Acrotretida

The Acrotretida are a group of sessile, suspension-feeding brachiopods known from the Cambrian period and surviving until the present day. ^[1]

5 relations: Brachiopod, Cambrian, Filter feeder, Phosphatic fossilization, Sessility (motility).

Brachiopod

Brachiopods, phylum Brachiopoda, are a group of lophotrochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs.

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Cambrian

The Cambrian Period was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon.

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Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure.

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Phosphatic fossilization

Phosphatic fossilization has occurred in unusual circumstances to preserve some extremely high-resolution microfossils in which careful preparation can even reveal preserved cellular structures.

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Sessility (motility)

In biology, sessility (in the sense of positional movement or motility) refers to organisms that do not possess a means of self-locomotion and are normally immobile.

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Acrotretid.

References

[1] https://en.wikipedia.org/wiki/Acrotretida

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