Alisitos Fm. (UCB A-8331): Late/Upper Aptian, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa
- Scleractinia
- Montlivaltiidae
|
||||||||||
Montlivaltia sp.
Lamouroux 1821
|
a category | |||||||||
Placosmilia sp.
Milne-Edwards and Haime 1848
|
a category | |||||||||
Gastropoda
- Liotiidae
|
||||||||||
Encycloscala emersoni n. sp.
Allison 1955
|
c category | |||||||||
originally entered as "Encycloscala emersoni" | ||||||||||
Gastropoda
- Trochidae
|
||||||||||
Calliostoma (Calliostoma) aff. cragini
(Stanton 1947)
|
f category | |||||||||
original and current combination Calliostoma cragini | ||||||||||
(Calliostoma) - originally entered as "Calliostoma aff. cragini" | ||||||||||
Gastropoda
- Epitoniidae
|
||||||||||
Opalia (Crassiscala) riachuelanum
(Maury 1936)
|
f category | |||||||||
Amaea (Confusiscala) sp.
(de Boury 1909)
|
r category | |||||||||
original and current combination Confusiscala | ||||||||||
Gastropoda
- Metacerithiidae
|
||||||||||
Metacerithium sp.
Cossmann 1906
|
f category | |||||||||
Gastropoda
- Turritellidae
|
||||||||||
Mesalia (Mesalia) mauryae n. sp.
Allison 1955
|
c category | |||||||||
? Turritella durhami n. sp.
Allison 1955
|
f category | |||||||||
Turritella (Haustator) aff. seriatimgranulata
(Roemer 1849)
|
a category | |||||||||
original and current combination Turritella seriatimgranulata | ||||||||||
(Haustator) - originally entered as "Turritella aff. seriatimgranulata" | ||||||||||
Gastropoda
- Potamididae
|
||||||||||
Pyrazus (Echinobathra) durhami
Allison 1955
|
f category | |||||||||
Gastropoda
- Tylostomatidae
|
||||||||||
Tylostoma allisoni
Squires and Saul 2004
|
Squires and Saul 2004 | r category | ||||||||
Gastropoda
- Aporrhaidae
|
||||||||||
Anchura (Anchura) andersoni n. sp.
Allison 1955
|
c category | |||||||||
Gastropoda
- Neogastropoda
- Fasciolariidae
|
||||||||||
Euthriofusus wenzi n. sp.
Allison 1955
|
c category | |||||||||
Gastropoda
- Purpurinidae
|
||||||||||
Microschiza (Cloughtonia) scalaris
(Conrad in Lynch 1852)
|
f category | |||||||||
Gastropoda
- Naticidae
|
||||||||||
Natica japonica
(Nagao 1934)
|
a category | |||||||||
original and current combination Vanikoro japonica | ||||||||||
Gastropoda
- Triforidae
|
||||||||||
Cerithiella (Cerithiella) ? kickapooense
(Stanton 1947)
|
c category | |||||||||
(Cerithiella) - originally entered as "Cerithiella ? kickapooense" | ||||||||||
Gastropoda
- Cassiopidae
|
||||||||||
Cassiope (Gymnetome) gwynae n. sp.
Allison 1955
|
a category | |||||||||
Cassiope (Cassiope) kleinpelli n. sp.
Allison 1955
|
a category | |||||||||
Gastropoda
- Heterostropha
- Acteonellidae
|
||||||||||
Actaeonella fusiformis
Coquand 1865
|
a category | |||||||||
Gastropoda
- Heterostropha
- Ringiculidae
|
||||||||||
? Oligoptycha popenoei n. sp.
Allison 1955
|
r category | |||||||||
Gastropoda
- Heterostropha
- Tubiferidae
|
||||||||||
Pseudonerinea stantoni n. sp.
Allison 1955
|
c category | |||||||||
Pseudonerinea stirtoni
Allison 1955
|
a category | |||||||||
n. sp. | ||||||||||
Gastropoda
- Heterostropha
- Nerinellidae
|
||||||||||
Aptyxiella (Endiatrachelus) parallela
(Anderson and Hanna 1935)
|
c category | |||||||||
recombined as Nerinella parallela | ||||||||||
Bivalvia
- Cardiida
- Veneridae
|
||||||||||
Resatrix sp.
Casey 1952
|
c category | |||||||||
Bivalvia
- Cardiida
- Cardiidae
|
||||||||||
? Integricardium sp.
Rollier 1912
|
f category | |||||||||
originally entered as "? Intergricardium sp." | ||||||||||
Protocardia stonei
|
r category | |||||||||
Bivalvia
- Trigoniida
- Trigoniidae
|
||||||||||
Trigonia stolleyi
Hill 1893
|
r category | |||||||||
Scaphopoda
- Dentaliida
- Dentaliidae
|
||||||||||
Dentalium sp.
Linnaeus 1758
|
c category | |||||||||
see common names |
Geography
Country: | Mexico | State/province: | Baja California |
Coordinates: | 31.5° North, 116.7° West (view map) | ||
Paleocoordinates: | 29.9° North, 68.2° West | ||
Geographic resolution: | small collection |
Time
Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
Stage: | Aptian | 10 m.y. bin: | Cretaceous 3 |
*International age/stage: | Aptian - Albian | ||
Key time interval: | Late/Upper Aptian | ||
Age range of interval: | 122.46000 - 112.03000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Lithology and environment
Primary lithology: | volcaniclastic,brown,gray,green lithified siltstone |
Lithology description: "Moderately well consolidated, massive, gray-green to brown tuffaceous siltstone...~10-15 m above lowest mid cret. exposures along south side of Punta China." | |
Environment: | shallow subtidal indet. |
Taphonomy
Modes of preservation: | body |
Collection methods and comments
Collection methods: | mechanical,field collection |
Reason for describing collection: | taxonomic analysis |
Taxonomic list comments:Abundances: A = 20+, C = 6-20, F = 3-5, R = 1-2. "A spectacular feature of the middle Albian deposits at Punta China is the fine preservation exhibited by many of the fossils. Despite the coarseness of some of the volcanic breccias, fragile tests of Forams, echinoids, and small molluscs are almost perfectly preserved. Pelecypods almost always occur with both valves intact. Some gastropods retain original pigmentation." |
Metadata
Database number: | 1890 | ||
Authorizer: | J. Alroy, A. Hendy | Enterer: | M. Sommers, A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 1999-06-10 17:12:21 | Last modified: | 2006-09-08 17:41:14 |
Access level: | the public | Released: | 1999-06-10 17:12:21 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
51. | 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] |
Secondary references:
18606 | R. L. Squires and L. R. Saul. 2004. Uncommon Cretaceous naticiform gastropods from the Pacific Slope of North America. The Velliger 47(1-2):21-37 [A. Miller/A. Hendy] |