Submitted on 2008-05-13 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This shows the thin layer on the bottom of the larger G. nodocostata, Although the previous photos identified the location of the Bivalves as Milan in Washtenaw county, this larger was found at Sylvania in Ohio. The bivalve is 2 1/4' long by 2' wide ( 5.5 X 5 cm).

Photo title: Bottom of bivalve

Taxa present: Grammysia nodocostata

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Submitted on 2008-05-16 by ummp invertebrate paleontology

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This specimen is 0.5 cm in diameter. It is a hypotype.

Photo title: Edrioasteroid

Taxa present: Agelacrinites southworthi

UMMP specimen number: hypotype 61358

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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): 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 2008-06-09 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 2008-07-19 by ummp invertebrate paleontology

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The large specimen is 4.2 cm across.

Photo title: Brachiopods

Taxa present: Protoleptostrophia perplana

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Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This image is of a large plate from the head of a Devonian Fish. The Nuchal plate was at the very back of the top of the head and the notch at the top of the photo would have been the back towards the tail area. U.S. ten cent piece for scale.

Photo title: Large, Nearly Complete, Nuchal plate from Devonian Arthrodire Fish

Taxa present: Protitanicthys rockportensis

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Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This plate shows the extensive 'armor' of these early fish

Photo title: Another Arthrodire fish plate from the Ken Dobson collection

Taxa present: Protitanichthys rockportensis

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Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: These three Paraspirifer bownockeri brachiopods show Hederella bryozoa on the bottom fossil and Cornulites worm scars, and the holes made by Clionoides, a boring sponge on the upper left example. From the Ken Dobson Collection.

Photo title: A Lovely cluster of Large Silica Brachiopods in matrix with epifauna.

Taxa present: Paraspirifer bownockeri, Hederella , Cornulites , Clionoides

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Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes:

Photo title: A different view of brachiopod plate.

Taxa present: Paraspirifer bownockeri

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Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: The muddy bottom of the Devonian seas over Michigan seemed to have few hard places for animals to attach and therefore almost any hard surface was prime real estate. This inarticulate has attached itself to the larger brachiopod for a safe place but this proved a mistake as they died togather. Some small bryozoan also have grown on both.

Photo title: A Large Brachiopod with a small inarticulate Brachiopod attached.

Taxa present: Orthospirifer cooperi, Petrocrania hamiltonae, Hederella

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Submitted on 2008-10-07 by Ken Dobson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This seems to be just a random association between this Platyceras snail and the large brachiopod, Orthospirifer. These are always suspect as the snails are noted to bore into brachiopods to eat their contents as they also did with crinoids.

Photo title: random association of snail and brachiopod

Taxa present: Orthospirifer cooperi, Platyceras bucculentum

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