Submitted on 2007-02-02 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes:

Photo title: Trilobites with Gastropod and Blastoid

Taxa present: Basidechenella arkonensis, Platyceras sp., Hyperoblastus sp.

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Submitted on 2007-02-03 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Coral is 9 cm wide across the top.

Photo title:

Taxa present: Favosites turbinatus

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Submitted on 2007-02-04 by Joseph Koniecki

Location (approximate): Thedford, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This pieces is over a foot across. It has been donated the UMMP and is available for research purposes. With care, the strom can be lifted off the matrix to examine the back side.

Photo title:

Taxa present: Stromatoporoid

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Submitted on 2007-02-04 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Preparation of this specimen was conducted by carefully removing pieces from the matrix and immediately gluing them back together. Once the entire specimen was removed a map was made of its original orientation. The specimen was then placed in a quaternary ammonium solution for cleaning. The solution caused the glue points to dissolve. Then the clean pieces were assembled using the map. The final orientation represents the specimen as it occurred in the matrix and not necessarily in its living position, which may or may not have been the same. The specimen is about 14 cm across at its widest point

Photo title:

Taxa present: Cladopora sp.

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Submitted on 2007-02-04 by Joseph Koniecki

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Preparation of this specimen was conducted by carefully removing pieces from the matrix and immediately gluing them back together. Once the entire specimen was removed a map was made of its original orientation. The specimen was then placed in a quaternary ammonium solution for cleaning. The solution caused the glue points to dissolve. Then the clean pieces were assembled using the map. The final orientation represents the specimen as it occurred in the matrix and not necessarily in its living position, which may or may not have been the same. The specimen is about 11 cm across at its widest point. Portions are encrusted with the bryozoan Hederalla sp.

Photo title:

Taxa present: Trachypora elegantula, Hederella sp.

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Submitted on 2007-02-14 by John Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Botryllopora is an encrusting bryozoan. It's favorite host is normally a horn coral. In this case, this large colony is attached to an unidentified matrix. The colony measures 65mm X 35mm.

Photo title: Bryozoan Colony on Matrix

Taxa present: Botryllopora socialis

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Submitted on 2007-02-14 by John Topor

Location (approximate): Thedford, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Two specimens, the larger being 27mm and the smaller one 15mm. Complete prone specimens of this trilobite are extremely rare in the formation.

Photo title: Trilobite Duo

Taxa present: Crassiproetus crassimarginatus

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Submitted on 2007-02-18 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: The preservation of blastoids in the formation is exceptional. Clusters are very rare! This group of five larger specimens is indeed a find. The blastoids range in size from 10 - 13mm in height.

Photo title: Blastoid Cluster

Taxa present: Hyperoblastus filosa

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Submitted on 2007-02-18 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Phacops iowensis southworthi eyes always contain 13 dorsoventral files and is only known from the Hungry Hollow member of the Widder formation where it is very rare. (The holotype is only a cephalon) The species of P. iowensis and E. rana co-exist in only a few Hamilton formations. This cephalon of P. iowensis southworthi is preserved a few millimeters atop a nearly complete specimen of E. rana rana. The cephalon measures 35mm wide and 23mm high. The E. Rana rana measures 35mm long

Photo title: Trilobite Association

Taxa present: Phacops (Eldredgeops?) iowensis southworthi, Eldredgeops (Phacops) rana rana

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Submitted on 2007-02-18 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: H. juvene is much smaller in size and not as common as Heliophyllum halli halli in the Hungry Hollow member. The largest of the three specimens in the photo is 40mm long and 15mm in diameter. The smallest is about 15mm long and wide.

Photo title: Horn Corals

Taxa present: Heliophyllum juvene

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Submitted on 2007-02-18 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: These tabulate corals are commonly attached to crinoid stems which probably enabled them to stay above the sea floor to improve their chances for food. These specimens are approximately 25mm in diameter.

Photo title: Tabulate Coral

Taxa present: Antholites speciosus

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Submitted on 2007-02-18 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: These somewhat common corals, like Antholites, are found attached to crinoid stems. Favorite hosts are the crinoids' Dolatocrinus and Megistocrinus. On some specimens, Cladochonus deforms the stem of it's host. It is not known how destructive this may have been, if at all, to the life of the crinoid host. The largest of the three pictured specimens is 30 X 40mm. The smallest colony is 22mm in diameter.

Photo title: Tabulate Corals

Taxa present: Cladochonus antiquus

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Submitted on 2007-03-04 by John Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This gastropod is common in the Hungry Hollow member. However, it is an exceptionally well preserved specimen. Many are found partially crushed or missing pieces of shell. They can range in size from a few millimeters up to about 35mm in diameter. This gastropod is about 31mm in diameter and 22mm high.

Photo title: Gastropod

Taxa present: Naticonema lineata

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Submitted on 2007-03-04 by John Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Platyceras conicum is uncommon in the Hungry Hollow member. Complete specimens are hard to find as the pointed end is fragile and usually found broken off. This is an average size specimen. See scale in photo for size.

Photo title: Gastropod on Matrix

Taxa present: Platyceras conicum

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Submitted on 2007-03-05 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Alveolites is common in the Hungry Hollow member. This distinct colony coral is disc-shaped. This specimen is large for the species. Generally, younger specimens will exhibit a smoother surface. This un-cleaned coral shows patches of shale on its surface. A tiny colony of Botryllopora socialis has made a home on the shale near the center of the colony. You will need to zoom in to see it. The coral measures 135mm x 115mm and is approximately 45mm thick.

Photo title: Colony Coral

Taxa present: Alveolites goldfussi, Botryllopora socialis

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Submitted on 2007-03-05 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: This horn coral from the Hungry Hollow member is not common in the formation. This specimen is a very fine example. The coral is approximately 85mm long with a cup diameter of 45mm.

Photo title: Solitary Coral

Taxa present: Bethanyphyllum robustum

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Submitted on 2007-03-05 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: The photo shows three different views of three specimens. On the left is the top view showing the tegmen, the center shows a side view of the plate ornamentation, and on the right shows the stem attachment area. Of all the crinoids that occur in the formation, your best chance is finding this Dolatocrinus sp. However, all crinoids in the Hungry Hollow member are rare. See scale in photo for size.

Photo title: Crinoid Calyxes

Taxa present: Dolatocrinus bulbaceous

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Submitted on 2007-03-05 by Mike Topor

Location (approximate): Thedford, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Heliophyllum halli comprises the bulk of the solitary coral species found in the “coral zone” of the Hungry Hollow member. They are the most common coral to be found there. These two specimens are slightly smaller than average, but show the general form well. The diameter of the specimen on the left is 39mm. The length of the coral on the right is 67mm and the width is 42mm.

Photo title:

Taxa present: Heliophyllum halli

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Submitted on 2007-03-05 by Mike Topor

Location (approximate): Arkona, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Trilobite fragments in the Hungry Hollow member are common, but complete prone specimens are very rare due to the jumbled density of corals, etc. in the “coral zone”. This trilobite’s pygidium was beginning to tuck under when burial took place. See scale in photo for size.

Photo title:

Taxa present: Eldredgeops (Phacops) rana rana

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Submitted on 2007-03-06 by Mike Topor

Location (approximate): Thedford, Lambton, ON

Strat unit: Hungry Hollow formation

Submitter notes: Views of the pedicle and brachial valves of two different specimens of the species. Rhipidomella vanuxemi is smaller than R. Penelope and not as common. The brachial valve is on the left and the pedicle valve on the right in the photo. These brachiopods are approximately 8mm thick. See scale in photo for size.

Photo title: Brachiopod

Taxa present: Rhipidomella vanuxemi

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