Nativus gen. nov., a new huntsman spider genus from South America (Araneae: Sparassidae: Heteropodinae) Author Casas, Cristian M. Grupo de Investigación Biodiversidad del Caribe Colombiano, Semillero de Investigación Sistemática de Artrópodos Neotropicales, Departamento de Biología, Universidad del Atlántico, Barranquilla, Colombia. Author Rheims, Cristina A. 0000-0003-4418-0552 Laboratório de ColeçƖes Zoológicas, Instituto Butantan, Av. Vital Brasil, 1500, 05503 - 900, São Paulo, SP, Brazil. carheims @ gmail. com; https: // orcid. org / 0000 - 0003 - 4418 - 0552 carheims@gmail.com text Zootaxa 2023 2023-10-25 5360 1 1 43 https://www.mapress.com/zt/article/download/zootaxa.5360.1.1/52103 journal article 278360 10.11646/zootaxa.5360.1.1 f88dc475-4761-4d63-bf1a-9c14122d381b 1175-5326 10146274 C97810F4-A6EB-4040-8DC4-0BBCD687E9AF Nativus napo sp. nov. Figs 65−79 Type material: Holotype : PERU : Loreto : ♂, Maynas , Rio Napo ( -1.8703 , -74.7904 , 200 m ), 11 January 2009 , W. Yawaromi leg. ( MUSM ENT-505866 ) . Paratypes : PERU : Loreto : 1♂, from the same vial as holotype ( MUSM ENT-505866 ) ; 1♂, 2 juv. , Estirón [ -3.3166 , -71.8500 ], Río Ampiacu , 13 November−9 December 1961 , B. Malkin leg. ( AMNH ) ; 1♀ , Pebas , Río Amazonas ( -3.1333 , -71.8167 ), 12−15 April 1977 , C.W. Myers leg. ( AMNH ) . Etymology. The specific name refers to the type locality; noun in apposition. Diagnosis. Males of N. napo sp. nov. resemble those of N. janai sp. nov. ( Figs 39−41 ) and N. yurupari sp. nov. ( Figs 136−138 ) by the tegulum with large triangular RdP, at least 1.5 times longer than wide and E sinuous in the male palps. It is distinguished from both species by the palps with dRTA single and distally truncated ( Figs 75−76 ) (bifid in both latter species). Females resemble those of N. yurupari sp. nov. ( Figs 139−141 ) by the MS diamond shaped, anterior to fused part of LL. They are distinguished from the latter species by the fused part of LL extending until 1/3 of EF length and MS roughly as wide as long ( Fig. 77 ) (fused part of LL extending until almost half EF length and MS two times longer than wide in the latter species). FIGURES 65–69. Nativus napo sp. nov. , male (MUSM 5058866). 65−66 Habitus (65 dorsal, 66 ventral); 67−69 Left palp (67 prolateral, 68 ventral, 69 retrolateral). Scale lines: 65−66 = 2 mm; 67−69 = 1 mm. FIGURES 70–73. Nativus napo sp. nov. , female (AMNH). 70−71 Habitus (70 dorsal, 71 ventral); 72−73 Epigyne/vulva (72 ventral, 73 dorsal). Scale lines: 70−71 = 2 mm, 72−73 = 1 mm. Description. Male ( holotype ): Specimen slightly dried out. Prosoma brown, darker along thoracic striae; fovea dark brown; eye borders black. Chelicerae legs and palps pale brown. Endites pale brown, distally slightly lighter. Labium brown, distally pale brown. Sternum pale brown with darker brown margins. Opisthosoma brownish gray; dorsally with one pair of rounded muscle impressions. Ventrally with two V-shaped lines of muscle impressions. Spinnerets brownish gray ( Figs 65−66 ). Total length 7.0. Prosoma: 3.7 long, 3.3 wide. Opisthosoma: 3.1 long, 1.6 wide. Eyes: diameters: 0.26, 0.24, 0.20, 0.28; interdistances: 0.12, 0.04, 0.26, 0.30, 0.20, 0.24. Legs (2413): I: 21.9 (5.9, 1.5, 6.4, 6.4, 2.7); II: 27.9 (7.2, 1.6, 7.6, 8.1, 3.4); III: 17.8 (4.9, 1.3, 4.7, 5.0, 1.9); IV: 22.3 (6.0, 1.2, 5.5, 7.0, 2.6). Palp: PTA triangular, distally rounded, as wide as long; VTA reduced; vRTA two times longer than wide in retrolateral view; bp of irregular shape, roughly 1.5 times longer than wide ( Figs 67−69 , 74−76 ). Female ( paratype ): Prosoma brown; fovea and thoracic striae dark brown; eye borders black. Chelicerae, palps and legs brown, slightly lighter than prosoma; legs with faint brown marks at the base of spines. Labium brown, distally pale brown. Endites pale brown, distally lighter. Sternum pale brown with brown margins. Opisthosoma brown; dorsally with slightly lighter heart mark and two pairs of small rounded muscular impressions; ventrally lighter brown with two more or less parallel lines of muscle impressions. Spinnerets pale brown, distally cream colored ( Figs 70−71 ). Total length 7.6. Prosoma 3.0 long, 2.7 wide. Opisthosoma: 4.6 long, 2.6 wide. Eyes: diameters: 0.23, 0.28, 0.22, 0.29; interdistances: 0.10, 0.04, 0.26, 0.27, 0.20, 0.22. Legs (2143): I: 12.8 (3.5, 1.3, 3.6, 3.1, 1.3); II: 14.4 (4.1, 1.3, 4.1, 3.5, 1.4); III: 10.7 (3.2, 1.0, 2.7, 2.7, 1.1); IV: 12.7 (3.8, 0.9, 3.1, 3.5, 1.4). Epigyne: EF as wide as long; MS with CO situated anteriorly ( Figs 72 , 77 ). Vulva: CD with first winding gently curving laterally; encapsulated part of internal ducts 2.5 times longer than wide, dilated posteriorly; FD anteriad ( Figs 73 , 78−79 ). Variation. Males (n = 2): Total length 6.6−7.0; prosoma length 3.5−3.7; femur I length 5.4−5.9. Distribution. Known from the state of Loreto , in north and northeastern Peru ( Fig. 143 ).