Submitted on 2008-05-17 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: View #1. This rostroconch is a paratype and is 2.5 cm across.

Photo title: Rostroconch -View #1

Taxa present: Conocardium pseudobellum

UMMP specimen number: paratype 47286

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Submitted on 2008-05-17 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This is view #2. See view #1 for additional information.

Photo title: Rostroconch - View #2

Taxa present: Conocardium pseudobellum

UMMP specimen number: paratype 47286

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Submitted on 2008-05-17 by ummp invertebrate paleontology

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is a paratype. The crinoid on the left is 3.5 cm.

Photo title: Crinoids

Taxa present: Logocrinus brandoni

UMMP specimen number: paratype 57885

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Submitted on 2008-05-27 by ummp invertebrate paleontology

Location (approximate): , Presque Isle, MI

Strat unit: Genshaw formation

Submitter notes: This specimen is 4.5 cm. It is a hypotype.

Photo title: Crinoid holdfast

Taxa present: Ancyrocrinus bulbosus

UMMP specimen number: hypotype 57721

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Submitted on 2008-05-27 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This specimen is 3 cm. It is hypotype.

Photo title: Crinoid holdfast

Taxa present: Ancyrocrinus bulbosus

UMMP specimen number: hypotype 57702

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Submitted on 2008-05-27 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This specimen is a rare find that has the entire crinoid (crown, stem and holdfast). The specimen is 6 cm. It is a hypotype.

Photo title: Crinoid

Taxa present: Ancyrocrinus bulbosus

UMMP specimen number: hypotype 23867

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Submitted on 2008-05-27 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This specimen is 3 cm. It is a hypotype.

Photo title: Crinoid holdfast

Taxa present: Ancyrocrinus bulbosus

UMMP specimen number: hypotype 57706

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Submitted on 2008-05-27 by ummp invertebrate paleontology

Location (approximate): Thedford, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This specimen is 3 cm. It is a hypotype.

Photo title: Crinoid holdfast

Taxa present: Ancyrocrinus bulbosus

UMMP specimen number: hypotype 57641a

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Submitted on 2008-05-27 by ummp invertebrate paleontology

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is the holotype for the species. It is 3.2 cm tall.

Photo title: Crinoid crown

Taxa present: Corocrinus nodosus

UMMP specimen number: holotype 27684

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Submitted on 2008-05-27 by ummp invertebrate paleontology

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is a hypotype. It is 4 cm across.

Photo title: Crinoid crown

Taxa present: Decadocrinus hughwingi

UMMP specimen number: hypotype 57886

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Submitted on 2008-06-06 by Joseph Koniecki

Location (approximate): Paulding, Paulding, OH

Strat unit: Silica formation

Submitter notes: A very nice brachiopod with two inarticulate brachiopods and coral attached to the main brachiopod. The specimen is 5 cm across

Photo title: Brachiopod with epifauna

Taxa present: Megastrophia concava, Petrocrania hamiltoniae, Aulopora microbuccinata

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Submitted on 2008-06-06 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: George McIntosh has identified this crinoid as probably Nassoviocrinus. He stated that if the identification holds up upon closer examination, that it would be the first report of a Nassviocrinus from the Alpena area. The crinoid crown is 2.5 cm tall.

Photo title: Crinoid

Taxa present: Nassoviocrinus sp., Corocrinus sp.

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Submitted on 2008-06-09 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: There are four species of these large 'shrimp-like' animals in the Silica formation. This is an unusual picture as it shows this species from the top with both lateral plates, the axial ridge and prora with the rostrum broken off. This type of preservation is rare, normally only one of the lateral plates shows with the animal on its side. These show incredible iridescent colors when wet and just exposed but turn dull when dry.

Photo title: Phyllocarid Rhinocaris

Taxa present: Rhinocaris ehlersi

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Submitted on 2008-06-09 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This shows full plate with US 25 cent piece for scale, The Phyllocarid is 6.5 cm long by 2.8 cm wide

Photo title: Full view of plate with Phyllocarid, Rhinocaris.

Taxa present: Rhinocaris ehlersi

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Submitted on 2008-06-09 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This is the second of the four species of Phyllocarid from the Silica. Unlike the previous photos, this species has clear patterns of lines in its lateral plates and tail pieces or somites. Also this shows one of the paired gastric teeth or mandibles used by Phyllocarids to eat their prey as shrimp and lobsters do today.

Photo title: Phyllocarid Herbertocaris with gastric 'teeth'

Taxa present: Herbertocaris wideneri

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Submitted on 2008-06-09 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This is a closeup of the previous photo showing the mandible in greater detail.

Photo title: Detail of Mandible

Taxa present: Herbertocaris wideneri

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Submitted on 2008-06-09 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This detail shows the texture and striations in the shell material of one of the somites or tail sections of the animal.

Photo title: Detail of 'shell' of Phyllocarid somite or tail.

Taxa present: Herbertocaris wideneri

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Submitted on 2008-06-09 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This believed to be the lateral plate of the third species of Phyllocarid from the Silica and shows a bit of the lateral ridge that is not present in other species of Phyllocarid from this formation. Due to the fragmented nature of the specimen however, this could also be part of one of the other species found in the Silica.

Photo title: Third species of Phyllocarid from Silica Formation

Taxa present: Dithyrocaris neptuni

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Submitted on 2008-07-17 by ummp invertebrate paleontology

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: I found this while looking for specimens to include in this database and was just facinated with the specimen. It is the internal structure of Paraspirifer brachiopod. The specimen is 4 cm across.

Photo title: Brachiopod internal structure

Taxa present: Paraspirifer bownockeri

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Submitted on 2008-07-17 by ummp invertebrate paleontology

Location (approximate): Rogers City, Presque Isle, MI

Strat unit: Dundee formation

Submitter notes: From the Calcite Quarry.

Photo title: Pelecypods

Taxa present: Paracyclas proavia

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