Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: These gastrointestinal mandibles are very rare in the Arkona formation as are any parts of this animal. It measures 16mm in length.

Photo title: Phyllocarid Mandibles

Taxa present: Echinocaris punctata

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: Top view: This is a rare occurance of a brachiopod totally encrusted with a branching Bryozoan. It may well have been caused by a reworked environment. The specimen measures 52mm in length and 19mm at the widest point.

Photo title: Bryozoan Encrusted Brachiopod

Taxa present: Leptotrypella quadrangularis, Mucrospirifer arkonensis

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: Bottom view: This is a rare occurance of a brachiopod totally encrusted with a branching Bryozoan. It may well have been caused by a reworked environment. The specimen measures 52mm in length and 19mm at the widest point.

Photo title: Bryozoan Encrusted Brachiopod

Taxa present: Leptotrypella quadrangularis, Mucrospirifer arkonensis

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: A common fossil in the Widder formation. Although these are nice plump specimens, most are not. The largest specimen of the four measures 28mm X 25mm. (Formerly known as Leiorhynchus)

Photo title: Brachiopod

Taxa present: Eumetabolotoechia cf. multicostum

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This brachiopod is common in the formation. They attach to many different species of corals. All are single valves. The largest brachiopod in the photo measures 41mm X 34mm.

Photo title: Inarticulate Brachiopod

Taxa present: Petrocrania hamiltoniae

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: A highly pyritized and nearly complete straight cephalopod collected on matrix. This common species is rarely found on matrix. It measures about 40mm in length.

Photo title: Cephalopod

Taxa present: Bactrites arkonensis

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Due to the rarity of fragments in the H.H. member this echinoid remains undescribed. This good specimen shows parts of the lantern(oral opening) in the lower half of the photo. The specimen measures 40mm X 40mm.

Photo title: Echinoid

Taxa present: Undescribed sp.

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: View 1: Although never formally described to the species level, this very rare crinoid from the Arkona formation is similar to the Silica formation species. It measures 20mm high and 11mm wide.

Photo title: Crinoid

Taxa present: Euryocrinus laddii

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: View 2: Although never formally described to the species level, this very rare crinoid from the Arkona formation is similar to the Silica formation species. It measures 20mm high and 11mm wide.

Photo title: Crinoid

Taxa present: Euryocrinus laddii

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: View 1: The only specimen of this cladid crinoid I found in the H.H. member in over thirty years of collecting. It measures 19mm high and 12.5mm wide.

Photo title: Crinoid Calyx

Taxa present: Decadocrinus multidosus

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: View 2: The only specimen of this cladid crinoid I found in the H.H. member in over thirty years of collecting. It measures 19mm high and 12.5mm wide.

Photo title: Crinoid Calyx

Taxa present: Decadocrinus multidosus

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Submitted on 2008-11-06 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: A rare crinoid crown from the lower Widder formation. The specimen measures 40mm high and is 16.5mm wide.

Photo title: Crinoid Crown

Taxa present: Eutaxocrinus whiteavesi

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Submitted on 2008-11-07 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: A spectacular plate with two complete crinoid crowns. In additon, there is another Arthroacantha and a Poteriocrinus on the bottom half of this plate (see next photo). There are also several Arthroacantha crowns on the back of this plate. It is 9 inches across the two crowns.

Photo title: Crinoid crowns

Taxa present: Arthroacantha carpenteri

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Submitted on 2008-11-07 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This is the bottom half of the plate with the two Arthrocantha crowns. On the bottom half are two additional crinoids.

Photo title: Crinoid crowns

Taxa present: Arthroacantha carpenteri, Poteriocrinus arkonensis

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Submitted on 2008-11-07 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: Another spectacular individual crinoid crown. This crown is 4.5 inches tall.

Photo title: Crinoid crown

Taxa present: Arthroacantha carpenteri

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Submitted on 2008-11-07 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This piece contains three crinoid crowns and a very large conularid.

Photo title: Crinoid crowns with a Conularid

Taxa present: Arthroacantha carpenteri, Conularia sp.

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This crinoid with crown and stem was preserved at the bottom of a channel and was covered by Bryozoa. This was revealed after the fronds of bryozoans were removed.

Photo title: Crinoid with stem and arms

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes:

Photo title: A more detailed view

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This shows the curved nature of the matrix in which the crinoid was washed(?) and covered with additional matrix to preserve all.

Photo title: Third view showing the 'pipe' in which the crinoid was preserved.

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: These were from bioherm areas of the Alpena Limestone

Photo title: Series of crinoid calyxes graded in size, tegmen view

Taxa present: Dolatocrinus asterias

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