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.45" Pyritized Triarthrus Trilobite With Appendages & Ostracod
About Pyritized Triarthrus Trilobites
Localities capable of preserving trilobites with soft-bodied anatomy are extraordinarily rare. Among the most famous of these is the historic Beecher’s Trilobite Bed, part of the Upper Ordovician Lorraine Group of New York, from which this specimen originates.
Beecher’s Trilobite Bed is renowned for its exceptional preservation, capturing details far beyond the typical mineralized exoskeletons seen at most fossil sites. Under unique conditions of rapid burial and oxygen-depleted (anoxic) seafloor sediments, trilobites and other organisms were sealed off from decay and scavenging almost instantly.
In this environment, soft tissues—normally lost to time—were chemically replaced by pyrite (iron sulfide) in a process known as pyritization. This remarkable mode of preservation records fine anatomical details such as limbs, antennae, digestive structures, and other soft-bodied features rarely seen in the trilobite fossil record.
Localities capable of preserving trilobites with soft-bodied anatomy are extraordinarily rare. Among the most famous of these is the historic Beecher’s Trilobite Bed, part of the Upper Ordovician Lorraine Group of New York, from which this specimen originates.
Beecher’s Trilobite Bed is renowned for its exceptional preservation, capturing details far beyond the typical mineralized exoskeletons seen at most fossil sites. Under unique conditions of rapid burial and oxygen-depleted (anoxic) seafloor sediments, trilobites and other organisms were sealed off from decay and scavenging almost instantly.
In this environment, soft tissues—normally lost to time—were chemically replaced by pyrite (iron sulfide) in a process known as pyritization. This remarkable mode of preservation records fine anatomical details such as limbs, antennae, digestive structures, and other soft-bodied features rarely seen in the trilobite fossil record.
This is a very detailed, dorsally preserved specimen with legs and antennae. It measures approximately .45" and is located on a 4.1 x 2.3" slab of shale. There is a fossil Ostracod laying just in front of its head.
Included with your specimen is a printed copy of the cropped in photo seen above.
About Trilobites
Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet: over 25,000 species have been described, filling nearly every evolutionary niche. Due in large part to their hard exoskeletons (shells), they left an excellent fossil record.
Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet: over 25,000 species have been described, filling nearly every evolutionary niche. Due in large part to their hard exoskeletons (shells), they left an excellent fossil record.
SPECIES
Triarthrus eatoni
AGE
LOCATION
Lewis County, New York
FORMATION
Frankfort Formation - Lorraine Group
SIZE
Trilobite .45" on 3.3 x 2.4" shale
CATEGORY
SUB CATEGORY
ITEM
#309855
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