o:8810 First Record of Petrobia (Tetranychina) harti (Ewing, 1909) (Acari: Tetranychidae) in Serbia, with Additional Remarks en Abstract: The species Petrobia (Tetranychina) harti (Ewing, 1909) is reported for the first time in Serbia, also representing the first record of the tribe Petrobiini Reck, 1952 in the country. Including this finding, the number of spider mite species recorded in Serbia now totals 45. This spider mite species was found exclusively on wood-sorrel plants, Oxalis corniculata L. and O. articulata Savigny., at several localities in the cities of Belgrade and Zrenjanin. The samples were collected during the growing season of 2018 and 2023. Identification of the oxalis mite was based on morphological characteristics. To date, the occurrence of P. (T.) harti on other host plants has not been confirmed anywhere in Serbia. On the observed wood-sorrel plants, P. (T.) harti was recorded in cohabitation only with Tetranychus urticae Koch, 1836. Keywords: oxalis spider mites; Petrobiini; Oxalis corniculata; Oxalis articulata 1552099 10.3390/ecologies6040077 1552101 2673‑4133 2025-12-23T13:41:56.750Z 44 yes 46 Katarina Mladenović 0000-0002-9172-2388 46 Bojan Stojnić 46 Biljana Vidović 46 Danilo Furtula 0000-0003-0004-5703 46 Djordje Jović 0000-0002-2413-5394 application/pdf 3695431 https://unilib.phaidrabg.rs/o:8810 no yes 16 70 92000001 71A07 Ecologies 6 MDPI 2025