Revision of the Neotropical spider genus Acanthoctenus (Araneae: Ctenidae Acanthocteninae) Arizala, Stephany Labarque, Facundo Martín Polotow, Daniele Zootaxa 2021 2021-01-27 4920 1 1 55 98ZBS Arizala & Labarque & Polotow, 2021 Arizala & Labarque & Polotow 2021 [151,465,618,645] Arachnida Ctenidae Acanthoctenus Animalia Araneae 45 46 Arthropoda species manauara sp. nov.   Figs 1–3, 10B, 44–47   Type material.  Female holotypefrom Campus da Universidade Federal do Amazonas[ 3°05’53.3”S, 59°58’07.9”W], Manaus, state of Amazonas, Brazil,  VIII.2011–  XII.2013, T. G. Carvalho, J.P.C. Pinto Neto& P.K.M. Almeidacoll., deposited in CZPB AR126; male paratypefrom the same locality,  15.XII.2015, T. G. Carvalhocoll., IBSP 233864.   Etymology.The species name is a word in Portuguese that identifies residents or natives from the city of Manaus.  Other material examined.  BRAZIL.  Amazonas: Manaus, Reserva Florestal Adolpho Ducke[ 2°57’48.0”S, 59°55’22.2”W], 1 female,  15.XII.1994, T. Gasniercoll. ( IBSP 14528);  Bosque da Ciência INPA, [ 3°05’50.8”S, 59°59’16.1”W], 1 female,  9.VIII.2018, DNA-voucher, S. Arizalacoll. ( IBSP 258333);  Iranduba, Lago Janauari,  3°20’S, 60°17’W, 1 male,  14.I.1988, J. Adis et al.coll. ( IBSP 120219); same locality and collectors,  1 female,  31.VIII.1987( IBSP 120277); same locality and collectors,  1 male,  30.IX.1987( IBSP 120218); Rio Preto da Eva, Fazenda Dimona, Reserva PDBFF, [ 2°21’S, 59°57’W] , 1 male,  27.XII.2001, F.N.N. Regocoll. ( IBSP 97263).   Diagnosis.Males of  Acanthoctenus manauara  sp. nov.( Figs 44D–E, 45A–B) resemble those of  A. gaujoni( Figs 22D–E, 23A–B) by the palpal tibia elongated, at least 2.5 times longer than wide, and RTA elongated, longer than wide. It can be distinguished by the median apophysis basally thin, the apex more than 3 times wider than the base.  A. gaujonipresents a suboval median apophysis, the apex 1.5 times wider than the base. Females of  Acanthoctenus manauara  sp. nov.( Figs 45C–D, 46D, 47) resemble those of  A. gaujoni( Figs 23C–D, 24D, 25A–B) by the median sector subpentagonal, wide anteriorly, extending into the atrium, and the copulatory ducts bended apically. It can be distinguished by the lateral sectors’ anterior border forming a 40° angle with the median sector’s longitudinal axis, and the atrium with a single anterior border.  A. gaujonipresents the anterior border of the lateral sectors forming a 60° angle with the median sector’s longitudinal axis, and divided anterior border in the atrium.   Description. Male ( paratypeIBSP 233864).Total length 7.93. Carapace 3.84 long and 3.29 wide. Clypeus 0.10 high. Eye diameters: AME 0.24, ALE 0.15, PME 0.28, PLE 0.32. Legs measurements: I: femur 5.98/ patella 1.82/ tibia 7.03/ metatarsus 6.41/ tarsus 1.91/ total 23.15; II: 5.13/ 1.87/ 4.89/ 5.33/1.63/ 18.85; III: 4.12/ 1.45/ 3.36/ 4.21/ 1.52/ 14.66; IV: 5.73/ 1.49/ 5.10/ 6.58/ 1.83/ 20.95. Leg formula:1423. Leg spination: tibia I and II v-2-2-2- 2-2-2-2-2-2, p-1-0-1-1-1, r-1-1-0-1-1, III and IV v-2-2-2, p-1-1-1, r-0-1-1-1; metatarsus I and II v-2-2-2-2-2, p-1- 0-1, r-0-1-1, III and IV v-2-2-2, p-1-1-1-1, r-1-1. Palp ( Figs 44D–E, 45A–B): tibia shorter than cymbium, slightly curved; RTA robust and elongated; cymbium elongated and with retrobasal projection; embolus elongated, cylindrical, and curved; conductor hyaline and following the tip of embolus; median apophysis laminar, elongated, narrow at the base and wider at the top, with a proapical hook and retrolateral ridge.   FIGURE 44.  Acanthoctenus manauara  sp. nov., male paratype (IBSP 233864). A–C, habitus; A, dorsal; B, ventral; C, frontal. D–E, male palp; D, ventral; E, retrolateral.   FIGURE 45.  Acanthoctenus manauara  sp. nov., copulatory organs. A–B, male palp (paratype, IBSP 233864); A, ventral; B, retrolateral. C–D, female genitalia (holotype, CZPB AR126); C, epigynum, ventral. D, internal genitalia, dorsal.   FIGURE 46.  Acanthoctenus manauara  sp. nov., female holotype (CZPB AR126). A–B, habitus; A, dorsal; B, ventral; C, frontal. D, epigynum, ventral.  Female ( holotypeCZPB AR126).Total length 9.68. Carapace 3.95 long and 3.14 wide. Clypeus 0.28 high. Eye diameters: AME 0.25, ALE 0.19, PME 0.27, PLE 0.30. Leg measurements: I: femur 4.37/ patella 1.88/ tibia 4.81/ metatarsus 4.08/ tarsus 1.34/ total 16.48; II: 4.09/ 1.73/ 3.75/ 3.58/ 1.14/ 14.29; III: 3.38/ 1.27/ 2.59/ 2.80/ 1.21/ 11.25; IV: 3.95/ 1.20/ 3.58/ 3.88/ 1.59/ 14.2. Leg formula 1243. Leg spination: tibia I and II v-2-2-2-2-2-2-2-2-2, p- 1-1-1-1-1, r-0-1-1-0, III v-2-2-2, p-1-1-1, r-1-1-1, IV v-2-2-2, p-1-1, r-1-1; metatarsus I and II v2-2-2-2-2, p-1, r-1, III v-2-2-2, p-1-1-, r-1-1, IV v-2-2-2, p1-1-1, r-0-1-0. Epigynum ( Figs 45C–D, 46D, 47): median sector subpentagonal, wide anteriorly extending into the atrium, projected posteriorly; anterior border of the lateral sectors straight; atrium massive, subquadrangular; copulatory ducts bended apically, S-shaped; spermathecae head quote-shaped, with apical glandular openings, spermathecae base curled; fertilization ducts tubular, slanting outwards.  Variation:Four females: total body length 7.26–8.61, carapace length 2.47–4.38; two males: 7.70–8.72, 3.37 –4.16.  Natural history.Females of this species have been collected inside shelters under leaf sheath and dry leaves of palms and similar plants (  AstrocaryumG. Mey;  AttaleaKunt;  MusaL.; and  MauritiaL., Fig. 2B).   Distribution.Northern Brazil, state of Amazonas ( Fig. 10B). 3028878305 2011-08 2013-12 2011-08 T G. Carvalho & J. P. C. Pinto Neto & P. K. M. Almeida Brazil Amazonas -3.0981388 Female 1 -59.96886 Manaus 45 46 1 holotype 3028878306 [151,1426,798,825] 2015-12-15 CZPB G. Carvalho Brazil 45 46 AR126 1 paratype 3028878314 1994-12-15 T T. Gasnier Brazil -2.9633334 BRAZIL 1 -59.922836 45 46 IBSP 14528 1 1 3028878301 2018-08-09 INPA Gasnier Brazil Bosque da Ciencia Lago Janauari 45 46 IBSP 14528 1 1 3028878322 [1152,1432,979,1005] 2018-08-09 INPA Gasnier Brazil Bosque da Ciencia Lago Janauari 45 46 IBSP 14528 1 1 3028878324 [151,1315,1015,1041] 1988-01-14 IBSP J. Adis Brazil -3.3333333 Iranduba 1307 -60.283333 Lago Janauari 45 46 IBSP 120219 1 1 3028878335 1987-08-31 IBSP J. Adis Brazil -3.3333333 Iranduba 1307 -60.283333 Lago Janauari 45 46 IBSP 120277 1 1 3028878333 1987-09-30 PDBFF Brazil Reserva Rio Preto da Eva Fazenda Dimona 45 46 IBSP 120218 1 1 3028878331 [766,1379,1086,1114] 2001-12-27 IBSP F. N. N. Rego Brazil 45 46 IBSP 97263 1 1