Trilobites of the Carrara Formation
NOPAH RANGE, INYO CO., MOJAVE DESERT, SE OF DEATH VALLEY, CALIFORNIA
Lower-Middle Cambrian
-approx. 95 species total in 9 Members of the Formation
-subdivided into 9 Members (youngest first):
Desert Range Limestone (Mid. Cambrian)
Glossopleura sp.
Jangle Limestone Member (Mid. Cambrian)
Albertella longwelli Palmer in Palmer & Halley, 1979
Mexicella grandoculus Palmer in Palmer & Halley, 1979
Mexicaspis radiatis Palmer in Palmer & Halley, 1979
Nyella clinolimbata (Fritz, 1968)
Ptarmiganoides hexantha Palmer in Palmer & Halley, 1979
Volocephalina connexa Palmer in Palmer & Halley, 1979
Pahrump Hills Shale Member (Mid. Cambrian)
Albertellina aspinosa Palmer in Palmer & Halley, 1979
Albertelloides rectimarginatus Palmer in Palmer & Halley, 1979
Caborcella pseudaulax Palmer in Palmer & Halley, 1979
Caborella reducta Palmer in Palmer & Halley, 1979
Chancia venusta (Resser, 1939)
Elrathina antiqua Palmer in Palmer & Halley, 1979 [=Ptychoparella antiqua (Palmer in Palmer & Halley, 1979)
Kootenia germana Resser, 1939
Pachyaspis gallagari Fritz, 1968
Pagetia resseri Kobayashi, 1943
Ptychoparella obscurus (Palmer in Palmer & Halley 1979 ) [=Sysacephalus obscurus Palmer in Palmer & Halley 1979]
Volocephalina connexa Palmer in Palmer & Halley, 1979
Zancanthoides sp.
Red Pass Limestone Member (Mid. Cambrian)
Kochaspis liliana (Walcott, 1886)
Kochiella augusta (Walcott, 1886) [=Kochaspis augusta]
Kochiellina groomensis Palmer in Palmer & Halley, 1979
Kochiellina janglensis Palmer in Palmer & Halley, 1979
Plagiura cercops (Walcott, 1917)
Plagiura extensa Palmer in Palmer & Halley, 1979
Plagiura retracta Palmer in Palmer & Halley, 1979
Hadrocephalites sp. [=Schistometopus sp.]
Pyramid Shale Member (Early-Mid. Cambrian)
Early Cambrian trilobites from the Pyramid Shale in the Nopah Range, Inyo County, California
Bolbolenellus brevispinus Palmer, 1998
Nephrolenellus multinodus (Palmer in Palmer & Halley, 1979) [=Olenellus multinodus Palmer in Palmer & Halley, 1979]
Olenellus (Mesonacis) fremonti (Walcott, 1910)
Olenellus (Mesonacis) n. sp. 3
Olenellus fowleri Palmer, 1998
"Olenellus" cf. fowleri Palmer, 1998
Olenellus (Olenellus) gilberti Meek in White, 1874
Olenellus (Paedeumias) clarki (Resser, 1928)
Olenellus (Paedeumias) terminatus
Palmer, 1998
OryctocephalinaeTonopahella
goldfieldensis Sundberg and McCollum,
2003
ptychopariid spp.
-not sure if O. clarki occurs up this high.
Middle Cambrian forms from the Groom and Belted ranges in western Nevada (Lincoln Co.)
Kochiella augusta (Walcott, 1886) [=Kochaspis augusta]
Kochiella rasetti Sundberg & McCollum, 2002
Oryctocephalus nyensis Palmer in Palmer & Halley, 1979
Pagetia sp.
Poliella lomataspis Palmer in Palmer & Halley, 1979
Ptychoparella longus (Palmer in Palmer & Halley, 1979) [=Sysacephalus longus Palmer in Palmer & Halley, 1979]
Gold Ace Limestone Member (Early Cambrian)
Bolbolenellus euryparia (Palmer, in Palmer & Halley 1979)
Bristolia brachyoma (Palmer)
Olenellus (Mesonacis) fremonti (Walcott, 1910)
Olenellus puertoblancoensis (Lochman, 1952)
"Olenellus" cf. fowleri Palmer, 1998
Olenellus (Olenellus) gilberti Meek in White, 1874
Olenellus howelli (Meek, 1874) (or is it Meek in White, 1874?)
Olenellus (Paedeumias) terminatus Palmer, 1998
Olenellus sp.
"Olenellus" n. sp. 1
"Olenellus" n. sp. 2 (cf. robsonensis Burling)
Olenellus (Olenellus) n. sp. 3
Zacanthopsis n. sp. 1
ptychopariid spp.
-not certain about the occurence of O. howelli and O. puertoblancoensis
Undifferentiated Echo Shale Member and Eagle Mountain Shale Member trilobites:
(in the Nopah Range)
Arcuolenellus arcuatis (Palmer in Palmer & Halley, 1979) [=Olenellus arcuatis Palmer in Palmer & Halley, 1979]
Arcuolenellus cf. megafrontalis (Vaccari)
Bolbolenellus euryparia (Palmer in Palmer & Halley, 1979)
Bolbolenellus n. sp. 1
Bristolia anteros Palmer in Palmer & Halley, 1979
Bristolia bristolensis (Resser, 1928)
Bristolia fragilis Palmer in Palmer & Halley, 1979
Bristolia insolens (Resser, 1928)
"Bristolia" mohavensis (Crickmay, 1933) or is it Crickway? - also Resser, 1928?
Bristolia n. sp. 1
Bristolia n. sp. 2
Bristolia n. sp. 3
Bristolia n. sp. 4
Bristolia n. sp. 5
Olenellus (Paedeumias) clarki (Resser, 1928)
Olenellus (Mesonacis) cylindricus (Palmer)
Olenellus (Olenellus) gilberti Meek in White, 1874
Olenellus (Mesonacis) fremonti (Walcott, 1910)
Olenellus howelli Meek in White, 1874
Olenellus (Paedeumias) nevadensis (Walcott, 1910)
Olenellus puertoblancoensis (Lochman, 1952)
"Olenellus" cf. turmalis Cowie
Olenellus (Paedeumias) terminatus Palmer, 1998
Olenellus (Paedeumias) cf. transitans (Walcott)
Olenellus (Olenellus) n. sp. 1
Olenellus (Olenellus) n. sp. 2
"Olenellus" n. sp. 1
"Olenellus" n. sp. 2 (cf. robsonensis Burling)
Olenellus (Mesonacis) n. sp. 1
Olenellus (Mesonacis) n. sp. 2
Olenellus (Paedeumias) n. sp. 1
Olenellus (Paedeumias) n. sp. 2
Peachella brevispina Palmer in Palmer & Halley, 1979
Peachella iddingsi (Walcott, 1884)
bristoliinae n. gen. 1 n. sp. 1
biceratopsinae n. gen. 1 n. sp. 1
biceratopsinae n. gen. 1 n. sp. 2
biceratopsinae n. gen. 1 n. sp. 3
ptychopariid spp.
"The Thimble Limestone Member is not present in the Nopah Range, thus the two shale members are locally undivided. Take a look at Figs. 5 & 6 in Palmer & Halley, 1979 and you'll see that the 0 isopach line for both the Thimble and Gold Ace Limestone members denotes their absence in a number of mountain ranges east of Death Valley. For some reason, the Lower Cambrian limestone members of the Carrara Formation have a much more restricted geographic distribution than the Middle Cambrian limestone members." If you have an idea why this is, please contact us, or Dr. Linda McCollum.
-not certain about the occurence of O. howelli and O. puertoblancoensis
Echo Shale Member (Early Cambrian)
(not complete)
Olenellus clarki (Resser, 1928)
Peachella brevispina Palmer in Palmer & Halley, 1979
Thimble Limestone Member (Early Cambrian)
Bristolia anteros Palmer in Palmer & Halley, 1979
Bristolia bristolensis (Resser, 1928)
Bristolia fragilis Palmer in Palmer & Halley, 1979
Olenellus (Paedeumias) clarki (Resser, 1928)
Olenellus euryparia Palmer in Palmer & Halley, 1979
Olenellus (Mesonacis) fremonti (Walcott, 1910)
Olenellus howelli Meek in White, 1874
Olenellus puertoblancoensis (Lochman, 1952)
Peachella brevispina Palmer in Palmer & Halley, 1979
Peachella iddingsi (Walcott, 1884)
Eagle Mountain Shale Member (Early Cambrian)
(not complete)
Arcuolenellus arcuatis (Palmer in Palmer & Halley, 1979) [=Olenellus arcuatis Palmer in Palmer & Halley, 1979]
Olenellus (Mesonacis) cylindricus (Palmer)
Emigrant Pass Member, Zabriskie (Quartzite) Formation:
-no trilobites reported
CARRARA FORMATION, EMIGRANT PASS, NOPAH RANGE, INYO CO., MOJAVE DESERT, SE OF DEATH VALLEY, CALIFORNIA
Lower-Middle Cambrian
Arcuolenellus arcuatis (Palmer in Palmer & Halley, 1979) [=Olenellus arcuatis Palmer in Palmer & Halley, 1979]
Arcuolenellus cf. megafrontalis (Vaccari)
Bolbolenellus brevispinus Palmer, 1998
Bolbolenellus euryparia ( Palmer in Palmer & Halley, 1979)
Bolbolenellus n. sp. 1
Bristolia anteros Palmer in Palmer & Halley, 1979
"Bristolia" brachyoma (Palmer)
Bristolia bristolensis (Resser, 1928)
Bristolia fragilis Palmer in Palmer & Halley, 1979
Bristolia insolens (Resser, 1928)
"Bristolia" mohavensis (Crickmay, 1933 - or is it Resser, 1928?)
Bristolia n. sp. 1
Bristolia n. sp. 2
Bristolia n. sp. 3
Bristolia n. sp. 4
Bristolia n. sp. 5
Bristolia n. sp. (Mount, 1980, fig. 16)
Crassifimbra n. sp. (see Mount, 1980)
Nephrolenellus multinodus (Palmer in Palmer & Halley, 1979) [=Olenellus multinodus Palmer in Palmer & Halley, 1979]
Olenellus brachyomma Palmer in Palmer & Halley, 1979
Olenellus (Paedeumias) clarki (Resser, 1928)
Olenellus (Mesonacis) cylindricus (Palmer)
Olenellus euryparia Palmer in Palmer & Halley, 1979
"Olenellus" cf. fowleri Palmer, 1998
Olenellus (Mesonacis) fremonti (Walcott, 1910)
Olenellus (Olenellus) gilberti Meek in White, 1874
Olenellus howelli Meek in White, 1874
Olenellus (Paedeumis) nevadensis (Walcott, 1910)
Olenellus puertoblancoensis (Lochman, 1952)
"Olenellus" cf. turmalis Cowie
Olenellus (Paedeumias) terminatus Palmer, 1998
Olenellus (Paedeumias) cf. transitans (Walcott)
Olenellus (Olenellus) n. sp. 1
Olenellus (Olenellus) n. sp. 2
Olenellus (Olenellus) n. sp. 3
"Olenellus" n. sp. 1
"Olenellus" n. sp. 2 (cf. robsonensis Burling)
Olenellus (Mesonacis) n. sp. 1
Olenellus (Mesonacis) n. sp. 2
Olenellus (Mesonacis) n. sp. 3
Olenellus (Paedeumias) n. sp. 1
Olenellus (Paedeumias) n. sp. 2
Peachella brevispina Palmer in Palmer & Halley, 1979
Peachella iddingsi (Walcott, 1884)
Periomma n. sp. (see Mount, 1980)
Zacanthopsis n. sp. 1
bristoliinae n. gen. 1 n. sp. 1
biceratopsinae n. gen. 1 n. sp. 1
biceratopsinae n. gen. 1 n. sp. 2
biceratopsinae n. gen. 1 n. sp. 3
ptychopariid n. gen. & sp. B (see Mount, 1980)
ptychopariid spp.
References:
Ed Fowler, 1999, "Biostratigraphy of upper Dyeran strata of the Carrara Formation, Emigrant Pass, Nopah Range, California" p. 46-54 in A. R. Palmer (ed.) Laurentia 99, V field conference of the Cambrian stage subdivision working group, international subcommission on Cambrain stratigraphy, Utah, Nevada, California, U.S.A., September 12-22, 1999, 65 pages.
Mount, Jack D. 1980.An Early Cambrian Fauna from the Carrara Formation, Emigrant Pass, Nopah Range, Inyo County, California: A Preliminary Note. Southern California Paleontological Society Special Publications, no. 2, p. 78-80, 1 fig.
Palmer, A. R. and Halley, R. B. (1979) Physical
Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and
Middle Cambrian) in the Southern Great Basin, United States Geological Survey
Professional Paper 1047
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