USGS 9212 (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 74921: 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.
Malacostraca
 Decapoda - Portunidae
Callinectes sp. Stimpson 1860 swimming crab
poorly preserved
Gastropoda
 Neogastropoda - Olividae
Ancilla paralamellata n. sp. Mansfield 1925 olive snail
Olivella sp. Swainson 1831 olive snail
poorly preserved; 2 species
 Neogastropoda - Columbellidae
Strombina sp., "Strombina walli n. sp." = Sincola (Sincola) walli, Metulella caronensis n. sp.
Strombina sp. Mörch 1852 snail
poorly preserved, fragment
"Strombina walli n. sp." = Sincola (Sincola) walli Mansfield 1925 snail
Metulella caronensis n. sp. Mansfield 1925 snail
 Neogastropoda - Buccinidae
Phos trinitatensis n. sp. Mansfield 1925 true whelk
 Neogastropoda - Nassariidae
"Alectrion brassiensis n. sp." = Nassarius (Alectrion)
"Alectrion brassiensis n. sp." = Nassarius (Alectrion) snail
 Neogastropoda - Cystiscidae
Marginella (Gibberula) trinitatensis n. sp. Mansfield 1925 snail
 Neogastropoda - Mitridae
Mitra sp. Lamarck 1798 mitre shell
poorly preserved; juvenile
 Neogastropoda - Marginellidae
Marginella guaica Maury 1925 margin shell
Marginella (Faba) bulbrooki n. sp. Mansfield 1925 margin shell
 Neogastropoda - Costellariidae
"Vexillum bristoli" = Uromitra bristoli
"Vexillum bristoli" = Uromitra bristoli Maury 1925 ribbed mitre
 Neogastropoda - Muricidae
Typhis sp. Montfort 1810 murex snail
poorly preserved, fragment
 Neogastropoda - Mangeliidae
"Drillia niaddrina n. sp." = Bellaspira niaddrina
"Drillia niaddrina n. sp." = Bellaspira niaddrina Mansfield 1925 snail
 Neogastropoda - Drilliidae
"Drillia consors" = Hindsiclava consors, "Drillia inadrina n. sp." = Syntomodrillia inadrina, Drillia nitrina n. sp., Drillia daditrina n. sp., Drillia inniadda n. sp., Drillia pennyi n. sp., Drillia tridadina n. sp.
"Drillia consors" = Hindsiclava consors Sowerby 1850 snail
SUBSPECIES: D. consors trinitatiensis n. subsp.
"Drillia inadrina n. sp." = Syntomodrillia inadrina Mansfield 1925 snail
Drillia nitrina n. sp. Mansfield 1925 snail
Drillia daditrina n. sp. Mansfield 1925 snail
Drillia inniadda n. sp. Mansfield 1925 snail
Drillia pennyi n. sp. Mansfield 1925 snail
Includes D. pennyi acaria n. subsp.
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. snail
Glyphostoma caronensis n. sp. Mansfield 1925 snail
Glyphostoma triniada n. sp. Mansfield 1925 snail
 Neogastropoda - Borsoniidae
"Borsonia (Paraborsonia) brassoensis n. sp." = Paraborsonia brassoensis, Microdrillia trina n. sp.
"Borsonia (Paraborsonia) brassoensis n. sp." = Paraborsonia brassoensis Mansfield 1925 snail
Microdrillia trina n. sp. Mansfield 1925 snail
 Neogastropoda - Conidae
"Conus multiliratus" = Conasprelloides multiliratus
"Conus multiliratus" = Conasprelloides multiliratus Olsson 1922 cone shell
SUBSPECIES: C. multiliratus walli n. subsp.
 Neogastropoda - Terebridae
 Vermetoidea - Vermetidae
Serpulorbis sp. Sasso 1827 worm shell
poorly preserved; fragment
 Calyptraeoidea - Calyptraeidae
Calyptraea sp. Lamarck 1799 slipper shell
poorly preserved
 Rissooidea - Rissoidae
Rissoina sp. d'Orbigny 1840 snail
poorly preserved
 Rissooidea - Vitrinellidae
"Adeorbis guppyi n. sp." = Cyclostremiscus (Ponocyclus) guppyi
"Adeorbis guppyi n. sp." = Cyclostremiscus (Ponocyclus) guppyi Mansfield 1925 snail
 Sorbeoconcha - Turritellidae
"Turritella altilira" = Turritella (Bactrospira) altilira Conrad 1857 turret shell
Includes T. altilira chiriquensis
Turritella (Broderiptella) caronensis Mansfield 1925 turret shell
SUBSPECIES: T. gatunensis caronensis n. subsp.
 Sorbeoconcha - Cerithiidae
"Clava sp." = Rhinoclavis, Bittium sp.
"Clava sp." = Rhinoclavis Swainson 1840 cerith snail
poorly preserved; juvenile
Bittium sp. Gray 1847 cerith snail
poorly preserved; 2 species
 Architectonicoidea - Architectonicidae
Architectonica sp. Röding 1798 sundial
poorly preserved; juvenile
 Trochoidea - Trochidae
Calliostoma rhombotum n. sp. Mansfield 1925 top snail
Scaphopoda
 Gadilida - Gadilidae
Cadulus caronensis n. sp. Mansfield 1925 tusk shell
Gymnolaemata
 Cheilostomata - Cupuladriidae
Cupuladria canariensis
poorly preserved
 Cheilostomata - Microporidae
Cupularia umbellata
poorly preserved