Apparently my Google-fu is good.
Previously, I reported what was at the time a generally known, but relatively undiscussed subject: The name Ingenia is known for two animals, a nematode named by Sebastian A. Gerlach in 1957, and an oviraptorid named by Barsbold Rinchen in 1981. The ICZN mandates that in occasions like this, the oldest established name has priority (Art. 23). On the chance that it might not be effectively useful, but also to find the citation, I came across several papers that have used Ingenia mirabilis Gerlach, 1957 in faunal listings for tidal zone samplings, in which case some of these span from the late 50s through to the last decade.
Barsbold also named the taxon Ingeniinae (as a subfamily within Oviraptoridae). No higher-rank taxon has been named for Ingenia Gerlach, which means Ingeniinae is the only higher-rank taxon that contains either version of Ingenia. The ICZN similarly mandates that the family-rank name including a junior homonym is “invalid” (Art. 39), and must be replaced by the next available name. Because the ICZN also qualifies that the author of a name in the family group simultaneously coins all names in the family group (superfamily, subfamily, etc.) (Art. 36.1), Barsbold’s Ingeniidae and Ingeniinae are effectively dated 1981, even though he explicitly coined the former in 1986, and would then be replaced by either variation of Oviraptoridae (Barsbold, 1976) or Conchoraptorinae (Barsbold, 1986), both of which have comparable endings to the other; the former would be the best replacement if any were required.
Because oviraptorid systematics are very, very much unresolved under most analyses, with general conclusions merely linking Khaan mckennai and Conchoraptor gracilis, and “Ingenia” yanshini with Heyuannia huangi within a larger “subfamily” within Oviraptoridae opposed by the crested taxa (e.g., Xu et al. 2011), it should likely be better to leave the nodes unnamed until such a time more comprehensive relationships can be determined (such as the placement of Machairasaurus leptonychus, Banji long, etc., and the odd finding of crested and Citipati-like Nemegtomaia barsboldi with the crestless oviraptorids, especially yanshini, due to an undescribed yanshini-like manus).
Anyways, after much hunting, I found the reference in which the original Ingenia was named, forcing a new name to be chosen for Ingenia Barsbold (that reference is below, Gerlach, 1957).
Edit: A new name has now been established for “Ingenia” yanshini, Ajancingenis yanshini (via Easter, 2013), thus removing the error this name provides.
Barsbold R. 1981. Беззубйе жыщнйе динозаврй Монголий (Edentulous carnivorous dinosaurs of Mongolia). Трудй – Совместная Совестко-Монгольской Палеотологыческая Зкспедитсия — Joint Soviet-Mongolian Paleontological Expedition, Transactions 15: 28-39, 124. (in Russian, w/ English summary)
Barsbold R. 1986. Raubdinosaurier Oviraptoren [The robbing dinosaurs -- oviraptors]. pg. 210-223 in Vorob’yeva (ed.) Herpetologische Untersuchungen in der Mongolischen Volksrepublik [Herpetological investigations from the People's Republic of Mongolia]. (Akademia Nauk, SSSR, Moscow.) (in Russian, /w German & English abstract)
Gerlach, S. A. 1957. Marine Nematoden aus dem Mangroven-Gebiet von Cananéia. Brasilianische Meeres-Nematoden III. [Marine nematodes from the mangrove area of Cananéia. Brazilian marine nematodes III.]. Abhandlungen der Mathematisch-Naturwissenschaftlichen Klasse. Akademie der Wissenschaften und der Literatur in Mainz — Transactions of the Mathematical-Scientific Section, Academy of Sciences and Literature in Mainz 5:129-176. (in German)
Xu X., You H.-l., Du K. & Han F.-l. 2011. An Archaeopteryx-like theropod from China and the origin of Avialae. Nature 475:465-470.