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JimB88

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After puzzling over this for a while, thinking it was a weird cephalopod or a giant gastropod, I believe it is a reticulated sponge. Specifically, Dictyospongia Hall and Clarke, 1898 (Ectenodictya implexa, Hall, 1882). What do you think? Thanks.

Tom

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AVOCATIONAL PALEONTOLOGIST

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"THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS"

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After puzzling over this for a while, thinking it was a weird cephalopod or a giant gastropod, I believe it is a reticulated sponge. Specifically, Dictyospongia Hall and Clarke, 1898 (Ectenodictya implexa, Hall, 1882). What do you think? Thanks.

Tom

I forgot to take a picture laterally. The specimen is slightly curved. It was taken from the Mahantango Formation of Pennsylvania and is Mid-Devonian in age.

AVOCATIONAL PALEONTOLOGIST

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"THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS"

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I forgot to take a picture laterally. The specimen is slightly curved. It was taken from the Mahantango Formation of Pennsylvania and is Mid-Devonian in age.

I found some lateral photos.

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  • I found this Informative 1

AVOCATIONAL PALEONTOLOGIST

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CURMUDGEON

"THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS"

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Interesting specimen! I can't confirm your genus/sp. ID but it does have that characteristic hexactinellid network pattern.. let's see what others say...

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Dictyospongia is a good call and most likely the correct one. I have several specimens in my collection and it matches well.

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Dictyospongia is a good call and most likely the correct one. I have several specimens in my collection and it matches well.

Thanks Doc. Could you post some pictures of your specimens?

AVOCATIONAL PALEONTOLOGIST

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"THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS"

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The Dictyospongia sp. is packed away at the moment but here is another interesting specimen from the same area called Uphantia sp.
post-5678-0-21364500-1371296884_thumb.jpg


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And one more sponge from my collection. This one is Leiostracosia angustata from the Misburg quarries in Germany.

Sponges are all I collect and have well over 1000 specimens from around the world. I'm in the middle of a full inventory and re-examination so much is packed away as I work on one box at a time. Right now I am on the tail end of the sponges from the clays and sands of the Touraine, Paris Basin, France.

post-5678-0-65905700-1371298579_thumb.jpg

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I found an image file of one of my specimens of Dictyospongia sp. for you to compare.

This specimen looks just like the one's shown in the Hall book. Thanks for the help.

By the way.....this was my first sponge.

Tom

AVOCATIONAL PALEONTOLOGIST

STROKE SURVIVOR

CANCER SURVIVOR

CURMUDGEON

"THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS"

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Nice find for a first sponge! Typically a specimen like yours would retail for $75 to $125 if you even care. Keep looking, especially after any recent rains.

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Thanks Doc. I don't sell my fossils but I am grateful to know the value. I'm feeling like I should have looked harder for the rest of it. The formation I found it in is VERY fossilferous......you can't spit without hitting a trilobite, gastropod, cephalopod, bryozoan, or coral.

AVOCATIONAL PALEONTOLOGIST

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CURMUDGEON

"THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS"

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You've got it.

AVOCATIONAL PALEONTOLOGIST

STROKE SURVIVOR

CANCER SURVIVOR

CURMUDGEON

"THERE IS A VERY FINE LINE BETWEEN AVOCATIONAL PALEONTOLOGY AND MENTAL ILLNESS"

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  • 3 months later...

Here are some sponges I've collected out of the Maquoketa Formation over the years.

Brachiospongia sp.

Maquoketa Formation, Elgin member

Upper Ordovician

Southeast Minnesota

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Hindia sphaeroidalis

Maquoketa Formation, Elgin member

Upper Ordovician

Southeast Minnesota

post-3840-0-14275000-1381496765_thumb.jpg post-3840-0-04145600-1381496767_thumb.jpg

Aulocopella sp. (I think)

Maquoketa Formation, Elgin member

Upper Ordovician

Southeast Minnesota

post-3840-0-93969600-1381496783_thumb.jpg

Phialaspongia fossa

Maquoketa Formation, Elgin member

Upper Ordovician

Northeast Iowa

post-3840-0-02903400-1381496772_thumb.jpg

Not Sure

Maquoketa Formation, Elgin member

Upper Ordovician

Northeast Iowa

post-3840-0-94545200-1381496780_thumb.jpg

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Here are some sponges I've collected out of the Maquoketa Formation over the years.

Brachiospongia sp.

Maquoketa Formation, Elgin member

Upper Ordovician

Southeast Minnesota

attachicon.gif4-14--Brachiospongia sp.JPG

Hindia sphaeroidalis

Maquoketa Formation, Elgin member

Upper Ordovician

Southeast Minnesota

attachicon.gifHindia sphaeroidalis 1.JPG attachicon.gifHindia sphaeroidalis.jpg

Aulocopella sp. (I think)

Maquoketa Formation, Elgin member

Upper Ordovician

Southeast Minnesota

attachicon.gifUnknown Sponge.jpg

Phialaspongia fossa

Maquoketa Formation, Elgin member

Upper Ordovician

Northeast Iowa

attachicon.gifPhialaspongia fossa.jpg

Not Sure

Maquoketa Formation, Elgin member

Upper Ordovician

Northeast Iowa

attachicon.gifpost-3840-0-68184200-1381270487.jpg

Brachiospongia sp. - excellent quality!!!

Hindia sphaeroidalis - very nice! You should try to prep it out :)

Phialaspongia fossa - try to prep it out :)

Aulocopella sp. - nice, but is not complete....I wish you will find one day complete specimen :)

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  • 5 weeks later...

Hi!

Here is a nice middle-devonian sponge from the Eifel.

Its size is about 40mm, found in the Ahbach-Formation, Givetian.

Nils

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Hi Evgeny!

The easiest way to prepare those sponges is by using a micro sandstreaming tool. Isolated sponges can easily be cleaned with an tenside called "Rewoquad".

This tenside is almoust the best solution for cleaning fossils out of clay-rich sediments.

Here is another sponge from the Ahbach-Formation, Givetian.

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Those ones are very rare. Unfortunately the sponges are poorly preserved, so it is still impossible to make a determination. Size of specimen is about 10mm.

Greets,

Nils

Edited by nils
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This sponge was found years ago in the Pennsylvanian sediments of Texas. I gave it to my ex wife to use it as a loofah, but things didn't turn out so well...

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Grüße,

Daniel A. Wöhr aus Südtexas

"To the motivated go the spoils."

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Very nice! I have several of those from the Bridgeport Pioneer Quarry. I took one and had it cut sagittally and coronally. It has an exhalant system like Jeriopsis or Jerica. I would like to collect a few more next time I come up that way. There is a deposit on the lake that is exposed at low water levels but I don't know what the level is right now.

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You know you craft and QUARRY quite well, DocPaleo.

Grüße,

Daniel A. Wöhr aus Südtexas

"To the motivated go the spoils."

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Hehehehe!

This is my area of interest! I have near a thousand specimens from all over the world and always looking for more to add to my collection. I also have a remarkable collection of exetent porifera. Dr. Rigby and Bob Cooper both got me started in this area almost twenty years a go.

Post some more pictures of what you got folks!

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