Brachiopd fun and games ID help needed!

[LabRatKing]

Ok gang, been a while since I posted some fossils. I’ve been practicing my prep work and trying to get around 2500 specimens organized in my personal collection in addition to the Uni’s collection and a dozen other projects!

 

Brachiopods are a weakness when it comes to ID. These are specimens from the last 17 years, some have my old labels and such.

 

Unless Otherwise Noted all have the following location data:

Sarpy and Cass County, Nebraska, USA

Kiewitz Shale

Stoner Limestone

Stanton Formation 

 

#1 some sort of productid 

 

 

[LabRatKing]

#2

 

[LabRatKing]

#3

 

[LabRatKing]

#4 Neospirifir ?

 

[LabRatKing]

#5 Composita trilobata or subtilita?     Likely  C. subtilita

 

[LabRatKing]

#6

 

[LabRatKing]

#7

 

[LabRatKing]

#8 

Fossil Mountain/Ibex, Millard County,

Utah, USA

Unknown strata

found in mixed talus halfway up south face of exposure due north of the mountain proper

note that this one is paper thin!

 

 

[LabRatKing]

That’s enough for now, I’ll post more over the next few days. I figure you brachiopod enthusiasts well get a kick out of some of the stienkern, beekite, and conspecifics I have on the future posts!

[IsaacTheFossilMan]

6 hours ago, LabRatKing said:

#5 Composita trilobata or subtilis?

I'm 99% sure this is Composita Subtilita, not least due to its abundance in the Stanton Formation. Until someone else shows up to corroborate this, I'd mark it as C. Subtilita(?), or Composita sp.. Nice finds!

[Bob Saunders]

nice topic. from an old collection. 

[Darbi]

10 hours ago, LabRatKing said:

#8 

Fossil Mountain, Utah, USA

Unknown strata

found in mixed talus halfway up south face of exposure due north of the mountain proper

note that this one is paper thin!

 

 

 

I think it's the same species as one in my collection. Mine is paper thin too and approximately 4mm at its widest point.

 

Schizambon typicalis 

Weeks Formation 

Middle Cambrian

Millard County, Utah

Note: Fossil Mountain is in Millard County.

 

 

[LabRatKing]

1 hour ago, Darbi said:

 

I think it's the same species as one in my collection. Mine is paper thin too and approximately 4mm at its widest point.

 

Schizambon typicalis 

Weeks Formation 

Middle Cambrian

Millard County, Utah

Note: Fossil Mountain is in Millard County.

 

 

Excellent! Thanks for the confirmation. I had my suspicions, but was not sure at all.

Edited location data as it was late and I was a bit sleepy.

[LabRatKing]

9 hours ago, IsaacTheFossilMan said:

I'm 99% sure this is Composita Subtilita, not least due to its abundance in the Stanton Formation. Until someone else shows up to corroborate this, I'd mark it as C. Subtilita(?), or Composita sp.. Nice finds!

I too was fairly certain of subtilita, however those guides from Uni Neb Lincoln for the sites have some ambiguity with another formation in the area (Hughes Creek Member, Foraker Formation).

I wonder if they had some cross-labeled stuff as I have found numerous specimens of multiple species in the Kiewitz sites that they list from the Hughes Creek sites, the latter of which are no longer publicly accessible, hence why I haven't hunted them..

[IsaacTheFossilMan]

Just now, LabRatKing said:

I too was fairly certain of subtilita, however those guides from Uni Neb Lincoln for the sites have some ambiguity with another formation in the area (Hughes Creek Member, Foraker Formation).

I wonder if they had some cross-labeled stuff as I have found numerous specimens of multiple species in the Kiewitz sites that they list from the Hughes Creek sites, the latter of which are no longer publicly accessible, hence why I haven't hunted them..

Interesting. If your guides to the formations say otherwise, follow them, I am not too familiar with your strata; I just knew that they had been found around there.

[LabRatKing]

1 minute ago, IsaacTheFossilMan said:

Interesting. If your guides to the formations say otherwise, follow them, I am not too familiar with your strata; I just knew that they had been found around there.

The guides are sketchy at best. You can check them out here:

Hughes Creek Fossils

Kiewitz Fossils

[IsaacTheFossilMan]

Just now, LabRatKing said:

The guides are sketchy at best. You can check them out here:

Hughes Creek Fossils

Kiewitz Fossils

Will do, I shall read them this evening! Remind me again, sorry, which one do yours hail from?

[LabRatKing]

48 minutes ago, IsaacTheFossilMan said:

Will do, I shall read them this evening! Remind me again, sorry, which one do yours hail from?

These are from the Kiewitz. I'm adding a few more to the thread shortly.

[IsaacTheFossilMan]

1 minute ago, LabRatKing said:

These are from the Kiewitz. I'm adding a few more to the thread shortly.

Okay, thank you. Looking forward to it, will be reading the printed articles in about an hour.

[LabRatKing]

#9 more Composita...with some amazing Beekite

 

also some that make me wonder about subtilata vs trilobata

 

 

 

[LabRatKing]

#10

and some smaller unknowns 

 

[LabRatKing]

#11

complete mysteries 

 

[LabRatKing]

#12 Hustedia mormoni 

which shouldn’t be at the Kiewitz site as best I can tell

also my favorite brachiopod I have found anywhere 

 

[LabRatKing]

#13

another mystery, and a large one at that!

I suspect this one might have been from one of the many gravel haulers that frequents past this road cut site or even in the sand used in winter around here or post flooding backfill added after the historic flooding a while back found as you see it

 

[Thomas.Dodson]

I remember referring to those UNL guides because they cover very similar stratigraphic equivalents to some Illinois places I was collecting.

 

#1 I really want to say Juresania nebrascensis.

 

#2 Maybe Antiquatonia portlockianus?

 

#3 and #4: Hopefully those UNL guides are right in which Neospirifer species are present because they're a pain when there's multiple species present... They do look like triplicatus (to me).

 

#7 Some Neochonetes.

 

#11 look like Derbyia crassa.

 

#12 sure looks like Hustedia. They're known from age equivalent strata even if not from the Kiewitz.

 

It was my understanding that Composita gradates from trilobata to subtilitia and by the age of the Kiewitz is probably subtiltia.

 

@Tidgy's Dad Care to weigh in on these?