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Phylum Porifera

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Simple Sponge Morphology

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Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Sponge Body Forms

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Spicule

Skeleton of sponge Calcium carbonate Silicon Collagen

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Archeocyte

Amoeboid cells Receive food from

choanocytes Differentiate into

other cell types

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Mesenchyme(Mesoglea or Mesohyl)

Gelantinous matrix

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Pinococyte

Outer surface of sponge

Contractile

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Choanocyte

Flagellated cells One end in

mesnchyme Flagella creates

water currents Collar traps food Passes food to

archeocyte

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Porocyte

Forms a pore

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Asconoid SpongeAsconoid Sponge

OstiumOstiumOstiumOstium

SpongocoelSpongocoelSpongocoelSpongocoel

OsculumOsculumOsculumOsculum

PorocytePorocytePorocytePorocyte

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Syconoid Sponge

Osculum

Ostium

Spongocoel

Choanocytes

Radial CanalIncurrent Canal

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Syconoid Sponge

Spongocoel

Ostium

ChoanocytesRadial Canal

Incurrent Canal

Scypha (Grantia) xs

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Leuconoid SpongeLeuconoid Sponge

ChoanocyteChoanocytechamberchamber

ChoanocyteChoanocytechamberchamber

OsculumOsculumOsculumOsculum

Incurrent canalIncurrent canalIncurrent canalIncurrent canal

Excurrent canalExcurrent canalExcurrent canalExcurrent canal

Incurrent poreIncurrent poreIncurrent poreIncurrent pore

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Class CalcareaGrantia

Small Vase shape Spicules of calcium

carbonate Straight or 3-4 rays

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Class Hexactinellida Euplectella

Spicules Siliceous 6 rays

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Class Demospongiae Spongia

Spicules Siliceous spongin

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Physiology

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Sexual Reproduction

Monoecious Both male and female

Sperm and egg derived from choanocytes

Ciliated larva Swim to new location

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BuddingBudding

FragmentationFragmentation

Gemmule formationGemmule formation

-survive freezing-survive freezing

BuddingBudding

FragmentationFragmentation

Gemmule formationGemmule formation

-survive freezing-survive freezing

MicropyleMicropyleMicropyleMicropyle

SpiculeSpiculeSpiculeSpicule

Asexual ReproductionAsexual Reproduction