UCMP D-5252, Lookout Hill, Southern Arrow Canyon Range (Permian of the United States)

Where: Clark County, Nevada (36.6° N, 114.8° W: paleocoordinates 9.9° N, 38.5° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Bird Spring Formation, Artinskian (290.1 - 279.3 Ma)

• Bed "I" is approximately 5 feet thick

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, gray, argillaceous, silty limestone

• Silty and argillaceous and ranges from tan to gray with weathered surfaces generally medium gray

Size classes: macrofossils, mesofossils, microfossils

Preservation: replaced with silica

Collection methods: bulk, chemical,

Primary reference: L. P., J.r. Plas. 1972. Upper Wolfcampian (?) Mollusca from the Arrow Canyon Range, Clark County, Nevada. Journal of Paleontology 46(2):249-260 [D. Bottjer/M. Clapham/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39157: authorized by David Bottjer, entered by Matthew Clapham on 21.05.2004, edited by Pete Wagner and Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

• Abundant - more than 25 specimens; Common - 10-25 specimens; Uncommon - 5-10 specimens; Rare - less than 5 specimens
Show authors, comments, and common names
Gnathostomata
  -
Osteichthyes indet.
Osteichthyes indet. bony fish
Vertebrae
Echinoidea
  - Archaeocidaridae
Archaeocidaris sp.
Archaeocidaris sp. M'Coy 1844 sea urchin
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
Polychaeta
 Sabellida - Serpulidae
"Spirorbis" sp.
"Spirorbis" sp. Daudin 1800
Rhynchonellata
 Terebratulida - Dielasmatidae
Dielasma sp.
Dielasma sp. King 1856
 Athyridida - Athyrididae
Composita sp.
Composita sp. Brown 1849
Stenolaemata
 Cryptostomida -
Cryptostomida spp.
Cephalopoda
 Orthoceratoidea -
Orthocerida indet.
Orthocerida indet. Kuhn 1940
Straight nautiloid
 Nautilida -
Nautilida indet.
Nautilida indet. Agassiz 1847 nautiloid
Coiled nautiloid
Rostroconchia
 Conocardiida - Conocardiidae
Minycardita sectilis n. gen. n. sp.2, Minycardita sectilis4
Minycardita sectilis n. gen. n. sp.2 Hoare and Plas 2003
Minycardita sectilis4 Hoare and Plas 2003
 Conocardiida - Pseudobigaleaidae
"Hadropipetta nevadaensis n. sp." = Hadropipetta nevadensis2
"Hadropipetta nevadaensis n. sp." = Hadropipetta nevadensis2 Hoare and Plas 2003
Gastropoda
 Cerithimorpha - Orthonemidae
Palaeostylus sp.
Palaeostylus sp. Mansuy 1914 snail
 Caenogastropoda - Goniasmatidae
Goniasma spp.
Goniasma spp. Tomlin 1930 snail
 Caenogastropoda - Orthonematidae
Orthonema spp.
Orthonema spp. Meek and Worthen 1862 snail
 Caenogastropoda - Meekospiridae
Meekospira spp.
Meekospira spp. Ulrich and Scofield 1897 snail
 Bellerophontida - Bellerophontidae
Bellerophon ? deflectus
Bellerophon ? deflectus Chronic 1952 snail
 Euomphalina - Microdomatidae
Glyptospira arelela n. sp., Amaurotoma zappa n. sp.
Glyptospira arelela n. sp. Plas 1972 snail
Amaurotoma zappa n. sp. Plas 1972 snail
 Euomphalina - Anomphalidae
Anomphalus jaggerius n. sp.
Anomphalus jaggerius n. sp. Plas 1972 snail
 Euomphalina - Pseudophoridae
Sallya sp.
Sallya sp. Yochelson 1956 snail
 Euomphalina - Omphalotrochidae
Omphalotrochus sp.
Omphalotrochus sp. Meek 1864 snail
 Euomphalina - Euomphalidae
Euomphalidae sp.5
Euomphalidae sp.5 White 1877 snail
 Murchisoniina - Lophospiridae
Platyworthenia sp.
Platyworthenia sp. Chronic 1952 snail
 Murchisoniina - Gosseletinidae
Apachella spp.
Apachella spp. Winters 1956 snail
 Murchisoniina - Soleniscidae
Soleniscus sp.
Soleniscus sp. Meek and Worthen 1860 snail
 Neritoidea - Naticopsidae
Naticopsis sp., Colpites sp.
Naticopsis sp. M'Coy 1844 snail
Colpites sp. Knight 1936 snail
 Cycloneritida - Trachyspiridae
Trachydomia sp.
Trachydomia sp. Meek and Worthen 1866 snail
Bivalvia
 Nuculanida - Polidevciidae
Polidevcia sp.
Polidevcia sp. Tschernyschev 1943 clam
 Nuculida - Nuculidae
Nuculavus levatiformis1
Nuculavus levatiformis1 Walcott 1884 nut clam
 Carditida - Astartidae
Astartella subquadrata
Astartella subquadrata Girty 1909 clam
 Pholadomyida - Edmondiidae
"Allorisma" sp.
"Allorisma" sp. King 1844 clam
 Trigoniida - Schizodidae
Schizodus sp.
Schizodus sp. King 1844 clam
 Ostreida - Bakevelliidae
Bakevellia spp.
Bakevellia spp. King 1848 oyster
 Pectinida -
Pectinoidea indet.
Pectinoidea indet. Rafinesque 1815 scallop
Two species
 Arcida - Parallelodontidae
Grammatodon sp.
Grammatodon sp. Meek and Hayden 1860 clam
Scaphopoda
 Dentaliida - Prodentaliidae
Prodentalium sp.
Prodentalium sp. Young 1942 tusk shell
 Dentaliida - Dentaliidae
Plagioglypta sp.
Plagioglypta sp. Pilsbry 1898 tusk shell
Polyplacophora
 Paleoloricata - Helminthochitonidae
Helminthochiton sp.
Helminthochiton sp. Salter 1846 chiton
 Neoloricata - Acutichitonidae
Acutichiton nevadensis n. sp.3, Arcochiton richardsoni n. sp.3
Acutichiton nevadensis n. sp.3 Hoare et al. 2002 chiton
Arcochiton richardsoni n. sp.3 Hoare et al. 2002 chiton
 Neoloricata - Gryphochitonidae
Gryphochiton distinctus n. sp.3
Gryphochiton distinctus n. sp.3 Hoare et al. 2002 chiton
Ostracoda
 Podocopida -
Bairdioidea spp.
Bairdioidea spp. Sars 1888 ostracod
 Palaeocopida -
Kirkbyoidea sp.
Kirkbyoidea sp. Ulrich and Bassler 1906 ostracod
Trilobita
 Proetida - Phillipsiidae
"Phillipsia" sp.
"Phillipsia" sp. Portlock 1843 trilobite
unclassified
  -
Porifera "monaxon indet."
Demospongiae
 Lithistida -
Lithistida indet.
Chlorophyceae
 Dasycladales - Dasycladaceae
"Mizzia cf. yabei" = Stolleyella yabei
"Mizzia cf. yabei" = Stolleyella yabei Karpinsky 1908
Foraminifera
 Fusulinoidea - Staffellidae
Staffella sp.
1Hendy 2008; 2Hoare and Plas 2003; 3Hoare et al. 2002; 4Vendrasco et al. 2010; 5Wagner 2023