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: 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): 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: 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): 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: Arkona formation

Submitter notes: This beautiful large edrioasteroid is attached to a pelecypod and is incredibly rare in the formation. This specimen is 22mm in diameter.

Photo title: Edrioasteroid

Taxa present: Krama devonicum

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: A complete crown preserved in a starburst position and very heavily pyritized except for some of the arm tips. The calyx is covered with spines. This specimen measures 41m x 47mm.

Photo title: Pyritized 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: This website contains photos of beautifully preserved Decorocrinus crowns. This pair of partial crowns shows the nature of the ornamentation on the calyx. The pair of crowns covers an area measuring 42mm x 38mm.

Photo title: Partial Crinoid Crowns

Taxa present: Decorocrinus arkonensis

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This un-described plant material can occur throughout the exposed Arkona Formation but is more common in certain horizons. Plump specimens are needed to show internal cell structure upon sectioning. In the photo, the widest specimen measures 25mm wide x 32mm long. The longest specimen is 42mm long x 17mm wide.

Photo title: Fossil Wood

Taxa present: Unknown sp.

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This small brachiopod is rare in the formation except in certain horizons. The average size in the photo is 13mm x 8mm tall.

Photo title: Brachiopod

Taxa present: Cyrtina arkonensis

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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 small brachiopod with a distinctive triangular shape that is common in the formation. The largest of the 11 specimens in the photo measures 11mm x 7mm and is 9.5mm high. The smallest is 4mm x 5.5mm and 4mm high.

Photo title: Brachiopod

Taxa present: Cyrtina coultisorum

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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 brachiopod is not common in the formation. A very fragile thin shell makes collecting whole specimens difficult. This beauty has a holdfast attached to it and nearby rests a smaller Pholidostrophia brachiopod. The larger brachiopod measures 35mm x 31mm.

Photo title: Brachiopod

Taxa present: Protoleptostrophia perplana, Pholidostrophia nacrea

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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 uncommon brachiopod requires a bit of searching in the formation. The photo specimens average 18mm x 16mm and are about12mm thick.

Photo title: Brachiopod

Taxa present: Parazyga hirsuta

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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 little brachiopod has a smooth surface and is somewhat common in the formation. The largest specimen in the photo measures 13mm x 12mm.

Photo title: Brachiopod

Taxa present: Nucleospira concinna

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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 small, distinctive brachiopod is common in the formation. They average 11mm long and 6.5mm at the widest point.

Photo title: Brachiopod

Taxa present: Cryptonella attenuata

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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 common brachiopod found in the formation. The smaller measures 16mm x 16mm and the larger 23mm x 18mm.

Photo title: Brachiopod

Taxa present: Athyris spiriferoides

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Submitted on 2008-03-30 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Most specimens of this brachiopod are somewhat flattened. Plump specimens are rare. The bottom row specimens in the photo each measure 31mm x 23mm. The top one measures 19mm wide and 13mm thick.

Photo title: Brachiopod

Taxa present: Callipleura nobilis

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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 common brachiopod found in the formation. The smaller measures 29mm x 29mm and the larger 32mm x 31mm.

Photo title: Brachiopod

Taxa present: Atrypa reticularis

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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 bryozoa has a distinctive branching pattern. Not rare in the formation but hard to find large specimens as most are fragmented. These small slabs measure about 30mm in diameter.

Photo title: Bryozoan

Taxa present: Taeniopora exigua

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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 large colony was attached to the hardground uppermost surface of the Encrinal limestone just below the coral zone. The size of this coral colony measures 9in. x 9in.

Photo title: Colony Coral

Taxa present: Eridophyllum archiaci

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