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Phylum Porifera - Sycon
- 1. PHYLUM PORIFERA -Sycon Phylum Porifera: Sycon- Shryli K S 1 Presented By- ShryliK S Dpt. Of Molecular Biology 08-10-2017 Guided By- Mrs. Chethana C R Dpt. Of Molecular Biology
- 2. CONTENTS • Introduction • Sycon •Habitat • Structure - Spicules - Canal system • Nutrition • Reproduction • Conclusion • References • Acknowledgement Fig 01: A preserved sponge. Phylum Porifera: Sycon- Shryli K S 2
- 3. INTRODUCTION •The name poriferameans “bearing pores”. • Lowest multicellular animals or metazoans without true tissues, i.e., at “Cellular level” of body organization. Phylum Porifera: Sycon- Shryli K S 3 ROBERT GRANT (1793-1874)
- 4. Classes of phylumPorifera Fig 02: Leucosolenia of class Calcarea. Fig 03: Hyalonema of class Hexactinellida. Fig 04: Plakina of class Demospongiae. Phylum Porifera: Sycon- Shryli K S 4
- 5. SYCON Sycon is agenus of calcareous sponges belonging to the family Sycettidae. These sponges are small, having length from 2.5 to7.5, and are flask-shaped and often white to cream in colour. Phylum Porifera: Sycon- Shryli K S 5
- 6. Classification •Kingdom: Animalia •Phylum: Porifera •Class:Calcaria •Order: Heterocoela •Family: Sycettidae •Genus: Scypa (Sycon) Fig 05: Sponge Phylum Porifera: Sycon- Shryli K S 6
- 7. Examples: • Sycon abyssale •Sycon ciliatum • Sycon defendens • Sycon elegans • Sycon formosum • Sycon globulatum • Sycon lunulatum • Sycon mexico • Sycon ramsayi • Sycon tuba Fig 06: Sycon elegans Phylum Porifera: Sycon- Shryli K S 7
- 8. HABITAT • They aremarine. Fig 07: Marine habitat of Sycon Phylum Porifera: Sycon- Shryli K S 8
- 9. STRUCTURE Fig 08: Structureof Sycon Phylum Porifera: Sycon- Shryli K S 9
- 10. SPICULES • The meshingof many spicules serves as the sponge’s skeleton .It provides structural support and defense against predators. Fig 09: Different types of spicules of Sycon. Phylum Porifera: Sycon- Shryli K S 10
- 11. CANAL SYSTEM INSYCON •Paragastric cavity or gastral cavity or spongocoel •Incurrent Canal •Radial canals • Prosopyles • Apopyle •Excurrent Canal Fig 10: Canal system of Sycon. Phylum Porifera: Sycon- Shryli K S 11
- 12. NUTRITION *Nutrition is holozoicand digestion is intracellular. *The sponges feed on micro-organisms which enter into the body along with the water current. Fig 11: Food being engulfed by Sycon. Phylum Porifera: Sycon- Shryli K S 12
- 13. REPRODUCTION • Reproduction isboth asexual and sexual • Asexual- Budding, fragmentation and gemmules. Most sponges are monoecious. Meaning a single sponge can have both male and female sex cells. Sperm cells develop from choanocytes. Egg cells can develop from choanocytes in some species and from archaeocytes in others. After fertilisation an amphiblastula is formed which is a larvea with flagella. Phylum Porifera: Sycon- Shryli K S 13
- 14. GEMMULES SEXUAL REPRODUCTION Phylum Porifera: Sycon- Shryli K S 14 Fig 12:Sycon gemmules. Fig 13:
- 15. CONCLUSION Phylum Porifera: Sycon- Shryli K S 15 Fig 15 :Productsof Tarpon Sponge Company, Florida.
- 16. REFERENCES • Sponges (Porifera),Volume 37, Werner E. G. Müller, 2003, 258 pg. • Gray’s Anatomy, Peter Gray, general Zoology, Oxford and IHB Publishing Co. Newdelhi, 1970, 564pg. • https://www.thoughtco.com/sponges-profile-2291833 • http://www.biozoomer.com/2014/04/sycon-sponge- spicules.html • https://en.wikipedia.org/wiki/Sycon • http://www.biologydiscussion.com/invertebrate- zoology/phylum-porifera/an-example-of-phylum-porifera- sycon/32600 • http://species- identification.org/species.php?species_group=sponges&id=43 5 Phylum Porifera: Sycon- Shryli K S 16
- 17. ACKNOWLEDGEMENT I would liketo thank the Department of Molecular Biology, for providing me this opportunity to present my seminar, I would also like to thank my guide Chethana Ma’am, for her valuable guidance and support through out the preparation of my seminar. Thank you all. Phylum Porifera: Sycon- Shryli K S 17
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