SDMNH 0645 (Pleistocene of Mexico)

Where: Baja California, Mexico (29.0° N, 118.2° W: paleocoordinates 29.0° N, 118.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Discovery Point Formation, Late/Upper Pleistocene (0.1 - 0.0 Ma)

• 127-117 ka age (Marine Isotope Substage 5e) for corals that were directly dated from localities SDMNH 0633 (UCMP D1547), 0644, and 2465 (Muhs 1994); dates are inferred to apply to the rest of the Discovery Point Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: perireef or subreef; lithified conglomerate and limestone

• Discovery Point Formation: coarsely clastic sediments that grade laterally from conglomerate, locally with pebbles of volcanic origin, to a biostrome formed chiefly of coral fragments and mollusk shells.

Size classes: macrofossils, microfossils

Collected by C.L. Hubbs in 1960; reposited in the SDSM

Primary reference: D. R. Lindberg, B. Roth, M. G. Kellogg and C. L. Hubbs. 1980. Invertebrate megafossils of Pleistocene (Sangamon Interglacial) age from Isla de Guadalupe, Baja California, Mexico. In D. M. Power (ed.), The California Islands: Proceedings of a Multidisciplinary Symposium 41-70 [W. Kiessling/U. Merkel/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 194546: authorized by Patricia Holroyd, entered by Emily Orzechowski on 21.06.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Arcidae
Barbatia reeveana d'Orbigny 1846 clam
Gastropoda
 Trochoidea - Tegulidae
"Tegula eiseni" = Agathistoma eiseni, "cf. Norrisia norrisi" = Norrisia norrisii
"Tegula eiseni" = Agathistoma eiseni Jordan 1936 snail
"cf. Norrisia norrisi" = Norrisia norrisii Sowerby I 1838 snail
 Trochoidea - Turbinidae
"Astraea undosa" = Megastraea undosa
"Astraea undosa" = Megastraea undosa Wood 1828 snail
 Lepetellida - Fissurellidae
Fissurella volcano Reeve 1849 snail
 Patellida - Lottiidae
"Collisella limatula" = Lottia limatula
"Collisella limatula" = Lottia limatula Carpenter 1864 limpet
 Neogastropoda - Muricidae
Thais planospira murex snail
 Neogastropoda - Columbellidae
Mitrella guttata Sowerby 1832 snail
 Neogastropoda - Conidae
"Conus californicus" = Californiconus californicus
"Conus californicus" = Californiconus californicus Reeve 1844 cone shell
 Sorbeoconcha - Cypraeidae
"cf. Cypraea cernica" = Erosaria cernica
"cf. Cypraea cernica" = Erosaria cernica Sowerby 1870 cowry
 Sorbeoconcha - Littorinidae
"Littorina keenae" = Littorina (Neritrema) keenae
"Littorina keenae" = Littorina (Neritrema) keenae Rosewater 1978 periwinkle
 Sorbeoconcha - Hipponicidae