Activity 16: Activity 16: PHYLUM PHYLUM

PORIFERAPORIFERAThe SpongesThe SpongesPre-Lab DiscussionPre-Lab Discussion

Phylum PoriferaPhylum PoriferaPhylum PoriferaPhylum Porifera Lowest form of multicellular animalsLowest form of multicellular animals Filter feedersFilter feeders SessileSessile Free-swimming ciliated larvaeFree-swimming ciliated larvae Radial or no symmetryRadial or no symmetry Taxonomy is based on:Taxonomy is based on:

Endoskeletal elementsEndoskeletal elements SizeSize Composition of spiculesComposition of spicules

Lowest form of multicellular animalsLowest form of multicellular animals Filter feedersFilter feeders SessileSessile Free-swimming ciliated larvaeFree-swimming ciliated larvae Radial or no symmetryRadial or no symmetry Taxonomy is based on:Taxonomy is based on:

Endoskeletal elementsEndoskeletal elements SizeSize Composition of spiculesComposition of spicules

SKELETAL SKELETAL ELEMENTSELEMENTSSKELETAL SKELETAL ELEMENTSELEMENTS

Crystalline spiculesCrystalline spicules Calcareous Calcareous Siliceous Siliceous

Spongin fibersSpongin fibers

Crystalline spiculesCrystalline spicules Calcareous Calcareous Siliceous Siliceous

Spongin fibersSpongin fibers

ClassesClassesClassesClasses CalcispongiaeCalcispongiae – CaCO3 spicules – CaCO3 spicules HalospongiaeHalospongiae – siliceous – siliceous DemospongiaeDemospongiae – siliceous, spongin, – siliceous, spongin,

or bothor both SclerospongiaeSclerospongiae – siliceous and – siliceous and

spongin spongin

internallyinternally

– – calcium carbonate calcium carbonate

externally externally

CalcispongiaeCalcispongiae – CaCO3 spicules – CaCO3 spicules HalospongiaeHalospongiae – siliceous – siliceous DemospongiaeDemospongiae – siliceous, spongin, – siliceous, spongin,

or bothor both SclerospongiaeSclerospongiae – siliceous and – siliceous and

spongin spongin

internallyinternally

– – calcium carbonate calcium carbonate

externally externally

CANAL SYSTEMSCANAL SYSTEMSCANAL SYSTEMSCANAL SYSTEMS AsconoidAsconoid SyconoidSyconoid Leuconoid Leuconoid

AsconoidAsconoid SyconoidSyconoid Leuconoid Leuconoid

SPECIMEN:SPECIMEN:SPECIMEN:SPECIMEN: LeucosoleniaLeucosolenia – microscopic (w.m.)– microscopic (w.m.) GrantiaGrantia – microscopic (l.s.)– microscopic (l.s.) EuplectellaEuplectella (Venus Flower Basket)(Venus Flower Basket) SpongiaSpongia (common bath sponge)(common bath sponge) CarteriospongiaCarteriospongia (Elephant’s ear)(Elephant’s ear)

LeucosoleniaLeucosolenia – microscopic (w.m.)– microscopic (w.m.) GrantiaGrantia – microscopic (l.s.)– microscopic (l.s.) EuplectellaEuplectella (Venus Flower Basket)(Venus Flower Basket) SpongiaSpongia (common bath sponge)(common bath sponge) CarteriospongiaCarteriospongia (Elephant’s ear)(Elephant’s ear)

Carteriospongia

Euplectella

Leucosolenia

Grantia c.s.

IDENTIFYIDENTIFY

Stolon Stolon (if present)(if present) OsculumOsculum SpongocoelSpongocoel Ostium Ostium

Stolon Stolon (if present)(if present) OsculumOsculum SpongocoelSpongocoel Ostium Ostium

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