A new species from the eastern Amazon rainforest with lectotype designations and key for Brazilian Oxarthrius Reitter, 1883 (Coleoptera: Staphylinidae: Pselaphinae) Author Gouvea, Bruno 0009-0002-1540-9303 Universidade Federal do Pará, Instituto de Ciências Biológicas, Laboratório de Invertebrados, Belém, Pará, Brazil. brunoleandro 555 @ gmail. com; https: // orcid. org / 0009 - 0002 - 1540 - 9303 brunoleandro555@gmail.com Author Valente, Roberta M. 0000-0002-8249-5937 Universidade Federal do Pará, Instituto de Ciências Biológicas, Laboratório de Invertebrados, Belém, Pará, Brazil. roberta. mvalente @ gmail. com; https: // orcid. org / 0000 - 0002 - 8249 - 5937 roberta.mvalente@gmail.com Author Asenjo, Angélico Instituto Tecnológico VALE, R. Boaventura da Silva 955, Nazaré, 66055 - 090 Belém, PA. Brazil. & Departamento de Entomología, Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos, Av. Arenales 1256, Jesús María, Lima 14, Perú. text Zootaxa 2023 2023-11-29 5380 2 134 150 https://www.mapress.com/zt/article/download/zootaxa.5380.2.2/52383 journal article 280635 10.11646/zootaxa.5380.2.2 5b26dce8-9892-4be5-9cb3-755d9664ea38 1175-5326 10216220 6B51DC3F-67C4-4833-92C7-3387297985A6 Oxarthrius ( Oxarthrius ) anthicoides (L.W. Schaufuss, 1887 ) ( Figs 7A–D ) Batrisus anthicoides L.W. Schaufuss, 1887: 142 (description, type locality: “Brasilia”), Lectotype female, MNHN. C. Schaufuss 1888: 11 (catalog). Batrisus ( Oxarthrius ) anthicoides . Raffray 1897: 242 (mention). Raffray 1898: 438 (redescription). Oxarthrius anthicoides . Raffray 1904: 77 (catalog). Raffray 1908: 154 (catalog). Raffray 1911: 59 (catalog). Blackwelder 1944: 92 (checklist). Asenjo et al . 2013: 13 (checklist). Asenjo et al . 2018: 404 (mention). Oxarthrius ( Oxarthrius ) anthicoides . Park 1942: 246 (checklist). Lectotype (here designated) ( Fig. 7C ). BRAZIL : ♀ , [specimen glued to the tip of triangle of white card]; “Brésil [handwriting in old white label]”, “ O.Anthicoides [handwriting] / A. Raffray det. [printed in old white label]”, “ Oxarthrius / anthicoides. / type Schfs. / Brésil [handwriting in blue label]”, “TYPE. [printed in red label]”, “MUSEUM PARIS / 1917 / COLL. A: RAFFRAY [printed in old white label]”, “SYNTYPE [printed in red label]”, “SYNTYPE / Oxarthrius / anthicoides (Schaufuss / 1887 [printed in white label]”, “ MNHN , Paris / EC21543 / [image data code] [printed in white label]”. Distribution. For full record and distribution see Asenjo et al . (2013) . Comments. In the original description, L.W. Schaufuss (1887) did not specify the number of specimens he studied. We studied one specimen based on pictures sent by Antoine Mantilleri from the MNHN with label “TYPE” and “ SYNTYPE , and it is here selected as the lectotype .