Where: Washington County, Arkansas (35.9° N, 94.0° W: paleocoordinates 8.8° S, 31.7° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Brentwood Member (Bloyd Formation), Morrowan (323.2 - 318.6 Ma)
• bed-level stratigraphic resolution
Environment/lithology: marine; lithified shale
Size class: macrofossils
Primary reference: J. K. Rigby and W. L. Manger. 1994. Morrowan lithistid demosponges and hexactinellids from the Ozark Mountains of northwestern Arkansas. Journal of Paleontology 68(4):734-746 [W. Kiessling/U. Merkel]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 111781: authorized by Wolfgang Kiessling, entered by Uta Merkel on 28.06.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
Blastoidea | |
Pentremites sp. Say 1820 blastoid | |
Strophomenata | |
Linoproductus sp. Chao 1927 | |
"Tesuquea sp." = Brachiotesuquea
"Tesuquea sp." = Brachiotesuquea Ceccolini and Cianferoni 2023 | |
Rhynchonellata | |
Anthracospirifer sp. Lane 1963 | |
Hexactinellida | |
Stioderma hadra n. sp.
Stioderma hadra n. sp. Rigby and Manger 1994 glass sponge | |
Demospongiae | |
Haplistion sphaericum Finks 1960 demosponge | |
Virgaspongia ichnata n. gen. n. sp.
Virgaspongia ichnata n. gen. n. sp. Rigby and Manger 1994 demosponge |