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