Search the Community
Showing results for tags 'strophomena'.
Found 11 results
-
A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
- 723 replies
-
- 2
-
-
- amplexopora
- amplexopora septosa
- (and 75 more)
-
I collected this Strophomena planumbona brachiopod recently in the Liberty Formation (Late Ordovician) near St. Leon, Indiana. What caught my eye are the "bumps" near the muscle scar. I've collected and seen a lot of Strophomena brachiopods, but can't recall having ever seen these before. What exactly are they? @Tidgy's Dad
- 4 replies
-
- 1
-
-
- cincinnatian
- indiana
- (and 2 more)
-
Upper Ordovician brachiopiod - Strophomena sp. (?)
Rogue Embryo posted a gallery image in Member Collections
From the album: Camille's fossils - Georgian Bay Formation
Field collection by Camille Martin, September 25, 2021© Camille Martin
-
- 2
-
-
- brachiopod
- georgian bay formation
- (and 4 more)
-
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
The major difference between S. billingsi and S. filitexta is the lack of enclosed muscle scars and S. billingsi tend to be smaller. #2 shows the difficulty for me - it shows a muscle scar - is it a broken enclosed one or is this normal for S. billingi? I don't know for sure. #3 S. billingi wasn't reported by authors as occurring into Platteville formation but I found shell hashes full of it into Mifflin Formation. I still have to look through a lot of individual platteville fossils in the future to see if other Strophomena species are represented - I have seen hints of possible S. septae. S. billingsi occurs in both Platteville and Decorah formation. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Most abundant of the three Strophomena species in Decorah Formation and the largest. #1 shows the most significant feature that differs S. filitexta from S. billingi - the complete enclosed muscle ridges. #2 shows the significant different (at least in individuals that have both halves of shells) between Strophomena from Oepikina/Rafinesquina. Only Strophomena have the triangular structure enclosing where its weak hinge teeth are. #3 Shows the diversity into shapes - this is one of the few highly inflated forms I have found of S. filitexta. I have a lot of difficulty telling the smaller individuals apart between S. filitexta and S. billingi at present if muscle scars is not shown. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Locally common? Most of those individuals were found in one layer this year. One of three official species of Strophomena from Decorah/Platteville Formation at least in Minnesota. #1 It resembles Strophomena filitexta into having an enclosed muscle scar. But it differs greatly from Strophomena filitexta into several ways - one of the most noticeable ways is into having a prominent central septae that run down the center. The other two Strophomena species lacks that prominent central septae that runs all the way down the shell. #2 is a false sulcus that runs down the outside of the shell. In vast majority of individuals that I have looked at, only one half have the false sulcus on the outside and often it is not that easy to find, being a subtle depression that runs down the middle of the shell on the outside. #3 On the outside of the shell the costae is more uniform compare to the other two Strophomena species. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Strophomena filitexta - very abundant in both decorah formation and platteville formation. Usually more variable in shape and get bigger in decorah formation. -
From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota
Strophomena septata. Much rarer than Strophomena filitexta. Tend to be uniform in costae and more finer than Strophomena filitexta. -
Fossil forum, Good morning. I have been looking for literature on the following for a while now, and have not been successful. I was wondering if anyone already had information on the following, or can direct me to a place where I can look for it myself. Brachiopods, specifically Lingulids (classification and identification) Salopina genus ( classification and identification), this genus was moved from Orthis, for further clarification Rhychonellida (classification and identification, at least to the genus level). Camarotoechia genus (classification and identification); Strophomena genus (classification and identification); Gastropods, specifically Platyceras (classification and identification) Bivalves, specifically Modiolopsis and related genera (classification and identification) Ptychopteria genus (also known as Actinopteria). I am also interested in the fauna of fossil formations in northeastern Maine, specifically the Edmunds, Eastport, and Leighton formations. Thanks in advance!
-
Leptaema on the right. What's on the left? Don't know what this is, but they look almost like crinoid stems. Some of the Strophomena I picked up.
-
From the album: Ordovician Fossils (by Peat Burns)
Strophomena planumbona (Brachiopoda) Late Ordovician: Liberty Formation St. Leon, Indiana, USA© 2017 Peat Burns - All Rights Reserved
-
- 1
-
-
- brachiopoda
- indiana
- (and 2 more)
