Here, we provide updates to our recent paper reviewing the taxonomy and nomenclature of the Eastern ratsnakes (Pantherophis obsoletus complex, Colubridae, Serpentes). Specifically, we clarify that Coluber alleghaniensis Holbrook, 1836 is a subjective, rather than objective, senior synonym of Elaphis holbrookii Duméril, Bibron & Duméril, 1854. Contrary to our statement that USNM 1733–4 were syntypes of Scotophis lindheimerii Baird & Girard, 1853, the former is the holotype and the latter is the paratype. The holotype is lost and the paratype is in poor condition, but no neotype designation is warranted at present. We note that USNM 248870, which we designated as the lectotype of Coluber obsoletus lemniscatus Cope, 1888, was originally cataloged as USNM 4710. This catalog number was shared with the type of the salamander Amblystoma tenebrosum Baird & Girard, 1852, and the snake was re-cataloged as USNM 248870 in 1985. Finally, we originally treated C. reticulatus La Cépède, 1789 and C. reticularis Daudin, 1803 as senior subjective synonyms of C. corais Boie, 1827, but here corroborate recent authors in designating it a senior subjective synonym of C. obsoletus Say in James, 1823. As the Commission suppressed C. reticulatus La Cépède, 1789 (an exoplonym), this subsequently rendered C. reticularis Daudin, 1803 (an exoploneonym) unavailable as well.
Anonymous [International Commission on Zoological Nomenclature] (1987) Opinion 1463. De Lacépède, 1788–1789, Histoire Naturelle des Serpens and later editions: rejected as a non-binominal work. Bulletin of zoological Nomenclature, 44 (4): 265–267.
Anonymous [International Commission on Zoological Nomenclature] (1999) International code of zoological nomenclature. Fourth edition. London (International Trust for zoological Nomenclature): i–xxix + 1–306. <https://doi.org/10.5962/bhl.title.50608>.
Axtell, R. W. (1981) Holbrookia propinqua: type specimens, collector, his route, and restriction of locality, with comments on Baird’s ‘Reptiles of the Boundary’ as an important taxonomic reference. Journal of Herpetology, 15 (2): 211–217. <https://doi.org/10.2307/1563383>.
Baird, S. F. (1859) Reptiles of the Boundary. In: W. H. Emory, Report on the United States and Mexican boundary survey made under the direction of the Secretary of the Interior, 2 (2), Washington, D.C.: 1‒35, pl. 1‒41.
Baird, S. F. & Girard, C. (1852) Descriptions of new species of Reptiles, collected by the U.S. Exploring Expedition under the command of Capt. Charles Wilkes, U.S.N., First Part—including the species from the western part of America. Proceedings of the Academy of natural Sciences of Philadelphia, 6: 174–177.
Baird, S. F. & Girard, C. (1853) Catalogue of North American Reptiles in the Museum of the Smithsonian Institution. Part 1. Serpents. Washington (Smithsonian Institution): i-xvi + 1-172. <https://doi.org/10.5962/bhl.title.5513>.
Boie, F. (1827) Bemerkungen über Merrem’s Versuch eines Systems der Amphibien. 1te Lieferung, Ophidier. Isis von Oken, 20 (6): 508–566.
Burbrink, F. T., Pyron, R. A., Gehara, M. C., McKelvy, A. D. & Myers, E. A. (2021) The corrected taxonomic history of the North American ratsnakes (Pantherophis obsoletus complex). Herpetological Review, 53: 537–547.
Cochran, D. M. (1961) Type specimens of Reptiles and Amphibians in the U.S. National Museum. Bulletin of the United States national Museum, 220: 1–291. <https://doi.org/10.5479/si.03629236.220>.
Cope, E. D. (1888) On the snakes of Florida. Proceedings of the United States national Museum, 11: 381–394. <https://doi.org/10.5479/si.00963801.11-727.381>.
Cope, E. D. (1900) The crocodilians, lizards, and snakes of North America. In: Report of the U. S. national Museum under the direction of the Smithsonian Institution, for the year ending June 30, 1898, ‘1898’: 153–1294, pl. 1‒36.
Daudin, F. M. (1803) Histoire naturelle, générale et particulière, des Reptiles. Volume 6. Paris (F. Dufart): 1–447, pl. 71–80.
Dowling, H. G. (1952) A taxonomic study of the ratsnakes, genus Elaphe Fitzinger. IV. A check list of the American forms. Occasional Papers of the Museum of Zoology, University of Michigan, 541: 1–12.
Dubois, A., Frétey, T., Lorvelec, O. & Ohler, A. (2021) The nomenclatural status of the amphibian and reptile nomina introduced by La Cepède in his Histoire Naturelle des Quadrupèdes Ovipares et des Serpens, with comments on various questions of zoological nomenclature. Bionomina, 23: 1–180. <https://doi.org/10.11 646/bionomina.23.1.1>.
Dubois, A., Nemésio, A. & Bour, R. (2014) Primary, secondary and tertiary syntypes and virtual lectotype designation in zoological nomenclature, with comments on the recent designation of a lectotype for Elephas maximus Linnaeus, 1758. Bionomina, 7: 45–64. <https://doi.org/10.11646/bionomina.7.1.2>.
Duméril, A.-M.-C., Bibron, G. & Duméril, A. H. A. (1854) Erpétologie générale ou Histoire naturelle complète des Reptiles. Tome 7, partie 1. Paris (Librairie Encyclopédique de Roret): i–vii + [i–iv] i–xvi + 1–780. <https://doi.org/10.5962/bhl.title.118797>.
Fowler, H. W. (1963) Special anniversary features: Cope in retrospect. Copeia, 1963 (1): 195‒198. <https://doi.org/10.2307/1441319>.
Holbrook, J. E. (1836) North American herpetology: or, A description of the Reptiles inhabiting the United States. Vol. 1. Philadelphia (J. Dobson): 120, pl. 1‒23. <https://doi.org/10.5962/bhl.title.4682>.
James, E. (1823) Account of an expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819 and ’20, by order of the Hon. J. C. Calhoun, Sec’y of War, under the command of Major Stephen H. Long. From the notes of Major Long, Mr. T. Say, and other gentlemen of the exploring party. Volume 1. Philadelphia (H. C. Carey and I. Lea): [i–iii] + 1–8 + 1–503. <https://doi.org/10.5962/bhl.title.61116>.
La Cépède, [B.-G.-É. de la Ville], de (1789) Histoire naturelle des serpens. [In-quarto]. Tome 2. Paris (Hôtel de Thou): [i] + 1–8 + 1–19 + [i] + 1–144 + 1–527, pl. 1–22.
Malnate, E. V. (1971) A catalog of primary types in the herpetological collections of the Academy of Natural Sciences, Philadelphia (ANSP). Proceedings of the Academy of natural Sciences of Philadelphia, 123: 345–375.
McCranie, J. R. (1980) Drymarchon, D. corais. Catalogue of American Amphibians and Reptiles, 267:1–4.
Wallach, V., Williams, K. L. & Boundy, J. (2014) Snakes of the world. A catalogue of living and extinct species. London & New York (CRC Press): i–xxvii + 1–1209. <https://doi.org/10.1201/b16901-2>.
Yarrow, H. C. (1882) Check list of North American Reptilia and Batrachia with catalogue of specimens in US National Museum. Bulletin of the United States national Museum, 24: i–v + 1‒249. <https://doi.org/10.5479/si.03629236.24.1>.