UCMP loc. D-6820, Mexican Gulch, Mazourka Canyon, Inyo Mountains (Ordovician of the United States)

Also known as Orthambonites decipiens association

Where: Inyo County, California (36.9° N, 118.1° W: paleocoordinates 5.9° S, 84.8° W)

• coordinate estimated from map

When: Upper Member (Barrel Spring Formation), Middle Ordovician (470.0 - 458.4 Ma)

• "early to mid M. Ord."

Environment/lithology: offshore; shale

• "terrigenous mud (sh and sandy shale above nodular ls). subtidal. miogeocline"

Size class: macrofossils

Primary reference: W. B. N. Berry, D. A. Lawson, and E. S. Yancey. 1979. Species diversity patterns in some middle Ordovician communities from California-Nevada. Palaeogeography, Palaeoclimatology, Palaeoecology 26:99-116 [M. Uhen/J. Ju/J. Ju]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 424: authorized by Jack Sepkoski, entered by Mike Sommers on 03.12.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "R.J. Ross, Jr. 1967. Some M. Ord. brachiopods and trilobites from the Basin and Range, western United States. USGS Prof Paper 523-d, ppD1-D4. W.B.N. Berry, D.A. Lawson and E.S. Yancey, 1979. Species diversity patterns in some middle Ord. communities from Calif-NV. Paleo,Paleo,Paleo 26:99-116. Stilphen, 1971"
Show authors, comments, and common names
Anthozoa
 Rugosa -
? Rugosa indet.
? Rugosa indet. horn coral
tetracoral - originally entered as "? Rugosa indet."
unclassified
  -
Porifera indet.
Porifera indet. Grant 1836
sponge
Pterobranchia
 Graptoloidea - Dicranograptidae
Dicellograptus sp.
Dicellograptus sp. Hopkinson 1871 graptolite
Crinoidea
  -
? Crinoidea indet.
? Crinoidea indet. Miller 1821 Sea lily
crinozoans - originally entered as "? Crinoidea indet."
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
bryozoans
Rhynchonellata
 Orthida - Plaesiomyidae
Valcourea sp., Valcourea cf. plana
Valcourea sp. Raymond 1911
Valcourea cf. plana Cooper 1956
originally entered as "Valcourea cf. plana"
 Orthida - Orthidae
Orthambonites decipiens
Lingulata
 Lingulida -
Lingulida indet.
Lingulida indet. Waagen 1885
linguloid
Gastropoda
 Streptoneura -
? Archaeogastropoda indet.
? Archaeogastropoda indet. Thiele 1925 snail
gastropods - originally entered as "? Archaeogastropoda indet."
Trilobita
 Trinucleida - Raphiophoridae
? Ampyx sp., Lonchodomas sp.
? Ampyx sp. Dalman 1827 trilobite
originally entered as "? Ampyx sp."
Lonchodomas sp. Angelin 1854 trilobite
 Asaphida - Asaphidae
? Isotelus sp.
? Isotelus sp. Dekay 1824 trilobite
originally entered as "? Isotelus sp."
 Asaphida - Remopleurididae
Remopleurides sp.
Remopleurides sp. Portlock 1843 trilobite