Loc. 1 [Guadal Formation] (Miocene of Chile)

Where: Chile (47.0° S, 72.4° W: paleocoordinates 47.9° S, 66.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: From the Guadal Fm, which is overlain by the Galera Fm (Early-Middle Miocene). AGE: Late Oligocene-Early Miocene in text. Composition of the fauna reveals close similarity with those of the Patagoniano, and in particular the Monte Leon Fm. An Early Miocene age could be moe precise on the basis of sequence stratigraphic events. Early Miocene is assigned here. STRATIGRAPHIC POSITION: From upper part of the Guadal Formation.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray sandstone

• ENVIRONMENT: Siliciclastic, and not particularly shallow (i.e. lower inner-middle shelf) based on faunal compisition.
• SPECIFIC LITHOLOGY: Dark gray sandstone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Frassinetti & Covacevich in 1986-1988

Collection methods: surface (in situ),

• COLLECTOR: Presumably Frassinetti, C., and Covacevich, C. (1986-1988). REPOSITORY: Museo Nacional de Historia Natural, Santiago, Chile

Primary reference: D. Frassinetti and V. Covacevich. 1999. Invertibrados fósiles marinos de la Formación Guadal (Oligoceno superio-Mioceno inferior) en Pampa, Castillo region, región de Aisén, Chile. Servico Nacional de Geologia y Mineria Chile Boletin 51:1-96 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 78425: authorized by Austin Hendy, entered by Austin Hendy on 06.02.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda, bivalvia, anthozoa, bryozoa, brachiopoda, annelida, arthropoda, and echinodermata. NOMENCLATURE: Authoritative publication with taxonomic assignments to species-resolution.
Thecostraca
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle
Polychaeta
 Sabellida - Serpulidae
Serpula sp. Linnaeus 1758
Rhynchonellata
 Terebratulida - Terebratellidae
Terebratella "sp. 2" d'Orbigny 1847
Bivalvia
 Nuculanida - Malletiidae
Neilo ornata Sowerby 1846 clam
 Ostreida - Ostreidae
Crassostrea aff. hatcheri Ihering 1899 oyster
 Ostreida - Pinnidae
 Pectinida - Pectinoidae
""Chlamys" centralis" = Jorgechlamys centralis, "Zygochlamys geminatus" = Zygochlamys geminata
""Chlamys" centralis" = Jorgechlamys centralis Sowerby 1846 scallop
"Zygochlamys geminatus" = Zygochlamys geminata Sowerby 1846 scallop
 Arcida - Cucullaeidae
Cucullaea alta Sowerby 1846 clam
 Arcida - Arcidae
Arca (Arca) patagonica Ihering 1897 ark
 Carditida - Carditidae
Pleuromeris elegantoides Ortman 1902 clam
Cardiocardita inaequalis Philippi 1887 clam
 Solenida - Solenidae
Solena sp. Mörch 1853 clam
 Hiatellida - Hiatellidae
Panopea sp. Menard 1807 clam
Panopea bagualesia Ihering 1907 clam
Panopea nucleus Ihering 1899 clam
 Pholadomyida - Pholadomyidae
 Cardiida - Lahillidae
Lahillia sp. Cossmann 1899 clam
 Cardiida - Cardiidae
 Cardiida - Tellinidae
Tellina "sp. 1" Linnaeus 1758 tellin clam
Tellina "sp. 2" Linnaeus 1758 tellin clam
 Cardiida - Veneridae
Chione argentina venus clam
Chione patagonica Philippi 1887 venus clam
"Chione darwini" = Ameghinomya darwini Philippi 1887 venus clam
? Eurhomalea navidadiformis Frassinetti and Covacevich 1999 venus clam
 Pholadida - Pholadidae
Pholadidea patagonica Philippi 1887 clam
Gastropoda
 Opisthobranchia - Cylichnidae
Scaphander sp. Monfort 1810 snail
 Neotaenioglossa - Calyptraeidae
Trochita sp. Schumacher 1817 slipper shell
Calyptraea sp. Lamarck 1799 slipper shell
 Sorbeoconcha - Struthiolariidae
Struthiolarella ameghinoi Ihering 1897 snail
 Sorbeoconcha - Ficidae
Ficus carolina d'Orbigny 1847 fig shell
 Neogastropoda - Muricidae
Trophon sp. Montfort 1810 murex snail
Trophon cf. patagonicus Sowerby 1846 murex snail
 Neogastropoda - Volutidae
"Proscaphella "sp. 2"" = Miomelon, "Proscaphella "sp. 4"" = Miomelon, Proscaphella cossmanni
"Proscaphella "sp. 2"" = Miomelon Dall 1907 volute
"Proscaphella "sp. 4"" = Miomelon Dall 1907 volute
Proscaphella cossmanni Ihering 1907 volute
 Neogastropoda - Buccinidae
"Siphonalia" sp. Adams 1863 true whelk
 Sorbeoconcha - Cassidae
Semicassis ovulum Ortmann 1900 snail
 Sorbeoconcha - Vermetidae
Serpulorbis sp. Sasso 1827 worm shell
 Sorbeoconcha - Naticidae
Naticidae indet. Guilding 1834 moon snail
 Epitonioidea - Epitoniidae
Epitonium sp. Bolten 1798 wentletrap
 Cerithioidea - Turritellidae
Turritella ambulacrum Sowerby 1846 turret shell
 Trochoidea - Trochidae
"Gibbula" dalli Ihering 1897 top snail
 Ptenoglossa -
Peonza cf. torquata Olivera 1994 snail
Echinoidea
 Clypeasteroida - Monophorasteridae
Iheringiella patagonensis Desor 1847 sand dollar