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

Emigrantia n. gen. et sp.

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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