Cuenca Salina del Istmo del Tehuantepec [Agueguexquite Fm]: Late/Upper Pliocene, Mexico

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Arcida - Arcidae
Anadara (Anadara) arata
Anadara (Anadara) woodringi Perrilliat 1960
Anadara (Anadara) istmica Perrilliat 1960
synonym of Anadara (Rasia) actinophora
Anadara (Anadara) lienosa (Say 1832)
recombined as Anadara (Rasia) lienosa
Bivalvia - Pectinida - Pectinidae
Pecten (Euvola) bowdenensis Dall 1898
recombined as Euvola bowdenensis
Amusium (Amusium) sp. (Röding 1798)
Bivalvia - Cardiida - Cardiidae
Trigoniocardia (Americardia) media (Linnaeaus 1758)
recombined as Americardia media
Gastropoda - Neogastropoda - Olividae
Oliva (Oliva) plicata (Guppy 1896)
    = Oliva (Oliva) cristobalcoloni Maury 1917
Woodring 1964
original and current combination Oliva cristobalcoloni
Gastropoda - Neogastropoda - Fasciolariidae
Fasciolaria semistriata Sowerby 1850
Gastropoda - Neogastropoda - Mitridae
Mitra (Tiara) rhadina Woodring 1928
recombined as Subcancilla rhadina
Gastropoda - Neogastropoda - Muricidae
Murex (Murex) recurvirostris (Broderip 1832)
recombined as Vokesimurex recurvirostris
Gastropoda - Neogastropoda - Harpidae
Harpa americana Pilsbry 1922
    = Harpa isthmica Vokes 1984
Vokes 1984
Gastropoda - Neogastropoda - Cochlespiridae
Ancistrosyrinx miranda (Guppy 1882)
recombined as Cochlespira (Ancistrosyrinx) miranda
Gastropoda - Neogastropoda - Drilliidae
Crassispira alesidota (Dall 1889)
Subspecies: Crassispira alesidota magna
Gastropoda - Neogastropoda - Turridae
Scobinella morierei (Cossmann 1913)
Polystira barretti (Guppy 1866)
Gastropoda - Neogastropoda - Conidae
Conus (Leptoconus) turbinopsis Gardner 1937
    = Conus multiliratus Olsson 1922
Hoerle 1976
recombined as Conasprelloides multiliratus
Conus (Leptoconus) burckhardti (Bose 1906)
original and current combination Conus burckhardti
Conus (Leptoconus) consobrinus (Sowerby 1850)
original and current combination Conus consobrinus
Gastropoda - Neogastropoda - Terebridae
Terebra (Paraterebra) isaacpetiti (Maury 1925)
recombined as Terebra (Oreoterebra) isaacpetiti
Gastropoda - Naticidae
Natica (Naticarius) canrena (Linnaeus 1758)
recombined as Naticarius canrena
Subspecies: N. (Naticarius) canrena antinacca
Gastropoda - Personidae
Personella floridana (Olsson and McGinty 1951)
    = Distorsio clathrata Lamarck 1816
Landau and Marques da Silva 2010
Gastropoda - Architectonicidae
Architectonica (Architectonica) nobilis (Röding 1798)
original and current combination Architectonica nobilis
Subspecies: A. (A.) nobilis quadriseriata
Gastropoda - Trochidae
Calliostoma (Leiotrochus) limonensis Olsson 1922
see common names

Country:Mexico State/province:Veracruz
Coordinates: 18.1° North, 94.3° West (view map)
Paleocoordinates:18.2° North, 93.8° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Period:Neogene Epoch:Pliocene
Stage:Piacenzian 10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Pliocene
Age range of interval:3.60000 - 2.58800 m.y. ago
Stratigraphic resolution:bed
Stratigraphy comments: The geological age according to Perilliat (1960) is upper Lower Miocene or lower Middle Miocene (Helvetian or Tortonian). The fauna is apparently closely connected with that from the Choctawhatchee Fm in Florida....The Agueguexquite Fm represents the youngest Miocene deposition as yet found in the Coatzacoalcos Basin and can approximately can be correlated with the Mid-upper Gatun Fm in Panama or with basal Bowden Fm of Jamaica (Thalmann 1935). More recent descriptions of fauna from the Agueguexquite Fm assign it to the Pliocene, more specifically the middle Pliocene (N20). This also matches revised ages for the Bowden Fm, although the Gatun spans the Late Miocene and Early Pliocene.
Lithology and environment
Primary lithology:micaceous,shelly/skeletal,gray,blue unlithified sandy,carbonaceous claystone
Includes fossils?Y
Lithology description: The sediments consist principally of bluish grey sandy clays, mostly micaceous, with intercalations of grit and sand, poorly bedded, containing a rich fauna of gastropoda and lamellibrancha, and scatterd plant remains. The very base of the unit has layers of quartz pebbles, from hazelnut to walnut in size. No lithification data is reported, however all figured specimens show now evidence of lithified matrix and therefore this collection is assigned as unlithified.
Environment:coastal indet.
Glacial or sequence phase:transgressive
Geology comments: Accumulated during a marine transgression as evidence by basal pebble lag. Deposited in shallow warm water within the neritic zone.
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Database number:59420
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2006-04-02 14:57:28 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2008-04-02 14:57:28
Creative Commons license:CC BY
Reference information

Primary reference:

17059. M.C. Perrilliat. 1960. Moluscos del Mioceno de la Cuenca Salina del Istmo de Tehuantepec, Mexico. Paleontologia Mexicana 8:1-31 [A. Miller/A. Hendy/A. Hendy]

Secondary references:

31308 S. E. Hoerle. 1976. The genus Conus (Mollusca: Gastropoda) from the Alum Bluff Group of northwestern Florida. Tulane Studies in Geology and Paleontology 12(1):1-31 [A. Hendy/A. Hendy]
36423 B. Landau and C. Marques da Silva. 2010. Early Pliocene gastropods of Cubagua, Venezuela: Taxonomy, palaeobiogeography and ecostratigraphy. Palaeontos 19:1-221 [A. Hendy/A. Hendy]
31294 E. H. Vokes. 1984. The genus Harpa (Mollusca: Gastropoda) in the new world. Tulane Studies in Geology and Paleontology 18(1-2):53-60 [A. Hendy/A. Hendy]
13232 W. P. Woodring. 1964. Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (gastropods: Columbellidae to Volutidae). United States Geological Survey Professional Paper 306(C):241-297 [A. Miller/A. Hendy/A. Hendy]