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Sponge Reproduction Asexual –Budding –Fragmentation –Gemmule formation (internal buds)

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Presentation on theme: "Sponge Reproduction Asexual –Budding –Fragmentation –Gemmule formation (internal buds)"— Presentation transcript:

1 Sponge Reproduction Asexual –Budding –Fragmentation –Gemmule formation (internal buds)

2 Gemmules Large mass of archaeocytes (amoebocytes) Formed during harsh conditions Environmentally resistant When ready, archaeocytes are released form new sponges.





7 Ephydatia fluviatilis

8 M G Ephydatia fluviatilis Gemmoscleres And Megascleres

9 Ephydatia fluviatilis Gemmules


11 Ephydatia fluviatilis Gemmule

12 Ephydatia fluviatilis Gemmule Surface

13 Ephydatia fluviatilis Gemmoscleres Birotulate

14 Spongilla lacustris


16 Spongilla lacustris Megascleres And Microscleres m M

17 Spongilla lacustris Gemmules With Micropyle Mycropyle Spicules

18 Spongilla lacustris Gemmoscleres Slightly Curved Amphistrongyla Covered With A Variable Number Of Recurved Spines

19 Sponge Reproduction Sexual –Eggs from amoebocytes and sperm from collar cells (or amoebocytes) –Sperm is released into water Ova fertilized in mesohyl after sperm brought in by water current Here, the zygote develops into a flagellated larvae: parenchymula OR!

20 Fertilization The Smoking Sponges Mature sperm and oocytes are released into the environment through the aquiferous system. Fertilization takes place in the water (ovipery).

21 The Parenchymula larva is generally ciliated and solid.

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