IGM Loc. 3681 - Coatzacoalcos [Agueguexquite Fm] (Pliocene of Mexico)

Where: Veracruz, Mexico (18.1° N, 94.4° W: paleocoordinates 18.2° N, 93.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Agueguexquite Formation, Late/Upper Pliocene (3.6 - 2.6 Ma)

• STRATIGRAPHIC RELATIONS: From the Agueguexquite Formation, for which lithostratigraphic relationships are not stated in english. Overlies the Upper Conception and Filisola Fms (Early-Late Pliocene) according to Collins and Coates (1999, p. 75), and is equivalent to the Tirabuzon Fm of Mexico's Maria Madre Island, and Esmeraldas of NW Ecuador. AGE: Stated to be Pliocene. Assigned here, provisionally, to the late Pliocene age (following PBDB# 59420: "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. Late Pliocene according to Collins and Coates (1999, p. 75)". STRATIGRAPHIC POSITION: From unknown position in formation.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; unlithified siliciclastic sediments

• SPECIFIC LITHOLOGY: Assumed to be siliciclastic based on other collections. LITHIFICATION: Assumed unlithified, on the basis of preservation of figured specimens.

Size classes: macrofossils, mesofossils

Collection methods: bulk, surface (in situ), sieve,

• COLLECTOR: Not stated. REPOSITORY: IGM, Mexico.

Primary reference: M. C. Perrilliat and P. Flores-Guerrero. 2011. Moluscos de la Formación Agueguexquite (Plioceno inferior) de Coatzacoalcos, Veracruz, México. Revista Mexicana de Ciencias Geológicas 28(3):379-397 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 134769: authorized by Austin Hendy, entered by Austin Hendy on 16.10.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for molluscs. NOMENCLATURE: Authoritative publication, with modern nomenclature, and consistent use of subgenera and species-level assignments.
Bivalvia
 Arcida - Arcidae
"Barbatia (Acar) domingensis" = Acar domingensis, Barbatia (Barbatia) mauryae
"Barbatia (Acar) domingensis" = Acar domingensis Lamarck 1819 miniature ark
Barbatia (Barbatia) mauryae Olsson 1922 clam
 Carditida - Crassatellidae
 Pholadida - Corbulidae
"Corbula (Varicorbula) heterogena" = Varicorbula disparilis d'Orbigny 1853 clam
 Cardiida - Veneridae
Ventricolaria harrisiana Olsson 1922 venus clam
"Gouldia insulare" = Gouldia insularis Dall and Simpson 1901 venus clam
 Cardiida - Tellinidae
"Tellina (Eurytellina) browni" = Eurytellina
"Tellina (Eurytellina) browni" = Eurytellina tellin clam
 Cardiida - Cardiidae
"Laevicardium (Laevicardium) laevigatum" = Laevicardium serratum
"Laevicardium (Laevicardium) laevigatum" = Laevicardium serratum Linnaeus 1758 cockle
 Nuculida - Nuculidae
Nucula (Nucula) tenuisculpta Gabb 1873 nut clam
Gastropoda
 Ptenoglossa - Epitoniidae
 Opisthobranchia - Retusidae
Sulcoretusa sulcata d'Orbigny 1841 snail
 Opisthobranchia - Cylichnidae
Acteocina lepta Woodring 1928 barrel-bubble
Acteocina cf. candei d'Orbigny 1841 barrel-bubble
 Triphoroidea - Triphoridae
Triphora hemphilli Bartsch 1907 snail
 Triphoroidea - Cerithiopsidae
Cerithiopsis vinca Olsson and Harbison 1953 snail
 Neogastropoda - Olividae
Oliva (Strephonella) sp. Dall 1909 olive snail
 Neogastropoda - Columbellidae
"Zanassarina wadei" = Nassarina (Zanassarina), Mitrella asema
"Zanassarina wadei" = Nassarina (Zanassarina) snail
 Neogastropoda - Buccinidae
Hanetia dalli Brown and Pilsbry 1911 true whelk
 Neogastropoda - Cystiscidae
Persicula (Gibberula) glandula Weisbord 1962 snail
 Neogastropoda - Marginellidae
"Marginella (Eratoidea) minor" = Volvarina taeniata
"Marginella (Eratoidea) minor" = Volvarina taeniata Sowerby 1846 margin shell
 Neogastropoda - Muricidae
Coralliophila miocenica Guppy 1874 murex snail
 Neogastropoda - Mangeliidae
 Neogastropoda - Drilliidae
 Neogastropoda - Borsoniidae
 Neogastropoda - Conidae
Conus almagrensis Böse 1910 cone shell
 Neogastropoda - Terebridae
 Vanikoroidea - Eulimidae
 Velutinoidea - Triviidae
"Erato maugeriae" = Hespererato maugeriae
"Erato maugeriae" = Hespererato maugeriae Gray 1832 snail
 Naticoidea - Naticidae
Natica sp., "Natica (Naticarius) canrena" = Naticarius canrena
Natica sp. Scopoli 1777 moon snail
"Natica (Naticarius) canrena" = Naticarius canrena Linnaeus 1758 moon snail
 Rissooidea - Rissoidae
Rissoina (Phosinella) sagraiana d'Orbigny 1842 snail
Schwartziella catesbyana d'Orbigny 1842 snail
 Rissooidea - Vitrinellidae
Cyclostremiscus bartschi Mansfield 1930 snail
 Truncatelloidea - Caecidae
Caecum sp. Fleming 1813 snail
Caecum cycloferum Folin 1867 snail
Caecum (Caecum) regulare Carpenter 1858 snail
Caecum mexicanum Collins 1937 snail
Meioceras constrictum Gabb 1873 snail
 Sorbeoconcha - Cerithiidae
Bittium alternatum cerith snail
Alabina asperoides cerith snail
 Pyramidelloidea - Pyramidellidae
"Turbonilla (Chemnitzia) atlasi" = Chemnitzia, Turbonilla beatula, Turbonilla sp.
"Turbonilla (Chemnitzia) atlasi" = Chemnitzia snail
Turbonilla sp. Risso 1826 snail
 Architectonicoidea - Architectonicidae
 Trochoidea - Trochidae
Calliostoma sp. Swainson 1840 top snail
 Trochoidea - Liotiidae
Liotia woodringi Perrilliat 1972 snail
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Dentalium rimosum Bose 1906 tusk shell