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Brachiopod Fossil

PRODUCT TYPE: Fossil

This ribbed shell is a fossil of the order Rhynchonellida.

These brachiopods have existed since the Ordovician period 485 million years ago. Their population was severely diminished during the Permian–Triassic extinction event 252 million years ago, but Rhynchonellida became the most abundant brachiopod group during the Mesozoic.

This group is identifiable by their deep ribbed surfaces and short hinges, which usually come to a point. These bivalves were the first to evolve teeth sockets, which help to align the two halves as they close and make it harder for a predator to open the shell by twisting the valves.

It is hypothesized that the radiating ribbed pattern helps regulate the flow of water in and out of the shell.

This fossil is millions of years old, but this order still exists today, albeit not nearly as abundant as they once were.

Location: Morocco

Age: ~70 million years (Late Cretaceous) 

Size: < 10g

Please note: This listing is for one brachiopod fossil. Photos shown are representative of what you will receive, please allow for variation. 

$12.00

Mesozoic

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Brachiopod Fossil

Mesozoic

FOSSIL DETAILS
TIME SCALE
further research
online resources
informational video
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FOSSIL DETAILS

Specimen: Brachiopod Fossil

Genus/Species: Rhynchonellida
Era: Late Cretaceous
Age: 70 Ma
Location: Morocco
Size: .5"-1"

Notes:

TIME SCALE

This table contains the geological time periods of the past 2.5 billion years on Earth to aid in understanding age immense age of these fossils.

(Ma = Mega-annum = 1,000,000 years)
EON ERA PERIOD EXTENT (Ma) DURATION (Ma)
Phanerozoic Cenozoic Quaternary 2.588–Present 2.588+
Neogene 23.03–2.588 20.4
Paleogene 66.0–23.03 42.9
Mesozoic Cretaceous 145.5–66.0 79.5
Jurassic 201.3–145.0 56.3
Triassic 252.17–201.3 50.9
Paleozoic Permian 298.9–252.17 46.7
Carboniferous 358.9–298.9 60
Devonian 419.2–358.9 60.3
Silurian 443.4–419.2 24.2
Ordovician 485.4–443.4 42
Cambrian 541.0–485.4 55.6
Proterozoic Neoproterozoic Ediacaran 635.0–541.0 94
Cryogenian 850–635 215
Tonian 1,000–850 150
Mesoproterozoic Stenian 1,200–1,000 200
Ectasian 1,400–1,200 200
Calymmian 1,600–1,400 200
Paleoproterozoic Statherian 1,800–1,600 200
Orosirian 2,050–1,800 250
Rhyacian 2,300–2,050 250
Siderian 2,500–2,300 200
further research
BRACHIOPOD

This ribbed shell is a fossil of the order Rhynchonellida.

These brachiopods have existed since the Ordovician period 485 million years ago. Their population was severely diminished during the Permian–Triassic extinction event 252 million years ago, but Rhynchonellida became the most abundant brachiopod group during the Mesozoic.

This group is identifiable by their deep ribbed surfaces and short hinges, which usually come to a point. These bivalves were the first to evolve teeth sockets, which help to align the two halves as they close and make it harder for a predator to open the shell by twisting the valves.

It is hypothesized that the radiating ribbed pattern helps regulate the flow of water in and out of the shell.

This fossil is millions of years old, but this order still exists today, albeit not nearly as abundant as they once were.

informational video
CUSTOMER REVIEWS

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Brachiopod Fossil

Brachiopod Fossil

$12.00
Mesozoic