Where: Guayas, Ecuador (2.7° S, 80.3° W: paleocoordinates 4.7° S, 74.5° W)
• outcrop-level geographic resolution
When: Posojra Formation, Early/Lower Oligocene to Early/Lower Oligocene (33.9 - 23.0 Ma)
• SOURCE: composite assemblage from small exposures exposed along Guayas River. AGE: Some workers have placed this unit into the Miocene, but the fauna shows no affinities with the Miocene faunas of Zorritos and Amen. More affinity exists with the basal Heath Shale or Calet Mero and possibly equivalent to the Punta Barvo or Heath shales.
• formation-level stratigraphic resolution
Environment/lithology: marine; lithified sandstone
Size class: macrofossils
Collection methods: quarrying, ,
• COLLECTOR: unknown collectors, presumably this is a composite of some collecting effort. REPOSITORIES: unknown repsotories
Primary reference: G. Shepard. 1937. The geology of south-western Ecuador. Published by AAPG; lists some otherwise unpublished faunal lists, identified by Woodring and Vaughan; nomenclature is antiquated. [A. Miller/A. Hendy]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 61201: authorized by Austin Hendy, entered by Austin Hendy on 30.05.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Arca (Scapharca) meroensis Olsson 1931 clam | |
"Clementia peruviana" = Clementia (Egesta) peruviana, Pitaria (Lamelliconcha) wolfi, "Chione posorjensis" = Chione (Chionopsis) posorjensis
"Clementia peruviana" = Clementia (Egesta) peruviana Olsson 1928 venus clam
Pitaria (Lamelliconcha) wolfi Olsson 1931 venus clam
"Chione posorjensis" = Chione (Chionopsis) posorjensis Olsson 1931 venus clam | |
Macoma meroensis, "Tellina (Angulus) sp." = Angulus
Macoma meroensis Olsson 1931 tellin clam
"Tellina (Angulus) sp." = Angulus Megerle 1811 tellin clam | |
Gastropoda | |
Crepidula sp. Lamarck 1799 slipper shell | |
Cerithium sp. Bruguière 1789 cerith snail | |
Turritella meroensis Olsson 1931 turret shell | |
Epitonium sp. Bolten 1798 wentletrap | |
Ampullinopsis spenceri Cooke 1919 snail | |
Sinum multilineatum moon snail | |
Terebra sp. Bruguière 1789 auger snail | |
"Acanthina (Chorus) sula" = Chorus sula
"Acanthina (Chorus) sula" = Chorus sula Olsson 1931 snail | |
"Pseudoliva parinasensis" = Pseudoliva (Buccinorbis) parinasensis
"Pseudoliva parinasensis" = Pseudoliva (Buccinorbis) parinasensis Woods 1922 snail Subspecies: P. parinasensis mancorensis
| |
"Olivancillaria (Agaronia) cotopaxi" = Agaronia, Olivancillaria (Agaronia) antisana
"Olivancillaria (Agaronia) cotopaxi" = Agaronia snail
Olivancillaria (Agaronia) antisana Olsson 1931 snail | |
Olivella (Lamprodoma) sp. Swainson 1840 olive snail
Olivancillaria (Olivancillaria) aequatorialis Olsson 1931 olive snail
Oliva (Oliva) pichnincha olive snail | |
Siphonalia sp. Adams 1863 true whelk
Phos sp. Monfort 1810 true whelk |