Submitted on 2008-05-12 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: The top view of same specimen.

Photo title: Callipleura nobilis, Brachiopod

Taxa present: Callipleura nobilis

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Submitted on 2008-05-12 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This is another example of this lovely brachiopod from the Hungry hollow formation in Ontario, Canada. This is a nice large example at 1 1/4' (3. cm)

Photo title: Callipleura nobilis, Brachiopod

Taxa present: Callipleura nobilis,

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Submitted on 2008-05-12 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This brachiopod, Strophodonta demissa, has an inarticulate brachiopod, Petrocrania hamiltoniae, on it and on that inarticulate there is the tabulate coral, Aulopora microbuccinata., but not on the big brachiopod (?). In addition there are two Bryozoans on the brachiopods; Atactotoechus cf. typicus (a trepostome bryozoan) covers the side opposite the Inarticulate and Hederella filiformis (cyclostome bryozoan) on the base. Also Hederella concinnoides on the reverse and also on the inarticulate.

Photo title: A Brachiopod, Strophodonta demissa, with lots of epifauna!

Taxa present: Strophodonta demissa, Petrocrania hamiltoniae, Aulopora microbuccinata, Atactotoechus typicus, Hederella filiformis, Hederella concinnoides

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Submitted on 2008-05-12 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes:

Photo title: Another view of same Brachiopod with epifauna

Taxa present: Strophodonta demissa

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Submitted on 2008-05-12 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This view shows the Bryozoans, Atactotoechus cf. typicus and the Hederella filiformis (cyclostome bryozoan)

Photo title: Third view of brachiopod

Taxa present: Atactotoechus typicus, Strophodonta demissa, Hederella filiformis

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Submitted on 2008-05-13 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: Another view of the bottom of the G. sylvaniensis and the larger nodocostata,

Photo title: Silica Bivalves

Taxa present: Grammysia nodocostata, Grammysia sylvaniensis

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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 2008-05-13 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: This example of Platyceras rarispinum from the Widder beds at Arkona, Ontario was the first gastropod that I found ever. It is also a nice example of the species.The snail is 1 3/4'(3.5 cm) high and wide.

Photo title: Gastropod from Arkona, Ontario

Taxa present: Platyceras rarispinum

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Submitted on 2008-05-13 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: Opposite view of Platyceras

Photo title: Gastropod from Arkona, Ontario

Taxa present: Platyceras rarispinum

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Submitted on 2008-05-13 by David Thompson

Location (approximate): Arkona, Lambton, ON

Strat unit: Widder formation

Submitter notes: This shows the compressed body of the snail.

Photo title: Gastropod from Arkona, Ontario, third view

Taxa present: Platyceras rarispinum

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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 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This crinoid with crown and stem was preserved at the bottom of a channel and was covered by Bryozoa. This was revealed after the fronds of bryozoans were removed.

Photo title: Crinoid with stem and arms

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes:

Photo title: A more detailed view

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This shows the curved nature of the matrix in which the crinoid was washed(?) and covered with additional matrix to preserve all.

Photo title: Third view showing the 'pipe' in which the crinoid was preserved.

Taxa present: Botryocrinus thomasi

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Submitted on 2008-11-23 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: These were from bioherm areas of the Alpena Limestone

Photo title: Series of crinoid calyxes graded in size, tegmen view

Taxa present: Dolatocrinus asterias

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