Arthropods Insects Name Novelty Status Authors Age Unit Location Notes Images Parastylotermes Gen. 4 comb nov valid Snyder & Emerson Ypresian-Miocene Latah Formation A Stylotermitid termite genus. The type species is Stylotermes washingtonensis Also includes S. calico, S. frazieri, & S. robustus. Ulmeriella latahensis Sp nov. Valid Snyder Miocene Latah Formation A harvester termite
Archosauromorphs
Archosauromorphs Name Novelty Status Authors Age Location Notes Images Elachistosuchus Gen et sp nov valid Janensch Late Triassic (Norian) * A neodiapsid reptile.
Plesiosaurs Plesiosaur gastroliths documented.Welles and Bump (1949). Sanders, Manley, and Carpenter (2001), "Table 12.1" page 167.
Synapsids Non-mammalian
Name Status Authors Age Location NotesImagesAneugomphius Jr. Synonym of Theriognathus. Broom and Robinson Wuchiapingian Homodontosaurus Valid Broom Wuchiapingian A therocephalian Lemurosaurus Valid Broom Wuchiapingian * A biarmosuchian Myosauroides Valid Broom Wuchiapingian A dicynodont
Other animals Name Novelty Status Authors Age Location Notes Images Cyclomedusa gigantea Sp. nov. Sprigg Ediacaran A member of the genus Cyclomedusa.
Considered a probable junior synonym of Aspidella terranovica by Gehling, Narbonne & Anderson (2000) and Ivantsov & Zakhrevskaya (2025). Cyclomedusa radiata Sp. nov. Sprigg Ediacaran A member of the genus Cyclomedusa.
Considered a probable junior synonym of Aspidella terranovica by Gehling, Narbonne & Anderson (2000) and Ivantsov & Zakhrevskaya (2025). Dickinsonia minima Sp. nov. Junior synonym Sprigg Ediacaran A member of the genus Dickinsonia. Synonym of Dickinsonia costata. Magdiana Gen. et sp. nov. Junior homonym Sprigg Ediacaran A discoid fossil, originally described as a jellyfish of unknown affinity. The type species is M. annulata. Southcott (1958) coined a replacement name Spriggia.
Considered a probable junior synonym of Aspidella terranovica by Gehling, Narbonne & Anderson (2000) and Ivantsov & Zakhrevskaya (2025). Medusina asteroides Sp. nov. Sprigg Ediacaran A discoid fossil, originally described as a jellyfish of unknown affinity. Transferred to the genus Medusinites by Glaessner & Wade (1966).
Considered a probable junior synonym of Aspidella terranovica by Ivantsov & Zakhrevskaya (2025). Medusina filamentus Sp. nov. Junior synonym Sprigg Ediacaran A discoid fossil, originally described as a jellyfish of unknown affinity. Placed in synonymy with Pseudorhizostomites howchini by Glaessner & Wade (1966). Medusina mawsoni Sp. nov. Junior synonym Sprigg Ediacaran A discoid fossil, originally described as a jellyfish of unknown affinity. Transferred to the genus Medusinites and placed in synonymy with Medusinites asteroides by Glaessner & Wade (1966).
Considered a probable junior synonym of Aspidella terranovica by Ivantsov & Zakhrevskaya (2025). Protodipleurosoma Gen. et sp. nov. Junior synonym Sprigg Ediacaran A discoid fossil, originally described as a hydrozoan jellyfish in the order Leptothecata. Synonym of Ediacaria. The type species is P. wardi.
Considered a probable junior synonym of Aspidella terranovica by Gehling, Narbonne & Anderson (2000) and Ivantsov & Zakhrevskaya (2025). Protoniobia Gen. et sp. nov. Sprigg Ediacaran A discoid fossil, originally described as a hydrozoan jellyfish in the order Anthoathecata. The type species is P. wadea.
Considered a probable junior synonym of Aspidella terranovica by Ivantsov & Zakhrevskaya (2025). Pseudorhizostomites Gen. et sp. nov. Sprigg Ediacaran A discoid fossil, originally described as a scyphozoan jellyfish in the order Rhizostomeae. The type species is P. howchini. Pseudorhopilema Gen. et sp. nov. Junior synonym Sprigg Ediacaran A discoid fossil, originally described as a scyphozoan jellyfish in the order Rhizostomeae. Synonym of Pseudorhizostomites. The type species is P. chapmani. Tateana Gen. et sp. nov. Sprigg Ediacaran A discoid fossil, originally described as a scyphozoan jellyfish in the order Semaeostomeae. The type species is T. inflata.
Considered a probable junior synonym of Aspidella terranovica by Gehling, Narbonne & Anderson (2000) and Ivantsov & Zakhrevskaya (2025).
References
Welles, Samuel P. and Bump, J. D.; 1949; Alzadasaurus pembertoni, a new elasmosaur from the Late Cretaceous of South Dakota; Journal of Paleontology; 23(5) pp. 521–535 Sanders F, Manley K, Carpenter K. Gastroliths from the Lower Cretaceous sauropod Cedarosaurus weiskopfae. In: Tanke D.H, Carpenter K, editors. Mesozoic vertebrate life: new research inspired by the paleontology of Philip J. Currie. Indiana University Press; Bloomington, IN: 2001. pp. 166–180.