Corals

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Phylum of Corals
Cnidaria
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Class of Corals
Anthozoa
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What is the bowl shaped depression where the polyp lived called?
Calice
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Axial rod which supports the septa, running up the centre of some corals?
Columella
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The outermost layer of a corals skeleton (often wrinkled in solitary corals)
Epitheca
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Horizontal plates dividing the corallite skeleton
Tabula
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The skeleton produced by one polyp
Corallite
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Wrinkles produced as the polyp grows
Growth lines
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Vertical plates, dividing and providing strength to the corallite skeleton
Septa
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Curved plates connected to septa and tabulae
Dissepiments
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Which type of coral is extant?
Scleractinian
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Which Coral lived between Ordovician and Permian
Rugose
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Which coral lived between Cambrian to Permian
Tabulate
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In which geological period did Scleractinian corals evolve?
Triassic
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Tabulae are found in all types of corals, which group has well developed tabular?
Tabulate
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Which type of coral has large corallites?
Rugose
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Which type of coral always has dissepiments present?
Scleractinian
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Which two types of coral have radial symmetry?
Tabulate and Scleractinian
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Which type of coral doesn't have a collumella?
Tabulate
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Which type of coral only sometimes has a columella?
Scleractinian
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Which type of coral always has a columella?
Rugose
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What is the pattern of septa in Rugose corals?
6 Major septa and 4 minor septa
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Do Tabulate corals have septa?
Sometimes but reduced or poor
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What is the pattern of the septa in Scleractinian corals?
6 Major septa radially
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There are two types of coral which are found as both colonial and solitary, which are they?
Rugose and Scleractinian
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Is Tabulate found as a solitary or colonial coral?
Colonial
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Which type of coral sometimes has mural pores?
Tabulate
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When a small increase in temperature or pollution causes the polyps to die, killing the reef, this is called?
Coral bleaching
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What are Zooxanthella's?
A type of algae that lives inside modern-day coral cells. There is a symbiotic relationship between the algae and the coral (the algae can photosynthesis)
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What temperature do corals live in?
Temperate : 23-27C
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What depth of water do they inhabit?
0
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Where in the world are corals found?
Between 30 degrees North and 30 degrees South of the equator
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What energy level do corals live in?
High energy, as this incorporates more oxygen and circulates nutrients
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What are the three ways modern-day coral reefs form?
Fringing reef (near land), or Barrier reef (offshore), or Atolls and Coral islands (offshore, due to hotspot volcanoes, ring-shaped)
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Other cards in this set

Card 2

Front

Class of Corals

Back

Anthozoa

Card 3

Front

What is the bowl shaped depression where the polyp lived called?

Back

Preview of the front of card 3

Card 4

Front

Axial rod which supports the septa, running up the centre of some corals?

Back

Preview of the front of card 4

Card 5

Front

The outermost layer of a corals skeleton (often wrinkled in solitary corals)

Back

Preview of the front of card 5
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