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 300001 10.5852/ejt.2024.942.2581 5200ad90-b89a-4d6e-b7f8-de33e9bc509c 2118-9773 12550288 DF991BC4-1761-4C5D-96E5-EFC62F8F7D1A Neolindus bicornis Guzman, Tokareva & Żyła sp. nov. urn:lsid:zoobank.org:act: A3AE98B8-192C-498F-82DA-F147AF44B503 Fig. 4 ; Supp. file 2 Diagnosis This species is similar to N. apiculus and N. campbelli in having a broad emargination of sternite VIII ( Herman 1991 : figs 168, 173; Fig. 4E ). However, the structure of the aedeagus in N. bicornis Guzman, Tokareva & Żyła sp. nov. is different ( Herman 1991 : figs 170, 174; Fig. 4F–I ). It resembles the aedeagus of N. triangularis Guzman, Tokareva & Żyła sp. nov. , but it differs by having a rounded base of the median lobe and a narrower pLS in their middle part (the base of the median lobe acute in N. triangularis ) ( Figs 4F–I , 20F–I ). Etymology The name is a combination of the Latin prefix ‘ bi ’ meaning ‘two’ and the Latin word ‘ cornum ’, which means ‘a horn’. It describes the characteristic form of apical aedeagal sclerites. An adjective. Type material Holotype FRENCH GUIANA • ♂ ; “ Neolindus bicornis Guzman, Tokareva & Żyła 2024 HOLOTYPE [red label] \\ Roura , 18.4 Km SSE , 240 m [m a.s.l.]; 4°36”38”N, 52°13’25’’W; 29 May–10 Jun 1997 ; J. Ashe , R Brooks Leg.; FG1AB97 180; ex: flight intercept trap \\ SM0100688 KUNHM-ENT [barcode]”; KUNHM-ENT. Paratypes FRENCH GUIANA • 2 ♀♀ , 2 ♂♂ ; “ Neolindus bicornis Guzman, Tokareva & Żyła 2024 PARATYPE [yellow label] \\ Cayenne , Roura , 27.4 Km SSE ; 280 m [m a.s.l.]; 4°44’20”N , 52°13’25’’W ; 10 Jun 1997 ; J. Ashe , R Brooks, FG1AB97 177 ex: flight intercept trap \\ [barcode] SM0133909 KUNHM-ENT ”; KUNHM-ENT • 1 ♂ ; same data as for preceding; “ SM0133998 KUNHM-ENT [barcode]”; KUNHM-ENT • 1 ♂ ; “ 18.4 Km SSE ; 240 m ; 4°36”38”N, 52°13’25’’W; 25–29 May 1997 ; FG1AB97 081; ex: flight intercept trap \\ SM0098969 KUNHM-ENT [barcode]”; KUNHM-ENT . Description MEASUREMENTS . BL (9), H (0.49, 1.04), A (1.71), a1 (0.34, 0.11), a2 (0.14, 0.07), a3 (0.26, 0.08), a4 (0.12, 0.09), a5 (0.13, 0.09), a6 (0.12, 0.08), a7 (0.12, 0.09), a8 (0.11, 0.09), a9 (0.11, 0.08), a10 (0.11, 0.09), a11 (0.14, 0.1), NKW (0.49), GL (0.21), P (1.09, 1.29), E (1.59, 1.39), PC (0.5, 0.29), PF (0.86, 0.39), PT (0.65, 0.15), MSC (0.4, 0.46), MSF (1.13, 0.29), MST (0.82, 0.11), MTC (0.46, 0.25), MTF (1.15, 0.28), MTT (0.9, 0.13). COLOURATION . Head dark brown; pronotum brown; legs light brown; abdomen brown. Fig. 4. Neolindus bicornis Guzman, Tokareva & Żyła sp. nov. , holotype, ♂ (KUNHM-ENT). A . Habitus, dorsal view. B−E . Abdominal segments, posterior margin schemes. B . Tergite VII. C . Sternite VII. D . Tergite VIII. E . Sternite VIII. F−I . Aedeagus. F . Parameral view. G . Parameral view scheme. H . Lateral view. I . Lateral view scheme. Scale bars: A = 1 mm; B–I = 0.5 mm. HEAD . Head capsule wider than long; anterior margin sinuate, dorsoventrally deflexed, slightly elevated; posterior margin straight with emargination in front of neck; posterior angles straight; setation with 1 pair of PCS and 1 row of PMS. Epicranium with umbilicate, low-density micropunctuation, setation with 1 pair of FS and 1 pair of PFS, without OS. Gena with depression from mandibular base to middle of eye, setation with 1 OT, MS, POS and PTOS; sockets of MS and POS umbilicate. Postgena with row of 2 setae in line from eye to gular suture; gular sutures reaching posterior margin of head, joining neck pits; anterior part of gula with 2 setae. Neck with foramen magnum occupying ¾ of occiput. Antenna moniliform from antennomere 3, shorter than head and pronotum combined; antennomeres longer than wide, tomentose pubescence starting from antennomere 3; antennomere 1 shorter than antennomeres 2 and 3 combined, antennomere 3 longer than 2. Labrum bilobed, emargination deep, U-shaped, with 2 dark, thick seta in median line of labrum lobes ( Fig. 4A , Supp. file 2). THORAX . Pronotum slightly wider than long, with randomly distributed umbilicate micropunctuatoin and slightly convex anterior margin. Basisternum of prosternum with tuberculate micropunctuation. Metasternal intercoxal process with 1 pair of acute processes. Elytron longer than wide, surface of elytra with moderately dense umbilicate punctures in 8–10 longitudinal rows ( Fig. 4A ; Supp. file 2). LEGS . Protibia with 4 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 as long as mesotarsomere 2, mesotarsomere 3 shorter than mesotarsomere 1, but as long as mesotarsomere 4, mesotarsomere 5 as long as mesotarsomere 1; inner ctenidium of metatibia longer than outer; metatarsomere 1 longer than metatarsomere 2, metatarsomere 2 longer than metatarsomere 3, metatarsomere 4 as long as metatarsomere 3, metatarsomere 5 shorter than 1 but longer than 2. ABDOMEN . Male : posterior margin of sternite VII sinuate, with midlongitudinal emargination and rounded lateral angles ( Fig. 4C ). Posterior margin of tergite VIII with elongate rounded apex ( Fig. 4D ). Posterior margin of sternite VIII with median V-shaped emargination and rounded lateral angles ( Fig. 4E ). Posterior margin of tergite IX with midlongitudinal deep emargination in ¾ of segment length, wider at margin and narrow towards apex; aedeagus, median lobe rounded at base, widening apically and well-sclerotised; pLS fused into flattened arcuate sclerite of almost even width with 2 acute processes on each side protruding distad from median foramen and ending bent to antiparameral side. APS flattened, arcuate, smaller than pLS, with 2 acute processes on each side protruding distad from median foramen and ending bent to parameral side, shorter than processes of pLS. pPMS not visible ( Fig. 4F–I ). Female : lack of emargination on abdominal segments. Distribution This species is known from the type locality in French Guyana (Cayenne, Roura) and the surrounding area. It was collected by a flight interception trap at an altitude of 240–280 m a.s.l.