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.
Maxillopoda
 Sessilia - Balanidae
Balanus sp. Da Costa 1778 barnacle
Bivalvia
 Pectinida - Pectinoidae
"? Lyropecten (? Nodipecten) cf. nodosus" = Nodipecten nodosus, "Pecten (Flabellipecten) gatunensis" = Leopecten gatunensis, "Aequipecten aff. plurinominis" = Lindapecten plurinominis
"? Lyropecten (? Nodipecten) cf. nodosus" = Nodipecten nodosus Linnaeus 1758 scallop
"Pecten (Flabellipecten) gatunensis" = Leopecten gatunensis Toula 1909 scallop
subsp. gatunensis
"Aequipecten aff. plurinominis" = Lindapecten plurinominis Pilsbry and Johnson 1917 scallop
Gastropoda
 Tonnoidea - Tonnidae
Malea aff. elliptica Pilsbry and Johnston 1917 tun shell
 Tonnoidea - Cassidae
Cypraecassis cf. tenuis Wood 1828 snail
 Sorbeoconcha - Turritellidae
Turritella (Torcula) altilira Conrad 1857 turret shell
subsp.
 Architectonicoidea - Architectonicidae
"Architectonica (Architectonica) nobilis" = Architectonica nobilis
"Architectonica (Architectonica) nobilis" = Architectonica nobilis Röding 1798 sundial
subsp. nobilis
Echinoidea
 Spatangoida -
Schizobrissus kewi n. sp. Durham 1961 heart urchin
 Spatangoida - Paleopneustidae
Pericosmus israelskyi n. sp. Durham 1961 heart urchin
 Spatangoida - Schizasteridae
Schizaster costaricensis n. sp. Durham 1961 heart urchin
 Spatangoida - Brissidae
Plagiobrissus costaricensis n. sp. Durham 1961 heart urchin
Plagiobrissus malavassii n. sp. Durham 1961 heart urchin
Brissopsis sp. Agassiz 1840 heart urchin
 Echinolampadoida - Echinolampadidae
Echinolampas woodringi n. sp. Durham 1961 sea urchin
 Clypeasteroida - Clypeasteridae
Clypeaster sp. Lamarck 1801 sand dollar