Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This trilobite is 5.2 cm tall.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: These guys are each about a inch long.

Photo title: Pair of trilobites

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Specimen is 6.5 cm top to bottom.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This trilobite is 5.7 cm across.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: And another large specimen. This specimen measures 4.7 cm across the cephalon.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: Another large specimen. This one also measures 4.5 cm across the cephalon.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: This specimen is not as large as the previous but is still a very large specimen for this site. The trilobite measures 4.5 cm across the cephalon.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: One of the largest trilobites found at this site. The trilobite measures 5.3 cm across the cephalon.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The trilobites measure 1.8 cm each.

Photo title: Trilobites

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: This trilobite is 7.7 cm which is considered quite large.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: These two trilobites are in the position as found and on the matrix they were found in. Both can be removed for examination and placed back into their natural setting. It is 6.5 cm across the two specimens.

Photo title: Trilobites

Taxa present: Eldredgeops crassituberculata

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This specimen is 5.3 cm tall.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: The trilobite is 4.3 cm tall

Photo title: Trilobite with Brachiopod

Taxa present: Eldredgeops milleri, Strophodonta sp.

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: The trilobite is 4.7 cm.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is 5 cm tall. This specimen is one of those rare inflated specimen that are occasionally found. It was also found sitting on a piece of marcasite surrounded by softer shale.

Photo title: Trilobite

Taxa present: Eldredgeops milleri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes:

Photo title:

Taxa present: Eldredgeops rana

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The crown of the crinoid is 5 cm tall.

Photo title: Crinoid and Trilobite

Taxa present: Eldredgeops milleri, Arthroacantha carpenteri

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Submitted on 2025-09-03 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes:

Photo title: Trilobites with Gastropod and Blastoid

Taxa present: Platyceras sp., Hyperoblastus sp., Pseudodechenella arkonensis

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Submitted on 2025-07-18 by John Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: Formally Atractocrinus. Occurs in the upper Arkona Formation. It is usually found as just a calyx and rarely with a tegmen. Only one known specimen is preserved with a small amount of arms. The center specimen is 22mm tall. See scale in photo for size.

Photo title: Crinoid Calyxes

Taxa present: Atelestocrinus concinnus

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Submitted on 2025-06-07 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This speciman is a crusher tooth plate

Photo title: Fish Tooth

Taxa present: ptyctodont

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