Received: 29.05.2019 Corresponding editor: B. Huber Accepted: 30.07.2019 Published: 02.09.2019 Bonn zoological Bulletin 68 (2): 183–187 ISSN 2190–7307 2019 · Breitling R. http://www.zoologicalbulletin.de https://doi.org/10.20363/BZB-2019.68.2.183 INTRODUCTION The taxonomic placement of Euophrys petrensis has been problematic for some time, since the revision and major expansion of the genus Talavera Peckham & Peckham, 1909, by Logunov (1992). Logunov (1992) transferred four Palaearctic members of Euophrys s. lat. to Talavera (T. aequipes, T. monticola, T. thorelli, and T. trivittata). However, he delayed the transfer of their close relative, E. petrensis, as the latter showed ambiguous characters implying a possible closer affnity to Euophrys s. str. (e.g., chitinous rings in the epigynum and twisted insemination ducts, as well as a pronounced sexual dimorphism). Lo- gunov (1992) also remarked that T. aequipes occupies a similar morphologically intermediate position between Talavera and Euophrys s. str. Logunov et al. (1993) then indicated that all species of their petrensis group of Euophrys s. lat. (E. petrensis, E. aequipes, and E. thorelli) should be included in the genus Talavera, without, however, providing additional arguments regarding E. petrensis itself. The transfer of the latter was formalized by Żabka (1997; see also Żabka & Prószyński 1998), and Talavera petrensis was generally accepted as the valid combination by subsequent authors. Logunov & Kronestedt (2003) re- viewed Talavera s. lat. and list the diagnostic characters of the expanded genus: absence of a tibial apophysis; en- dite tooth on the male maxilla; long white/red hairs on the base of the cymbium; clearly exposed embolus-tegu- lum membrane; thin, thread-like insemination ducts; and scales with a well-marked keel on carapace and abdomen. However, most recently, Prószyński et al. (2018) trans- ferred T. petrensis back to Euophrys, but maintained other members of the petrensis group (sensu Logunov et al. 1993), such as T. aequipes and T. thorelli, within Talavera. This re-transfer was based on Proszynski’s non-cladistic approach combined with a different relative weighting of the various characters already highlighted as ambiguous by Logunov (1992): the coiled embolus and colourful frontal hairs of the male. The absence of a tib- ial apophysis, which Logunov & Kronestedt (2003) de- scribe as one of the most important diagnostic characters of Talavera, was considered as non-informative, as the apophysis in Euophrys s. str. is typically highly reduced, and the thin copulatory ducts were considered an artefact of observation by optical microscopy, while “they appear much broader” when observed by scanning electron mi- croscopy (Prószyński et al. 2018); this latter argument is not quite convincing, being based on a rather subjective comparison of published fgures. The other characters discussed by Logunov & Kronestedt (2003) received no further attention. Given this controversial history, it was interesting to examine if the publicly available barcoding sequences could be used to supplement the morphological data to resolve the placement of Euophrys petrensis, in analogy to the approach taken in Breitling (2017, 2019). In a bar- coding study of German spiders, the species had already been shown as sister of Talavera aequipes, rather than Euophrys frontalis (Astrin et al. 2016: Supplementary Figures S1 and S2); as these results were based on a lim- ited set of species and were not further discussed in the article, the robustness of this relationship remained un- clear, but the results certainly indicated that the barcode data should contain relevant phylogenetic information. Abstract. The small jumping spider Euophrys petrensis C. L. Koch, 1837 combines morphological characters of both Euophrys s. str. and Talavera, and its generic placement has consequently been contentious. After many years of being placed in Talavera, the species has recently been transferred back to Euophrys. Here, public DNA barcoding data are used to confrm that the species should be placed in the genus Talavera, as T. petrensis, stat. rev., as is also indicated by several putative morphological synapomorphies identifed earlier. Key words. Araneae, DNA barcoding, phylogenetic systematics. Research article urn:lsid:zoobank.org:pub:F0246630-F65F-4FF1-BF4E-008D483BDA2C Euophrys petrensis C. L. Koch, 1837 is a genuine member of the genus Talavera (Araneae: Salticidae) Rainer Breitling Faculty of Science and Engineering, University of Manchester, Manchester M1 7DN, UK * Corresponding author: Email: rainer.breitling@manchester.ac.uk urn:lsid:zoobank.org:author:17A3B585-0E06-436C-A99A-1C7F24DC88D7