Meeting the southern brothers: a revision of the Neotropical spider genus Hexapopha Platnick, Berniker & Víquez, 2014 (Araneae, Oonopidae) Author Feitosa, Níthomas M. 0000-0002-8013-9947 nithomasmateus@gmail.com Author Ott, Ricardo 0000-0001-7392-1415 aracnomcn@gmail.com Author Bonaldo, Alexandre B. 0000-0002-8013-9947 nithomasmateus@gmail.com text Zootaxa 2023 2023-08-11 5329 1 1 150 http://dx.doi.org/10.11646/zootaxa.5329.1.1 journal article 10.11646/zootaxa.5329.1.1 1175-5326 8244009 BDC2B521-8DC4-4680-A210-5CAEF611F02B Hexapopha santosi sp. nov. Figs 32–34 ; Map 4 Type material: Holotype : male from Estaç „o Ecológica do Una , Una , Bahia , Brazil ( 14º48’S , 39º02’W / 15º17’48”S , 39º04’28”W ), Oct. 1999 – Sept. 2000 , M.F. Dias leg., 1♁, deposited in IBSP 63932, PBI_OON 51526 . Paratypes : same data as holotype, 1♁, 1♀ ( IBSP 65264 , PBI _ OON 52424 ); 1♁ ( IBSP 64207 , PBI _ OON 51535 ); 1♁ ( IBSP 65263 , PBI _ OON 51545 ) . Etymology. The specific name is a patronym honoring the arachnologist Adalberto José dos Santos (Universidade Federal de Minas Gerais ), recognizing his great contribution to the Goblin Spiders PBI. Diagnosis. Males resemble those of H. rheimsae sp. nov. and H. erebai sp. nov. by the presence of a median concavity in the sternum ( Figs 20A , 34B , 36A ). They differ from H. erebai sp. nov. by the endite’s P1 not posteriorly directed, not reaching the anterior margin of sternum ( Fig. 34D ) and from both H. rheimsae sp. nov. and H. erebai sp. nov. by the labium anterior margin projected forward at middle ( Fig. 34D ). They further differ from H. rheimsae sp. nov. by the endite’s P1 protuded distally (subquadrangular in H. rheimsae sp. nov. ). Females differ from those of other species with a narrow postepigastric plate (distinctly wider than long) bearing a small scape ( H. quadraginta s p. nov. , H. kropfi sp. nov. , H. wangi sp. nov. , H. izquierdoi sp. nov. and H. ubicki sp. nov. ; Figs 38G , 57J , 75J , 78J , 87J ) by the postepigastric plate elevated posteriorly ( Fig. 33H ). FIGURES 32A–I . Hexapopha santosi sp. nov. , male (IBSP 65263; PBI_OON 51545). A–B habitus. A dorsal view. B lateral view. C–E carapace. C dorsal view. D ventral view. E anterior view. F mouthparts, ventral view. G abdomen, ventral view. H–I left palp. H prolateral view. I retrolateral view. Scale bars: 0.1mm. Description . Male (PBI_OON 51526). Total length 1.65. CEPHALOTHORAX: Carapace orange-brown, with Coxapopha -like pattern, pars cephalica strongly elevated in lateral view, surface of elevated portion of pars cephalica smooth, sides granulate, fovea present ( Figs 32B–C ). Eyes ALE oval, PME circular, PLE oval; posterior eye row recurved from above, straight from front; ALE separated by their radius to diameter, ALE-PLE separated by less than ALE radius, PME touching throughout most of their length, PLE-PME separated by less than PME radius ( Fig. 32E ). Sternum longer than wide, pale orange, median concavity present, with radial furrows between coxae I–II, II–III, III–IV, furrow smooth, surface smooth, without pits, microsculpture absent ( Figs 32D , 33B–C ). Mouthparts : Chelicerae widely divergent, distal region unmodified ( Fig. 32E ). Labium anterior margin anteriorly projecting at middle, much wider than long ( Fig. 34D ). Endites with a median projection (mp), a P1, a P2 and a P3; mp very short, directed anteriorly; P1 lamellar, directed anteriorly, situated laterally to mp. P2 short, lamellar, situated anteriorly to mp. P3 short, lamellar, directed anteriorly, situated posteriorly to P1 ( Figs 32F , 34D–E ). ABDOMEN: dorsum soft portions pale orange. Book lung covers large, ovoid. Dorsal scutum orange-brown, covering full length of abdomen, no soft tissue visible from above. Epigastric scutum not protruding. Postepigastric scutum pale orange, almost semicircular, covering nearly full length of abdominal length ( Figs 32B,G , 34F ). LEGS: pale orange. GENITALIA: Epigastric region with sperm pore situated at level of posterior spiracles. Palp proximal segments pale orange; embolus very short (only twice longer than wide), tip flattened, not bent upwards; conductor present, tip thornlike, without projections, half the length of the embolus, broader at base ( Figs 32G–I , 34H–K ). FIGURES 33A–H . Hexapopha santosi sp. nov. , female (IBSP 65264; PBI_OON 51424). A–B habitus. A dorsal view. B lateral view. C–E carapace. C dorsal view. D ventral view. E anterior view. F abdomen, ventral view. G–H epigastric region. G ventral view. H lateral view (arrow: postepigastric plate). Scale bars: 0.1mm. Abbreviation: sc, epigastric scutum. FIGURES 34A–L . Hexapopha santosi sp. nov. , male, SEM images (IBSP 65306; PBI_OON 51573). A–C carapace. A lateral view. B frontal view (arrow: median concavity). C ventral view. D mouthparts, ventral view. E endites, anterior view. F abdomen, lateral view. G sperm pore, ventral view. H–I left palp. H retrolateral view. I prolateral view. J–K embolus. J retrolateral view. K prolateral view. L chelicerae, posterior view. Abbreviations: c, conductor; E, embolus; la, labium; mp, median projection; P, projection. Female (PBI_OON 52424). As in male except as noted. Total length 1.92. CEPHALOTHORAX: Carapace without any pattern, pars cephalica slightly elevated in lateral view, sides finely reticulate ( Fig. 33B ). Eyes PLE circular; posterior eye row straight from above; PME separated by less than their radius ( Fig. 33E ). Mouthparts : Chelicerae, endites and labium pale orange. Labium rectangular, anterior margin indented at middle ( Fig. 33D ). ABDOMEN: Postepigastric scutum orange-brown, long, semicircular ( Figs 33A–B,F ). GENITALIA: Ventral view: postepigastric plate nearly three times wider than long, with posterior margin slightly protruding, postepigastric scape present, pointed ventrally ( Figs 33G–H ). Other material examined. Brazil . Bahia . Una : Estaç „o Ecológica do Una ( 14º48’S , 39º02’W / 15º17’48”S , 39º04’28”W ) Oct, 1999– Sept. 2000 , M.F. Dias leg., 1♁ ( IBSP 65101 , PBI _ OON 51528 ); 1♁ ( IBSP 64265 , PBI _ OON 51567 ); 1♁ ( IBSP 65306 , PBI _ OON 51573 ); 1♁ ( IBSP 65501 , PBI _ OON 51540 ); 1♁ ( IBSP 65251 , PBI _ OON 52427 ) . Distribution. Known only from type locality, Una, state of Bahia , Brazil ( Map 4 ).