
sperm exchange + egg from definitive host and are
fertilization can occur when eaten by the intermediate host
individuals interact. where they hatch. Asexual
reproduction can occur where
Asexual reproduction Miracidium develops to a
(detaching tail where each can sporocyst that has redia which
grow to form new individual). facilitate the asexual
reproduction of individuals.
Locomotion Move by beating cilia on the Attaches to host using oral
ventral surface, subtle waves of