IGM 2940, N. of Temalac: Late/Upper Maastrichtian, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Hedbergellidae
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Hedbergella monmouthensis
(Olsson 1960)
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Perrilliat and Vega 2001 | |||||||||
Heterohelicidae
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Heterohelix globulosa
(Ehrenberg 1840)
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Perrilliat and Vega 2001 | |||||||||
Globotruncanidae
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Gansserina gansseri
(Bolli 1951)
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Perrilliat and Vega 2001 | |||||||||
Rugoglobigerina rugosa
(Plummer 1927)
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Perrilliat and Vega 2001 | |||||||||
Globotruncana ventricosa
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Perrilliat and Vega 2001 | |||||||||
Globotruncana linneiana
(d'Orbigny 1839)
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Perrilliat and Vega 2001 | |||||||||
Rosita fornicata
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Perrilliat and Vega 2001 | |||||||||
Gastropoda
- Neogastropoda
- Fasciolariidae
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Drilluta gloriae
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Drilluta gloriae Perrilliat et al. | ||||||||||
Gastropoda
- Neogastropoda
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Mexfusus rotundicostatus n. gen., n. sp.
Vermeij et al. 2004
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Vermeij et al. 2004 | |||||||||
Gastropoda
- Xenophoridae
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Acanthoxenophora sinuosa n. gen., n. sp.
Perrilliat and Vega 2001
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Perrilliat and Vega 2001 | |||||||||
Bivalvia
- Pectinida
- Pectinidae
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Camptonectes sp.
Meek 1864
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Camptonectes sp. | ||||||||||
Bivalvia
- Mytilida
- Crenellidae
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Crenella serica
Conrad 1860
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Crenella serica Conrad | ||||||||||
Bivalvia
- Nuculida
- Nuculidae
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Nucula ciboloensis
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Nucula ciboloensis Stephenson | ||||||||||
see common names |
Geography
Country: | Mexico | State/province: | Guerrero |
Coordinates: | 18.2° North, 98.9° West (view map) | ||
Paleocoordinates: | 24.2° North, 80.8° West | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
*Period: | Late/Upper Cretaceous | *Epoch: | Senonian |
*International age/stage: | Early/Lower Maastrichtian | ||
Key time interval: | Late/Upper Maastrichtian | ||
Age range of interval: | 70.60000 - 66.00000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Mexcala | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: Was scored as Early Maastrichtian. However: “An upper Maastrichtian age for the beds that contain the specimens here described was inferred based upon the presence of the following index species of foraminifera: Gansserina gansseri (Bolli). Rosita fomicata (Plummer), Globotruncana ventricosa (White). G. linn eiana (d'Orbigny), Rugoglobigerina rugosa (Plummer), Hedbergella monmouthensis (Olsson). and Heterohelix globulosa (Ehrenberg). These species were identified by Brian Huber (personal communication)." |
Lithology and environment
Primary lithology: | brown marl |
Secondary lithology: | fine calcareous sandstone |
Environment: | marine indet. |
Geology comments: The assemblage of invertebrate fauna is interpreted as shallow marine, possibly associated with a deltaic system. However, the abundance of planktic foraminifera and the broken delicate structures of the gastropod shells (aperture and spines), suggest that the material was reworked into a deeper environment, contemporaneously with the deposition of the planktic foraminifera. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Spatial resolution: | allochthonous |
Collection methods and comments
Reason for describing collection: | taxonomic analysis |
Collection method comments: Repository: IGM (Museo Paleontologia del Instituto Geologia, Universidad Nacional Autonoma de Mexico) | |
Taxonomic list comments:The fauna is now known to include planktic and benthic foraminifera; solitary, shallow-water hermatypic corals; gastropods; bivalves, scaphopods; reworked ammonoids and nautiloids; crabs; spatangoid echinoids; marine vertebrate remains; and palynomorphs. Previous paleontologic work on this fauna includes a species of retroplumid crab (Vega & Feldmann, 1992), as we ll as preliminary reports on the mollusks (Salccda ct al., 1995; Vega & Perrilliat, 1995; Perrilliat & Vega, 1996); and echinoids (Sanchez-Rodriguez et al., 1995; Sanchez-Rodriguez, 1997). |
Metadata
Database number: | 7463 | ||
Authorizer: | M. Kosnik, P. Wagner, M. Clapham | Enterer: | M. Kosnik, P. Wagner, B. Santos |
Modifier: | B. Santos | Research group: | marine invertebrate |
Created: | 2000-07-18 12:00:01 | Last modified: | 2019-10-18 11:41:29 |
Access level: | the public | Released: | 2000-07-18 12:00:01 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
489. | M. C. Perrilliat, F.J. Vega, and R. Corona. 2000. Early Maastrictian mollusca from the Mexcala formation of the state of Guerro, southern Mexico. Journal of Paleontology 74(1):7-24 [M. Kosnik/M. Kosnik/J. Alroy] |
Secondary references:
58995 | M. C. Perrilliat and F. J. Vega. 2001. A new genus and species of Late Cretaceous xenophorid gastropod from southern Mexico. The Veliger 44(1):73-78 [P. Wagner/P. Wagner] | |
70509 | G. J. Vermeij, G. S. Herbert, F. J. Vega and M. C. Perrilliat. 2004. Mexfusus rotundicostatus, a New Genus and Species of Neogastropod from the Late Cretaceous of Southern Mexico. Journal of Paleontology 78(6):1123-1127 [M. Clapham/B. Santos] |