IGM-2448, Temalac: Early/Lower Maastrichtian, Mexico

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Heterostropha - Urocoptidae
Holospira sp. Martens 1860
Holospira sp.
Gastropoda - Heterostropha - Architectonicidae
Granosolarium coffea (Sohl 1964)
Granosolarium coffea Sohl
Gastropoda - Heterostropha - Ringiculidae
Ringicula (Ringicula) cf. clarki Durham 1944
recombined as Ringicula (Ringiculina) clarki
Ringicula (Ringicula) cf. R. (R.) clarki Gardner
Gastropoda - Eucyclidae
Calliomphalus (Planolateralus) argenteus
Calliomphalus (Planolateralus) argenteus Wade
Calliomphalus (Planolateralus) mexcalensis
Calliomphalus (Planolateralus) mexcalensis Perrilliat et al.
Calliomphalus (Planolateralus) sp. Cossmann 1888
Calliomphalus (Planolateralus) sp.
Calliomphalus (Planolateralus) cf. decoris (Sohl 1960)
Calliomphalus (Planolateralus) cf. C. (P.) decoris Sohl
Gastropoda - Nododelphinulidae
Nododelphinula diminuta
Nododelphinula diminuta Perrilliat et al.
Gastropoda - Opisthobranchia - Cylichnidae
Cylichna secalina Shumard 1861
Cylichna secalina Shumard
Gastropoda - Neritidae
Nerita cf. divaricata
Nerita cf. N. divaricata Orbigny
Gastropoda - Turritellidae
Turritella cf. chalybeatensis
Turritella cf. T. chalybeatensis Sohl
Haustator trilira (Conrad 1860)
original and current combination Turritella trilira
Turritella trilira Conrad
Turritella vertebroides Morton 1834
Turritella vertebroides Morton
Gastropoda - Pachychilidae
Pyrazus pyramidatus (Deshayes 1833)
synonym of Jponsia geslini
Pyrazus pyramidatus Deshayes
Gastropoda - Potamididae
Potamides temalacensis
Potamides temalacensis Perrilliat et al.
Ptychopotamides ancestralus
original and current combination Potamides (Ptychopotamides)
Ptychopotamides ancestralus Perrilliat et al.
Gastropoda - Ampullinidae
Pseudamaura cf. lepta Sohl 1964
Pseudamaura cf. P. lepta Sohl
Gastropoda - Epitoniidae
Epitonium cf. faearium Dockery 1993
Epitonium cf. E. faearium Dockery
Opalia (Opalia) informal sp. A Adams and Adams 1858
Opalia (Opalia) sp. A Perrilliat et al. 2000
Opalia (Opalia) informal sp. B Adams and Adams 1858
Opalia (Opalia) sp. B Perrilliat et al. 2000
Striaticostatum cf. bexarense (Stephenson 1941)
Striaticostatum cf. S. bexarense Stephenson
Belliscala sp. Stephenson 1941
Belliscala sp.
Gastropoda - Naticidae
Gyrodes (Gyrodes) major Wade 1926
Gyrodes (Gyrodes) major Wade
Gyrodes (Gyrodes) supraplicatus Conrad 1858
Gyrodes (Gyrodes) supraplicatus (Conrad)
Euspira rectilabrum (Conrad 1858)
Euspira rectilabrum Conrad
Amaurellina guerrera
Amaurellina guerrera Perrilliat et al.
Gastropoda - Triforidae
Cerithiella aequalirata Dockery 1993
Cerithiella aequalirata Dockery
Cerithiella nodoliratum Wade 1926
Cerithiella nodoliratum Wade
Gastropoda - Neogastropoda - Fasciolariidae
Remera sp. Stephenson 1941
Remera sp.
Drilluta gloriae
Drilluta gloriae Perrilliat et al.
Bellifusus curvicostatus Wade 1926
Bellifusus curvicostatus curvicostatus (Wade)
? Paleopsephaea sp. Wade 1926
Paleopsephaea? sp.
Paleopsephaea mutabilis Wade 1926
Paleopsephaea mutabilis Wade
Gastropoda - Neogastropoda - Pyropsidae
Pyropsis lanhami Stephenson 1941
Pyropsis lanhami Stephenson
Gastropoda - Neogastropoda - Volutidae
Volutomorpha cf. retifera Dall 1907
Volutomorpha cf V. retifera Dall
Gastropoda - Aporrhaidae
Pugnellus (Pugnellus) densatus
Pugnellus (Pugnellus) densatus Conrad
Gastropoda - Rostellariidae
? Calyptraphorus sp. Conrad 1857
Calyptraphorus? sp.
Bivalvia - Nuculanida - Nuculanidae
Nuculana corsicana
Nuculana corsicana Stephenson
Bivalvia - Nuculida - Nuculidae
Nucula ciboloensis
Nucula ciboloensis Stephenson
Bivalvia - Pectinida - Neitheidae
Neithea (Neithea) cf. youngi
Neithea (Neithea) cf. N. (N.) youngi Myers
Bivalvia - Pectinida - Plicatulidae
Plicatula batnensis Coquand 1880
synonym of Plicatula (Plicatula) ferryi
Plicatula batnensis Coquand
Bivalvia - Cardiida - Cardiidae
Cardium sp. Linnaeus 1758
Cardium sp.
? Protocardia sp. (Beyrich 1845)
Protocardia? sp.
Bivalvia - Cardiida - Arcticidae
Veniella cf. jamaicensis
Veniella cf. V. jamaicensis (Trechmann)
Veniella sp. Stoliczka 1870
Veniella sp.
Bivalvia - Pholadida - Corbulidae
Caestocorbula crassiplica (Gabb 1860)
Corbula crassiplica Gabb
Corbula cf. paracrassa Wade 1926
Corbula cf. C. paracrassa Wade
Bivalvia - Carditida - Astartidae
Astarte similis Munster 1840
Astarte similis Muenster
Malacostraca - Decapoda - Longusorbiidae
Longusorbis quadratus n. sp. Fraaije et al. 2006
Fraaije et al. 2006
Malacostraca - Decapoda - Retroplumidae
Costacopluma bishopi n. sp. Vega and Feldmann 1992
Fraaije et al. 2006
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:based on nearby landmark
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:Early/Lower Maastrichtian
Age range of interval:72.10000 - 66.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Mexcala
Stratigraphic resolution:group of beds
Stratigraphy comments: Fraaije et al. (2006) argued for a Coniacian age on the basis of regional biostratigraphy in Lang & Frerichs (1998), which identified species indicating the Dicarinella concavata biozone in the lower part of the Mexcala Formation. Fraaije et al. (2006) argued that IGM-2448 was at the base of the Mexcala Formation, just above the Turonian Morelos Formation. However, Perrilliat et al. (2000) reported planktic foraminiferans from locality IGM-2448 itself, including Gansserina gansseri, Rosita fornicata, Globotruncana ventricosa, G. linneiana, Rugoglobigerina rugosa, Hedbergella monmouthensis, and Heterohelix globulosa, indicative of an early Maastrichtian age (Brian Huber, pers. comm.).
Lithology and environment
Primary lithology: lithified siltstone
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:7461
Authorizer:M. Kosnik, M. Clapham Enterer:M. Kosnik, M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2000-07-18 12:00:01 Last modified:2021-07-26 23:05:35
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:

40983decapod R. H. B. Fraaije, F. J. Vega, B. W. M. Bakel and L. M. Garibay-Romero. 2006. Late Cretaceous dwarf decapods from Guerrero, southern Mexico and their migration patterns. Contributions to Zoology 75(3/4):121-132 [C. Schweitzer/E. Johnson/E. Johnson]