Vincenzellus ruficollis (Panzer, 1794) Materials Type status: Other material. Occurrence: catalogNumber: BFUS-COL 000639; recordedBy: Ognyan Sivilov & Hristina Hristova; individualCount: 1; sex: male; occurrenceID: 681B374A-6F6B-57B1-8659-51C21E59FF10; Location: country: Bulgaria; stateProvince: Lovech; municipality: Troyan; locality: Central Stara Planina Mountains, SW of Chiflik Village, near Beli Osam River; verbatimElevation: 760 m; decimalLatitude: 42.823450; decimalLongitude: 24.540833; geodeticDatum: WGS 84; Identification: identifiedBy: Denis Gradinarov; dateIdentified: 2025; Event: samplingProtocol: flight interception trap; verbatimEventDate: 13. v. 2020 – 28. v. 2020; habitat: beech forest (Fagus sylvatica L.) with solitary trees of Populus tremula L., Abies alba Mill. and other tree species Type status: Other material. Occurrence: catalogNumber: BFUS-COL 000640; recordedBy: Ognyan Sivilov & Hristina Hristova; individualCount: 1; sex: female; occurrenceID: 76641DB9-93DE-5949-B668-F3A3C7AFE26C; Location: country: Bulgaria; stateProvince: Lovech; municipality: Troyan; locality: Central Stara Planina Mountains, SW of Chiflik Village, near Beli Osam River; verbatimElevation: 760 m; decimalLatitude: 42.823450; decimalLongitude: 24.540833; geodeticDatum: WGS 84; Identification: identifiedBy: Denis Gradinarov; dateIdentified: 2025; Event: samplingProtocol: flight interception trap; verbatimEventDate: 13. v. 2020 – 28. v. 2020; habitat: beech forest (Fagus sylvatica L.) with solitary trees of Populus tremula L., Abies alba Mill. and other tree species Type status: Other material. Occurrence: catalogNumber: BFUS-COL 000641; recordedBy: Ognyan Sivilov & Hristina Hristova; individualCount: 1; sex: female; occurrenceID: 7684C949-C06C-5436-94C0-B1A2D25A9242; Location: country: Bulgaria; stateProvince: Lovech; municipality: Troyan; locality: Central Stara Planina Mountains, SW of Chiflik Village, near Beli Osam River; verbatimElevation: 760 m; decimalLatitude: 42.823450; decimalLongitude: 24.540833; geodeticDatum: WGS 84; Identification: identifiedBy: Denis Gradinarov; dateIdentified: 2025; Event: samplingProtocol: flight interception trap; verbatimEventDate: 13. v. 2020 – 28. v. 2020; habitat: beech forest (Fagus sylvatica L.) with solitary trees of Populus tremula L., Abies alba Mill. and other tree species Type status: Other material. Occurrence: catalogNumber: BFUS-COL 000642; recordedBy: Ognyan Sivilov & Hristina Hristova; individualCount: 1; sex: female; occurrenceID: 30D8D554-E6DB-5B16-AB51-995A389CC413; Location: country: Bulgaria; stateProvince: Lovech; municipality: Troyan; locality: Central Stara Planina Mountains, SW of Chiflik Village, near Beli Osam River; verbatimElevation: 760 m; decimalLatitude: 42.823450; decimalLongitude: 24.540833; geodeticDatum: WGS 84; Identification: identifiedBy: Denis Gradinarov; dateIdentified: 2025; Event: samplingProtocol: flight interception trap; verbatimEventDate: 13. v. 2020 – 28. v. 2020; habitat: beech forest (Fagus sylvatica L.) with solitary trees of Populus tremula L., Abies alba Mill. and other tree species Description This species is characterised by its relatively short and very broad rostrum, bicoloured body with brownish-red head and pronotum and metallic blue elytra (Fig. 6). The pronotum has distinct paired basal depressions. The antenna has an indistinct club of five antennomeres, colour reddish-brown with club generally darker (Barnouin and Zagatti 2017, Viñolas et al. 2021).

Published as part of Gradinarov, Denis, Petrova, Yana & Sivilov, Ognyan, 2026, Review of the families Mycteridae, Pythidae and Salpingidae (Coleoptera, Tenebrionoidea) of Bulgaria, pp. e 185958 in Biodiversity Data Journal 14 on page e185958, DOI: 10.3897/BDJ.14.e185958