Currently showing records 1 - 20 of 125 total

More Info Image Taxa Strat Unit Contributor
Megistocrinus rugosus Four Mile Dam formation David Thompson

Submitted on 2007-03-09 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This example of Megistocrinus rugosus crinoid caylx shows how at times mineral replacement can be of a rich red Calcite, making a nice fossil more attractive. This was collected at a bioherm or fossil 'reef' in a quarry. This shows the stem base, the upper tegman is complete also.

Photo title: A 'carnelian' crinoid from Alpena

Taxa present: Megistocrinus rugosus

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Megistocrinus rugosus Four Mile Dam formation David Thompson

Submitted on 2007-03-09 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: This shows the tegmen of the previous Megistocrinus rugosus with the red replacement. Traces of red are found in fossils near the bioherms but rarely a complete calyx with this much. U.S. Ten Cent piece for scale

Photo title: The tegmen of 'red' crinoid

Taxa present: Megistocrinus rugosus

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Eutaxocrinus sp. Four Mile Dam formation Stan Hyne

Submitted on 2007-11-03 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: Undescribed crinoid from the Dock Street Clay prepared by Scott Vergiels

Photo title: RARE CRINOID CROWN

Taxa present: Eutaxocrinus sp.

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Undescribed sp. Alpena formation Scott Vergiels

Submitted on 2007-11-04 by Scott Vergiels

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This is one of a handful of Devonian Cyclocystoids from North America and likely the only one from the basin.

Photo title: ? Rarest Michigan Basin Echinoderm

Taxa present: Undescribed sp.

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Euryocrinus barrisi Four Mile Dam formation ummp invertebrate paleontology

Submitted on 2008-02-22 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: Specimen is listed as being from the Dock Street Clay. Crown is 4 cm top to bottom.

Photo title: Crinoid crown

Taxa present: Euryocrinus barrisi

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Favosites clausus Four Mile Dam formation ummp invertebrate paleontology

Submitted on 2008-02-23 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Four Mile Dam formation

Submitter notes: Specimen is about 10 cm across.

Photo title: Coral

Taxa present: Favosites clausus

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Basidechenella witherspooni
Type Specimen
Alpena formation ummp invertebrate paleontology

Submitted on 2008-03-01 by ummp invertebrate paleontology

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This specimen is the holotype for the species. It is 3 cm across

Photo title: Trilobite

Taxa present: Basidechenella witherspooni

UMMP specimen number: holotype 56620

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Stummiana arkonensis Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A very rare little trilobite from the Dock Street Clay member. It measures 20mm long x 12mm wide.

Photo title: Trilobite

Taxa present: Stummiana arkonensis

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Neometacanthus callites Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A very unusual trilobite. This specimen measures 37mm long x 21mm wide.

Photo title: Trilobite

Taxa present: Neometacanthus callites

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Agelacrinites sp. Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This rare fixed starfish from the Dock Street Clay member measures 27mm in diameter. The slab is 62mm square.

Photo title: Edrioasteroid

Taxa present: Agelacrinites sp.

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Pithocrinus cooperi Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This inflated crown measures 95mm long x 94mm wide. The calyx is slightly crushed.

Photo title: Crinoid Crown

Taxa present: Pithocrinus cooperi

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Pithocrinus cooperi Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A fine example of a complete crown with 165mm of stem. The crown measures 25mm x 28mm.

Photo title: Crinoid Crown

Taxa present: Pithocrinus cooperi

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Pithocrinus cooperi, Platyceras rarispinum, Favosites sp. Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: The gastropod sits atop the crinoid calyx near a Favosites coral. The entire specimen measures 83mm x 62mm.

Photo title: Crinoid Calyx with Spined Gastropod

Taxa present: Pithocrinus cooperi, Platyceras rarispinum, Favosites sp.

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Aorocrinus sp. Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This little crown measures 42mm high x 40mm wide.

Photo title: Crinoid Crown

Taxa present: Aorocrinus sp.

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Halysiocrinus barrisi Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: An unusual flexible crinoid from the Dock Street Clay member. It measures 50mm high x 31mm wide and rests on a slab 69mm x 61mm. Formerly known as Cunctocrinus.

Photo title: Crinoid Crown

Taxa present: Halysiocrinus barrisi

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Decadocrinus sp. Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This crown measures 38mm high with about 30mm of stem. The slab is 52mm x 46mm.

Photo title: Crinoid Crown

Taxa present: Decadocrinus sp.

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Cadiscocrinus sp., Euryocrinus sp. Alpena formation Pat Rutkowski

Submitted on 2008-03-12 by Pat Rutkowski

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A beautiful slab with two different crinoid genera and an unidentified coral. The slab measures 115mm x 117mm.

Photo title: Crinoid Crowns

Taxa present: Cadiscocrinus sp., Euryocrinus sp.

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Megistocrinus sp. Alpena formation Stan Hyne

Submitted on 2008-03-13 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A tegmen(top)view of the calyx which measures 36mm in diameter and 33mm high.

Photo title: Crinoid Calyx

Taxa present: Megistocrinus sp.

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Megistocrinus sp. Alpena formation Stan Hyne

Submitted on 2008-03-13 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A bottom view of the calyx which measures 36mm in diameter and 33mm high.

Photo title: Crinoid Calyx

Taxa present: Megistocrinus sp.

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Megistocrinus sp. Alpena formation Stan Hyne

Submitted on 2008-03-13 by Stan Hyne

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: A side view of the calyx which measures 36mm in diameter and 33mm high.

Photo title: Crinoid Calyx

Taxa present: Megistocrinus sp.

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