Amazonius giovaninii, Cifuentes & Bertani, 2022

Cifuentes, Yeimy & Bertani, Rogerio, 2022, Taxonomic revision and cladistic analysis of the tarantula genera Tapinauchenius Ausserer, 1871, Psalmopoeus Pocock, 1985, and Amazonius n. gen. (Theraphosidae, Psalmopoeinae), Zootaxa 5101 (1), pp. 1-123 : 111-114

publication ID	https://doi.org/ 10.11646/zootaxa.5101.1.1
publication LSID	lsid:zoobank.org:pub:0FD7126B-77A7-4B99-A0E7-04298368C3C4
DOI	https://doi.org/10.5281/zenodo.6822194
persistent identifier	https://treatment.plazi.org/id/03BF87CE-A358-FF95-FF5E-FEC4FDC1F87B
treatment provided by	Plazi
scientific name	Amazonius giovaninii
status	gen. nov.

Treatment

Amazonius giovaninii View in CoL n. gen. n. sp.

( Figs 19 View FIGURE 19 , 311 View FIGURE 311 , 357–359 View FIGURES 353–361 , 364–397 View FIGURES 364–371 View FIGURES 372–375 View FIGURES 376–387 View FIGURES 388–391 View FIGURES 392–397 )

Diagnosis. Females of Amazonius giovaninii n. gen. n. sp. resemble those of A. germani n. gen. n. sp. by the spermathecae having a single subsegmented apical lobe ( Fig. 371 View FIGURES 364–371 ). They can be distinguished by the femora I and II covered ventrally with short stiff setae ( Figs 357–359 View FIGURES 353–361 ). Males resemble those of A. burgessi n. comb. by the male palpal bulb embolus roughly straight with a slight curvature distally ( Fig. 367 View FIGURES 364–371 ). They differ by the embolus thicker narrowing abruptly on its distal portion ( Fig. 367 View FIGURES 364–371 ).

Etymology. The specific epithet is a patronym in honor of Dener Giovanini, a Brazilian environmentalist and founder of the RENCTAS—National Network to Combat Trafficking in Wild Animals.

Type material. Holotype female from Brazil, Amazonas , Manaus , Igarapé Jacare , off west side upper Rio Taruma-Açu (02°53’49.92’’S, 60°7’16.08” W), N. Gordon col., Nov 1996, in thatched roof of hut ( MNRJ 7715 View Materials ); GoogleMaps paratype male from Brazil, Amazonas, Manaus, UFAM [3°05’S, 59°58’W], M. Q. Almeida col. 28 May 2007 ( INPA 9105 View Materials ). GoogleMaps

Other material examined. BRAZIL: Amazonas : no locality (P6 T2 MC) , 1 male ( INPA 9104 View Materials ) ; Manaus [3°05’S, 59°58’W], 1 male, A. Coletto, December 2004 ( INPA 9103 View Materials ) GoogleMaps ; Manaus [3°05’S, 59°58’W], 1 female, F.J.A. Peralta col., 06 July 1991 ( INPA 4880 View Materials ) GoogleMaps ; Manaus , 1 female, without additional data ( IBSP 3814 View Materials ) ; Manaus , Igarapé Jacare (02°53’49.92’’ S, 60°7’16.08’’ W), off west side upper Rio Tarumã-Açu , 1 male, 1 female, J. Calavanti col., 01 November 1996 ( MNRJ 7716 View Materials ) GoogleMaps ; ZF2, km 14, Malaise grande, no chão (2°35’21”S, 60°06’55”W), 1 male, J. A. Rafael and F. F. Xavier ( INPA 9106 View Materials ) GoogleMaps ; Reserva PDBFF, km 41 [2°20’S, 60°0’W], arm. Suspensa / sub-bosque, 1 male, R. Querino, S. Costa, A. Nazareno, L. Queiroz, M. Feitosa and J. Deus, 21–22 July 2004 ( INPA 9107 View Materials ) GoogleMaps ; Reserva Ducke [2°55’S, 59°58’W], Arm. Malaise , Platô Norte / Sul, 1 male, G. Freitas and M. Feitosa, 14 February to 06 March 2007 ( INPA 9108 View Materials ) GoogleMaps ; Reserva Ducke (2°55’4.35”S, 59°58’38W), Malaise, turma 2017, 1 female, D. A. Lima and N. T. B. Antunes, 15 October to 09 December 2016 ( INPA 9109 View Materials ) GoogleMaps ; Presidente Figueiredo , Balbina UHE [1°54’S, 59°28’W], Uatumã river, 1 female, April 1985, in Inajá tree ( INPA 9110 View Materials ) GoogleMaps .

Description. Female holotype (MNRJ 7715). Total length, not including chelicerae or spinnerets 35.44. Carapace 13.89 long, 11.78 wide, 7.97 high. Chelicera: 7.68 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 11.88, 7.13, 9.58, 8.81, 5.08, 42.48; II: 11.13, 5.77, 8.46, 8.29, 5.52, 39.17; III: 9.37, 5.25, 7.26, 8.04, 4.75, 34.67; IV: 11.66, 5.86, 10.67, 10.97, 5.10, 44.26; Palp: 7.96, 4.65, 5.38, -, 6.39, 24.38. Midwidths: femora I–IV= 2.30, 2.50, 2.59, 2.23, palp= 1.83; patellae I–IV= 2.58, 2.44, 2.36, 2.34, palp= 2.13; tibiae I–IV= 2.42, 2.15, 2.08, 2.12, palp= 1.93; metatarsi I–IV= 2.06, 1.77, 1.65, 1.47; tarsi I–IV= 1.96, 1.85, 1.66, 1.56, palp= 1.81. Abdomen: 20.88 long, 13.07 wide. Spinnerets: PMS, 0.97 long, 0.40 wide, 0.67 apart; PLS, 1.2 basal, 0.93 middle, 1.23 distal; midwidths 0.74, 0.77, 0.49, respectively. Carapace: 1.18 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 1.63 wide. Eyes: eye tubercle 0.62 high, 1.85 long, 3.26 wide. Clypeus absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.72, ALE 0.78, PME 0.50, PLE 0.67, AME–AME 0.46, AME–ALE 0.30, AME–PME 0.22, ALE–ALE 2.16, ALE–PME 0.42, PME–PME 1.76, PME–PLE 1.18, PLE–PLE 2.52, ALE–PLE 0.27. Maxilla: length to width 1.63. Cuspules: ca. 197 spread over ventral inner heel. Labium: 1.05 long, 2.38 wide, with ca. 150 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 9 teeth in row. Strikers: Long and short filiform setae, disposed without discernible pattern on a ventral-basal portion of chelicera before the teeth row ( Fig. 375 View FIGURES 372–375 ). Sternum: 6.92 long, 5.90 wide.

Legs: Formula: I = IV II III. Length leg IV to I: 1.04. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. Metatarsi I–II fully scopulate; III 1/2 distal; IV 1/4 distal. IV divided by rows of setae. Femora I ventrally and laterally with short scale like setae ( Figs 357–359 View FIGURES 353–361 ). Spination: Palps and legs (ventral apical: tibia/metatarsi): Palp 0; I: 0/0; II 2/0; III 0/2; IV 0/2. Maxillary stridulatory organ: weakly developed, composed of slightly thick setae with rugose aspect, not disposed on an ordered line, grouped forming an oval patch on the prolateral face of the maxillae ( Fig. 374 View FIGURES 372–375 ).

Spermathecae ( Fig. 371 View FIGURES 364–371 ): Two spermathecae completely separated, slightly curved apically with a subdivided apical lobe.

Color pattern (preserved in alcohol): Carapace brown, leg and palpal femora brown, abdomen with a central line connected with 2–3 transverse lateral stripes.

Description. Male (INPA 9105). Total length, not including chelicerae or spinnerets 29.44. Carapace 11.33 long, 11.13 wide, 2.99 high. Chelicera: 6.00 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 14.80, 7.30, 12.87, 11.93, 6.42, 53.32; II: 13.08, 5.96, 11.09, 10.66, 5.52, 46.31; III: 10.82, 4.77, 8.65, 10.03, 4.57, 38.84; IV: 13.55, 5.60, 11.92, 13.46, 4.92, 49.45; Palp: 8.58, 4.33, 7.60, -, 2.38, 22.89. Midwidths: femora I–IV= 2.31, 2.21, 2.15, 2.09, palp= 1.74; patellae I–IV= 2.03, 2.11, 1.92, 1.93, palp= 1.65; tibiae I–IV= 1.59, 1.48, 1.52, 1.68, palp= 1.53; metatarsi I–IV= 1.24, 1.13, 1.06, 1.01; tarsi I–IV= 1.06, 1.15, 1.14, 1.10, palp= 1.80. Abdomen: 16.16 long, 9.65 wide. Spinnerets: PMS, 1.50 long, 0.65 wide, 0.37 apart; PLS, 2.32 basal, 1.94 middle, 2.78 distal; midwidths 0.91, 0.94, 0.83, respectively. Carapace: 1.02 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 1.09 wide. Eyes: eye tubercle 0.38 high, 2.00 long, 2.84 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.80, ALE 0.69, PME 0.46, PLE 0.61, AME–AME 0.44, AME–ALE 0.14, AME–PME 0.13, ALE–ALE 1.94, ALE–PME 0.17,

PME–PME 1.59, PME–PLE 0.12, PLE–PLE 2.07, ALE–PLE 0.50. Maxilla: length to width 1.52. Cuspules: ca. 155 spread over ventral inner heel. Labium: 1.49 long, 2.02 wide, with ca. 117 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 9 teeth in row. Strikers: Long and short filiform setae, disposed without discernible pattern on a ventral-basal portion of chelicera before and beginning of teeth row ( Fig. 373 View FIGURES 372–375 ). Sternum: 6.18 long, 4.81 wide.

Legs: Formula: I = IV II III. Length leg IV to leg I: 0.93. Scopula: Tarsi I–IV fully scopulate. Metatarsi I–II fully scopulate; III 2/3 distal; IV 1/2 distal. IV divided by rows of setae. Spination: Palps and legs (ventral apical: tibia/metatarsi): Palp 0; I: 1 behind retrolateral process of tibial apophysis; II: 3/0; III 2/2; IV 1/2. Maxillary stridulatory organ: weakly developed, composed of slightly thick setae with rugose aspect, not disposed on an ordered line, grouped like a spot on prolateral face of the maxillae ( Fig. 372 View FIGURES 372–375 ). Tibial apophysis ( Figs 368–370 View FIGURES 364–371 ): two processes, retrolateral longer than prolateral, one spine at side of prolateral, one at the apical part of retrolateral process and another on its median area. A rounded protuberance behind retrolateral process. Metatarsus I sinuous, folds on retrolateral side of tibial apophysis.

Palp (figs 364–367): tegulum length 1.04, width 1.2, embolus proximal width 0.64, length 4.11 Embolus proximal portion straight. Embolus length to tegulum lengh: 3.95. Embolus roughly straight with a slight curvature distally, narrowing abruptly on its distal portion. Embolus tip roughly straight.

Color pattern (preserved in alcohol): Carapace, chelicerae, legs, labium, sternum and maxillae light brown, abdomen lighter.

Distribution. Brazil ( Fig. 311 View FIGURE 311 ).