Montastrea annularis (fossil coral) (Key Largo Limestone, Upper Pleistocene; Stock Island, Florida, USA) 1

Montastrea annularis (Ellis & Solander, 1786) - fossil coral from the Pleistocene of Florida, USA. (plan view)

This species is also known as Orbicella annularis.

Scleractinians are significant reef-building organisms in Earth's warm, shallow oceans. They first appear in the Triassic and are the only group of stony corals in modern oceans (in the Paleozoic, tabulates and rugosans were the principal stony coral groups). Scleractinian corals consist of individuals or colonies of gelatinous polyps that secrete hard calcareous (CaCO3) skeletons. Most live in warm, tropical to subtropical, photic zone environments (the shallow portions of the world’s oceans where sunlight penetrates). Scleractinian corals are predators - they have stinging cells (nematocysts) in their tentacles that paralyze prey. They also obtain sustenance from microbes called zooxanthellae (usually dinoflagellates) that live in their tissues and need to be in sunlight to manufacture food by photosynthesis. The food is shared with the host coral.

Classification: Animalia, Cnidaria, Anthozoa, Hexacorallia, Scleractinia, Merulinidae

Stratigraphy: Key Largo Limestone, Marine Isotope Stage 5e, Upper Pleistocene, ~119-131 ka

Locality: unrecorded / undisclosed site on Stock Island, just east of Key West, far-southern Florida, USA
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Info. at:
en.wikipedia.org/wiki/Orbicella_annularis

Some rights reserved

Taken on: October 18, 2024

Tags:

Montastrea

annularis

fossil

coral

corals

scleractinian

scleractinians

Key

Largo

Limestone

Pleistocene

MIS

Marine

Isotope

Stage

Stock

Island

Florida

Keys

Orbicella « less

Sets appears in: • Florida Rocks & Fossils • Scleractinian Corals more » • Pleistocene Rocks & Fossils • Coral Fossils « less

Stats: 99 views

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