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15 Cards in this Set

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PHYLUM: CNIDARIA

CLASS: ANTHOZOA
SUBCLASS: Zoantheria

Examples: stony corals, anemones, zoanthids
CHARACTERISTICS:


-skeleton, if present (corals) CaCO3 (limestone)

-polyps bear numerous nonpinnate tentacles (in multiples of 6)
PHYLUM: PLATYHELMINTHES

"flatworms"

Examples: planarians, flukes, tapeworms
BODY STRUCTURE:

--flattened bodies, dorsoventially
--3 primary germ layers
*ectoderm - epidermis, nervous system
*endoderm - lining of gut
*mesoderm - msenchyme (filler) reproductive organs, muscles, kidneys

BILATERAL SYMMETRY
PHYLUM: PLATYHELMINTHES

CLASS: Turbellaria

EXAMPLES: Planarians
CHARACTERISTICS:

-body segmented

-without distinct head structure

_with protrusible pharynx sand 1,3, or many intestinal branches

-ventral surface of body ciliated through life

- simple mouth located midventrally on body, a few parasitic forms have suckers

- simple epidermis
PHYLUM: CNIDARIA

BODY SYSTEMS:::::
1) Integument
-neurosensory cells
-epidermis (contains epithaeliomuscular cel)
-cnidocyte - defensive cells
-interstitial cells

2) Skeletal system
-corals -e ach polyp secretes a limestone cup around its base
-hydroids - colonial creatures (made of chiton)
-soft corals

3) Feeding and Digestion - prey on variety of organisms of appropriate size. Starts digestion in gastrovascular cavity

4) Excretion
-no specific excretory structures
-each cell eliminates its own waste

5) Respiration (gas exchange)
-@ cellular level
6) Circulatory Functions
-no circulation circulatory system
-radial canals in medusae serve as nutrient distribution funtions

8) Nervous system
-nerve net
-sense organs
**ocelli - eye spot cluster of photoreceptor cells, measure light intensity
PHYLUM: CNIDARIA

CLASS: Scyphozoa

Examples: jellyfishes, Aurelia, Cassiopeia
POLYP:

-relatively small and inconspicuous
-mouth leads directly into G-V cavity
-G-V cavity a simple chamber
-no gonads on polyp
-numerous tentacles
-asexual budding by strobilization

MEDUSA:

-numerous radial canals
-manubrium with large oral arms
-gonads gastroderma

NO VELUM
PHYLUM: PLATYHELMINTHES


CLASS: MONOGENEA

Examples; momogenetic flukes
CHARACTERISTICS:

-body segmented

-without distinct head structure

-Pharynx not protrusible; with 2 intestinal branches

-only larval stages ciliated

-wtih oral sucker and large posterior opisthaptor 9w/hooks and suckers)

-epidermis modified intoa tegument, but not used in food absorption
Characteristics


PHYLUM: Cnidaria

***Examples: hydras, jellyfishes, anemones, corals
1) Body consists of 2 cellular layers (epidermis/inner gastrodermis)

2) Radial or biradial symmetry

3) possession of specialized cells (cnidocytes - stingling structures called nematocysts

4) simple or branched gastrovascular cabity

5) Nervous system arranged as a nerve net

CNIDARIA LIFE CYCLE
2 body forms

- Polyp: sessile (attached) form w/tube-like body column and mouth facing upwards
**asexually/sexually reproduction

- Medusa: free swimming;
** mouth suspended downwards underneath umbrella
**sexually-reproducing stage
PHYLUM: CNIDARIA

CLASS: ANTHOZOA

**Examples: corals, soft corals, anemones
POLYP:

-lage and conspicuous
-mouth leads into tubelike pharynz
-G-V cavity partitioned by septa (mesenteries)
-gonads presetn on polyp, gastrodermal
-6,8, or numerous tentacles
-asexual budding lateral

MEDUSA:

_medusa absent
PHYLUM::: PLATYHEWLMINTHES

Life system

1) Integument - simple epidermis
2) skeletal system - NONE
3)Muscular system - paraehymal muscles - diagonal
4) Digestive system
*feeding styles

5) Excretory system - protenphridium
PHYLUM PLATYHELMINTHES

CLASS: Turbellaria

Exaples: planarians
PHYLUM: PLATYHELMINTHES


CLASS: Cestoda

Examles: tapeworms,, Taenia
CHARACTERISTICS:

-body divided into segments (proglottids)

-with head-like structure called a scolex, for attachment to host

- NO digestive system

--only larval stages in some species ciliated

-scolex armed with suckers; no mouth


-epidermis modified into absorptive tegument
PHYLUM: PLATYHELMINYTHES

CLASS: TREMATODA

Exaples: digenetic flukes, Clonorchis, Fasciola
CHARACTERISTICS:


- body unsegmented

- without distinct head structure

-pharynx not protrusible, w/2 intestinal branches

-only larval stages ciliated

-with oral sucker around mouth and simple ventral sucker

-epidermis modified into absorptive tegument
PHYLUM:: Cnidaria

CLASS: Hydrozoa

**Examples--hydras, hydroids, Obelia, Hydra, Chlorohydra, Portuguese man-of-war
POLYP:

-relatively large and conspicuous
-mouth leads directly into G-V cavity
-gonads, if present on polyp, epidermal
-numerous tentacles
-lateral asecual budding

MEDUSA:

-4 radial canals
-manubrium with small oral lobes
-gonads epiderman

velum present
PHYLUM: CNIDARIA

CLASS: ANTHOZOA
SUBCLASS: Alcyonaria

EXAMPLES: sea fans, sea whips, organ-pipe coral
CHARACTERISTICS:


-skeleton consists of gorgonin protein + crusty CACO3
-polyps bear 8 pinnate 9feathery) tentacles
PHYLUM:: CNIDARIA

CLASS: Cubozoa

**Examples: Australian box jelly, sea wasp
POLYP:

-small and inconspicuous
-mouth leads directly into G-V cavity
-G-V cavity a simple chamber
-no gonads on polyp
-polyp transforms into medusa

MEDUSA:

-4 radial pouches
-manubrium with small oral lobes
-gonads gastrodermal
-4 tentacles

VELARIUM PRESENT