El Antimonio (Triassic of Mexico)

Also known as IU-5170-1

Where: Sonora, Mexico (30.8° N, 112.6° W: paleocoordinates 8.9° N, 50.2° W)

• coordinate based on nearby landmark

When: Tuvalian (232.0 - 221.5 Ma)

• JA: originally entered as Carnian; the Tropites dilleri zone is Tuvalian according to Lucas et al. 2012

Environment/lithology: marine; limestone

Size class: mesofossils

Reposited in the USNM

Primary reference: P. Schaefer and E. Fois. 1987. Systematics and evolution of Triassic Bryozoa. Geologica et Palaeontologica 21:173-225 [D. Bottjer/C. Powers/C. Jamet]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 32836: authorized by David Bottjer, entered by Catherine Powers on 16.07.2003, edited by Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

• Also present: a rich ammonoid fauna
Show authors, comments, and common names
unclassified
  -
Spriogmoceras shastense1
Spriogmoceras shastense1
Unit 10/11 - Hummocky sandstone
Cephalopoda
 Ceratitida - Sandlingitidae
Traskites sp.1, "Clionites fairbanksi" = Clionites (Traskites) fairbanksi1
Traskites sp.1 Hyatt and Smith 1905 ceratite
Unit 10/11 - Hummocky sandstone
"Clionites fairbanksi" = Clionites (Traskites) fairbanksi1 Hyatt and Smith 1905 ceratite
Unit 10/11 - Hummocky sandstone
 Ceratitida - Clionitidae
Sympolycyclus nodifer1
Sympolycyclus nodifer1 Hyatt and Smith 1905 ceratite
Unit 10/11 - Hummocky sandstone
 Ceratitida - Haloritidae
Trachysagenites herbichi1
Trachysagenites herbichi1 Mojsisovics 1893 ceratite
Unit 10/11 - Hummocky sandstone
 Ceratitida - Tropitidae
Tropites dilleri1
Tropites dilleri1 Smith 1904 ceratite
Unit 10/11 - Hummocky sandstone
 Ceratitida - Arcestidae
Arcestes sp.1
Arcestes sp.1 Suess 1865 ceratite
Units 19, 21, 23, 26 - Limestone
 Ceratitida - Trachyceratidae
"Arpadites gabbi" = Trachystenoceras gabbi1, Sirenites nanseni1, Sirenites ovinus1
"Arpadites gabbi" = Trachystenoceras gabbi1 Hyatt and Smith 1905 ceratite
Unit 10/11 - Hummocky sandstone
Sirenites nanseni1 Tozer 1961 ceratite
Units 2 and 4/5 - Limestone
Sirenites ovinus1 Tozer 1994 ceratite
Units 2 and 4/5 - Limestone
 Aulacocerida - Aulacoceratidae
Dictyoconites sp.2
Dictyoconites sp.2 von Mojsisovics 1902 belemnite
 Aulacoceratida - Xiphoteuthididae
Metabelemnites cf. philippii2, "Choanoteuthis antimonioensis n. sp." = Calliconites drakei2
Metabelemnites cf. philippii2 Hyatt and Smith 1905 belemnite
"Choanoteuthis antimonioensis n. sp." = Calliconites drakei2 Smith 1927 belemnite
 Belemnitida - Belemnitidae
Actinoconites sp.2
Actinoconites sp.2 Steinmann 1910 belemnite
Stenolaemata
 Cystoporida -
Cystoporida indet.
Cystoporida indet. Astrova 1964
1Lucas and Estep 1999; 2Miller 1961