New synonymies, new combinations and lectotype designations for weevils in the tribe Naupactini (Coleoptera: Curculionidae: Entiminae) Author Río, M. Guadalupe Del Author Lanteri, Analía A. text Zootaxa 2018 2018-10-17 4500 3 329 340 journal article 10.11646/zootaxa.4500.3.2 1175-5326 5297667 48E796B4-A937-44AD-890C-D4472D3C2FCC Trichonaupactus densior Hustache, 1939 Trichonaupactus densius Hustache, 1939: 46 (incorrect original spelling). Type material: lectotype female herein designated; Argentina , La Pampa , General Pico, IV-1934 , JM Bosq; MNHN, col. Hustache. Length: 12 mm . Trichonaupactus densius var. albescens Hustache, 1939: 47 (infrasubspecific rank). Trichonaupactus rexus Hustache, 1939: 47 . Type material: holotype female; Uruguay , Montevideo , J. Tremoleras; MNHN, col. Hustache. Length: 15 mm (Fig. 21). New synonymy . Geographic distribution: Argentina ( Buenos Aires and La Pampa ) and Uruguay ( Montevideo ) . Remarks: We established the synonymy of the only two species of the genus Trichonaupactus Hustache, 1939 , T. densius (replaced by T. densior in Alonso-Zarazaga & Lyal 1999, because the original spelling was incorrect) and T. rexus , because we consider that the characters used to distinguish these species correspond to geographic variation. The only female of T. densior that bears the type label is herein designated as lectotype . There are paralectotypes with same data as the lectotype in the Hustache collection in MNHN ( three females ) and in MLP, Argentina ( 10 females and two males ) (see Morrone & Loiácono, 1992 ). Moreover, in MNHN there is a female from Argentina , La Pampa . General Pico, IV-1934 , JM Bosq, labeled as type of T. densius var. albescens . The material of this variety comes from the same locality as the type of T. densior , consequently this variety should be not treated as subspecific but as infrasubspecific.