USGS Loc. 20001 - ridge between Candelaria and Río Ciruelas (Miocene to of Costa Rica)

Where: Costa Rica (10.0° N, 84.3° W: paleocoordinates 9.5° N, 82.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Early/Lower Miocene to Early/Lower Miocene (23.0 - 5.3 Ma)

• STRATIGRAPHIC RELATIONS: From unnamed lithostratigraphic unit. AGE: Early-Late Miocene, based on correlation of echinoid faunas with other assemblages; appears similar in age to Mesón and Tuxpan Fms of Mesico and the Ojo de Agua Fm of Venezuela. STRATIGRAPHIC POSITION: From unknown position within section.

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified siliciclastic sediments

• ENVIRONMENT: Probably accumulated in 100-300 m water depth.
• SPECIFIC LITHOLOGY: Not stated in text. LITHIFICATION: Poorly lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Malavassi in 1957; reposited in the USNM

Collection methods: surface (in situ),

• COLLECTOR: E. Malavassi V, 1957. REPOSITORY: USNM.

Primary reference: J. W. Durham. 1961. Miocene echinoids from the Valle Central, Costa Rica. Journal of Paleontology 35(3):480-488 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92098: authorized by Austin Hendy, entered by Austin Hendy on 29.10.2009, edited by Pedro Monarrez

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for echinoids. Molluscs not reported but are almost certainly present. NOMENCLATURE: Authoritative publication, with somewhat antiquated nomenclature, but with species-resolution identifications.
Thecostraca
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle
Gastropoda
 Heterostropha - Architectonicidae
"Architectonica (Architectonica) nobilis" = Architectonica nobilis
"Architectonica (Architectonica) nobilis" = Architectonica nobilis Röding 1798 sundial
subsp. nobilis
 Cerithioidea - Turritellidae
Turritella (Torcula) altilira Conrad 1857 turret shell
subsp.
 Sorbeoconcha - Cassidae
Cypraecassis cf. tenuis Wood 1828 snail
 Sorbeoconcha - Tonnidae
Malea aff. elliptica Pilsbry and Johnston 1917 tun shell
Bivalvia
 Pectinida - Pectinoidae
"Aequipecten aff. plurinominis" = Lindapecten plurinominis, "? Lyropecten (? Nodipecten) cf. nodosus" = Nodipecten nodosus, "Pecten (Flabellipecten) gatunensis" = Leopecten gatunensis
"Aequipecten aff. plurinominis" = Lindapecten plurinominis Pilsbry and Johnson 1917 scallop
"? Lyropecten (? Nodipecten) cf. nodosus" = Nodipecten nodosus Linnaeus 1758 scallop
"Pecten (Flabellipecten) gatunensis" = Leopecten gatunensis Toula 1909 scallop
subsp. gatunensis
Echinoidea
 Clypeasteroida - Clypeasteridae
Clypeaster sp. Lamarck 1801 sand dollar
 Echinolampadoida - Echinolampadidae
Echinolampas woodringi n. sp. Durham 1961 sea urchin
 Spatangoida - Paleopneustidae
Pericosmus israelskyi n. sp. Durham 1961 heart urchin
 Spatangoida - Schizasteridae
Schizaster costaricensis n. sp. Durham 1961 heart urchin
 Spatangoida - Brissidae
Plagiobrissus malavassii n. sp. Durham 1961 heart urchin
Plagiobrissus costaricensis n. sp. Durham 1961 heart urchin
Brissopsis sp. Agassiz 1840 heart urchin
Schizobrissus kewi n. sp. Durham 1961 heart urchin