Discovery of the primary aphid (Hemiptera: Aphidomorpha) and scale insect (Hemiptera: Coccomorpha) type specimens from the collection of Theodor Hartig (1805 - 1880) Author Brunet, Bryan M. T. 0000-0001-5083-9662 Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, 960 Carling Avenue, Ottawa, Ontario K 1 A 06 C, & bryan. brunet @ agr. gc. ca; https: // orcid. org / 0000 - 0001 - 5083 - 9662 bryan.brunet@agr.gc.ca Author Raupach, Michael J. 0000-0001-8299-6697 Sektion Hemiptera, Bavarian State Collection of Zoology (SNSB - ZSM), Münchhausenstrasse 21, 81247 München, Germany. raupach @ snsb. de; https: // orcid. org / 0000 - 0001 - 8299 - 6697 raupach@snsb.de Author Rehage, Heinz-Otto 0009-0005-2193-2362 LWL-Museum für Naturkunde mit Planetarium, Sentruper Strasse 285, 48161 Münster, Germany. https: // orcid. org / 0009 - 0005 - 2193 - 2362 Author Havill, Nathan P. United States Department of Agriculture - Forest Service, Northern Research Station, 51 Mill Pond Road, Hamden, Connecticut Author Foottit, Robert G. 0000-0001-6957-2092 Agriculture and Agri-Food Canada, Ottawa Research and Development Centre, 960 Carling Avenue, Ottawa, Ontario K 1 A 06 C, & robert. foottit @ agr. gc. ca; https: // orcid. org / 0000 - 0001 - 6957 - 2092 robert.foottit@agr.gc.ca text Zootaxa 2023 2023-11-08 5369 1 89 116 https://www.mapress.com/zt/article/download/zootaxa.5369.1.4/52230 journal article 277843 10.11646/zootaxa.5369.1.4 48ea385d-2039-4ace-b1b0-cf3a2931233e 1175-5326 10144745 B0A58448-FE3B-4F2A-B876-E6EE2D95A89F Aphis spinarum Hartig, 1841 Aphis spinarum Hartig, 1841: 370 . SYNTYPES : 14 (150 [8.04] lost; 1226 [8.05], 3 lost), Prunus spinosa . Hyalopterus pruni ( Geoffroy, 1762 ) (senior synonym—Börner, 1952: 68). Valid Specimens. Six pointed on a single pin (150) with leaf tissue collected from Prunus spinosa in 1840. All specimens lost. Note that the leaf tissue appears to be coated in white powdery mildew, as described in Hartig (1841) .An additional eight pointed specimens on a single pin collected in 1839 (1226). Three specimens are lost, and the rest are nymphs. Remarks. Börner (1952) treated Aphis spinarum Hartig, 1841 as a synonym of Hyalopterus pruni ( Geoffroy, 1762 ) , and Favret et al. (2017) reaffirmed this on the basis of host-association. Unfortunately, all specimens that were clearly associated with Prunus spinosa , as determined by Hartig’s notes, have been lost with the exception of pinned host tissue (150) that appears to contain traces of a waxy residue and possibly aphid exuviae. The only remaining type specimens (1226) associated with the A. spinarum label are clearly not H. pruni , and while they appear to belong to the Macrosiphini , their exact identity is yet to be determined. Hartig wrote that they were observed feeding together around the peduncles of their host plant, but the host itself was not identified.