Tentaculites from New York's Manlius Formation

[Jeffrey P]

Monday I was in Schoharie County up on the Helderberg Plateau southwest of Albany, NY. In a roadside exposure of the Manlius Formation I picked up several pieces of rock with numerous Tentaculites specimens. There were also small brachiopods and ostracods. The Manlius Formation either represents the bottom of the Helderberg Group- the lowest of the Lower Devonian or the highest formation in the Silurian in New York.  Tentaculites were originally thought to be related to mollusks or worms, but now are considered more closely related to brachiopods and bryozoans. 

[doushantuo]

posting this once more

Good plate Jeff.Any indications of current orientation of the shells?

[doushantuo]

from Sauerland(1983):

[Kane]

Tentaculites remain as a kind of conundrum. Neat pieces, Jeffrey! I only know my Devonian tentacritters so all I can provide is my applause.  

[doushantuo]

Gessa(1998),decided to post this because the early ontogeny of Nowakia is nicely shown

[Shamalama]

@Jeffrey P, Nice finds from the Keyser... er... Manlius formation. I sure do love a plate full of Tentaculids.

 

@doushantuo, Thanks for the info. I do not think I have ever seen a rounded tip on any Tentaculite that I have found but now I will have to examine some under the 'scope.

[Fossildude19]

Great plates, Jeff!

Congratulations. 

Tentaculites are quite cool, in my opinion. 

Regards,

[Ludwigia]

Nice plates, Jeff!

[Arizona Chris]

REAL tentaculites - totally killer find.  And a whole slab of them?  Very impressive.

[Pagurus]

That's a real fine mess of tentaculites you found there, Jeff. Nice.

[doushantuo]

BTW,just curious:no specimen with an operculum?

 

BTW:both Blind and Lardeux found evidence for a sipho-like structure in internal moulds:

[GordonC]

Thanks , Jeff, very informative post and follow through.

the Manlius was deposited in a lagoon environment at and slightly below and above mean sea level.

Leo Laporte authored definitive papers on the subject. http://paleo.cortland.edu/class/strat/files/Laporte_1967.pdf

Gordon

[Jeffrey P]

On ‎11‎/‎16‎/‎2017 at 12:02 AM, doushantuo said:

from Sauerland(1983):

Thanks for all of the useful information about Tentaculites.

On ‎11‎/‎16‎/‎2017 at 12:02 AM, Kane said:

Tentaculites remain as a kind of conundrum. Neat pieces, Jeffrey! I only know my Devonian tentacritters so all I can provide is my applause.  

Thanks for the support Kane. 

On ‎11‎/‎16‎/‎2017 at 7:17 AM, Shamalama said:

@Jeffrey P, Nice finds from the Keyser... er... Manlius formation. I sure do love a plate full of Tentaculids.

 

@doushantuo, Thanks for the info. I do not think I have ever seen a rounded tip on any Tentaculite that I have found but now I will have to examine some under the 'scope.

Thanks Dave. I'm glad you appreciate Tentaculid plates. 

[Jeffrey P]

On ‎11‎/‎16‎/‎2017 at 3:27 PM, Fossildude19 said:

Great plates, Jeff!

Congratulations. 

Tentaculites are quite cool, in my opinion. 

Regards,

Thanks Tim. I'm glad we agree on Tentaculites essential coolness. 

On ‎11‎/‎16‎/‎2017 at 6:21 PM, Ludwigia said:

Nice plates, Jeff!

Thanks Roger. 

On ‎11‎/‎16‎/‎2017 at 6:49 PM, Arizona Chris said:

REAL tentaculites - totally killer find.  And a whole slab of them?  Very impressive.

Thanks Arizona Chris. The small site I visited had quite a few lying about. 

On ‎11‎/‎16‎/‎2017 at 9:28 PM, Pagurus said:

That's a real fine mess of tentaculites you found there, Jeff. Nice.

Thanks Mike. 

[Jeffrey P]

On ‎11‎/‎18‎/‎2017 at 10:30 AM, GordonC said:

Thanks , Jeff, very informative post and follow through.

the Manlius was deposited in a lagoon environment at and slightly below and above mean sea level.

Leo Laporte authored definitive papers on the subject. http://paleo.cortland.edu/class/strat/files/Laporte_1967.pdf

Gordon

Thanks Gordon for the Manlius Formation info. Very much appreciated.