Talisay Member, Alifian Limestone (Miocene of Guam)

Where: Guam (13.5° N, 144.8° E: paleocoordinates 13.4° N, 146.2° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Talisay Member (Alifian Limestone Formation), Late/Upper Miocene (11.6 - 5.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Talisay Mbr of the Alifian Limestone, which overlies the Barrigada Limestone (Late Miocene) and is overlain by the Mariana Limestone. Equivalent to the Janum Formation. AGE: Late Miocene on the basis of foraminiferal biostratigraphy. STRATIGRAPHIC POSITION: Composite list of undifferentiated Talisay Mbr localities.

• member-level stratigraphic resolution

Environment/lithology: lithified limestone

• ENVIRONMENT: Shallow subtidal carbonate facies.
• SPECIFIC LITHOLOGY: Limestone facies. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Preservation: cast, mold/impression

Reposited in the USNM

Collection methods: surface (in situ),

• COLLECTORS: Unknown collectors. 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 77939: 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
 Neogastropoda - Olividae
Oliva annulata2 olive snail
 Neogastropoda - Columbellidae
 Neogastropoda - Fasciolariidae
Latirus barclayi2 Reeve 1847 snail
 Neogastropoda - Mitridae
 Neogastropoda - Harpidae
 Neogastropoda - Conidae
Conus cf. tessulatus3 Born 1778 cone shell
 Stromboidea - Strombidae
"Strombus (Lentigo) cf. preoccupatus" = Persististrombus preoccupatus1, Strombus (Tricornis) "sp. A"1
"Strombus (Lentigo) cf. preoccupatus" = Persististrombus preoccupatus1 Finlay 1927 true conch
Strombus (Tricornis) "sp. A"1 Jousseaume 1886 conch
 Naticoidea - Naticidae
Sinum "sp. A"2 Röding 1798 moon snail
 Cypraeoidea - Cypraeidae
"Cypraea (Cypraea) cf. tigris" = Cypraea tigris2, "Cypraea (Pustilaria) childreni" = Ipsa childreni2
"Cypraea (Cypraea) cf. tigris" = Cypraea tigris2 Linnaeus 1758 cowry
"Cypraea (Pustilaria) childreni" = Ipsa childreni2 Gray 1825 cowry
 Tonnoidea - Cassidae
Phalium (Casmaria) sp.2 Link 1807 snail
 Sorbeoconcha - Potamididae
Potamides wardi1 horn snail
 Sorbeoconcha - Turritellidae
 Haliotoidea - Haliotidae
 Turbinoidea - Turbinidae
"Angaria delphinus" = Delphinula delphinus Linnaeus 1758 laciniated dolphin shell
Turbo (Turbo) petholatus Linnaeus 1758 snail
 Trochoidea - Trochidae
"Trochus (Trochus) maculatus" = Trochus maculatus, Stomatia cf. phymotis
"Trochus (Trochus) maculatus" = Trochus maculatus Linnaeus 1758 top snail
Stomatia cf. phymotis Helbling 1779 top snail