DV 1254-1-2, DV 1628 (Unit I+II) [Huacllaco beds] (Pliocene of Peru)

Where: Peru (15.9° S, 74.2° W: paleocoordinates 16.0° S, 73.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Huacllaco Formation, Late/Upper Pliocene (3.6 - 2.6 Ma)

• STRATIGRAPHIC RELATIONS: From the "Huacllaco beds", for which lithostratigraphic relations are not discussed. AGE: Late Pliocene, as contains early Late Pliocene index molluscs and underlies terrace deposits of latest Pliocene age. STRATIGRAPHIC POSITION: From units I and II in lower part of section.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; unlithified sandstone

• SPECIFIC LITHOLOGY: Not stated, but apparently siliciclastic (coarse). LITHIFICATION: Unlithified based on figured specimens.

Size class: macrofossils

Collected by DeVries; reposited in the UWBM

• COLLECTOR: DeVries. REPOSITORY: UWBM, Washington.

Primary reference: T. J. DeVries. 2005. Pterorytis pacanana new species (Gastropoda: Muricidae): circumstantial evidence for late Pliocene El Niño events in southern Peru. The Nautilus 119(4):164-168 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 80409: authorized by Austin Hendy, entered by Austin Hendy on 20.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Authoritative publication, with modern nomenclature, subgenus and species-resolution taxonomic assignments.
Bivalvia
 Mytilida - Mytilidae
Lithophaga sp. Röding 1798 mussel
Choromytilus chorus Molina 1782 mussel
 Pectinida - Pectinoidae
Gastropoda
 Lepetellida - Fissurellidae
Fissurella (Fissurella) aranea DeVries 2008 snail
Fissurella (Fissurella) limbata2 Sowerby 1835 snail
 Trochoidea - Trochidae
Priscoacritia collapsa, "Tegula (Chlorostoma) sp." = Chlorostoma
Priscoacritia collapsa DeVries and Hess 2004 top snail
"Tegula (Chlorostoma) sp." = Chlorostoma Swainson 1840 top snail
 Patellida - Acmaeidae
Acmaeidae indet. Forbes 1850 limpet
 Patellida - Nacellidae
Nacella (Patinigera) oblea n. sp.1 DeVries 2007 limpet
Nacella (Patinigera) chalaensis n. sp.1 DeVries 2007 limpet
Nacella (Patinigera) intiforma1 DeVries 2007 limpet
 Neogastropoda - Thaisidae
 Neogastropoda - Muricidae
Acanthina triangularis DeVries 2003 unicorn
Herminespina mirabilis Möricke 1896 murex snail
Stramonita sp. Schumacher 1817 murex snail
Concholepas nodosa Möricke 1896 murex snail
Concholepas camerata DeVries 2000 murex snail
Xanthochorus sp. murex snail
Xanthochorus buxeus Broderip 1833 murex snail