Lower Zoritos Fm - Quebrada La Cruz (Miocene of Peru)

Where: Peru (3.8° S, 80.5° W: paleocoordinates 5.0° S, 76.3° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Zorritos Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• Lower Zorritos fauna principally known from transitional beds at the base of the Zorritos sandstones

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, yellow, calcareous sandstone

• "The matrix in which most of the specimens so far collected occur is far too resistant to permit the extraction by any known means of specimens at all susceptible to injury through moderate violence; the sands are

•firmly cemented by calcium carbonate, and attempts at removal of matrix by loosening it through chemical destruction of the cement fail because the shell material is of the same composition, and is destroyed along with the matrix" (Spieker 1922)

Collection methods: surface (in situ)

Primary reference: A. A. Olsson. 1932. Contributions to the Tertiary Paleontology of Northern Peru: Part 5, Miocene Mollusca. Bulletins of American Paleontology 19(68):1-272 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66141: authorized by Linda Ivany, entered by Linda Ivany on 30.09.2006, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

• molluscs only
Gastropoda
 Cerithioidea - Turritellidae
Turritella prenuncia Spieker 1922 turret shell
Turritella fica Olsson 1932 turret shell
 Neogastropoda - Olivellidae
"Olivancillaria (Agaronia) dotapaxi" = Agaronia
"Olivancillaria (Agaronia) dotapaxi" = Agaronia snail
 Neogastropoda - Olividae
"Olivella (Callinanax) tapira" = Olivella (Niteoliva) tapira
"Olivella (Callinanax) tapira" = Olivella (Niteoliva) tapira Olsson 1932 olive snail
 Neogastropoda - Buccinidae
"Phos (? Antillophos) hodsoni" = Cymatophos hodsoni Olsson 1932 true whelk
Phos latirugatus Spieker 1922 true whelk
Phos (Antillophos) woodringi Addicott 1970 true whelk
 Neogastropoda - Nassariidae
"Tritiaria peruviana" = Nassarius (Tritiaria), "Tritiaria cieza" = Nassarius (Tritiaria)
"Tritiaria peruviana" = Nassarius (Tritiaria) snail
"Tritiaria cieza" = Nassarius (Tritiaria) snail
 Neogastropoda - Fasciolariidae
 Neogastropoda - Columbellidae
"Strombina (Strombina) tumbezia" = Sincola (Sinaxila) tumbezia
"Strombina (Strombina) tumbezia" = Sincola (Sinaxila) tumbezia Olsson 1932 snail
 Neogastropoda - Melongenidae
Melongena melongena Linnaeus 1758 snail
subsp. consors
 Neogastropoda - Conidae
Conus (Leptoconus) sp., "Conus (Dendroconus) bravoi" = Conus bravoi, "Conus (Leptoconus) sophus" = Conus imitator sophus, "Conus (Leptoconus) multiliratus" = Conasprelloides multiliratus
Conus (Leptoconus) sp. Swainson 1840 cone shell
"Conus (Dendroconus) bravoi" = Conus bravoi Spieker 1922 cone shell
"Conus (Leptoconus) sophus" = Conus imitator sophus Olsson 1932 cone shell
"Conus (Leptoconus) multiliratus" = Conasprelloides multiliratus Olsson 1922 cone shell
subspecies spiekeri
 Neogastropoda - Terebridae
"Terebra (Strioterebrum) zapotalensis" = Strioterebrum, "Terebra (Strioterebrum) herviderana" = Strioterebrum gausapatum, "Terebra (Strioterebrum) pavonia" = Strioterebrum gausapatum, "Terebra (Strioterebrum) ulloa" = Strioterebrum ulloa
"Terebra (Strioterebrum) zapotalensis" = Strioterebrum auger snail
"Terebra (Strioterebrum) herviderana" = Strioterebrum gausapatum Brown and Pilsbry 1911 auger snail
"Terebra (Strioterebrum) pavonia" = Strioterebrum gausapatum Brown and Pilsbry 1911 auger snail
"Terebra (Strioterebrum) ulloa" = Strioterebrum ulloa Olsson 1932 auger snail
 Neogastropoda - Turridae
"Turricula (Pleurofusia) cruziana" = Cruziturricula cruziana, Polystira sp.
"Turricula (Pleurofusia) cruziana" = Cruziturricula cruziana Olsson 1932 turrid
Polystira sp. Woodring 1928 turrid
 Neogastropoda - Thaisidae
"Acanthina (Chorus) sula" = Chorus sula
"Acanthina (Chorus) sula" = Chorus sula Olsson 1931 snail
subpecies cruziana
 Neogastropoda - Cancellariidae
"Cancellaria (Aphera) peruana" = Aphera peruana, Cancellaria (Cancellaria) sp.2
"Cancellaria (Aphera) peruana" = Aphera peruana Nelson 1870 snail
Cancellaria (Cancellaria) sp.2 Lamarck 1799 snail
 Sorbeoconcha - Ficidae
Pyrula peruviana Spieker 1922 fig shell
 Sorbeoconcha - Personidae
Distorsio ringens1 Philippi 1887 snail
subsp. ringens
 Sorbeoconcha - Cypraeidae
"Cypraea angustirima" = Muracypraea angustirima
"Cypraea angustirima" = Muracypraea angustirima Spieker 1922 cowry
 Sorbeoconcha - Naticidae
"Polinices (Neverita) quirosana" = Neverita, Sinum carolanum, "Natica (Naticarius) sp." = Naticarius
"Polinices (Neverita) quirosana" = Neverita moon snail
Sinum carolanum Spieker 1922 moon snail
"Natica (Naticarius) sp." = Naticarius Dumeril 1806 moon snail
 Heterostropha - Architectonicidae
"Architectonica sexlinearis" = Architectonica nobilis
"Architectonica sexlinearis" = Architectonica nobilis Röding 1798 sundial
subsp. corusca
Bivalvia
 Arcida - Noetiidae
"Arca (Noetia) retractata" = Noetia
"Arca (Noetia) retractata" = Noetia clam
 Arcida - Arcidae
"Arca (Diluvarca) spiekeri" = Anadara (Scapharca) spiekeri, "Arca (Diluvarca) fissicosta" = Anadara (Rasia) fissicosta, "Arca (Cunearca) thalia" = Anadara (Cunearca), "Arca (Diluvarca) zapotalensis" = Anadara (Diluvarca), "Arca (Diluvarca) singewaldi" = Anadara (Diluvarca), Arca (Diluvarca) vanholsti
"Arca (Diluvarca) spiekeri" = Anadara (Scapharca) spiekeri Olsson 1932 clam
"Arca (Diluvarca) fissicosta" = Anadara (Rasia) fissicosta Spieker 1922 ark
"Arca (Cunearca) thalia" = Anadara (Cunearca) ark
"Arca (Diluvarca) zapotalensis" = Anadara (Diluvarca) ark
"Arca (Diluvarca) singewaldi" = Anadara (Diluvarca) ark
Arca (Diluvarca) vanholsti Spieker 1922 ark
 Lucinida - Lucinidae
Codakia sp. Scopoli 1777 clam
 Pholadida - Corbulidae
"Corbula (Hexacorbula) cruziana" = Bothrocorbula (Hexacorbula) cruziana, Corbula prenuncia, Corbula (Caryocorbula) fabiformis, "Corbula (Caryocorbula) bravoana" = Tenuicorbula bravoana
"Corbula (Hexacorbula) cruziana" = Bothrocorbula (Hexacorbula) cruziana Olsson 1932 clam
"Corbula (Caryocorbula) bravoana" = Tenuicorbula bravoana Spieker 1922 clam
 Cardiida - Veneridae
Transennella herviderana, "Pitaria (Pitaria) sapotana" = Pitar (Pitar) sapotanus, "Pitaria (Lamelliconcha) petersoni" = Lamelliconcha, "Clementia dariena" = Clementia (Clementia) dariena, Macrocallista helenae, "Chione (Lirophora) cf. hendersoni" = Lirophora, Chione (Chionopsis) propinqua, "Dosinia (Dosinidea) delicatissima" = Dosinia (Dosinia) delicatissima
"Pitaria (Pitaria) sapotana" = Pitar (Pitar) sapotanus Olsson 1932 venus clam
"Pitaria (Lamelliconcha) petersoni" = Lamelliconcha venus clam
"Clementia dariena" = Clementia (Clementia) dariena Conrad 1855 venus clam
"Chione (Lirophora) cf. hendersoni" = Lirophora venus clam
Chione (Chionopsis) propinqua Spieker 1922 venus clam
"Dosinia (Dosinidea) delicatissima" = Dosinia (Dosinia) delicatissima Brown and Pilsbry 1913 venus clam
 Cardiida - Cardiidae
"Cardium (Trigoniocardium) hannai" = Trigoniocardia (Trigoniocardia) hannai, "Cardium (Trachycardium) zorritense" = Trachycardium
"Cardium (Trigoniocardium) hannai" = Trigoniocardia (Trigoniocardia) hannai Olsson 1932 cockle
"Cardium (Trachycardium) zorritense" = Trachycardium cockle
 Cardiida - Tellinidae
"Tellina (Eurytellina) aequicincta" = Eurytellina aequicincta, "Macoma zapotalensis" = Psammacoma zapotalensis
"Tellina (Eurytellina) aequicincta" = Eurytellina aequicincta Spieker 1922 tellin clam
"Macoma zapotalensis" = Psammacoma zapotalensis Spieker 1922 tellin clam
 Carditida - Crassatellidae
Eucrassatella berryi Spieker 1922 clam