El Pilar Tank, Adobe Canyon (Cretaceous of the United States)

Also known as El Pilar locality 56, UALP 56

Where: Santa Cruz County, Arizona (31.7° N, 110.8° W: paleocoordinates 39.6° N, 83.9° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Fort Crittenden Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• age possibly Santonian but probably Campanian - assigned to late Campanian by Heckert et al. 2003; "shale member" of formation, erroneously attributed to "Upper Transitional Unit" (which = Turney Ranch Fm.) according to Lucas & Heckert 2005

• member-level stratigraphic resolution

Environment/lithology: fluvial; lithology not reported

• "fluvial sediment deposited by a meandering stream system"

Size class: macrofossils

Collected by H. Miller, R. McCord, A. Heckert in 1964-2003

Primary reference: R. Moore and H. W. Miller. 1960. A dinosaur-bearing section of Cretaceous rocks in the Empire Mountains, Pima County, Arizona. Arizona Geological Society Digest 3:57-61 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24915: authorized by John Alroy, entered by John Alroy on 22.08.2002, edited by Matthew Carrano and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

• partially revised from Miller 1964 JP and Miller and Schwab 1966
Pancrustacea
  -
Insecta indet.6 Linnaeus 1758 insect
claw, UALP 53
Insecta
 Diptera - Culicidae
Culicidae indet.6 Meigen 1818 mosquito
Ostracoda
 Podocopida -
Cypridopsis sp.6 ostracod
Bivalvia
 Unionida -
Protelliptio sp.5 Russell 1934 clam
 Unionida - Unionidae
Unio sp.5 Philipsson 1788 freshwater mussel
Gastropoda
 Architaenioglossa - Viviparidae
Viviparus sp.5 Montfort 1810 snail
 Basommatophora - Planorbidae
Gyraulus sp.6 Charpentier 1837 pulmonate
 Basommatophora - Physidae
Actinopteri
 Elopiformes - Elopidae
Elopidae indet.5 Bonaparte 1846
 Crossognathiformes - Pachyrhizodontidae
cf. Pachyrhizodus sp.4 Agassiz 1850
UALP 1908
 Pycnodontiformes - Pycnodontidae
Pycnodontidae indet.3 Agassiz 1835
 Amiiformes - Palaeolabridae
Palaeolabrus montenensis4 bowfin
UALP 1923
 Amiiformes - Amiidae
Amiidae indet.3 Huxley 1861 bowfin
UALP 43
Melvius sp.4 Bryant 1987 bowfin
UALP 16
 Lepisosteiformes -
"cf. Lepidotus sp." = Lepidotes5
"cf. Lepidotus sp." = Lepidotes5 Agassiz 1843 gar
 Lepisosteiformes - Lepisosteidae
Lepisosteus occidentalis4 Leidy 1856 gar
UALP 1922, 1930, 1913, 1917, 1912
Reptilia
 Testudines - Trionychidae
Trionychidae indet.4 Gray 1825 softshell turtle
"s.l."; UALP 1921
Trionychinae indet.1 softshell turtle
 Testudines - Adocidae
Adocus sp.4 Cope 1868 turtle
UALP 1903, 1919, 1921, 3646
 Testudines - Pantrionychidae
Plastomenus sp.4 Cope 1873 turtle
UALP 1909, 1915
 Avetheropoda - Tyrannosauridae
Tyrannosauridae indet.3 Osborn 1906 tyrannosaurid
 Neornithischia - Hadrosauridae
Hadrosauridae indet.5 Cope 1869 hadrosaurid
Hadrosauridae indet.2 Cope 1869 hadrosaurid
UALP 4005 (caudal vertebra)
 Crocodylia - Alligatoridae
Alligatoridae indet.4 Gray 1844 crocodilian
UALP 1902, 1904; ASDM 974, tooth
Charophyceae
 Charales - Characeae