Ordovician Sea Plant Thingy Id (Edit: L. Carboniferous)

[Spookwoman]

1 inch long and on the other side of the rock lots of bryozoa. There seems to be small holes in it as well

[Auspex]

Brightened a bit:

[Fossildude19]

Probably another type of bryozoan, most likely.

It's beautiful, whatever it is.

Regards,

[Spookwoman]

Bryozoan I'm thinking as well looks a bit like fig 654 http://www.geology.19thcenturyscience.org/books/1896-Dana-ManGeol/htm/doc506.html

[Fossildude19]

Bryozoan I'm thinking as well looks a bit like fig 654 http://www.geology.19thcenturyscience.org/books/1896-Dana-ManGeol/htm/doc506.html

Good catch... there is a similar one here. Check page 547 for figure.

It appears that Arthroclemidae were among the earliest fenestrate bryozoans.

Regards,

Edited June 6, 2014 by Fossildude19

[painshill]

There were no plants with resemblance to that in the Ordovician - whether aquatic or terrestrial. Only primitive moss-like stuff. I would also say Bryozoan... or that you're not in Ordovician deposits.

[piranha]

Perhaps one of our UK specialists can confirm this branching bryozoan is the Carboniferous species: Ichthyorachis newenhami M‘Coy, 1844.

 

M‘Coy, F. (1844)
A synopsis of the characters of the Carboniferous limestone fossils of Ireland.
University Press, Dublin, 207 pp.
 
Wyse Jackson, P.N., McKinney, F.K., & Bancroft, A.J. (2006)
Fenestrate bryozoan genera based on species from Ireland originally described by Frederick M ‘Coy in 1844.
Palaeontology, 49(4):741-767

 

 

 

[Spookwoman]

Lower Carboniferous is right brain has taken a holiday. will hunt through some pdfs

[RyanNREMTP]

Seeing "thingy" in a title always gets my attention.

[Spookwoman]

Suffer from terrible brain fog and thingy is used a lot when describing objects. Looked at the Fenestrate bryozoan genera based on species from Ireland and it has to be Ichthyorachis newenhami Hook head is listed

Thanks for the help

If wondering about the area Its was Hook Lighthouse but the area around is interesting ref geology http://www.sepmstrata.org/page.aspx?pageid=79

Edited June 6, 2014 by Spookwoman

[TqB]

Nice specimen! - I don't think it's Ichthyorachis though which diagnostically has more than two rows of autozooecia (up to eight in the main stem and six in the lateral branches, according to the Wyse et al paper quoted by Piranha:

As yours seems to have just two rows, I'd go with a Penniretopora. (I'm by no means a bryozoan specialist but have collected a lot a lot of similar Carboniferous ones in the UK and there certainly are Penniretopora species with that overall form.)

Edited June 7, 2014 by TqB

[TqB]

Perhaps one of our UK specialists can confirm this branching bryozoan is the Carboniferous species: Ichthyorachis newenhami M‘Coy, 1844.

IMG1.jpg

M‘Coy, F. (1844)

A synopsis of the characters of the Carboniferous limestone fossils of Ireland.

University Press, Dublin, 207 pp.

Wyse Jackson, P.N., McKinney, F.K., & Bancroft, A.J. (2006)

Fenestrate bryozoan genera based on species from Ireland originally described by Frederick M ‘Coy in 1844.

Palaeontology, 49(4):741-767

I've just realised that this is the right bryozoan picture (Plate 28, no. 3 in McCoy (1844)), so good call - but the wrong name attached - it's actually the illustration for Glauconome grandis, currently renamed Penniretopora grandis (McCoy):

Ichthyorachis newenhami is Plate 29, no.8, quite similar until you look at the close-up which shows several rows of autozooecial pores:

Edited June 7, 2014 by TqB

[Spookwoman]

Thanks everyone its a new one for me just seeing the usual fan shaped bryozoa around.

[Auspex]

New for me too; thanks!