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Cnidaria Ctenophore diversity

Zoology 212 Lecture notes on Cnidaria and Ctenophore diversity
Course

Zoology (BIOL 212)

28 Documents
Students shared 28 documents in this course
Academic year: 2022/2023
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Saginaw Valley State University

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1 Class Scyphozoa: true jellyfish with a thick & firm mesoglea. M. Strike & K. Jones, salinella.bio.uottawa At the notches of the bell margin, a rhopalium lies between lappets and holds a statocyst and ocelli. flickr The 4 “horseshoes” have digestive and reproductive [internal fertilization] functions. The thin lines are canals and part of the gastrovascular cavity. 1 2 Class Cubozoa: sea wasps are active swimmers and hunters. The ocelli can probably form images! O’Connor et al., 2010 Dermonecrotic toxin kills in minutes. theguardian 24 eyes. Tentacles from the corners. velarium 2 radial symmetry ≠ directed movement

Radial

SUMMARY

mesoglea

  • NO
directed

movement

aboral

####### side

> Increase SA sensory organs

####### around

the be "

1

light receptor " simple eye " equilibrium NO Image formed " box Jew " endopacefic many eyes active eyes / Area which the bell curves over

3

Class Anthozoa: corals & anemones have ONLY a polyp stage.

Mutualistic relationship with zooxanthellae. When zooxanthellae leave, the coral bleaches [loses colour]. britannica Todd LaJeunesse Clownfish program tentacles not to fire nematocysts. Cross section: Function of coupled septa? Most abundant in shallow, warm marine waters. Why? K. Bridle & S. Romano, Salinella.bio.uottawa © Kirsten Michalek-Wagner & Anya Salih GVC outside 3 4

Class Hydrozoa: A diverse group with solitary and colonial

forms, resulting in enhanced diversification within this group.

Portuguese man-of-war colony of polyps [zooids] in medusa form. Gonangium Hydranth S. Ye and S. Cuddihy, salinella.bio.uottawa Obelia: colony in polyp form The polyps do not detach, and the colony grows larger. Like other colonial animals, we see the separation of some body functions. What is the difference between the red and translucent areas? 4 "

flower

animal

" - Coral region endemism endemic species

- Dinoflagellates

food via photosynthesis

Septa - Increase surface area

biradial symmetry

  • Colonial

t

filled

w

air

null

Perisarc- dead reproduction

colonial

hydrozoan

polyp

living

g

^^

in a colony

7 Ctenophores have 8 ctenes for locomotion, produce colloblasts to collect food [not cnidocytes], have 3 germ layers and a collenchyme middle layer [not mesoglea]. cronodon/BioTech/Ctenophores.html Direction of cilia powerstroke Direction of travel [mouth first] Retractable tentacles with cnidocytes in some members. Anal pore: 1-way digestive tract cydippid larva arcodiv No polymorphic body plans Never colonial 7 8 Sea walnuts are bioluminescent, monoecious, marine predators. Internal structure yields biradial symmetry. divediscover.whoi smashinglists deepbluehome.blogspot faculty.washington ctene 8

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Cnidaria Ctenophore diversity

Course: Zoology (BIOL 212)

28 Documents
Students shared 28 documents in this course

University: Saginaw Valley State University

Was this document helpful?
1
1
Class Scyphozoa: true jellyfish with a thick & firm mesoglea.
M. Strike & K. Jones, salinella.bio.uottawa.ca
At the notches of the bell margin, a
rhopalium lies between lappets and
holds a statocyst and ocelli.
www.flickr.com
The 4 “horseshoes”have digestive
and reproductive [internal
fertilization] functions.
The thin lines are canals and part of
the gastrovascular cavity.
1
2
Class Cubozoa: sea wasps are active swimmers and hunters.
The ocelli can probably form images!
O’Connor et al., 2010
Dermonecrotic toxin kills in minutes.
www.theguardian.com
24 eyes. Tentacles from the corners.
velarium
2
radial
symmetry
≠
directed
movement
Radial
SUMMARY
mesoglea
•
NO
directed
movement
aboral
side
>
Increase
SA
sensory
organs
around
the
be
"
1
↳
light
receptor
"
simple
eye
"
equilibrium
NO
Image
formed
"
box
Jew
"
endopacefic
many
eyes
active
eyes
/
Area
which
the
bell
curves
over

Students also viewed

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