Carlsbad Ankylosaur (SDNHM Loc. 3392) (Cretaceous of the United States)

Also known as Letterbox Canyon

Where: California (33.1° N, 117.3° W: paleocoordinates 38.8° N, 87.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Point Loma Formation (Rosario Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• base of CC 22 = 75.5 Ma

• bed-level stratigraphic resolution

Environment/lithology: offshore; gray, blue mudstone and lithified sandstone

• "deposited in a shallow marine environment a few km offshore in an area that was protected by an island or peninsula of metavolcanic rock."
• "blue-gray massive mudstones with occasional interbeds and lenses of fine- to medium-grained, locally cemented sandstones."

Size classes: macrofossils, mesofossils

Collected by B. Riney in 1985

Collection methods: salvage, quarrying, surface (in situ), mechanical,

• collected by Brad Riney (listed as 1988 in Reynolds 1994)

Primary reference: W. P. Coombs, Jr. and T. A. Deméré. 1996. A Late Cretaceous nodosaurid ankylosaur (Dinosauria: Ornithischia) from marine sediments of coastal California. Journal of Paleontology 70(2):311-326 [M. Carrano/M. Carrano/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 60806: authorized by Matthew Carrano, entered by Matthew Carrano on 23.05.2006, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pectinida - Pectinoidae
Spondylus sp. Linnaeus 1758 scallop
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
Gastropoda indet. Cuvier 1797 snail
 Cypraeoidea - Cypraeidae
Bernaya (Bernaya) crawfordcatei n. sp.2 Groves 1990 cowry
Bernaya (Protocypraea) rineyi n. sp.2 Groves 1990 cowry
 Ammonoidea -
 Lamniformes - Anacoracidae
Squalicorax sp. Whitley 1939 crow shark
 Euselachii - Mitsukurinidae
Scapanorhynchus sp. Woodward 1889 goblin shark
 Ornithischia -
Aletopelta coombsi n. gen. n. sp.1
Aletopelta coombsi n. gen. n. sp.1 Ford and Kirkland 2001 ornithischian
SDSNH 33909