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Protitanichthys cf. rockportensis |
Arkona formation |
Mike Topor |
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Submitted on 2008-11-06 by Mike Topor
Location (approximate): Arkona, Lambton, ON
Strat unit: Arkona formation
Submitter notes: A typical fish plate from this formation. This one is on a concretion. Most fish material is fragmentary. This specimen measures 83mm X 62mm.
Photo title: Armored Fish Plate
Taxa present: Protitanichthys cf. rockportensis
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Echinocaris punctata |
Arkona formation |
Mike Topor |
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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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Leptotrypella quadrangularis, Mucrospirifer arkonensis |
Arkona formation |
Mike Topor |
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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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Leptotrypella quadrangularis, Mucrospirifer arkonensis |
Arkona formation |
Mike Topor |
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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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Eutaxocrinus whiteavesi |
Widder formation |
Mike Topor |
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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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Decadocrinus multidosus |
Hungry Hollow formation |
Mike Topor |
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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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Decadocrinus multidosus |
Hungry Hollow formation |
Mike Topor |
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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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Euryocrinus laddii |
Arkona formation |
Mike Topor |
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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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Euryocrinus laddii |
Arkona formation |
Mike Topor |
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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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Undescribed sp. |
Hungry Hollow formation |
Mike Topor |
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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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Bactrites arkonensis |
Arkona formation |
Mike Topor |
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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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Petrocrania hamiltoniae |
Hungry Hollow formation |
Mike Topor |
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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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Eumetabolotoechia cf. multicostum |
Widder formation |
Mike Topor |
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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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Ambocoelia umbonata
Type Specimen |
Silica formation |
ummp invertebrate paleontology |
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Submitted on 2008-11-03 by ummp invertebrate paleontology
Location (approximate): Milan, Washtenaw, MI
Strat unit: Silica formation
Submitter notes: These brachiopods are a hypotype. The largest is 1 cm across. The label on these specimens indicates that the locality is unknown. The locality would have to be either Milan or Sylvania. I have entered Milan only because the database requires a locality.
Photo title: Brachiopods
Taxa present: Ambocoelia umbonata
UMMP specimen number: hypotype 61273 A-F
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Athyris vittata
Type Specimen |
Silica formation |
ummp invertebrate paleontology |
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Submitted on 2008-11-03 by ummp invertebrate paleontology
Location (approximate): Milan, Washtenaw, MI
Strat unit: Silica formation
Submitter notes: See view #1 for additional information.
Photo title: Blastoid - View #2
Taxa present: Athyris vittata
UMMP specimen number: hypotype 61030
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Athyris vittata
Type Specimen |
Silica formation |
ummp invertebrate paleontology |
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Submitted on 2008-11-03 by ummp invertebrate paleontology
Location (approximate): Milan, Washtenaw, MI
Strat unit: Silica formation
Submitter notes: This brachiopod is a hypotype. It is 2.7 cm across.
Photo title: Brachiopod - View #1
Taxa present: Athyris vittata
UMMP specimen number: hypotype 61030
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Amphigenia elongata
Type Specimen |
Bois Blanc formation |
ummp invertebrate paleontology |
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Submitted on 2008-11-03 by ummp invertebrate paleontology
Location (approximate): , Mackinac, MI
Strat unit: Bois Blanc formation
Submitter notes: See view #1 for additional information.
Photo title: Brachiopod - View #2
Taxa present: Amphigenia elongata
UMMP specimen number: hypotype 23593
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Amphigenia elongata
Type Specimen |
Bois Blanc formation |
ummp invertebrate paleontology |
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Submitted on 2008-11-03 by ummp invertebrate paleontology
Location (approximate): , Mackinac, MI
Strat unit: Bois Blanc formation
Submitter notes: This specimen is a hypotype. It is 4.3 cm across.
Photo title: Brachiopod - View #1
Taxa present: Amphigenia elongata
UMMP specimen number: hypotype 23593
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Amphigenia elongata
Type Specimen |
Bois Blanc formation |
ummp invertebrate paleontology |
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Submitted on 2008-11-03 by ummp invertebrate paleontology
Location (approximate): , Charlevoix, MI
Strat unit: Bois Blanc formation
Submitter notes: This specimen is a hypotype. It is 2.6 cm tall.
Photo title: Brachiopod
Taxa present: Amphigenia elongata
UMMP specimen number: hypotype 23594
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Athyris sp.
Type Specimen |
Petoskey formation |
ummp invertebrate paleontology |
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Submitted on 2008-11-03 by ummp invertebrate paleontology
Location (approximate): , Emmet, MI
Strat unit: Petoskey formation
Submitter notes: These specimens are a hypotype. The larger specimen is 2.5 cm tall.
Photo title: Brachiopods
Taxa present: Athyris sp.
UMMP specimen number: hypotype 60833
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