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Platyhelminthes Kim Paul Emelie Poirier Chloe Raitt Hailey Reagh.

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Presentation on theme: "Platyhelminthes Kim Paul Emelie Poirier Chloe Raitt Hailey Reagh."— Presentation transcript:

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2 Platyhelminthes Kim Paul Emelie Poirier Chloe Raitt Hailey Reagh

3 Introduction  Platyhelminthes  Flatworms  20,000+ known species  Range in length  Feed on animal material, algae  Bilaterally symmetrical  3 cell layers  Mostly hermaphroditic  Live everywhere  Moist environments

4 Evolution  Soft, small bodies don’t produce a well fossilized record.  Schistosome larvae, oldest subspecies found, discovered in Egyptian Mummies.  Nothing concrete found before them.  Believed to have first appeared around 550 MYA.

5  Biochemical aspects used to determine Tree of Life.  Still discrepencies in Tree of Life with taxon relationships.  Parasitic subgroup (Trematoda, Monogenea, and Cestoda) are believed to be monophyletic  Acoela are believed to have a different ancestor. Evolution

6 Classification  Phylum – Platyhelminthes  Greek words  Platy for flat  Helminthes for worm  Classes  Cestoda (parasitic tapeworms)  Trematoda (parasitic flukes)  Turbellaria (free living Planaria)

7 Major Subgroups Turbellaria Trematoda Cestoda

8 Turbellaria  Free-living group  Mostly benthic and marine  Over 4000 species

9 Trematoda  Group of parasites  9000 species have been discovered  Worm-like or flattened oval  Human liver flukes and blood flukes

10 Cestoda  Parasites  5000 known species  Long and flat bodies

11 Characteristics  Unsegmented bodies  Lack of skeletal system  Lack of circulatory system  Lack of body cavity  Locomotion  Nervous system  Digestive system

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13 Fun Facts!  Both salt water and freshwater  Tolerant of pollution  Come in great lengths  Withstand starvation  Simplest form of the worm  Regenerate  Reproduce sexually and asexually

14 References  Platyhelminthes. Gerlinger, Friedrich. Web. http://home.arcor.de/gerber.7/platyhelminthes.htm http://home.arcor.de/gerber.7/platyhelminthes.htm  Flatworm – Parasites. O’Shea, Lorraine. Web. http://poster.4teachers.org/view/poster.php?poster_id=379778 http://poster.4teachers.org/view/poster.php?poster_id=379778  Ramel, Gordon (n.d). The Phylum Platyhelminthes. Earthlife. March 4, 2013, from http://www.earthlife.net/inverts/platyhelminthes.html http://www.earthlife.net/inverts/platyhelminthes.html  Target Informatics Pvt. Ltd. (2013). Platyhelminthes. Target Study. March 4, 2013, from http://targetstudy.com/nature/animals/platyhelminthes/http://targetstudy.com/nature/animals/platyhelminthes/  http://www.ucmp.berkeley.edu/platyhelminthes/platyhelminthes.html http://www.ucmp.berkeley.edu/platyhelminthes/platyhelminthes.html  http://www.naturwissenschaften.be/en/institute/associations/rbzs_website/bjz/ back/pdf/BJZ%20131%28s1%29/Volume%20131%28s1%29,%20pp.%2035- 46.pdf http://www.cisneros- heredia.org/infotrans/usfq/zoologia/pdfs/rohde2001.pdf http://www.naturwissenschaften.be/en/institute/associations/rbzs_website/bjz/ back/pdf/BJZ%20131%28s1%29/Volume%20131%28s1%29,%20pp.%2035- 46.pdf http://www.cisneros- heredia.org/infotrans/usfq/zoologia/pdfs/rohde2001.pdf  Campbell, A. 2001. "Turbellaria" (On-line), Animal Diversity Web. Accessed March 06, 2013 at http://animaldiversity.ummz.umich.edu/accounts/Turbellaria/ http://animaldiversity.ummz.umich.edu/accounts/Turbellaria/  Myers, P. 2001. "Trematoda" (On-line), Animal Diversity Web. Accessed March 06, 2013 at http://animaldiversity.ummz.umich.edu/accounts/Trematoda/http://animaldiversity.ummz.umich.edu/accounts/Trematoda/  Myers, P. 2001. "Cestoda" (On-line), Animal Diversity Web. Accessed March 06, 2013 at http://animaldiversity.ummz.umich.edu/accounts/Cestoda/http://animaldiversity.ummz.umich.edu/accounts/Cestoda/  McDarby, Michael. (2001-2013). Flatworms(Platyhelminthes). An Online Introduction to the Biology of Animals and Plants. March 6, 2013, from http://faculty.fmcc.suny.edu/mcdarby/animals&plantsbook/animals/03- Flatworms.htm http://faculty.fmcc.suny.edu/mcdarby/animals&plantsbook/animals/03- Flatworms.htm

15 Photos  http://species.wikimedia.org/wiki/Platyhelminthes http://species.wikimedia.org/wiki/Platyhelminthes  http://planet.uwc.ac.za/nisl/biodiversity/loe/page_20.htm http://planet.uwc.ac.za/nisl/biodiversity/loe/page_20.htm  http://quizlet.com/4357176/platyhelminthes-nematodes-rotifers-flash-cards/ http://quizlet.com/4357176/platyhelminthes-nematodes-rotifers-flash-cards/  http://skepticalsquirrel.wordpress.com/2012/07/28/backwards-before-we-go- forwards/ http://skepticalsquirrel.wordpress.com/2012/07/28/backwards-before-we-go- forwards/  http://egy-king.blogspot.ca/2012/09/ancient-egyptian-mummies.html http://egy-king.blogspot.ca/2012/09/ancient-egyptian-mummies.html  http://www.rzuser.uni-heidelberg.de/~bu6/Introduction11.html http://www.rzuser.uni-heidelberg.de/~bu6/Introduction11.html  http://www.elasmodiver.com/images/flat-worm.jpg http://www.elasmodiver.com/images/flat-worm.jpg  http://sharonapbio-taxonomy.wikispaces.com/Animalia-Platyhelminthes http://sharonapbio-taxonomy.wikispaces.com/Animalia-Platyhelminthes  http://www.richard- seaman.com/Underwater/Philippines/Nudibranchs/index.html http://www.richard- seaman.com/Underwater/Philippines/Nudibranchs/index.html  http://www.starfish.ch/c-invertebrates/flatworms.html http://www.starfish.ch/c-invertebrates/flatworms.html  http://biodidac.bio.uottawa.ca/thumbnails/filedet.htm?File_name=Trem054p&Fil e_type=gif http://biodidac.bio.uottawa.ca/thumbnails/filedet.htm?File_name=Trem054p&Fil e_type=gif  http://eol.org/pages/2885/overview http://eol.org/pages/2885/overview  http://www.rzuser.uni-heidelberg.de/~bu6/pow.html http://www.rzuser.uni-heidelberg.de/~bu6/pow.html  http://www.dscc.edu/bwilliams/biology%201120/biol_1120_lab_animals http://www.dscc.edu/bwilliams/biology%201120/biol_1120_lab_animals  http://fineartamerica.com/featured/a-beautiful-flatworm-feeds-on-algae-terry- moore.html http://fineartamerica.com/featured/a-beautiful-flatworm-feeds-on-algae-terry- moore.html  http://www.darwinsgalapagos.com/animals/platyhelminthes_flatworms.htm http://www.darwinsgalapagos.com/animals/platyhelminthes_flatworms.htm  http://www.waterworxbali.com/flatworms.shtml http://www.waterworxbali.com/flatworms.shtml  http://www.tranquil-seas.com/?_escaped_fragment_=portfolio http://www.tranquil-seas.com/?_escaped_fragment_=portfolio


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