Grantia

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Phylum Porifera

Grantia (Scypha)

These syconoid sponges are found intertidally in New England, attached to seaweed, shells & stones. It is commonly used in invertebrate laboratories as a type of sycon unit

Scypha

Thick Section
Longitudinal section through whole sponge, showing detail of the flagellated chamber "under oil immersion". You should be able to discern the choanocyte layer resting on teh meso hyl, as awell as amoebocytes. What is the space adjacent to the choanocytes ( in the direction of the flagellae)?
Can you determine the orientation of the specimen by which highly magnified viewof the flagellates chamber? Under whcich conditions could you see both cross sections and longitudinal sections through the flagellated chamber in the same specimen? See BB p.55.

Hi Power C.S.
(from Survey of Invertebrates (Zool250), University of Alberta;
image copyright © Ron Koss & A. Richard Palmer, used with permission)
A. Choanocytes, B. pinacoderm, C-spicules, D-flagellated chambers, E-ostia, F-incurrent canal; external surface of the sponge is to the top

low power cross section
from Survey of Invertebrates (Zool250), University of Alberta;
image copyright © Ron Koss & A. Richard Palmer, used with permission)
A. Choanocytes, B- pinacoderm, C. spicules, D-flagellated chambers; external surface of the sponge is to the top.

These syconoid sponges are found intertidally in New England, attached to seaweed, shells & stones. It is commonly used in invertebrate laboratories as a type of sycon unit
Scypha
Thick Section Longitudinal section through whole sponge, showing detail of the flagellated chamber "under oil immersion". You should be able to discern the choanocyte layer resting on teh meso hyl, as awell as amoebocytes. What is the space adjacent to the choanocytes ( in the direction of the flagellae)? Can you determine the orientation of the specimen by which highly magnified viewof the flagellates chamber? Under whcich conditions could you see both cross sections and longitudinal sections through the flagellated chamber in the same specimen? See BB p.55.	Hi Power C.S. (from Survey of Invertebrates (Zool250), University of Alberta; image copyright © Ron Koss & A. Richard Palmer, used with permission) A. Choanocytes, B. pinacoderm, C-spicules, D-flagellated chambers, E-ostia, F-incurrent canal; external surface of the sponge is to the top
	low power cross section from Survey of Invertebrates (Zool250), University of Alberta; image copyright © Ron Koss & A. Richard Palmer, used with permission) A. Choanocytes, B- pinacoderm, C. spicules, D-flagellated chambers; external surface of the sponge is to the top.