1. WORD OF THE DAY
extant

2. Phylum Porifera (“pore bearer”)
Kingdom Animalia
Phylum Porifera (“pore bearer”)
Class: Calcarea
Class: Hexactinellida
Class: Demospongia
Class: Homoscleromorpha
Cellular level of organization
specialized cells
no tissues, no organs, etc.
Skeleton
spicules and spongin

3. The Cambrian Explosion

4. Structure of Sponges

9. A. Choanocytes
B. Pinacoderm
C. Spicules
D. Flagellated Chambers C B A D

10. Choanocytes (aka Collar Cells)

11. calcium carbonate
Sponge Skeletons
silica
protein (spongin)

12. Types of Canal Systems Asconoid Syconoid Leuconoid Flagellated
spongocoel
Syconoid
Flagellated
canals
Leuconoid
Flagellated
chambers

13. Reproduction: Sexual & Asexual
SEXUAL (monoecious)
sperm & oocytes  parenchymula larva

14. Reproduction: Sexual & Asexual
SEXUAL (monoecious)
sperm + oocytes  parenchymula larva
ASEXUAL
external budding
archaeocytes  gemmules

15. PORIFERA Class Calcarea
calcium spicules
ascon, sycon or leucon

16. Grantia (a.k.a. Scypha)

17. PORIFERA Class Hexactinellida
siliceous spicules
sycon or leucon
trabecular reticulum
Euplectella
Venus’ Flower Basket

18. PORIFERA Class Demospongiae
siliceous spicules or spongin or both
leuconoid
Fire sponge

19. Class Demospongiae
Yellow tube sponge
Green rope sponge

20. Class Demospongiae
Blue Jacket sponge
Red encrusting sponge

21. Boring or Sulfur Sponge
Class Demospongiae
Red Beard Sponge
Boring or Sulfur Sponge

22. PORIFERA Class Homoscleromorpha
few, simple siliceous spicules or none at all
pinacoderm resembles a
true tissue epithelium

23. Adaptive Diversification
Asbestopluma hypogea

24. Adaptive Diversification
Chondrocladia lampadiglobus
Chondrocladia lyra