Submitted on 2012-11-28 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: This specimen is 3 cm tall.

Photo title: Crinoid calyx with tegmen

Taxa present: Arthroacantha carpenteri

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Submitted on 2012-11-28 by Joseph Koniecki

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This specimen is 3.3 cm tall.

Photo title: Blastoid

Taxa present: Placoblastus obovatus

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Submitted on 2012-12-02 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Arkona formation

Submitter notes: I found this specimen a couple years back in the Arkona Formation. I have not been able to ID it. It is quite large for a pelecypod from the Arkona. This specimen is 7 cm across. Most Arkona formation pelecypods are a cm or less. Any help in ID'ing this specimen would be appreciated.

Photo title: Pelecypod

Taxa present: Undetermined

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Submitted on 2013-01-17 by ummp invertebrate paleontology

Location (approximate): Thedford, Lambton, ON

Strat unit: Widder formation

Submitter notes: The specimen is 2 cm tall.

Photo title: Brachiopod

Taxa present: Eunella harmonica

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Submitted on 2013-01-19 by ummp invertebrate paleontology

Location (approximate): Petoskey, Emmet, MI

Strat unit: Petoskey formation

Submitter notes: This specimen is labeled as Gypidula but it probably is Siberella. Gypidula is probably an old name. The specimen is 2.4 cm across

Photo title: Brachiopod

Taxa present: Gypidula petoskeyensis

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Submitted on 2013-01-19 by ummp invertebrate paleontology

Location (approximate): Petoskey, Emmet, MI

Strat unit: Petoskey formation

Submitter notes: This specimen is labeled as Gypidula but it probably is Siberella. Gypidula is probably an old name. The specimen is 2.4 cm across.

Photo title: Brachiopod

Taxa present: Gypidula petoskeyensis

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Submitted on 2013-01-20 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This crinoid was collected in May, 1963 but not prepared or cleaned until now. This is a interesting Arthroacantha carpenteri from unit 13 of the Silica formation in Sylvania, OH. It was collected by Tom Witherspoon, Sr. and shows the lovely 'Sunflower' pattern of the crinoid crown with the arms displayed. In this case, some creature has disrupted or eaten the arm bases at the top of the specimen and the remaining arms are at a lower level then the calyx. The entire plate is 22 cm by 13 cm (8 1/2' by 5 1/4'), the stem is 8 cm or 3 1/4' long, Maximum arm spread is 15 cm or 6' wide.

Photo title: Crinoid plate

Taxa present: Arthroacantha carpenteri

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Submitted on 2013-01-20 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This is a slightly larger view of the previous crinoid to encompass more of the total plate.

Photo title: Crinoid plate #2

Taxa present: Arthroacantha carpenteri

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Submitted on 2013-01-20 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is a very large example of the caylx of a Megistocrinus multidecoratus from the Thunder Bay Limestone of Partridge point in Alpena. It weighs 7 ounces and is nearly 2 inches high by 3 inches wide, a monster from this location

Photo title: Large Crinoid Caylx

Taxa present: Megistocrinus multidecoratus

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Submitted on 2013-01-20 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Bell formation

Submitter notes: These three crinoid caylxes were found in year 2012 and all were found within a 2 foot space of ground. One can go years not seeing these then a special find of all three at once! These Gennaeocrinus variables are all complete, the smallest on the left is .3' or .77 cm, the largest in the middle is .4' or 1.1 cm tall by .4 or 1.0 cm wide. These were all in pristine condition and required no cleaning.

Photo title: Three tiny crinoid calyxes

Taxa present: Gennaeocrinus variabilis

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Submitted on 2013-01-20 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This nearly complete crinoid is disarticulated in parts of the lower stem and the arms have been scraped it appears. Some of the column may still be hidden under the Bryozoan fronds that make up much of the limestone of the matrix which is 7' by 5 1/4' or 18 cm by 13.5 cm. The crown itself is 1 1/2' or 3 cm high and the arms range from 1/2' or 1.2 cm to 1' or 2.5 cm wide.

Photo title: Another almost complete crinoid on matrix

Taxa present: Aorocrinus cassedayi

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Submitted on 2013-01-20 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes:

Photo title: Same crinoid but in black and white to show crown detail

Taxa present: Aorocrinus cassedayi

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Submitted on 2013-01-23 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Genshaw formation

Submitter notes: This specimen is labeled as Gypidula but it probably is Siberella. Gypidula is probably an old name. The specimen is 3 cm across.

Photo title: Brachiopod

Taxa present: Gypidula romingeri

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Submitted on 2013-01-23 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This specimen is 2.7 cm across.

Photo title: Brachiopod

Taxa present: Fimbrispirifer venustus

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Submitted on 2013-01-24 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: The specimen is 1.2 cm across.

Photo title: Bachiopod

Taxa present: Elytha fimbriata

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Submitted on 2013-01-24 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: The lower most specimen is 1.2 cm across. It is the same specimen as pictured in the single specimen entry.

Photo title: Brachiopods

Taxa present: Elytha fimbriata

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Submitted on 2013-01-24 by ummp invertebrate paleontology

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: This specimen is 2.1 cm across

Photo title: Brachiopod

Taxa present: Elytha fimbriata

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Submitted on 2013-01-24 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This specimen is 1.2 cm across.

Photo title: Bachiopod

Taxa present: Elytha fimbriata

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Submitted on 2013-01-24 by ummp invertebrate paleontology

Location (approximate): Thedford, Lambton, ON

Strat unit: Widder formation

Submitter notes: This specimen is 2 cm across.

Photo title: Bachiopod

Taxa present: Elytha fimbriata

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Submitted on 2013-01-24 by ummp invertebrate paleontology

Location (approximate): Ann Arbor, Washtenaw, MI

Strat unit: Traverse formation

Submitter notes: This specimen is 4 cm across including the matrix. It was found in glacial drift. It is labeled as Onondaga Limestone, however that name does not appear as a choice for the Michigan Basin.

Photo title: Bachiopod

Taxa present: Elytha sp.

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