Loomis Creek, Snake Mountains (Silurian of the United States)

Where: Elko County, Nevada (41.4° N, 114.9° W: paleocoordinates 11.6° S, 64.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Roberts Mountains Formation, Ludlow (427.4 - 423.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; siltstone

• "Because of the fragmental nature of the sponges and their alignments, they appear to be part of transported sessile benthic assemblages. They probably grew far from where they accumulated."

Size class: macrofossils

Primary reference: J. K. Rigby and B. J. Maher. 1995. Age of the hexactinellid beds of the Roberts Mountains Formation, Snake Mountains, Nevada, and additions to the Silurian sponge fauna. Journal of Paleontology 69(6):1020-1029 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 729: authorized by John Alroy, entered by Mike Sommers on 02.03.1999, edited by Uta Merkel and Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Hexactinellida
 Reticulosa - Protospongiidae
Gabelia fascicula1, Gabelia giganta1, Gabelia intermedia n. sp., Gabelia pedunculus1, ? Protospongia sp.
Gabelia fascicula1 glass sponge
Gabelia giganta1 glass sponge
Gabelia intermedia n. sp. Rigby and Maher 1995 glass sponge
Gabelia pedunculus1 Rigby and Murphy 1983 glass sponge
? Protospongia sp. Salter 1864 glass sponge
 Lyssacinosa - Stiodermatidae
Divaricospongia dilata n. gen. n. sp.
Divaricospongia dilata n. gen. n. sp. Rigby and Maher 1995 glass sponge
 Lyssacinosa - Brachiospongiidae
Fistellaspongia inclinata n. gen. n. sp.
Fistellaspongia inclinata n. gen. n. sp. Rigby and Maher 1995 glass sponge
Pterobranchia
 Graptoloidea - Monograptidae
"Bohemograptus tenuis" = Bohemograptus bohemicus tenuis2
"Bohemograptus tenuis" = Bohemograptus bohemicus tenuis2 Boucek 1936 graptolite
subsp. tenuis
1Rigby et al. 1991; 2Wagner 2020