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.53" Pyritized Triarthrus Trilobite With Appendages & Eggs - New York
This is a very detailed, dorsally preserved specimen with legs and antennae. It measures approximately .53" and is located on a 3.9 x 2.7" piece of shale. Included with your specimen is a printed copy of the cropped in photo seen above.
Trilobites from a single layer of the a quarry in the Whetstone Gulf Formation of New York, were found to have associated eggs still in place. The eggs are spherical to elliptical in shape, about 200 µm in size, and are clustered in the genal area of the cephalon. The location of the eggs is consistent with where modern female horseshoe crabs release their unfertilized eggs.
Trilobites from a single layer of the a quarry in the Whetstone Gulf Formation of New York, were found to have associated eggs still in place. The eggs are spherical to elliptical in shape, about 200 µm in size, and are clustered in the genal area of the cephalon. The location of the eggs is consistent with where modern female horseshoe crabs release their unfertilized eggs.
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.
SPECIES
Triarthrus eatoni
AGE
LOCATION
Lewis County, New York
FORMATION
Frankfort Formation - Lorraine Group
SIZE
Trilobite .53" on 3.9 x 2.7" shale
CATEGORY
SUB CATEGORY
ITEM
#350374
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