Where: Socorro County County, New Mexico (33.9° N, 106.3° W: paleocoordinates 2.0° S, 38.4° W)

• coordinate estimated from map

When: Story Formation (Hansbourg Group), Missourian (306.0 - 303.7 Ma)

• This is the general location of Thompson's (1942) type section of his Keller Group, and includes underlying strata down to his Council Springs Limestone.... In the following discussion of the Late Pennsylvanian paleontology of Bruton Canyon, fossil occurrences are related to the stratigraphic units reported by Thompson (1942; Fig. 3).

Environment/lithology: coarse-grained, gray, white limestone

Size classes: macrofossils, mesofossils, microfossils

• In the lower part of this bed (locality 4437), Composita subtilita (attaining a maximum length of about 21 mm and including the wide, relatively thin “C. ovata” morph), and the small productides Hystriculina wabashensis and H. “fragilis” dominate the fauna (totaling 69% of the 126 brachiopods collected), although specimens of larger productides (especially Antiquatonia, 13%) are also oderately common. Other brachiopod taxa, notably Enteletes hemiplicata, Linoproductus cf. L. platyumbonus, Phricodothyris perplexa, and Beecheria bovidens (totaling 10% of brachiopod specimens) are represented by only a few specimens. Reticulatia americana, Crurithyris, Neospirifer alatus, and Echinaria semipunctata are each rare in this assemblage. Crinoid debris, isolated fusulinids, and single specimens

•of the bivalves Schizodus and Permophorus complete the list of invertebrates observed.

Preservation: cast

Collection methods: Fossil collections were made from six intervals in Thompson's Missourian-Virgilian section here. Localities and figured specimens in this paper bear New Mexico Museum of Natural History and Science (NMMNH) numbers.

•The largest and most species-rich assemblage in the Bruton Canyon section occurs in Thompson's bed 18B, a 2.5 m-thick ledge-forming limestone near the middle of the Del Cuerto Member. A collection of loose specimens was made from this limestone where it had eroded to a rubbly slope.

Primary reference: B.S. Kues. 2009. Late Pennsylvanian invertebrate paleontology of Bruton Canyon, northern Sierra Oscura, Socorro County, New Mexico. In V. Lueth, S.G. Lucas, R.M. Chamberlain (eds.), Geology of the Chupadera Mesa 249-266 [B. Seuss/B. Seuss]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 215691: authorized by Barbara Seuss, entered by Barbara Seuss on 19.11.2020

Creative Commons license: CC BY (attribution)