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."
Show authors, comments, and common names
Gastropoda
 Sorbeoconcha - Aporrhaidae
Harpagodes sp., Aporrhais sp.
Harpagodes sp. Gill 1870 snail
Aporrhais sp. da Costa 1778 snail
 Pseudomelanoidea - Pseudomelaniidae
"Oonia trinidadensis" = Pseudomelania (Oonia)
"Oonia trinidadensis" = Pseudomelania (Oonia) snail
n. sp.
 Euomphalina - Paraturbinidae
Chartroniella saxorum n. sp.
Chartroniella saxorum n. sp. snail
n. sp.
Bivalvia
 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
 Arcida - Glycymerididae
? Trigonarca sp.
? Trigonarca sp. Conrad 1862 clam
originally entered as "? Trigonarca sp."
 Ostreida - Ostreidae
Lopha colubrina
Lopha colubrina oyster
(Arctostrea) "about 50" specimens
 Ostreida - Gryphaeidae
Exogyra latissima, Exogyra minos, Gryphaea cf. corrugata
Exogyra latissima oyster
"the most abundant," so 50 is a minimum
Gryphaea cf. corrugata oyster
originally entered as "Gryphaea cf. corrugata"
 Pectinida - Pectinoidae
Prohinnites favrinus, Chlamys sp., Spondylus sp.
Prohinnites favrinus scallop
count is a minimum
Chlamys sp. Röding 1798 scallop
Spondylus sp. Linnaeus 1758 scallop
 Pectinida - Neitheoidae
Neithea bellula, Neithea atava
Neithea atava Roemer 1839 scallop
 Pectinida - Limidae
Ctenoides sp.
Ctenoides sp. Mörch 1853 file clam
 Trigoniida - Trigoniidae
Megatrigonia longa
Megatrigonia longa clam
(Rutitrigonia)
 Trigoniida - Megatrigonioidae
Pterotrigonia tocaimana
Pterotrigonia tocaimana clam
"about 20" specimens
 Lucinida - Lucinidae
Sphaera corrugata
Sphaera corrugata Sowerby 1822 clam
"several specimens" (so at least 3)
 Cardiida - Arcticidae
Epicyprina angulata, "Cyprina sp." = Arctica
"Cyprina sp." = Arctica Schumacher 1817 clam
 Hiatellida - Hiatellidae
Panopea gurgitis
 Carditida - Crassatellidae
Ptychomya "sp. A", Ptychomya "sp. B"
Ptychomya "sp. A" clam
sp. A
Ptychomya "sp. B" clam
sp. B
 Carditida - Carditidae
? Cardita sp.
? Cardita sp. Bruguière 1792 clam
originally entered as "? Cardita sp."