Pointe-á-Pierre (Cretaceous of Trinidad and Tobago)

Where: Trinidad and Tobago (10.3° N, 61.5° W: paleocoordinates 9.1° N, 29.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Aptian (125.0 - 113.0 Ma)

• "If these fossils constituted an assemblage of contemporary forms, it may be seen then their most probable age is Barremian or Aptian. The only species which, apart from this record, appears to be known only from the Neocomian is Exogyra minos."

•W. Kiessling: Age call changed from Barremian-Aptian to Aptian based on Kugler and Bolli (1967)

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, concretionary, shelly/skeletal, red, argillaceous siltstone and lenticular limestone

• "Impure grey silt with crimson claystone nodules, nodular limestone lenses, and fossil shells."

Size class: macrofossils

Collection methods: surface (in situ), mechanical,

Primary reference: L. R. Cox. 1954. Lower Cretaceous mollusca from Pointe-A-Pierre, Trinidad. Journal of Paleontology 28(5):622-636 [J. Alroy/M. Sommers/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 1868: authorized by John Alroy, entered by Mike Sommers on 10.06.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "The 'Remanie Bed' has yielded several species which, so far, have not been found in other areas. Unfortunately, most of the specimens are so eroded that except in the case of two gastropods it has been thought inadvisable to found new species upon them."
Bivalvia
 Arcida - Glycymerididae
? Trigonarca sp. Conrad 1862 clam
originally entered as "? Trigonarca sp."
 Arcida - Cucullaeidae
"Idonearca cf. glabra" = Cucullaea (Idonearca), "Idonearca sp." = Cucullaea (Idonearca)
"Idonearca cf. glabra" = Cucullaea (Idonearca) clam
originally entered as "Idonearca cf. glabra"
"Idonearca sp." = Cucullaea (Idonearca) Conrad 1862 clam
 Pectinida - Pectinoidae
Spondylus sp. Linnaeus 1758 scallop
Neithea atava Roemer 1839 scallop
Chlamys sp. Röding 1798 scallop
Prohinnites favrinus scallop
count is a minimum
 Pectinida - Limidae
Ctenoides sp. Mörch 1853 file clam
 Ostreida - Arctostreidae
Gryphaea cf. corrugata oyster
originally entered as "Gryphaea cf. corrugata"
Exogyra latissima oyster
"the most abundant," so 50 is a minimum
Lopha colubrina oyster
(Arctostrea) "about 50" specimens
 Carditida - Crassatellidae
Ptychomya "sp. A" clam
sp. A
Ptychomya "sp. B" clam
sp. B
 Carditida - Carditidae
? Cardita sp. Bruguière 1792 clam
originally entered as "? Cardita sp."
 Cardiida - Arcticidae
"Cyprina sp." = Arctica, Epicyprina angulata
"Cyprina sp." = Arctica Schumacher 1817 clam
 Hiatellida - Hiatellidae
 Lucinida - Lucinidae
Sphaera corrugata Sowerby 1822 clam
"several specimens" (so at least 3)
 Trigoniida - Megatrigonioidae
Megatrigonia longa clam
(Rutitrigonia)
Pterotrigonia tocaimana clam
"about 20" specimens
Gastropoda
 Euomphalina - Paraturbinidae
Chartroniella saxorum n. sp. snail
n. sp.
 Neogastropoda - Turridae
"Oonia trinidadensis" = Pseudomelania (Oonia)
"Oonia trinidadensis" = Pseudomelania (Oonia) turrid
n. sp.
 Stromboidea - Aporrhaidae
Aporrhais sp. da Costa 1778 snail
Harpagodes sp. Gill 1870 snail