A review of the previously monotypic tribe Dibolostethini (Chelodesmidae: Chelodesminae) with description of two new species and a summary of the Chelodesmidae of the Tropical Andes Biodiversity Hotspot Author Means, Jackson C. DFD2FDCA-264D-4CB2-99E7-8C2826EC9370 Virginia Museum of Natural History, 21 Starling Ave., Martinsville, Virginia 24112, USA. jackson.means@vmnh.virginia.gov Author Bouzan, Rodrigo S. 14A15A7F-730F-4D41-BDAC-D53514FAB85D Pós-graduação em Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil. & Laboratório Especial de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brasil, 1500, 05503 - 090, São Paulo, Brazil. rodrigobouzan@ib.usp.br Author Iniesta, Luiz Felipe Moretti DEEF048E-97FB-4CCD-875F-5FA6184CA8AB Laboratório Especial de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brasil, 1500, 05503 - 090, São Paulo, Brazil. luiz-moretti@hotmail.com Author Martínez-Torres, Daniela 3D6A9085-FE64-4647-9A4E-EC1599DD26D4 Grupo de Investigación en Aracnología & Miriapodología (GAM-UN), National University of Colombia, Bogotá, Colombia. sdmartinezt@unal.edu.co Author Vasquez-Valverde, Luisa F. F02C95CA-727E-4170-B81C-A25C9944E700 Department of Entomology, Virginia Tech, 216 A Price Hall, Blacksburg, VA 24061, USA. luisafvv@vt.edu Author Brescovit, Antonio D. 29156EF8-63CA-4499-8CB7-C57C20A9109B Laboratório Especial de Coleções Zoológicas, Instituto Butantan, Avenida Vital Brasil, 1500, 05503 - 090, São Paulo, Brazil. antonio.brescovit@butantan.gov.br Author Ivanov, Kaloyan AD3C06A4-8ECF-40AD-9D17-DCFC8818A5AC Virginia Museum of Natural History, 21 Starling Ave., Martinsville, Virginia 24112, USA. kal.ivanov@vmnh.virginia.gov text European Journal of Taxonomy 2023 2023-07-27 885 1 65 85 http://dx.doi.org/10.5852/ejt.2023.885.2189 journal article 59554 10.5852/ejt.2023.885.2189 f8509ab7-b884-41aa-a5ee-f8c425a46031 2118-9773 8205500 444CE1D2-8098-4CDE-9B97-927CA13FC39F Dibolostethus kattani Means, Bouzan, Martínez-Torres & Ivanov sp. nov. urn:lsid:zoobank.org:act: E4B3174C-2DC2-4584-B664-D0E4FB12D6B7 Figs 1–2 , 3B–D , 7 , 9 Diagnosis Adults males of D. kattani sp. nov. differ from those of D. sicarius and D. inopinatus sp. nov. based on the presence of two pairs of short, blunt projections on the sternite of the 5 th body ring ( Fig. 3D ), and the following combination of gonopodal characteristics: solenomere curving with distinct ridge at midway point, tip relatively straight ( Fig. 7A, S ); prefemoral process slightly thinner basally, with shelf under linear lobe just before apex ( Figs 7A, C , PfP); apex with large, tongue-shaped lobe, best seen in anterior view ( Fig. 7B ). Etymology The species is named in honor of one of its first collectors, the late Dr Gustavo Kattan. Throughout his career, Dr Kattan collected myriapod specimens across Colombia and donated them to the Instituto de Ciencias Naturales. Noun in the genitive case. Type material Holotype COLOMBIA • ♂ ; Valle del Cauca , Cali , 15 km vía Cali-Buenaventura ; [ 3.496° N , 76.613° W ]; 10 Dec. 1990 ; C. Murcia and G. Kattan leg.; under leaf litter in tropical forest ; ICN-MD-1317 A. Paratypes COLOMBIA • 2 ♂♂ ; same collection data as for holotype; ICN-MD-1317B . Other material COLOMBIA • 1 ♂ ; Valle del Cauca , Cali , 16 km vía Cali-Buenaventura ; [ 3.493° N , 76.613° W ]; 1800 m a.s.l. ; 11 Oct. 1979 ; C. Murcia and G. Kattan leg.; under log in tropical forest ; ICN-MD-1219 • 1 ♂ ; Valle del Cauca , Cali , 18 km vía Cali-Buenaventura ; [ 3.517° N , 76.621° W ]; 1900 m a.s.l. ; 10 Nov. 2014 ; D. Martinez leg.; collected at night at the edge of a road ; ICN-MD-1367 . Description Male ( holotype , ICN-MD-1317A) With characteristics typical for the genus. Coloration (recently preserved in 70% ethanol): body rings dark, reddish brown (nearly purple); head light brown; legs yellowish ocher; telson reddish, with posterior margin (= spinnerets region) yellowish ( Fig. 1 ). Antennae broken. Head: epicranial macrosetae 2–2, interantennal macrosetae 1–1, frontal macrosetae 2–2. Sternites: 4 th body ring with two robust, conical, blunt projections, separated along entire length ( Fig. 2B ); 5 th body ring with two pairs of short, blunt projections, the anterior pair more conspicuous ( Fig. 3D ). Gonopod aperture on 7 th body ring oval, rim notably projecting above sternite ( 0.67 mm ), with a deep U-shaped concavity ( 0.3 mm ) on posterior margin. GONOPODS ( Fig. 7 ). Gonocoxae rounded, equivalent to about half the length of the telopodite; not prominent in ectal view, with two macrosetae on dorsum. Cannula hook-shaped, broken in the holotype . Solenomere long, slender, unbranched, curving with distinct ridge at midway point, falciform at apex, tip straight ( Fig. 7 , S). Prefemoral process: thin at base, with shelf ( Fig. 7A , Sh) under linear lobe just before apex ( Fig. 7A , Lb); apex with large, tongue-shaped lobe, best seen in anterior view ( Fig. 7B , PfP). BODY MEASUREMENTS (mm). Total length 29.33, total width 2.10. Collum: length 0.77, width 1.55. Podomere length of 10 th body ring (1–7): 0.29, 0.56, 1.15, 0.52, 0.66, 1.05, 0.11. Gonopod aperture: length 0.50, width 0.86. Gonopod: length 1.21, width 0.96. Gonocoxae: length 0.54, width 0.59. Telopodite: length 1.19, width 0.42. Telson length 0.98. Fig. 7. Dibolostethus kattani Means, Bouzan, Martínez-Torres & Ivanov sp. nov. , holotype, ♂ (ICN- MD-1317A), right gonopod. A . Mesal view. B . Anterior view. C . Lateral view. Red circles = cingulum. Dashed lines = prostatic groove. Abbreviations: Lb = lobe; PfP = prefemoral process; S = solenomere; Sh = shelf. Female Unknown. Distribution Only known from the Valle del Cauca Department , Colombia ( Fig. 9 ).