Phylum: Bryozoa
Class: Stenolaemata
Order: Trepostomatida
Family: Atactotoechidae (Duncan, 1939)
Cincinnatian Genera: Cyphotrypa, Leptotrypa

Geologic Range
Ordovician- Devonian

Common Paleoecology
Atactotoechidae is an extinct family of colonial epifaunal suspension feeders

Description of the Family

  • Ramose to massive zoaria
  • Angular zoaria that have laminated amalgamate walls
  • Straight diaphragms or gently curved cystiphragms
  • Absence of mesopores
  • Acanthopores composed of nongranular laminated tissue
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Treatise on Invertebrate Paleontology (1953):

  • Zoaria ramose to massive. Zooecia angular, with laminated amalgamate walls which are granular only in early mature region; straight diaphragms or gently curved cystiphragms. Mesopores absent; acanthopores of nongranular laminated tissue.

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