Dinosaurs, Owen, 1842

Hunt, A. P. & Lucas, S. G., 1992, Stratigraphy, paleontology and age of the Fruitland and Kirtland Formations (upper Cretaceous), San Juan Basin, New Mexico, New Mexico Geological Society, New Mexico Geological Society 43 rd Annual Fall Field Conference Guidebook, pp. 217-239 : 225-228

Dinosaurs

The dinosaur faunas of the Fruitland and Kirtland Formations were first described in detail by Gilmore (1916), who based his study on specimens collected by Bauer and Reeside. Subsequently, the collections of Charles Sternberg were described by Wiman(1930, 1931, 1932, 1933), Osborn (1923), Gilmore (1935) and Ostrom (1960, 1961). Kues et al. (1977), Lehman (1981), Rowe et al. (1981), Lucas et al. (1987) and others have described subsequent discoveries ( Tables 5-7).

Bryozoa

?Conopeum sp.

Crustacea

?Xanthoidea sp.

Bivalvia

Ostrea glabra

Anomia gryphorhynchus

A large, undescribed collection from the upper Fruitland has been amassed by Wolberg and co-workers in the Fossil Forest area. These specimens are dominated by disarticulated material but include partial skeletons ( Hunt, 1984, 1991). They are housed at the University of Kansas and are being described by J. P. Hall.

Anomia gryphaeiformis

Modiola latiscostata

Unio holmesianus

Unio amarillensis

Unio gardneri

Unio reesiderei

The dinosaur specimens from the Fruitland and Kirtland Formations largely consist of disarticulated and isolated bones. Partial skeletons and skulls are uncommon (e.g., Wiman, 1930; Ostrom, 1961).

Unio brachypisthus

Unio neomexicanus

Unio brimhallensis

The dinosaur faunas of the Fruitland and Kirtland Formations were recently reviewed by Lucas et al. (1987). However, in the last 5 years there has been a marked increase in the literature on dinosaur taxonomy

Unio cf. Unio primaevus

Corbicula cytheriformes

Corbula chacoensis

Panopaea simulatrix

Teredina neomexicana

Teredina sp.

Gastropoda

Neritina baueri

Neritina sp.

Campeloma amarillensis

Tulotoma thompsoni

Bivalvia

Melania insculpta

? Unio pyramidatoides

?Goniobasis subtortuosa

Unio baueri

Physa reesidei

Unio sp.

Physa sp.

Gastropoda

Planorbis chacoensis

Viviparus sp

.

Chondrichthyes Selachii Hybodontidae Lonchidion selachos?Lonchidion selachos Hybodus sp. Isuridae Isurus sp. Orectolobidae Squatirhina americana Squatirhina sp. Batoidea Dasyatidae Myledaphus bipartitus Myledaphus sp. Pristidae Ischyrhiza avonicola Ptychotrygon cf. P. triangularis Squatirhina sp. Osteichthyes Acipenseriformes Acipenser cruciferus Polyodontidae Paleopsephurus wilsoni Amiiformes Amiidae Amia fragosa Amia cf. Amia uitaensis Amia sp. ? Amia chauliodeia Meivius thomasi Lepidosteiformes Lepisosteidae Atractasteus occidentalis Atractasteus sp. Elopiformes Phyllodontidae Paralbula casei Paralbula cf. P. casei cf. Pseudoegertonia sp. Perciformes Sciaenidae Platacodon nanus Amphibia Anura Discoglossidae Scotiophryne pustulosa Pelobatidae ? Eopelobates sp. Urodela Prosirenidae Prodesmodon cf. P. copei Batrachosauroididae Opisthotriton kayi? Urodela Cuttysarkus mcnallyi Reptilia Testudines Baenidae " Baena " nodosa Boremys pulchra Compsemys sp. Neurankylus eximius Dermaternydidae Adocus bossi Adocus kirtlandius Adocus sp. ? Basilemys sp. Trionychidae Aspideretes sp. Trionyx sp. indet Sauria Teiidae Leptochamops denticulatus Chamops segnis Anguidae cf. Gerrhonotus sp. gen. et sp. indet. Serpentes Aniliidae Coniopholis cosgriffi Crocodilia Crocodylidae Brachychampsa sp. ? Brachychampsa sp. Leidyosuchus sp. ? Thoracosaurus sp. indet Saurischia Ornithomimidae cf. Ornithomimus sp. indet Dromaeosauridae indet Troodontidae indet Tyrannosauridae ? Albertosaurus libratus? Albertosaurus sp. n. gen. et sp.

Ornithischia Nodosauridae indet Ankylosauria indet Pachycephalosauridae indet Ceratopsidae Pentaceratops sternbergii indet Hypsilophodontosauridae?Thescelosaurus sp. Hadrosauridae Kritosaurus navajovius Parasaurolophus cyrtocristatus ? Corythosaurus sp. Reptilia incertae sedis egg-shell fragments Mammalia Multituberculata Neoplagiaulacidae Mesodma sp. ? Mesodma sp. ?new genus and species? Neoplagiaulacidae Cimexomys cf. C. judithae Ptilodontidae Mesodma cf. M. senecta cf. Kimbetohia campi? Ptilodontidae Mesodma n. sp. or Cimexomys cf. C. antiquus Cimolodontidae Cimolodon electus Cimolodon n. sp. near C. nitidus Cimolodon sp. cf. Cimolodon sp. Eucosmodontidae new genus and species cf. Eucosmodontidae n. gen. et sp. Cimolomyidae Meniscoessus intermedius cf. Essonodon n. sp.? Essonodon sp. Family incertae sedis Paracimexomys judithae Paracimexomys n. sp.? Essonodon sp. indet Metatheria Didelphidae Alphadon halleyi Alphadon parapraesagus Alphadon cf. A. wilsoni Alphadon cf A. marshi Alphadon n. sp. A Alphadon n. sp. B cf. Peradectes sp. Ectocentrocristus foxi Pediomyidae Pediomys fassetti Pediomys cf. P. cooki Aquiladelphis paraminor Stagodontidae cf. Eodelphis sp. Eutheria Leptictidae ? Gypsonictops clemensi Gypsonictops cf. G. lewisi Gypsonictops n. sp. Palaeoryctidea Cimolestes lucasi cf. Cimolestes sp. ? Nyctitheriidae Paranyctoides cf. P. sternbergii Eutheria incertae sedis indet

TABLE 7. Vertebrate fauna of the Naashoibito Member of the Kirtland For ­

mation from Brown (1910), Hay (1908, 1910), Gilmore (1916, 1919. 1922). Wiman (1931, 1933), Mateer (1976), Kues et al. (1977), Lehman (1981, 1984, 1985), Lucas et al. (1987) and this paper.

Chondrichthyes

Osteichthyes

Selachii

Lepisosteidae Atractasteus sp. Cyprinidae indet Reptilia Testudines Baenidae " Baena " nodosa Thescelius insiliens Neurankylus eximius Compsemys sp. Trionychidae Aspideretes vorax Aspideretes fontanus Aspideretes austerus Dermatemydidae Adocus vigoratus Basilemys nobilis Holplochelys cf. H. bicarinata Crocodilia Goniopholididae Goniopholis sp. Crocodylidae indet Saurischia Ornithomimidae indet Dromaeosauridae indet Tyrannosauridae ? Albertosaurus sp. cf. Tyrannosaurus sp. Saurornithoididae indet Sauropodomorpha Titanosauridae Alamosaurus sanjuanensis Ornithischia Ankylosauridae indet Nodosauridae ? Panoplosaurus sp. indet Ankylosauria indet Ceratopsidae Torosaurus cf. Torosaurus latus indet Hadrosauridae Edmontosaurus saskatchewanensis Parasaurolophus tubicen indet Mammalia Multituberculata Neoplagiaulacidae Mesodma formosa Cimolomyidae Essonodon browni cf. Meniscoessus sp. Metatheria Didelphidae Alphadon marshi Alphadon sp.

Squatirhinidae

indet

Batoidea

Dasyatidae

Myledaphus sp.

Osteichthyes

Amiiformes

Amiidae

? Amia chauliodeia

Melvius thomasi

Lepidosteiformes

Lepisosteidae

Atractasteus occidentalis Atractasteus sp.

Reptilia

Testudines

Baenidae

" Baena " nodosa

" Baena " ornata

" Baena " sp.

Boremys pulchra

Neurankylus eximius

Thescelus insiliens

Dermatemydidae

Adocus bossi

Adocus kirtlandius

Basilemys nobilis

Trionychidae

Aspideretes ovatus

Aspideretes vorax

Plastomenus robustus

Plastomenus sp.

Platypeltis sternbergi

Crocodilia

Goniopholidae

Goniopholis kirtlandicus Crocodylidae

Brachychampsa sp.

Leidyosuchus sp.

? Thoracosaurus sp.

Saurischia

Ornithomimidae

cf. Struthiomimus sp. Dromaeosauridae

indet

Tyrannosauridae

Albertosaurus sp.

Aublysodon cf. A. mirandus

Ornithischia

Nodosauridae

?Euplocephalus sp.

indet

Ankylosauria

indet

Ceratopsidae

cf. Chasmosaurus sp.

Pentaceratops fenestratus Hadrosauridae

Kritosaurus navajovius Parasaurolophus sp.

Mammalia

Multituberculata

Neoplagiaulacidae

Mesodma formosa

Cimolomyidae

cf. Meniscoessus sp.

Metatheria

Didelphidae

Alphadon marshi

with the publication of two important books (Weishampel et al .. 1990; Carpenter and Currie. 1990). Thus, we briefly review some aspects of the faunas and describe some recently collected specimens. Unfortunately, the recent literature lacks species-level revisions of some of the most important taxa, notably the Hadrosauridae , Ceratopsidae and Tyrannosauridae .