Dark Canyon, shelf (Permian of the United States)

Where: New Mexico (32.3° N, 104.3° W: paleocoordinates 4.2° N, 32.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Capitan Formation, Capitanian (264.3 - 259.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified reef rocks

Size class: macrofossils

Primary reference: J. A. Fagerstrom and O. Weidlich. 1999. Strengths and weaknesses of the reef guild concept and quantitative data: Application to the Upper Capitan-massive community (Permian), Guadalupe Mountains, New Mexico-Texas. Facies 40:131-156 [W. Kiessling/W. Kiessling/W. Kiessling]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 95716: authorized by Matthew Clapham, entered by Matthew Clapham on 24.04.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Ascidiacea
 Khmeriamorpha - Khmeriidae
Permosoma sp. sea squirt
Demospongiae
 Agelasida - Virgolidae
Virgola neptunia Girty 1908 demosponge
Virgola rigida Girty 1908 demosponge
 Agelasida - Guadalupiidae
Lemonea conica Senowbari-Daryan 1990 demosponge
Lemonea polysiphonata Senowbari-Daryan 1990 demosponge
Lemonea micra Rigby et al. 1998 demosponge
Guadalupia zitteliana Girty 1908 demosponge
 Agelasida - Thaumastocoeliidae
Sollasia ostiolata Steinmann 1882 demosponge
Girtyocoelia beedei Girty 1909 demosponge
 Agelasida - Auriculospongiidae
Gigantospongia discoforma Rigby and Senowbari-Daryan 1996 demosponge
Cavusonella caverna Rigby et al. 1989 demosponge
 Agelasida - Preperonidellidae
"Peronidella cf. rigbyi" = Preperonidella rigbyi Senowbari-Daryan 1991 demosponge
Bicoelia guadalupensis Rigby et al. 1998 demosponge
Minispongia constricta Girty 1908 demosponge
 Verticillitida - Colospongiidae
Parauvanella minima Senowbari-Daryan 1990 demosponge
Exaulipora permica Senowbari-Daryan 1990 demosponge