Submitted on 2008-03-23 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This crinoid is 10 cm including the stem.

Photo title: Crinoid

Taxa present: Dolatocrinus sp.

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Submitted on 2008-03-23 by Joseph Koniecki

Location (approximate): Thedford, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This crinoid is 3.5 cm across.

Photo title: Crinoid calyx

Taxa present: Megistocrinus rugosus

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Submitted on 2008-03-23 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: The larger specimen is 5.5 cm across.

Photo title: Coral

Taxa present: Heterophrentis sp.

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Submitted on 2011-01-05 by Joseph Koniecki

Location (approximate): Thedford, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This crinoids is 4.3 cm tall including the stem

Photo title: Crinoid

Taxa present: Gennaeocrinus mourantae

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Submitted on 2008-03-23 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This coral specimen is 6 cm across.

Photo title: Coral

Taxa present: Aulocystis ramosa

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Submitted on 2008-03-23 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This a very nice specimen showing a crinoid crown with two gastropods attached. The spines on the crinoid calyx are still attached. The very long spines of the gastropods are still in place. In addition, there is bryozoan in place on the gastropod (photo is in next datapoint entry). This specimen is 14 cm across from arm tip to arm tip.

Photo title: Crinoid with gastropods

Taxa present: Platyceras arkonense, Arthroacantha carpenteri, Sulcoretepora sp.

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Submitted on 2008-03-23 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This is view two of the previous entry. This photo shows the bryozoan which was growning on the gastropod that was living on the crinoid. The bryozoan is only 1 cm tall. See previous entry for view of crinoid with gastropods.

Photo title: Bryozoan on gastropod on crinoid

Taxa present: Spiniplatyceras arkonense, Sulcoretepora sp., Arthroacantha carpenteri

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Submitted on 2008-03-29 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: A very nice specimen of a bryozoan attached to a coral. Additional, unnamed bryozoans lie around the main specimen. The bryozoan is 4 cm including the base.

Photo title: Bryozoan

Taxa present: Reteporina striata

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Submitted on 2008-03-29 by Joseph Koniecki

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is 3 cm tall.

Photo title: Gastropod

Taxa present: Spiniplatyceras arkonense

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Submitted on 2008-03-29 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: The bryozoan is 6.5 cm tall.

Photo title: Bryozoan and Trilobite

Taxa present: Leptotrypella ohioensis, Phacops rana crassituberculata

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Submitted on 2008-03-29 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: Phacops rana crassituberculata

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Submitted on 2008-03-29 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: Phacops rana crassituberculata

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: One of the rarer blastoids occurring in the Hungry Hollow Fm., Its distinctive features include striations and bumps on the radials as well as highly ornamented basals. The largest of the pictured specimens measures 16mm in height and the smallest is 14.8mm tall.

Photo title: Blastoid

Taxa present: Hyperoblastus cummingsi

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: One of the rarest of all blastoids in any of the formations in the Arkona-Thedford area, this inflated specimen on matrix is 17.8mm tall and 9mm at the widest point.

Photo title: Blastoid

Taxa present: Pleuroschisma lycorias

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Thedford, Lambton, ON

Strat unit: Widder formation

Submitter notes: This cluster of small blastoids is from the Rock Glen Sub member beds of the Widder Formation. Small size is typical for this un-described species, although it is closely equivalent stratigraphically (slightly higher) to the New York species H. goldringae. All of the specimens are 5-6mm in height and are on the large side. Most specimens are smaller.

Photo title: Blastoid

Taxa present: Hyperoblastus sp.

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: A very rare crinoid calyx. The larger specimen measures 12mm x 9mm and the smaller is 7.5mm x 8.5mm.

Photo title: Crinoid Calyx

Taxa present: Pyrenocrinus berryorum

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This camerate crinoid is slightly rarer than Dolatocrinus or Megistocrinus in the formation. Some specimens can be heavily pyritized. This partial crown measures 43mm high, 36mm wide and the calyx is about 14mm in diameter.

Photo title: Partial Crinoid Crown

Taxa present: Gilbertsocrinus spinigerus

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: One of my favorite crinoids from our collection, just the way it is splayed out makes it a very nice specimen. It measures 103mm x 68mm.

Photo title: Crinoid Crown

Taxa present: Arthroacantha carpenteri

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: Two small Corocrinus crowns, each with a tiny Platyceras attached in this very typical manner. This species of snail seems to favor only Corocrinus. Note: dime for scale.

Photo title: Tiny Crinoid Crowns with Gastropods

Taxa present: Corocrinus calypso, Platyceras sp.

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: A small Arthroacantha crown with a tiny Corocrinus nestled in its arms. Note: dime for scale.

Photo title: Tiny Crinoid Crowns

Taxa present: Arthroacantha carpenteri, Corocrinus calypso

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