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Aquia Formation From a Box: Potomac River Paleocene


sixgill pete

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I recently received a box of micro matrix from a forum member Otodusobliquus. It was a packed full medium sized usps box about 2 1/2 gallons. After re-sifting through a 1/4 inch mesh to remove the few larger pieces and thoroughly cleaning I ended up with about a gallon and a half of searchable matrix. When searching micro matrix making sure the matrix is complete and thoroughly clean is very important; otherwise you can and probably will miss many of the smaller teeth. This particular matrix I washed 4 times before I was satisfied that it was clean enough for searching. While cleaning I used a small sifter with .75 millimeter mesh.

I have searched through about a quart of the matrix to this point and have been very satisfied with the variety, condition and the amount of finds. I thought I would share some of them with you all.

If I have any of these ID's incorrect please correct me (especially you Marco)

First a really beautiful Odontaspis winkleri:

post-4130-0-86079400-1472174392_thumb.jpg post-4130-0-06763900-1472174395_thumb.jpg post-4130-0-52824200-1472174397_thumb.jpg

A few different Triakids; if you hold the cursor over the picture my ID will appear.

post-4130-0-50818800-1472174592_thumb.jpg post-4130-0-33938900-1472174595_thumb.jpg

post-4130-0-77712500-1472174611_thumb.jpg

post-4130-0-37857700-1472174622_thumb.jpg post-4130-0-43032100-1472174624_thumb.jpg

Pachygaleus lefevri

post-4130-0-52108400-1472174772_thumb.jpg post-4130-0-90442900-1472174775_thumb.jpg

Squatina prima

post-4130-0-22164900-1472174794_thumb.jpg

Cretolamna appendiculatta

post-4130-0-68854100-1472174985_thumb.jpg post-4130-0-58677900-1472174991_thumb.jpg

Abdounia beaugei

post-4130-0-46523100-1472175043_thumb.jpg post-4130-0-89852300-1472175047_thumb.jpg

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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Isurolamna inflata

post-4130-0-31441700-1472175191_thumb.jpg post-4130-0-99020900-1472175197_thumb.jpg post-4130-0-83596500-1472175203_thumb.jpg

Galeorhinus sp.

post-4130-0-14886500-1472175238_thumb.jpg

now a tooth I am not sure of, any ideas or thoughts.

post-4130-0-89421900-1472175280_thumb.jpg post-4130-0-83695600-1472175271_thumb.jpg

Foumtizia sp.

post-4130-0-06752900-1472175274_thumb.jpg post-4130-0-83493000-1472175275_thumb.jpg

Now some fish material

these are really common, Parabula marylandica

post-4130-0-69501400-1472175383_thumb.jpg post-4130-0-73821900-1472175378_thumb.jpg

Edited by sixgill pete

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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Scomberomorus sp.

post-4130-0-69571400-1472175493_thumb.jpg

a piece of a small fish jaw,

post-4130-0-73532000-1472175515_thumb.jpg

fish spines

post-4130-0-52586200-1472175560_thumb.jpg

unknowns

post-4130-0-55427900-1472175626_thumb.jpg post-4130-0-20127900-1472175632_thumb.jpg post-4130-0-92052700-1472175637_thumb.jpg

post-4130-0-26768400-1472175644_thumb.jpg post-4130-0-81369500-1472175650_thumb.jpg post-4130-0-19143500-1472175658_thumb.jpg

Edited by sixgill pete

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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more unknowns

post-4130-0-37636000-1472175797_thumb.jpg post-4130-0-59407600-1472175803_thumb.jpg post-4130-0-92169700-1472175810_thumb.jpg

post-4130-0-37429800-1472175817_thumb.jpg

Ostracion sp.

post-4130-0-16712000-1472175860_thumb.jpg

Ray teeth; Myliobatis sp. lateral tooth. Edited per Marco's post.

post-4130-0-45085000-1472175891_thumb.jpg post-4130-0-78243900-1472175893_thumb.jpg

Rhinoptera sp.

post-4130-0-99066900-1472175958_thumb.jpg

Myliobatis sp.

post-4130-0-94404600-1472175990_thumb.jpg post-4130-0-26082600-1472175993_thumb.jpg

Hypolophodon sylvestris

post-4130-0-31101400-1472176044_thumb.jpg post-4130-0-33587600-1472176046_thumb.jpg

Edited by sixgill pete

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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an undet ray tooth

post-4130-0-37065000-1472176201_thumb.jpg post-4130-0-05010600-1472176204_thumb.jpg

I am thinking this one is Burnhamia, but not sure ....

post-4130-0-13594800-1472176240_thumb.jpg

And last but not least ( there are lots more finds from this matrix) a little gastropod. It may be a recent snail, but not sure, Anyone have any ideas?

post-4130-0-33136100-1472176334_thumb.jpg post-4130-0-24175300-1472176339_thumb.jpg post-4130-0-87358500-1472176344_thumb.jpg

I have some more pics I need to download, including some amazing looking gar scales in awesome colors. I will add them here or just maybe start a second post on this great matrix. Thanks to Seth ( Otodusobliquuus) for this fantastic stuff.

Edited by sixgill pete

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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The tiny stuff is so cool. :)

I think the snail is recent.

The human mind has the ability to believe anything is true.  -  JJ

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Don

Really nice selection of species in your post. Without sizes it is tough to id some specimens. I don't think any of the specimens in both replies are Otoliths. Below are two examples of Otoliths from the Aquia Formation.

post-2515-0-99481000-1472183376_thumb.jpgpost-2515-0-23373100-1472183378_thumb.jpg

I do not believe the one specimen is Burnhamia. It looks much more like a lateral Myliobatis tooth. Burnhamia are pretty uncommon in the Aquia.

Marco Sr.

  • I found this Informative 1

"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

image.png.9a941d70fb26446297dbc9dae7bae7ed.png image.png.41c8380882dac648c6131b5bc1377249.png

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The tiny stuff is so cool. :)

I think the snail is recent.

+1 on recent snail. It is a terrestrial snail. Something like Helicodiscus perhaps.

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now 2 teeth I am not sure of, any ideas or thoughts.

attachicon.gifShark indet.a1.jpg attachicon.gifshark indeta2.jpg

attachicon.gifshark indet1b.jpg attachicon.gifshark indet1a.jpg

Need a size on the first tooth but it could be a Hypotodus verticalis. The second tooth looks like a Foumtizia. See the picture below of a Foumtizia from the Aquia Formation.

post-2515-0-91747500-1472183951_thumb.jpg

Marco Sr.

  • I found this Informative 1

"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

image.png.9a941d70fb26446297dbc9dae7bae7ed.png image.png.41c8380882dac648c6131b5bc1377249.png

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I recently received a box of micro matrix from a forum member Otodusobliquus. It was a packed full medium sized usps box about 2 1/2 gallons. After re-sifting through a 1/4 inch mesh to remove the few larger pieces and thoroughly cleaning I ended up with about a gallon and a half of searchable matrix. When searching micro matrix making sure the matrix is complete and thoroughly clean is very important; otherwise you can and probably will miss many of the smaller teeth. This particular matrix I washed 4 times before I was satisfied that it was clean enough for searching. While cleaning I used a small sifter with .75 millimeter mesh.

I have searched through about a quart of the matrix to this point and have been very satisfied with the variety, condition and the amount of finds. I thought I would share some of them with you all.

If I have any of these ID's incorrect please correct me (especially you Marco)

First a really beautiful Odontaspis winkleri:

attachicon.gifOdontaspis winkleri1c.jpg attachicon.gifOdontaspis winkleri1b.jpg attachicon.gifOdontaspis winkleri1a.jpg

A few different Triakids; if you hold the cursor over the picture my ID will appear.

attachicon.gifTriakis sp.1b.jpg attachicon.gifTriakis sp.1a.jpg

attachicon.gifPremontreia subulidens.jpg

attachicon.gifScyliorhinus sp.1b.jpg attachicon.gifScyliorhinus sp.1a.jpg

Pachygaleus lefevri

attachicon.gifPachygaleus lefevrei2.jpg attachicon.gifPachygaleus lefevrei1.jpg

Squatina prima

attachicon.gifSquatina prima.jpg

Cretolamna appendiculatta

attachicon.gifCretalamna appendiculatta1b.jpg attachicon.gifCretalamna appendiculatta1a.jpg

Abdounia beaugei

attachicon.gifAbdounia beaugei1b.jpg attachicon.gifAbdounia beaugei1a.jpg

The Abdounia beaugei is a different species. Need size and to know if crown has striations but looks more like a Brachycarcharias lerichei .

Cretolamna appendiculatta looks like a different species. I need a size.

Triakis sp. looks more like a Premontreia subulidens.

Premontreia subulidens looks more like an Abdounia beaugei.

Marco Sr.

  • I found this Informative 1

"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

image.png.9a941d70fb26446297dbc9dae7bae7ed.png image.png.41c8380882dac648c6131b5bc1377249.png

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an undet ray tooth

attachicon.gifRay indet1A.jpg attachicon.gifRay indet1.jpg

I am thinking this one is Burnhamia, but not sure ....

attachicon.gifImage539.jpg

And last but not least ( there are lots more finds from this matrix) a little gastropod. It may be a recent snail, but not sure, Anyone have any ideas?

attachicon.gifImage553.jpg attachicon.gifImage552.jpg attachicon.gifImage551.jpg

I have some more pics I need to download, including some amazing looking gar scales in awesome colors. I will add them here or just maybe start a second post on this great matrix. Thanks to Seth ( Otodusobliquuus) for this fantastic stuff.

Undetermined ray tooth looks like a really worn lateral Myliobatis tooth.

Burnhamia again looks like a lateral Myliobatis tooth.

Snail is recent.

Marco Sr.

  • I found this Informative 1

"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

image.png.9a941d70fb26446297dbc9dae7bae7ed.png image.png.41c8380882dac648c6131b5bc1377249.png

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Hi,

I am OK with Marco and John : I don't think articles are otoliths and gastropod seems recent.

Coco

----------------------
OUTIL POUR MESURER VOS FOSSILES : ici

Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici
Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici
Mâchoires sélaciennes récentes : ici
Hétérodontiques et sélaciens : ici
Oeufs sélaciens récents : ici
Otolithes de poissons récents ! ici

Un Greg...

Badges-IPFOTH.jpg.f4a8635cda47a3cc506743a8aabce700.jpg Badges-MOTM.jpg.461001e1a9db5dc29ca1c07a041a1a86.jpg

 

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Super, a trip in a box, what a haul. The teeth are fantastic, great variety and superb specimens. Congrats

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Don

I'm really interested in seeing the gar scales. In forty years of collecting the Aquia Formation I've only found two fossil gar scales. My son Mel has also only found two fossil gar scales. Gar are currently present in pretty good numbers in the Potomac River. I just brought home a skull, upper jaw and a good number of scales from one I found on the beach. The modern scales are white to cream colored.

Marco Sr.

"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

image.png.9a941d70fb26446297dbc9dae7bae7ed.png image.png.41c8380882dac648c6131b5bc1377249.png

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That Odontaspis winkleri tooth is wicked!

It is one of the coolest teeth I have found in a long time.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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Wow that looks like a great mix!!

I might need to get my hands on some ;)

Nice finds and pictures!

Thanks for sharing.

Tony

Thanks Blake and Tony.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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WoW .. that Odontaspis is amazing. That was one wicked little bite.

Thanks Brett. It is a really cool tooth.

The tiny stuff is so cool. :)

I think the snail is recent.

Thanks John. I suspected it probably was recent. But it is pretty neat looking.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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That is so cool! I admit that I have been obsessed with the big teeth out of the Potomac but the tiny stuff is equally cool!

Rob :D

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Don

Really nice selection of species in your post. Without sizes it is tough to id some specimens. I don't think any of the specimens in both replies are Otoliths. Below are two examples of Otoliths from the Aquia Formation.

attachicon.gifFish Otolith1 4mm.jpgattachicon.gifFish Otolith2 3mm.jpg

I do not believe the one specimen is Burnhamia. It looks much more like a lateral Myliobatis tooth. Burnhamia are pretty uncommon in the Aquia.

Marco Sr.

Thanks Marco. I just realized I did not give a size on any of these. The imitation otoliths range from 6 to 9 MM. I am still working on learning to ID these Paleocene goodies. I was using your previous posts, elasmo.com and your website. So your help is much appreciated. I am relabeling the ray tooth as Myliobatis sp. lateral.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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now 2 teeth I am not sure of, any ideas or thoughts.

attachicon.gifShark indet.a1.jpg attachicon.gifshark indeta2.jpg

attachicon.gifshark indet1b.jpg attachicon.gifshark indet1a.jpg

Need a size on the first tooth but it could be a Hypotodus verticalis. The second tooth looks like a Foumtizia. See the picture below of a Foumtizia from the Aquia Formation.

attachicon.gifFoumtizia abdouni 2mm.jpg

Marco Sr.

Marco the first tooth is right at 4mm. The second tooth is rather worn but is the right size for Foumtizia. I had the bag labeled as udet. catshark. So I think I will relabel it. Thanks.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

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