Theriotia shanxiensis (S.Q.Xie & Y.Z.Qi) Kociolek, Q.M.You, J.Stepanek, R.L.Lowe & Q.X.Wang

Kusber, Wolf-Henning & Williams Botanischer Garten Berlin, David M., 2025, The disappearance of Theriotia Kociolek, Q. M. You, J. Stepanek, R. L. Lowe & Q. X. Wang after 24 days: a nomenclatural evaluation and advice for authors and editors, Notulae Algarum 370, pp. 1-4 : 2-4

Theriotia shanxiensis (S.Q.Xie & Y.Z.Qi) Kociolek, Q.M.You, J.Stepanek, R.L.Lowe & Q.X.Wang [12 Sept] 2016 in Phycological Research initially without volume, page 3 of 7 pages.

Comment: This combination was validly published with a full and direct reference to the basionym.

“ Edtheriotia ” Kociolek, Q.M.You, J.Stepanek, R.L.Lowe & Q.X.Wang [05 Oct] 2016 in Phycological Research initially without volume, page 2 of 7. This designation was published in Kociolek (2016b) and later in print as Kociolek & al. (2016c: 275).

Comment: The authors intended “ Edtheriotia ” to be the effectively published, valid, legitimate, and the correct name for the illegitimate Theriotia in Kociolek (2016a); see above. Because “ Edtheriotia ” was not published in a subsequent publication, but as an alteration in the same publication, this intended nomenclatural act was not effectively published, neither in the corrected electronic version, nor in the printed volume (ICN Art. 30.4, Turland & al. 2025).

“ Edtheriotia guizhoiana ” Kociolek, Q.M.You, J.Stepanek, R.L.Lowe & Q.X.Wang [12 Sept] 2016 in Phycological Research initially without volume, page 3 of 7 pages, figs 1-26.

Comment: Because of ICN Art. 30.4 ( Turland & al. 2025), the intended species name and type of “ Edtheriotia ” were not effectively published .

“ Edtheriotia shanxiensis ” Kociolek, Q.M.You, J.Stepanek, R.L.Lowe & Q.X.Wang [05 Oct] 2016 in Phycological Research without volume, page 3 of 7 pages.

Comment: Because of ICN Art. 30.4 ( Turland & al. 2025), the intended combination was not effectively published.

We conclude that Kociolek & al. (2016b, c) intended to provide a replacement name for Theriotia Kociolek, Q.M.You, J.Stepanek, R.L.Lowe et Q.X.Wang , nom. illeg., not Cardot 1904 with inclusion for a newly described species as its type and adding a recombined species. Thus, the final treatment of the genus requires an effective publication of the respective nomenclatural acts that will be published in a subsequent paper by Kociolek & al.

Conclusion for publishers: It is strongly recommended that nomenclatural novelties and nomenclatural acts published in error be corrected in a subsequent publication, either as a PDF or as a printed note. Further, publishers should archive the version of record, as well as the publications with the incorrect information.

Conclusion for nomenclatural authors: The requirements for new combinations and replacement names for the full and direct reference to a basionym or replaced synonym is challenging in case the first effective electronical publication of an PDF, known as the ‘version of record’ is not now available. Missing page numbers or pagination differing from the final and/or printed paper as well as missing volume number in the version of record are issues that can be tackled citing the full and direct reference supplemented by “published in print as [followed by the full and direct reference to the printed issue]”.

Conclusion for data management: Registration of novelties and nomenclatural acts are a place to keep the data of the version of record. PhycoBank (http://phycobank.org) aims to keep track of these nomenclatural details important for nomenclature by annotating these as a service to nomenclature and thereby to taxonomy.

Cardot, J. (1904). Première contribution à la flore bryologique de la Corée. Beihefte zum Botanischen Centralblatt 17: 1–44.

Kociolek, J.P., You, Q., Stepanek, J.G., Lowe, R.L. & Wang, Q. (2016 a [12 Sep 2016]). New freshwater diatom genus, Theriotia gen. nov. of the Stephanodiscaceae (Bacillariophyta) from south-central China. Phycological Research without volume: 1–7.

Kociolek, J.P., You, Q., Stepanek, J.G., Lowe, R.L. & Wang, Q. (2016 b [05 Oct 2016]). New freshwater diatom genus, Edtheriotia gen. nov. of the Stephanodiscaceae (Bacillariophyta) from south-central China. Phycological Research without volume: 1–7.

Kociolek, J.P., You, Q., Stepanek, J.G., Lowe, R.L. & Wang, Q. (2016 c). New freshwater diatom genus, Edtheriotia gen. nov. of the Stephanodiscaceae (Bacillariophyta) from south-central China. Phycological Research 64: 274–280.

McNeill, J., Barrie, F.R., Bruck, W.R., Demoulin, V., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Marhold, K., Prado, J., Prud’homme van Reine, W.F., Smith, G.F. & Turland, N.J. (2012). International Code of Nomenclature for algae, fungi, and plants (Melbourne Code). Regnum Vegetabile, Vol. 154. pp. [i]– xxx, 1–208. Königstein: Koeltz Scientific Books.

Turland, N.J., Wiersema, J.H., Barrie, F.R., Gandhi, K.N., Gravendyck, J., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Klopper, R.R., Knapp, S., Kusber, W.-H., Li, D.-Z., May, T.W., Monro, A.M., Prado, J., Price, M.J., Smith, G.F. & Señoret, C.Z. (2025). International Code of Nomenclature for algae, fungi, and plants (Madrid Code). Regnum Vegetabile, Vol. 162. pp. [i]–xlvii, 1–288. Chicago: The University of Chicago Press.

Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.-H., Li, D.-Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F., editors (2018). International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile, Vol. 159. pp. [i]– xxxviii, 1–253. Glashütten: Koeltz Botanical Books.

Xie, S.-Q. & Qi, Y.-Z. (1984). Light, scanning and transmission electron microscopic studies on the morphology and taxonomy of Cyclotella shanxiensis sp. nov. In: Proceedings of the Seventh International Diatom Symposium; Philadelphia, 22–27 Aug 1982 (Mann, D.G. Ed.). Koenigstein: Otto Koeltz Science Publishers, pp. 185–196.