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Taxon: Genus †"Archaeoraptor" Czerkas, 1999, nom. ined. (dinosaur) [unverified]
 Entity: 

Authorship

SN2000 author citation:  S.[A.] Czerkas, in C.P. Sloan, 1999, nom. ined.
Original name, rank & spelling:  Sloan, C.P. 1999. Natl. Geogr. 196 (5): 100 ("Stephen Czerkas"), 102 ("he will later name"). ≡
Subsequent publication:  Olson, S.L. 2000. Backbone 13 (2): 1 ("available for purposes of nomenclature ..., with Sloan as its author.").
Source for the authorship:  Olshevsky, G. (comp.) 2000-2021.: 12 Jun 2021 ("Czerkas vide C. P. Sloan, 1999 vide Olson, 2000").

Attributes

Disclaimed name/act (nom. ined.) [ICZN, 1999: Art. 8.3] Ref: Wikimedia, 2001-present: Archaeoraptor, 15 Sep 2025 ("By that time the November issue of National Geographic was already in preparation for printing, but "Archaeoraptor" was never formally published in any peer-reviewed journal.", "Sloan used the name "Archaeoraptor liaoningensis" but with a disclaimer (so that it would not count as a nomenclatural act for the purposes of scientific classification) in anticipation of Czerkas being able to publish a peer-reviewed description at some point in the future.").
Nomen nudum (nom. nud.) [ICZN, 1999: Arts. 12 [before 1931], 13 [after 1930], G] Ref: G. Olshevsky (comp.), 2000-2021: 12 Jun 2021 ("nomen nudum"). [composite].
Not explicitly new (nom. inval.) [ICZN, 1999: Art. 16.1 (>1999)] Ref: Wikimedia, 2001-present: Archaeoraptor, 15 Sep 2025 ("Olson presumed that the National Geographic article had already validly named the fossil, and he, therefore, failed to explicitly indicate the name was new"). ≡

Synonyms

Accepted name (objective): †Microraptor (Genus) Xu X., Zhou Z. & Wang X.L., 2000 Ref: G. Olshevsky (comp.), 2000-2021: 12 Jun 2021 ("JOS"); PBDB(26 Jul 2015).
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Last updated: 28 Aug 2026