Bear Cove, north end and east side of Brock Mountain (Triassic of the United States)

Where: California (40.8° N, 122.2° W: paleocoordinates 13.4° N, 53.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hosselkus Formation, Tuvalian (232.0 - 221.5 Ma)

• Zone of Tropites subbullatus, Juvavites subzone

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, black limestone

Size class: macrofossils

Collected by J.P. Smith; reposited in the USNM

Primary reference: A. Hyatt and J. P. Smith. 1905. The Triassic cephalopod genera of America. United States Geological Survey Professional Paper 40:1-394 [D. Bottjer/C. Powers/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 142611: authorized by Matthew Clapham, entered by Matthew Clapham on 14.04.2013, edited by Catherine Powers

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Ostreida - Halobiidae
Halobia gigantea2 Smith 1927 oyster
 Mytilida - Mytilidae
Mytilus ursensis n. sp.2 Smith 1927 mussel
 Trigoniida - Myophoriidae
Myophoria brockensis n. sp.2 Smith 1927 clam
Gastropoda
 Patellogastropoda - Patellidae
"Patella" stuarti n. sp.2 Smith 1927 limpet
Cephalopoda
 Aulacoceratida - Aulacoceratidae
Dictyoconites americanus2 Smith 1927 belemnite
 Aulacoceratida - Xiphoteuthididae
"Atractites drakei n. sp." = Calliconites drakei2
"Atractites drakei n. sp." = Calliconites drakei2 Smith 1927 belemnite
 Ceratitida - Choristoceratidae
"Choristoceras" klamathense n. sp.2 Smith 1927 ceratite
 Ceratitida - Tropitidae
Tropites brockensis n. sp.2 Smith 1927 ceratite
Tropites reticulatus2 Smith 1927 ceratite
Tropites ursensis n. sp.2 Smith 1927 ceratite
Jovites pacificus n. sp.2 Smith 1927 ceratite
Discotropites mojsvarensis2 Smith 1927 ceratite
"Discotropites gemmellaroi" = Discotropites smithi2 Kutassy 1933 ceratite
 Ceratitida - Haloritidae
Juvavites (Anatomites) intermittens2 Mojsisovics 1893 ceratite
Juvavites (Anatomites) obsoletus n. sp.2 Smith 1927 ceratite
Juvavites (Anatomites) konnincki2 Mojsisovics 1893 ceratite
"Sagenites (Trachysagenites) erinaceus" = Trachysagenites erinaceus2 Dittmar 1866 ceratite
 Ceratitida - Metasibiritidae
"Tropiceltites frechi" = Metasibirites frechi
"Tropiceltites frechi" = Metasibirites frechi Hyatt and Smith 1905 ceratite
 Ceratitida - Juvavitidae
"Gonionotites hyatti n. sp." = Bacchites hyatti2, Gonionotites northi n. sp.2
"Gonionotites hyatti n. sp." = Bacchites hyatti2 Smith 1927 ceratite
Gonionotites northi n. sp.2 Smith 1927 ceratite
 Nautilida - Clydonautilidae
Cosmonautilus shastensis n. sp.2 Smith 1927 nautiloid
Proclydonautilus squawensis n. sp.1 Kummel 1953 nautiloid
Proclydonautilus ursensis n. sp.2 Smith 1927 nautiloid
 Nautilida - Grypoceratidae
"Grypoceras (Gryponautilus) cooperi n. sp." = Gryponautilus cooperi2
"Grypoceras (Gryponautilus) cooperi n. sp." = Gryponautilus cooperi2 Smith 1927 nautiloid