The species-group names of bees (Hymenoptera: Apoidea, Apiformes) described from Crimea, North Caucasus, European part of Russia and Ural. Part III. Families Melittidae and Apidae (Except Bombus Latreille and Apis Linnaeus) Author Proshchalykin, M. Yu. Author Astafurova, Yu. V. Author Levchenko, T. V. Author Shlyakhtenok, A. S. Author Schwarz, M. text Far Eastern Entomologist 2019 2019-12-06 396 17 44 http://dx.doi.org/10.25221/fee.396.3 journal article 10.25221/fee.396.3 2713-2196 7164991 FE1F63DC-55A9-4B48-BF26-B500BE9A0B3A Tetralonia nigriventris Alfken, 1931 Tetralonia nigriventris Alfken, 1931: 111–112 , , [ holotype : , "Distr. Armavir , Gulko- vitschi, St. Selek. Exp. N. Tellgulskaja” [Gulkevichi, Krasnodar Terr., Russia ], probably lost]. CURRENT STATUS. Nomen dubium (Levchenko et al ., 2017b). REMARK. Type specimens are possible lost. According to brief description, this species belongs to the subgenus Synhalonia Patton, 1879 of the genus Eucera Scopoli, 1770 .