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): 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: 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: 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 2025-09-03 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): 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 2025-07-18 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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Submitted on 2025-05-30 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: None

Photo title: Mucrospirifer encrusted with Bryozoan

Taxa present: Mucrospirifer prolificus, Fistulipora

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Submitted on 2025-05-30 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The pyritized lophophore is exposed

Photo title: Pyritized Paraspirifer Lophophore

Taxa present: Paraspirifer bownockeri

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Submitted on 2025-05-30 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Dundee formation

Submitter notes: None

Photo title: Rostroconch

Taxa present: Conocardium cuneas

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Submitted on 2024-09-07 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This brachiopod is encrusted with bryozoan

Photo title: Brachiopod with Bryozoan

Taxa present: Fistulipora , Pseudoatrypa

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Submitted on 2024-09-07 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This solitary coral is encrusted with bryozoan

Photo title: Solitary Coral

Taxa present: Fistulipora , Heliophyllum halli

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Submitted on 2024-09-07 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Perfectly enrolled trilobite

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

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Submitted on 2024-03-20 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Speciman measure about 6.0 cm

Photo title: Trilobite - Eldredgeops milleri

Taxa present: Eldredgeops milleri

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Submitted on 2024-03-20 by Mary Ann Szwabowski

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This brachiopod is encrusted with a peacock colored pyrite and measures 5.0 cm.

Photo title: Pyritized Brachiopod

Taxa present: Paraspirifer bownockeri

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Submitted on 2024-02-11 by Michael Lask

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: 55 mm

Photo title: Eldredgeops crassituberculata

Taxa present: Eldredgeops crassituberculata

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Submitted on 2024-02-11 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Squaw Bay formation

Submitter notes: 29 mm across. Collected by Patricia Rutkowski. Prepared by Scott Vergiels.

Photo title:

Taxa present: Koenenites cooperi

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