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Arthroacantha carpenteri, Corocrinus calypso |
Arkona formation |
Mike Topor |
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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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Eldredgeops milleri, Devonaster triradiatus |
Arkona formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: Prone, nearly complete, trilobites are very rare for the Arkona Formation. Add a complete even rarer small starfish abutting the trilobite and you have a unique specimen. The trilobite measures 40mm x 25mm and the starfish is 22mm in diameter.
Photo title: Trilobite–Starfish Association
Taxa present: Eldredgeops milleri, Devonaster triradiatus
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Ancyrocrinus bulbosus |
Arkona formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: Ancyrocrinus holdfasts are considered uncommon in the shale. This specimen retains two of the anchor points and a portion of the stem is attached. The square stem is a feature of this crinoid species. The length of the holdfast and stem is 78mm. The anchor points are approx. 35mm long.
Photo title: Crinoid Holdfast
Taxa present: Ancyrocrinus bulbosus
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Ancyrocrinus bulbosus |
Arkona formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: Only three of these extremely rare crinoids are known. They may belong to A. bulbosus but further study is needed to determine that at the species level. The calyx measures 15mm x 11mm.
Photo title: Crinoid Calyx
Taxa present: Ancyrocrinus bulbosus
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Gondekia hastula |
Hungry Hollow formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Hungry Hollow formation
Submitter notes: These very rare sponges from the Hungry Hollow mb. are somewhat saucer-shaped and covered with smooth spicules. The slab measures 40mm x 35mm.
Photo title: Sponge (Porifera)
Taxa present: Gondekia hastula
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Arkonips topororum Type Specimen |
Arkona formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: This soft-bodied, preserved in three dimensions in pyrite, polychaete worm may just be the rarest fossil found in the Arkona formation. The annelid measures 40mm in length.
Photo title: Polychaete Worm (Annelid)
Taxa present: Arkonips topororum
UMMP specimen number: holotype
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Dolatocrinus liratus, Naticonema lineata |
Hungry Hollow formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Hungry Hollow formation
Submitter notes: Evan Topor found this large crinoid calyx. The find was made even better when the large gastropod was uncovered alongside it. The crinoid is 27mm in diameter and the gastropod is 34mm in diameter. The slab is 88mm x 57mm.
Photo title: Crinoid Calyx and Gastropod
Taxa present: Dolatocrinus liratus, Naticonema lineata
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Conularia sp. |
Arkona formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: These cone-shaped (always flattened in the Arkona formation) fossils had a very thin phosphatic shell. Difficult to collect in one piece and very rare in the formation, their exact placement is still being debated but placement seems to favor their own phylum. It is believed they were able to attach themselves to shells or other material on the sea floor and cluster in a group. This partial specimen is 125mm tall x 120mm at greatest width.
Photo title: Conularid
Taxa present: Conularia sp.
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Krama devonicum |
Arkona formation |
Mike Topor |
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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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Arthroacantha carpenteri |
Arkona formation |
Mike Topor |
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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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Fenestella arkonensis |
Hungry Hollow formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Hungry Hollow formation
Submitter notes: The checklist of fossils from the area lists four different species of Fenestella from the Hungry Hollow mb. Most bryozoa are difficult to identify and require thin sectioning for positive I.D. I can identify only by sight. This specimen nearly covers the slab measuring 79mm x59mm.
Photo title: Bryozoan
Taxa present: Fenestella arkonensis
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Fenestella arkonensis |
Hungry Hollow formation |
Mike Topor |
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Submitted on 2008-03-30 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Hungry Hollow formation
Submitter notes: The checklist of fossils from the area lists four different species of Fenestella from the Hungry Hollow mb. Most bryozoa are difficult to identify and require thin sectioning for positive I.D. I can identify only by sight. This specimen is 40mm high and 35mm wide and rests on a slab 42mm x 60mm.
Photo title: Bryozoan
Taxa present: Fenestella arkonensis
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Eridophyllum subcaespitosum |
Hungry Hollow formation |
Mike Topor |
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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 colony showing the nature of the cups. The specimen measures 51mm x 39mm.
Photo title: Colonial Coral
Taxa present: Eridophyllum subcaespitosum
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Eridophyllum archiaci |
Hungry Hollow formation |
Mike Topor |
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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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Taeniopora exigua |
Hungry Hollow formation |
Mike Topor |
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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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Atrypa reticularis |
Hungry Hollow formation |
Mike Topor |
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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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Callipleura nobilis |
Hungry Hollow formation |
Mike Topor |
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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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Athyris spiriferoides |
Hungry Hollow formation |
Mike Topor |
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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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Cryptonella attenuata |
Hungry Hollow formation |
Mike Topor |
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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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Nucleospira concinna |
Hungry Hollow formation |
Mike Topor |
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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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