Twenty-one new species of the Neotropical rove beetle genus Neolindus Scheerpeltz (Coleoptera, Staphylinidae, Paederinae) Author Guzman, Yoan Camilo AD8443F6-89D0-4F71-9F67-4040D20ECB02 Museum and Institute of Zoology, Polish Academy of Sciences, Warsaw, Poland. ycamiloguzmans@gmail.com Author Tokareva, Alexandra F2DB3539-310F-4453-81FA-A6BC0D5C885D Museum and Institute of Zoology, Polish Academy of Sciences, Warsaw, Poland. atokareva@miiz.waw.pl Author Koszela, Katarzyna 06C16202-4569-4156-9FB1-EA4DEE14AE88 Museum and Institute of Zoology, Polish Academy of Sciences, Warsaw, Poland. kat.koszela@gmail.com Author Żyła, Dagmara 0A7FEB0F-308C-4FDF-AD0D-8074BC69F0B3 Museum of Nature Hamburg, Leibniz Institute for the Analysis of Biodiversity Change, Hamburg, Germany. ycamiloguzmans@gmail.com text European Journal of Taxonomy 2024 2024-06-24 942 1 76 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2581/11745 journal article 10.5852/ejt.2024.942.2581 2118-9773 12550288 DF991BC4-1761-4C5D-96E5-EFC62F8F7D1A Neolindus pseudosensillaris Guzman, Tokareva & Żyła sp. nov. urn:lsid:zoobank.org:act: 1F0AFABD-E3B6-4886-88AA-1E909C32AC13 Figs 2E–G , 17 ; Supp. file 2 Diagnosis Neolindus pseudosensillaris Guzman, Tokareva & Żyła sp. nov. resembles N. elegans sp. nov in the shape of posterior margin of sternites VII, VIII, and tergite VIII, as well as structure of aedeagus with denticles on pPMS. However, N. pseudosensillaris has a unique character among all known species of Neolindus : 3 pairs of tapered, fusiform, smooth structures resembling sensilla on the epicranium ( Fig. 2E–G ). Moreover, in N. pseudosensillaris , posterior margin of sternite VII has narrower midline emargination without acute protruding processes on its sides, posterior margin of sternite VIII has narrower V-shape emargination, posterior margin of tergite VIII is slightly truncate ( Figs 5C–E , 17C–E ), and the shape of median lobe as well as morphology of APS is different from those of N. elegans ( Figs 5F–I , 17F–I ). Etymology The name combines ‘ pseudo ’, the Latin prefix for ‘false’, with the New Latin ‘ sensillum ’, a diminutive of Latin ‘ sensus ’ (‘perception, feeling’). It refers to the three sensilla-like structures on the head of unknown origin. An adjective. Type material Holotype Brazil • ♂ ; “ Neolindus pseudosensillaris Guzman, Tokareva & Żyła 2024 HOLOTYPE [red label] \\ Amazonas, Manaus, INPA /Smithsonian Resv; 2°25’00’’S , 59 °50’00’’W ; 93 m [m a.s.l.]; Jun 1994 ; R . Didham Leg.; 631|5”; NHMUK . Paratypes BRAZIL • 1 ♂ ; “ Neolindus pseudosensillaris Guzman, Tokareva & Żyła 2024 PARATYPE [yellow label] \\ same data as for holotype \\ 901|3 ( BMNH )”; NHMUK • 1 ♀ ; same data as for preceding; “21|3’ ( BMNH )”; NHMUK • 1 ♀ ; same data as for preceding; “197|10 ( BMNH )”; NHMUK • 1 ♀ ; same data as for preceding; “501|1 ( BMNH )”; NHMUK • 1 ♀ ; “ Reserva Florestal Adolpho Ducke ; 2°57’47.4”S , 59°55’21.2”W ; 109 m ; Feb 1995 , Barbosa Leg., M.G. V ; G26.30 ( BMNH )”; NHMUK . Description MEASUREMENTS . BL (5.3), H (0.43, 0.62), A (1.15), A1 (0.25, 0.07), A2 (0.1, 0.06), A3 (0.1, 0.07), A4 (0.07, 0.06), A5 (0.08, 0.06), A6 (0.08, 0.06), A7 (0.09, 0.08), A8 (0.07, 0.07), A9 (0.09 0.08), A10 (0.08, 0.08), A11 (0.15, 0.07), NKW (0.25), GL (0.2), P (0.66, 0.73), E (0.98, 0.87), PC (0.4, 0.1), PF (0.36, 0.17), PT (0.61, 0.25), MSC (0.31, 0.14), MSF (0.66, 0.16), MST (0.48, 0.07), MTC (0.29, 0.22), MTF (0.66, 0.16), MTT (0.68, 0.08). COLOURATION . Head and pronotum dark brown; legs light brown; abdomen brown. HEAD . Head capsule wider than long; anterior margin straight; posterior margin rounded, with emargination in front of neck; posterior angles straight; setation with 1 pair of PCS and 1 row of PMS. Epicranium smooth, without micropunctuation, setation with 1 pair of FS and 2 pairs of PFS, without OS; 3 pairs in line of tapered fusiform smooth structures resembling sensilla with sockets posterior to antennal incisions. Gena with irregular surface, with depression from mandibular base to middle of eye; setation with 1 OT, MS, and POS; sockets of MS and POS umbilicate. Postgena with row of 3 setae in line from eye to gular suture; gular sutures reaching posterior margin of head joining with neck pits; anterior part of gula with 2 setae; posterior margin of head with 2 pairs of setae. Neck with foramen magnum occupying ¾ of occiput. Antenna moniliform from antennomere 5, shorter than head and pronotum combined ( Fig. 17A ); antennomeres longer than wide, tomentose pubescence starting from antennomere 4; antennomere 1 as long as antennomeres 2 and 3 combined, antennomere 3 longer than 2. Labrum bilobed, with U-shaped emargination ( Fig. 17A ; Supp. file 2). THORAX . Pronotum slightly wider than long, with umbilicate micropunctures, 2 paramedial and 2 lateral rows of setae. Prosternum with superior marginal line parallel to anterior margin. Metasternal intercoxal process with 1 pair of rounded processes. Elytron longer than wide, surface of elytra with moderately dense umbilicate punctures in 8–10 longitudinal rows ( Fig. 17A ; Supp. file 2). LEGS . Protibia with 5–6 well-developed combs of setae; apical comb longitudinal, composed of widely separated, thick setae; mesotibial apical ctenidium on both sides, inner longer than outer; mesotarsomere 1 longer than 2, mesotarsomeres 3 and 4 as long as 2, mesotarsomere 5 longer than mesotarsomere 1; inner ctenidium of metatibia longer than outer; metatarsomere 1 as long as metatarsomere 2, metatarsomere 3 shorter than metatarsomere 1 and as long as metatarsomere 4, metatarsomere 5 longer than metatarsomere 1. ABDOMEN . Tergites with low-density randomly distributed micropunctuation. Posterior margin of tergite VII straight ( Fig. 17B ). Posterior margin of tergite VIII elongate, rounded, with lateral edges slightly curved ( Fig. 17D ). Male : posterior margin of sternite VII with moderately deep midline emargination bordered by acute processes, with internal margin of emargination slightly bent posteriad in middle; surface adjacent to emargination with shallow, median, glabrous, and quadrate invagination ( Fig. 17C ). Posterior margin of sternite VIII with midlongitudinal V-shaped emargination, lateral angles rounded ( Fig. 17E ). Posterior margin of tergite IX with midlongitudinal deep emargination in ¾ of segment length; aedeagus, in parameral view, median lobe slightly widened at base, apex with narrow emargination not exposing margin of median foramen and with flattened lateral processes folded towards emargination. Apical sclerites with more than 3 pairs of elements. pPMS robust, flattened, curved around longitudinal axis, with multiple denticles on top. pLS absent. APS flattened, spoon-like, with 3 apical projections; middle projection wide, flat, enfolding pPMS, longer than pPMS, with elevated angles; lateral projections acute, bent towards parameral side, shorter than pPMS (16F–I). Female : lack of emargination on abdominal segments VII and VIII. Distribution The species is known from the type locality in Brazil (Amazonas, Manaus, Projeto Dinâmica Biológica de Fragmentos Florestais reserve) and nearby Reserva Florestal Adolpho Ducke. It was collected at a low altitude.