USGS 8302 (Miocene of Trinidad and Tobago)

Where: Trinidad and Tobago (10.4° N, 61.3° W: paleocoordinates 10.1° N, 58.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Middle Miocene (16.0 - 11.6 Ma)

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

• bed-level stratigraphic resolution

Environment/lithology: marine; unlithified siliciclastic sediments

• SPECIFIC LITHOLOGY: Unknown, presumably siliciclastic. LITHIFICATION: Assumed to be unlithified based figured specimes (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 74920: 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
 Ptenoglossa - Epitoniidae
Epitonium sp. Bolten 1798 wentletrap
poorly preserved; juvenile
Acrilla sp. Adams and Adams 1860 wentletrap
poorly preserved; fragment
 Neogastropoda - Olividae
Olivella sp. Swainson 1831 olive snail
poorly preserved; juvenile
 Neogastropoda - Columbellidae
Strombina sp., "Strombina walli n. sp." = Sincola (Sincola) walli
Strombina sp. Mörch 1852 snail
poorly preserved; juvenile
"Strombina walli n. sp." = Sincola (Sincola) walli Mansfield 1925 snail
 Neogastropoda - Nassariidae
"Alectrion brassiensis n. sp." = Nassarius (Alectrion)
"Alectrion brassiensis n. sp." = Nassarius (Alectrion) snail
 Neogastropoda - Cystiscidae
"Marginella (Closia) nitrina n. sp." = Granulina nitrina
"Marginella (Closia) nitrina n. sp." = Granulina nitrina Mansfield 1925 snail
 Neogastropoda - Marginellidae
Marginella (Faba) brassoensis n. sp. Mansfield 1925 margin shell
Marginella solitaria Guppy 1896 margin shell
SUBSPECIES: M. solitaria montserratensis
Marginella (Faba) bulbrooki n. sp. Mansfield 1925 margin shell
 Neogastropoda - Muricidae
Typhis sp. Montfort 1810 murex snail
poorly preserved, fragment
 Neogastropoda - Drilliidae
"Drillia inadrina n. sp." = Syntomodrillia inadrina, Drillia inniadda n. sp., Drillia pennyi n. sp., Drillia tridadina n. sp.
"Drillia inadrina n. sp." = Syntomodrillia inadrina Mansfield 1925 snail
Drillia inniadda n. sp. Mansfield 1925 snail
Drillia pennyi n. sp. Mansfield 1925 snail
Drillia tridadina n. sp. Mansfield 1925 snail
 Neogastropoda - Turridae
"Turris brassoensis n. sp." = Gemmula machapoorensis
"Turris brassoensis n. sp." = Gemmula machapoorensis Maury 1925 turrid
 Neogastropoda -
Glyphostoma addina n. sp., "Glyphostoma amicta" = Nannodiella amicta
Glyphostoma addina n. sp. snail
"Glyphostoma amicta" = Nannodiella amicta Guppy 1896 snail
SUBSPECIES: G. amicta rintriada n. subsp.
 Neogastropoda - Borsoniidae
Microdrillia propetrina n. sp. Mansfield 1925 snail
 Vanikoroidea - Eulimidae
Melanella sp. Bowdich 1822 snail
poorly preserved
 Naticoidea - Naticidae
"Natica canrena" = Naticarius canrena
"Natica canrena" = Naticarius canrena Linnaeus 1758 moon snail
 Truncatelloidea - Caecidae
Caecum properegulare n. sp. Mansfield 1925 snail
 Sorbeoconcha - Turritellidae
"Turritella altilira" = Turritella (Bactrospira) altilira Conrad 1857 turret shell
SUBSPECIES: T. altilira chiriquensis
Turritella (Broderiptella) caronensis Mansfield 1925 turret shell
SUBSPECIES: T. gatunensis caronensis n. subsp.
 Pyramidelloidea - Pyramidellidae
Pyramidella sp. Lamarck 1799 snail
poorly preserved; several spp.
Turbonilla sp. Risso 1826 snail
poorly preserved; several spp.
Odostomia sp. Fleming 1817 snail
poorly preserved
 Architectonicoidea - Architectonicidae
Architectonica sp. Röding 1798 sundial
poorly preserved; juvenile
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium cossmannianum Pilsbry and Sharp 1897 tusk shell
 Gadilida - Gadilidae
Cadulus caronensis n. sp. Mansfield 1925 tusk shell