Second Great Period of Marine Life (Part Thirty)

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Around 310,000,000 years ago, the animals that existed during this time period were marine organisms. No land animals had yet appeared except a few types of worms which burrowed along the seashores, nor had the land plants yet overspread the continents. There was still too much carbon dioxide in the air to permit of the existence of air breathers. Primarily, all animals except certain of the more primitive ones are directly or indirectly dependent on plant life for their existence.

The trilobites were still prominent. These little animals existed in tens of thousands of patterns and were the predecessors of modern crustaceans.

There was a widespread, lime-secreting algae along with thousands of species of the early ancestors of the corals. Sea worms were abundant, and there were many varieties of jellyfish which have since become extinct. Corals and the later types of sponges also evolved along with cephalopods becoming well-developed and what has survived from this time period are the modern, pearly nautilus octopus, cuttlefish, and squid.

The gastropods were present in the waters of the ancient seas, and they included single-shelled drills, periwinkles, and snails. The bivalve gastropods have come on down through the intervening millions of years much as they then existed and embrace the mussels, clams, oysters, and scallops. The valve-shelled organisms also evolved, and these brachiopods lived in those ancient waters much as they exist today; they even had hinged, notched, and other sorts of protective arrangements of their valves.

(In Memory of Dad)
Quote: He that will not command his thoughts will soon lose command of his actions. Bishop Wilson

Check out Ms. Oberne’s work-in-progress, “The Birth of Jesus and Beyond.” FREE to READ. https://www.inkitt.com/stories/640601