Hodson Loc. 86 [Urumaco Fm] (Miocene of Venezuela)

Where: Falcon, Venezuela (11.2° N, 70.3° W: paleocoordinates 10.9° N, 68.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Middle Member (Urumaco Formation), Late/Upper Miocene (11.6 - 5.3 Ma)

• LITHOSTRATIGRAPHY: From the Urumaco Formation, which overlies the Socorro Formation (Middle-Late Miocene) and is overlain by the Codore Formation (late Miocene-early Pliocene). AGE: Late Miocene, based on recent foraminiferal biostratigraphy (Smith et al., 2010) and Sr analyses (Hendy et al., unpublished data); upper Middle Miocene in Hodson & Hodson (1931).

• formation-level stratigraphic resolution

Environment/lithology: marine; unlithified siltstone

• LITHOLOGY: Not stated, but most fossiliferous assemblages in Middle Urumaco are from siltstone facies. LITHIFICATION: Not stated, but most fossiliferous assemblages in Middle Urumaco are unlithified.

Size class: macrofossils

Collected by Hodson; reposited in the PRI

Primary reference: F. Hodson, H. K. Hodson, and G. D. Harris. 1927. Some Venezualan and Caribbean Mollusks. Bulletins of America Paleontology 13(49):1-160 [A. Miller/A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61032: authorized by Arnold Miller, entered by Arnold Miller on 29.05.2006, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Arcidae
"Arca (Scapharca) vueltana" = Anadara (Cunearca) zorritensis
"Arca (Scapharca) vueltana" = Anadara (Cunearca) zorritensis Spieker 1922 ark
 Arcida - Glycymerididae
"Glycymeris canalis" = Tucetona pectinata canalis1
"Glycymeris canalis" = Tucetona pectinata canalis1 Brown and Pilsbry 1911 clam
 Pectinida - Anomiidae
"Anomia venezuelana" = Anomia (Anomia) peruviana
"Anomia venezuelana" = Anomia (Anomia) peruviana d'Orbigny 1846 jingle
 Ostreida - Ostreidae
Ostrea democraciana Hodson et al. 1927 oyster
Subspecies: Ostrea democraciana cujiensis
 Carditida - Crassatellidae
"Crassatellites trinitarius" = Eucrassatella (Hybolophus) trinitaria
"Crassatellites trinitarius" = Eucrassatella (Hybolophus) trinitaria Maury 1925 clam
Subspecies: Crassatelllites trinitarius venzuelanus
 Carditida - Carditidae
"Venericardia zuliana" = Cyclocardia zuliana
"Venericardia zuliana" = Cyclocardia zuliana Hodson 1929 clam
Subspecies: Venericardia zulianana maracaibensis
 Pholadida - Corbulidae
"Corbula (Caryocorbula) urumacoensis" = Caryocorbula urumacoensis2
"Corbula (Caryocorbula) urumacoensis" = Caryocorbula urumacoensis2 Hodson and Hodson 1931 clam
 Cardiida - Veneridae
Macrocallista maculata Linnaeus 1758 venus clam
"Clementia dariena" = Clementia (Clementia) dariena Conrad 1855 venus clam
Cyclinella falconensis Hodson et al. 1927 venus clam
 Cardiida - Tellinidae
"Macoma (Psammacoma) democraciana" = Psammacoma democraciana3
"Macoma (Psammacoma) democraciana" = Psammacoma democraciana3 Hodson 1931 tellin clam
 Thraciida - Periplomatidae
Periploma venezuelana2 Hodson 1931 clam
Gastropoda
 Naticoidea - Naticidae
"Polinices subclausa" = Polinices hepaticus Röding 1798 moon snail
Subspecies: Polinices subclausa lavelana
Polinices stanislasmeunieri Maury 1917 moon snail
Subspecies: Polinices stanislas-meunieri venezuelana
 Sorbeoconcha - Turritellidae
Turritella robusta Grzybowski 1899 turret shell
Subspecies: Turritella robusta fredeai
"Turritella bifastigata" = Turritella (Broderiptella) bifastigata Nelson 1870 turret shell
Two Subspecies: Turitella bifastigata democraciana, Turitella bifastigata maracaibensis