Where: Baja California, Mexico (31.5° N, 116.7° W: paleocoordinates 29.9° N, 68.2° W)
• small collection-level geographic resolution
When: upper Member (Alisitos Formation), Late/Upper Aptian (122.5 - 113.0 Ma)
• Age: "Aptian to middle Albian." Squires and Saul (2004) confirming and following Allison (1974) place this collection in the Late Aptian.
• bed-level stratigraphic resolution
Environment/lithology: shallow subtidal; gray sandstone
Collection methods: mechanical,
Primary reference: E. C. Allison. 1955. Middle Cretaceous gastropoda from Punta China, Baja California, Mexico. Journal of Paleontology 29(3):400-432 [J. Alroy/M. Sommers/J. Alroy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 1881: authorized by John Alroy, entered by Mike Sommers on 10.06.1999, edited by Austin Hendy and Wolfgang Kiessling
Creative Commons license: CC BY (attribution)
Taxonomic list
Echinoidea | |
| |
Gastropoda | |
Pyrazus (Echinobathra) durhami Allison 1955 horn snail | |
? Cerithium emersoni n. sp.
? Cerithium emersoni n. sp. Allison 1955 cerith snail | |
Keilostoma quaidei n. sp.
Keilostoma quaidei n. sp. Allison 1955 snail | |
Natica importuna Nagao 1934 moon snail | |
? Cerithiopsis stantoni n. sp.
? Cerithiopsis stantoni n. sp. Allison 1955 snail | |
Anchura (Perissoptera) hannai n. sp. Allison 1955 snail | |
Tylostoma allisoni n. sp.2
| |
Cimolithium eleanorae n. sp. Allison 1955 snail
Cimolithium miyakoense Nagao 1934 snail
Uchauxia kirki n. sp. Allison 1955 snail
Uchauxia beali n. sp. Allison 1955 snail | |
"Nerinea cf. pseudoconvexa" = Nerinea (Plesioptygmatis) pseudoconvexa, Nerinea (Plesioptygmatis) bosei n. sp.
"Nerinea cf. pseudoconvexa" = Nerinea (Plesioptygmatis) pseudoconvexa Stanton 1947 snail originally entered as "Nerinea cf. pseudoconvexa"
Nerinea (Plesioptygmatis) bosei n. sp. Allison 1955 snail | |
"Aptyxiella (Endiatrachelus) parallela" = Nerinella parallela, Aptyxiella (Aptyxiella) subula
"Aptyxiella (Endiatrachelus) parallela" = Nerinella parallela Anderson and Hanna 1935 snail
Aptyxiella (Aptyxiella) subula Roemer 1888 snail | |
? Tectus thalmanni n. sp. Allison 1955 top snail | |
Angaria (Angaria) gwynae n. sp.
Angaria (Angaria) gwynae n. sp. Allison 1955 snail | |
Bivalvia | |
Caprinuloidea sp. Palmer 1928 rudist | |
Anthozoa | |
""Montastrea" sp." = Montastraea1
| |
Cyathophora sp. Michelin 1843 stony coral | |
Astrocoenia sp. Milne-Edwards and Haime 1848 stony coral | |
Dermosmilia sp. Koby 1884 stony coral |