porifera

1

Phylum Porifera

2

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

Simple Sponge Morphology

3

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

Sponge Body Forms

4

Spicule

Skeleton of sponge Calcium carbonate Silicon Collagen

5

Archeocyte

Amoeboid cells Receive food from

choanocytes Differentiate into

other cell types

6

Mesenchyme(Mesoglea or Mesohyl)

Gelantinous matrix

7

Pinococyte

Outer surface of sponge

Contractile

8

Choanocyte

Flagellated cells One end in

mesnchyme Flagella creates

water currents Collar traps food Passes food to

archeocyte

9

Porocyte

Forms a pore

10

Asconoid SpongeAsconoid Sponge

OstiumOstiumOstiumOstium

SpongocoelSpongocoelSpongocoelSpongocoel

OsculumOsculumOsculumOsculum

PorocytePorocytePorocytePorocyte

11

Syconoid Sponge

Osculum

Ostium

Spongocoel

Choanocytes

Radial CanalIncurrent Canal

12

Syconoid Sponge

Spongocoel

Ostium

ChoanocytesRadial Canal

Incurrent Canal

Scypha (Grantia) xs

13

Leuconoid SpongeLeuconoid Sponge

ChoanocyteChoanocytechamberchamber

ChoanocyteChoanocytechamberchamber

OsculumOsculumOsculumOsculum

Incurrent canalIncurrent canalIncurrent canalIncurrent canal

Excurrent canalExcurrent canalExcurrent canalExcurrent canal

Incurrent poreIncurrent poreIncurrent poreIncurrent pore

14

Class CalcareaGrantia

Small Vase shape Spicules of calcium

carbonate Straight or 3-4 rays

15

Class Hexactinellida Euplectella

Spicules Siliceous 6 rays

16

Class Demospongiae Spongia

Spicules Siliceous spongin

17

18

Physiology

19

Sexual Reproduction

Monoecious Both male and female

Sperm and egg derived from choanocytes

Ciliated larva Swim to new location

20

BuddingBudding

FragmentationFragmentation

Gemmule formationGemmule formation

-survive freezing-survive freezing

BuddingBudding

FragmentationFragmentation

Gemmule formationGemmule formation

-survive freezing-survive freezing

MicropyleMicropyleMicropyleMicropyle

SpiculeSpiculeSpiculeSpicule

Asexual ReproductionAsexual Reproduction