Fissispongia Sponge Fossil.jpg
By Dpaul7
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Fissispongia Sponge Fossil
SITE LOCATION: Wise County, Texas, USA
TIME PERIOD: Pennsylvanian Period (299-323 Million Years ago)
Data: Agelasida is an order of demosponges in the subclass Heteroscleromorpha. Sponges, the members of the phylum Porifera (meaning "pore bearer"), are the sister of the ParaHoxozoa or Epitheliozoa with which they form a basal animal clade, the Parazoa. The other basal animal clade are the Ctenophora. They are multicellular parazoan organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes.
Kingdom: Animalia
Phylum: Porifera
Class: Demospongea
Order: Agelasida
Family: †Fissispongiidae
Genus: †Fissispongia
Photo Information
- Taken with Canon Canon PowerShot SX120 IS
- Focal Length 7.3 mm
- Exposure Time 1/60
- f Aperture f/3.2
- ISO Speed 80
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