1954 in paleontology explained

Plants

Angiosperms

Name	Novelty	Status	Authors	Age	Unit	Location	Notes	Images
Amyridoxylon^[1]	Gen et sp nov		Kruse	Early Eocene	Green River Formation		A rutaceous petrified wood. The type species is A. ordinatum
Aspidospermoxylon	Gen et sp nov		Kruse	Early Eocene	Green River Formation		An apocynaceous petrified wood. The type species is A. uniseriatum
Chandlera^[2]	Gen et sp nov	valid	Scott	Middle Eocene	Clarno Formation	United States	A moon seed genus. Type species C. lacunosa.
Edenoxylon	Gen et sp nov		Kruse	Early Eocene	Green River Formation		An anacaridaceous petrified wood. The type species is E. parviareolatum
Fagara biseriata	Sp nov		Kruse	Early Eocene	Green River Formation		A rutaceous petrified wood.
Fagara monophylloides	Sp nov		Kruse	Early Eocene	Green River Formation		A rutaceous petrified wood.
Forchhammerioxylon	Gen et sp nov		Kruse	Early Eocene	Green River Formation		A resedaceous petrified wood. The type species is F. scleroticum
Heveoxylon	Gen et sp nov		Kruse	Early Eocene	Green River Formation		A euphorbiaceous petrified wood. The type species is H. microporosum
Juglans clarnensis	Sp nov	valid	Scott	Middle Eocene	Clarno Formation	United States	A walnut.
Mastixioidiocarpum oregonense	Gen et sp nov	valid	Scott	Middle Eocene	Clarno Formation	United States	A Tupelo relative
Myrica scalariformis	Sp nov	jr synonym	Kruse	Early Eocene	Green River Formation		An Eden Valley petrified wood. Moved to Morella scalariformis in 2021^[3]
Odontocaryoidea	Gen et sp nov	valid	Scott	Middle Eocene	Clarno Formation	United States	A moon seed genus. Type species O. nodulosa.
Palaeonyssa spatulata	sp nov	jr synonym	Scott	Middle Eocene	Clarno Formation	United States	A Tupelo, moved to Nyssa spatulata in 1994
Palaeophytocrene hancockii	Sp nov	valid	Scott	Middle Eocene	Clarno Formation	United States	An icacinaceous species.
Palaeophytocrene pseudopersica	Sp nov	valid	Scott	Middle Eocene	Clarno Formation	United States	An icacinaceous species.
Parthenocissus angustisulcata	Sp nov	valid	Scott	Middle Eocene	Clarno Formation	United States	A vitaceous species
Schinoxylon	Gen et sp nov		Kruse	Early Eocene	Green River Formation		An anacaridaceous petrified wood. The type species is S. actinoporosum
Suriana inordinata	Sp nov		Kruse	Early Eocene	Green River Formation		A surianaceous petrified wood.
Talauma multiperforata	Sp nov		Kruse	Early Eocene	Green River Formation		An Eden Valley petrified wood.
Trochodendroxylon beckii^[4]	Sp nov	valid	Hergert & Phinney	Middle Eocene	Clarno Formation	United States	A Trochodendron wood species. Moved to Trochodendron beckii in 1982

Arthropods

Insects

Archosauromorphs

Dinosaurs

Data courtesy of George Olshevsky's dinosaur genera list.^[7]

Name	Status	Authors		Age	Unit	Location	Notes	Images
Mamenchisaurus^[8]	Valid taxon	Yang Zhongjian (as Young C. C.)		Late Jurassic (late Callovian-early Oxfordian)	Shangshaximiao Formation		A mamenchisaurid. The type species is M. constructus. This animal had a neck of more than 10 meters.
Rebbachisaurus^[9]	Valid taxon	René Lavocat		Middle Cretaceous (Albian-Cenomanian)	Kem Kem Beds		A rebbachisaurid.
Therizinosaurus^[10]	Valid taxon	Evgeny Maleev		Late Cretaceous (late Campanian-early Maastrichtian)	Nemegt Formation		A therizinosaurid.

Synapsids

Eutherians

Cetaceans

Name	Status	Authors	Age	Unit	Location	Notes	Images
Leptodelphis	Valid	Kirpichnikov	Middle Miocene (Sarmatian)			A member of Kentriodontidae.
Sarmatodelphis	Valid	Kirpichnikov	Middle Miocene (Sarmatian)			A kentriodontid.

References

1. Kruse . H.O. . Some Eocene dicotyledonous woods from Eden Valley, Wyoming . Ohio Journal of Science . 1954 . 54 . 4 . 243–244.
2. Manchester . S.R. . Fruits and Seeds of the Middle Eocene Nut Beds Flora, Clarno Formation, Oregon . 1994 . Palaeontographica Americana . 58 . 30–31.
3. Wheeler . E. A. . Baas . P. . Manchester . S. R. . 2021 . Wood Anatomy of Modern and Fossil Fagales in Relation to Phylogenetic Hypotheses, Familial Classification, and Patterns of Character Evolution . International Journal of Plant Sciences . 183 . 1 . 61–86 . 10.1086/717328 . 244081754 . free .
4. Scott . R. A. . Wheeler . E. A. . 1982 . Fossil woods from the Eocene Clarno Formation of Oregon . IAWA Journal . 3 . 3-4 . 135-154 . 10.1163/22941932-90000829. free .
5. Snyder . T.E. . 1955 . A new fossil termite, Parastylotermes frazieri, from California (Isoptera, Rhinotermitidae) . Proceedings of the Entomological Society of Washington . 57 . 2 . 79–80 .
6. Ein Parasuchier-Schädelrest aus dem Oberen Burgsandstein von Coburg [A parasuchian skull remain from the Upper Burgsandstein of Coburg]. Geologisch Blätter für Nordost-Bayern 3:1-13
7. Web site: Olshevsky . George . Dinogeorge's Dinosaur Genera List . 2008-08-07 . 2011-07-15 . https://web.archive.org/web/20110715102453/http://www.polychora.com/dinolist.html . dead .
8. Young C.-C. 1954. On a new sauropod fromYiping. Szechuan, China. Acta Palaeontol. Sinica2: pp. 355-369.
9. [René Lavocat]
10. Maleev, E.A. 1954. A new turtle-like saurian inMongolia. Priroda (1954): pp. 106-108.