Submitted on 2009-11-19 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: A very nice snail measuring 28mm tall.

Photo title: GASTROPOD

Taxa present: Orthonychia sp.

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Submitted on 2009-11-20 by Scott Vergiels

Location (approximate): Alpena, Alpena, MI

Strat unit: Norway Point formation

Submitter notes: A brachial valve view of a tiny 6mm specimen. This brachiopod is a fairly large adult for the species.

Photo title: Brachiopod

Taxa present: Sphenophragmus nanus

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Submitted on 2009-11-20 by Scott Vergiels

Location (approximate): Alpena, Alpena, MI

Strat unit: Norway Point formation

Submitter notes: A pedicle valve view of a tiny 6mm specimen. This brachiopod is a fairly large adult for the species.

Photo title: Brachiopod

Taxa present: Sphenophragmus nanus

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Submitted on 2009-11-20 by Scott Vergiels

Location (approximate): Alpena, Alpena, MI

Strat unit: Potter Farm formation

Submitter notes: A new occurance for a rare coral. It measures 62mm in diameter.

Photo title: Horn Coral

Taxa present: Naos ponderosum

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Submitted on 2009-11-20 by Scott Vergiels

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is one of two undescribed Melocrinites species from this formation. It measures 90mm long.

Photo title: Partial Crinoid Crown

Taxa present: Melocrinites sp.

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Submitted on 2009-12-02 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: The specimens are 4 cm tall.

Photo title: Trilobites

Taxa present: Basidechenella reimanni

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Submitted on 2010-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Although a rather common species from the Thunder Bay Limestone of Alpena, This blastoid has not been added to the site before. It is 5/8 inch (15.3 mm) long by 3/8 inch (8.6 mm) wide

Photo title: Heteroschisma subtruncatum from Alpena

Taxa present: Heteroschisma subtruncatum

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Submitted on 2010-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: The ambuulacral area of the previous specimen

Photo title: Second view of blastoid

Taxa present: Heteroschisma subtruncatum

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Submitted on 2010-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This coral group is about 4 inches (10 cm) long by 1 3/4 inches (4.2 cm) wide. The individual coralites are about 1/4 inch (6. mm) in diameter or about the size of an eraser of a pencil. This small grouping is on a larger plate measuring some 8 inches.

Photo title: Aulophyllum alpenensis, coral cluster

Taxa present: Aulophyllum alpenensis

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Submitted on 2010-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is a slightly close up view of the Aulophyllum sp. This specimen shows ammonites from the Squaw Bay formation on the reverse side.

Photo title: another view of corals

Taxa present: Aulophyllum alpenensis

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Submitted on 2010-11-27 by Scott Vergiels

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: An unusual specimen of a Devonian blastoid showing column and brachioles. This extremely rare crown measures 20.25mm X 8.25mm.

Photo title: BLASTOID

Taxa present: Nucleocrinus meloniformis

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Submitted on 2011-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is a large and pretty complete crown with stem in matrix. The stem is 2 3/4 inches long (7.5 cm). The whole piece is 8 1/2 inches long (21.5 cm), by 5 inches high (12.5 cm). The calyx is 4.1 cm wide and the longest arm is 3.4 cm long.

Photo title: Crown and stem of large Crinoid

Taxa present: Dolatocrinus stellifer

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Submitted on 2011-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Closer view of crinoid.

Photo title: Another view of large crinoid from Thunder Bay Limestone

Taxa present: Dolatocrinus stellifer

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Submitted on 2011-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is a closer view of the Calyx of the previous Crinoid. As stated it is about 4.1 cm wide.

Photo title: Detail of Calyx

Taxa present: Dolatocrinus stellifer

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Submitted on 2011-05-04 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Close up view of arms and pinnules of Dolatocrinus in previous views. The longest of these is 3.4 cm long.

Photo title: Last view of arms and pinnules of crinoid.

Taxa present: Dolatocrinus stellifer

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Submitted on 2011-06-09 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is a Dolatocrinus barrisi with a Platyceras conicum attached to the tegmen. As J. Koniecki pointed out earlier in this listing, the Platyceras conicum is not listed in the species of the Alpena area but it is clear the the platyceras fauna was similiar to other areas of the Michigan Basin and this is another example. The crown and Platyceras are 1.54' or 3.9 cm tall and 1.24' or 3.3 cm wide. there are two additional views.

Photo title: Unusual Snail attached to Crinoid caylx

Taxa present: Dolatocrinus barrisi, Platyceras conicum

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Submitted on 2011-06-09 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: An additional view showing snail attachment to tegmen of crinoid

Photo title: Snail on crinoid

Taxa present: Dolatocrinus barrisi, Platyceras conicum

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Submitted on 2011-06-09 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is the last view showing the attachment of the Platyceras to the crinoid. This is quite a small specimen and difficult to show all the details

Photo title: Third view of snail/Crinoid

Taxa present: Dolatocrinus barrisi, Platyceras conicum

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Submitted on 2011-06-09 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is a Dolatocrinus asterias complete crinoid with full crown, feeding arms and stem, both disarticulated and complete of about 5' or 12.5 cm in length. The entire plate is 12.5' or 18 cm tall by 5' or 12.5 cm wide. the caylx itself is only .5' or 1.5 cm wide and the crown is a total of 4.5 cm tall.

Photo title: Complete small Crinoid on plate.

Taxa present: Dolatocrinus asterias

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Submitted on 2011-06-09 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This is a close up view of the small crinoid previously. The species of Dolatocrinus asterias is quite variable in the plate structure of the calyx and this is a young example so the plates may not be typical.

Photo title: Detail of crinoid crown with feeding arms

Taxa present: Dolatocrinus asterias

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