Tanapag Limestone (Pleistocene of Northern Mariana Islands)

Where: Northern Mariana Islands (15.0° N, 145.6° E: paleocoordinates 15.0° N, 146.3° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Tanapag Limestone Formation, Late/Upper Pleistocene (0.1 - 0.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Tanapag Lmst, which overlies the regional equivalent of the Mariana Lmst, and is overlain by the raised beach deposits. AGE: Late Pleistocene-Holocene on the basis of stratigraphic position. STRATIGRAPHIC POSITION: From unknown position within Tanapag Lmst.

• group of beds-level stratigraphic resolution

Environment/lithology: poorly lithified limestone

• ENVIRONMENT: Shallow carbonate facies.
• SPECIFIC LITHOLOGY: Limestone facies. LITHIFICATION: Poorly lithified, on the basis of figured specimens.

Size class: macrofossils

Reposited in the USNM

Collection methods: surface (in situ),

• COLLECTORS: Multiple collectors, including Cloud, Schmidt, and Burke (1948-1949, 1953), and Ladd (1958). REPOSITORY: USNM (formely USGS collections).

Primary reference: H. S. Ladd. 1966. Chitons and Gastropods (Haliotidae through Adeorbidae) from Western Pacific Islands. United States Geological Survey Professional Paper 531:1-98 [A. Hendy/A. Hendy/J. Millet]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 77941: authorized by Austin Hendy, entered by Austin Hendy on 23.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not quite exhaustive, but comprehensive for gastropods. Bivalves not covered in publications. NOMENCLATURE: Authoritative publication, with moderately modern nomenclature, with subgenus and species-resolution assignments.
Gastropoda
 Trochoidea - Turbinidae
 Trochoidea - Trochidae
"Tectus (Tectus) pyramis" = Tectus pyramis, "Trochus (Trochus) maculatus" = Trochus maculatus
"Tectus (Tectus) pyramis" = Tectus pyramis Born 1778 top snail
"Trochus (Trochus) maculatus" = Trochus maculatus Linnaeus 1758 top snail
 Cerithioidea - Cerithiidae
Rhinoclavis (Rhinoclavis) articulata1 Adams 1850 cerith snail
Rhinoclavis (Rhinoclavis) aspera1 Linnaeus 1758 cerith snail
 Sorbeoconcha - Campanilidae
"Cerithium (Thericium) alveolus" = Thericium1
"Cerithium (Thericium) alveolus" = Thericium1 snail
 Sorbeoconcha - Strombidae
 Neogastropoda - Mitridae
Pterygia crenulata2 mitre shell
 Neogastropoda - Terebridae
Terebra (Oxymeris) maculata3 Linnaeus 1758 auger snail
Terebra (Decorihastula) affinis3 Gray 1834 auger snail
"Terebra (Oxymeris) argus" = Subula (Oxymeris)3 auger snail
 Sorbeoconcha - Cypraeidae
"Cypraea (Pustilaria) childreni" = Ipsa childreni2, Cypraea (Lyncina) lynx2
"Cypraea (Pustilaria) childreni" = Ipsa childreni2 Gray 1825 cowry
Cypraea (Lyncina) lynx2 Linnaeus 1758 cowry
 Sorbeoconcha - Naticidae
Mammilla melanostoma2 Gmelin 1791 moon snail