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Ch 6 Porifera diversity

Zoology 212 Lecture notes on Porifera Diversity CH6
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

Phylum Porifera: pore-bearing.

Sponges appear here in

the fossil record,

> 500 million years ago.

msascienceonline.weebly crystalinks paleodirect fossillady.wordpress

1

2

Class Hexactinellida [glass sponges] have 6-pointed spicules

made of silicic acid extracted from the water.

All marine, mostly deep water.

Syconoid, leuconoid body plans.

studyblue

mareco

Spicules form this lattice-

like tube that retains its

form when dried.

2

food sticks

to

collar

→ fi

Her

1mi

oo ↑Éed

ing

Pattern

/

Somalia

?

grow

taller

ten cover

spicules

forms

over

top

2

3

Class Calcarea have CaCO 3 spicules and all 3 body plans.

####### All marine, and many in shallow water

####### Small, 10 cm or less

####### Vase-shaped, but some are encrusting.

####### 3

4

Class Demospongiae include ~80% of all sponges and contain

the only freshwater species.

####### Siliceous spicules and/or spongin.

####### Leuconoid canal system.

####### Mostly marine, 1 group of fw

####### sponges that you can find in MI.

####### Many are asymmetrical.

####### 4

Radial symmetry iii.

I 1

Ostium osdume v4 inches

asymetrical
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Ch 6 Porifera 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
Phylum Porifera: pore-bearing.
Sponges appear here in
the fossil record,
> 500 million years ago.
msascienceonline.weebly.com
crystalinks.com
paleodirect.com
fossillady.wordpress.com
1
2
Class Hexactinellida [glass sponges] have 6-pointed spicules
made of silicic acid extracted from the water.
All marine, mostly deep water.
Syconoid, leuconoid body plans.
www.studyblue.com
www.mareco.org
Spicules form this lattice-
like tube that retains its
form when dried.
2
food
sticks
to
collar
→
fi
Her
1mi
oo󲰜↑Éed
ing
Pattern
/
Somalia
?
grow
taller
ten
cover
spicules
forms
over
top

Students also viewed

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