Hallirhoidae
Hallirhoidae is an extinct family of heteroscleromorph demosponges found throughout the world from the Cretaceous to the Eocene, whereupon they became extinct. The highest concentration of species occurred in the Tethys Ocean during the upper Cretaceous. The hallirhoid demosponges were very distinctive-looking, largely pear-shaped sponges that were attached to the seafloor by a long stem-like stalk.
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Hallirhoidae
Hallirhoidae is an extinct family of heteroscleromorph demosponges found throughout the world from the Cretaceous to the Eocene, whereupon they became extinct. The highest concentration of species occurred in the Tethys Ocean during the upper Cretaceous. The hallirhoid demosponges were very distinctive-looking, largely pear-shaped sponges that were attached to the seafloor by a long stem-like stalk.
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Hallirhoidae is an extinct fam ...... oor by a long stem-like stalk.
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1,010,941,188
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fossil range
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Various Cretaceous Hallirhoiids
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subdivision
*Hallirhoa
*Siphonia
*Callopegma
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Genera
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taxon
Hallirhoidae
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Hallirhoidae is an extinct fam ...... oor by a long stem-like stalk.
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Hallirhoidae
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