USGS 8301 (Miocene of Trinidad and Tobago)

Where: Trinidad and Tobago (10.5° N, 61.2° W: paleocoordinates 9.9° N, 57.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From unknown lithostratigraphic unit. THICKNESS: Unknown AGE: Stated to be "Lower Miocene" in text, but potentially could be younger in more recent revisions; an Early Miocene age is presently assigned. STRATIGRAPHIC POSITION: Unknown.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified siliciclastic sediments

• SPECIFIC LITHOLOGY: Unknown, presumably siliciclastic. LITHIFICATION: Assumed to be poorly-lithified based figured specimes (largely free of sediment).

Size class: macrofossils

Collected by Penny, Bullbrook; reposited in the USNM

• COLLECTORS: F. W. Penny and J. A. Bullbrook (unknown date, but presumably during the 1910's-early 1920's). REPOSITORY: USNM.

Primary reference: W. C. Mansfield. 1925. Miocene gastropods and scaphopods from Trinidad, British West Indies. Proceedings of the United States National Museum 66(22):9116-9125 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 74925: authorized by Austin Hendy, entered by Austin Hendy on 05.09.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and scaphopoda. Bivalvia not listed, but presumably present. NOMENCLATURE: Authoritative publication with subgenus and species assignments, but with antiquated nomenclature reflecting present usage.
Gastropoda
 Neogastropoda - Olividae
Ancilla sp. Lamarck 1799 olive snail
poorly preserved
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
poorly preserved
 Naticoidea - Naticidae
Natica sp. Scopoli 1777 moon snail
poorly preserved
Sinum sp. Röding 1798 moon snail
poorly preserved
Eunaticina sp. Fischer 1885 moon snail
poorly preserved
 Vermetoidea - Vermetidae
Serpulorbis sp. Sasso 1827 worm shell
poorly preserved
 Sorbeoconcha - Turritellidae
Turritella machapoorensis Maury 1925 turret shell
Turritella caparonis Maury 1925 turret shell
"Turritella aff. perattenuata" = Turritella (Bactrospira) perattenuata Heilprin 1886 turret shell
 Sorbeoconcha - Cerithiidae
Cerithium sp., "Clava sp." = Rhinoclavis
Cerithium sp. Bruguière 1789 cerith snail
poorly preserved
"Clava sp." = Rhinoclavis Swainson 1840 cerith snail
poorly preserved
 Sorbeoconcha - Modulidae
Modulus tamanensis n. sp. Maury 1925 snail
 Trochoidea - Liotiidae
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
poorly preserved