Amazonius giovaninii Cifuentes & Bertani, 2022, n. gen.
Creators: name: Cifuentes, Yeimy
name: Bertani, Rogerio
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theraphosidae
Amazonius
Amazonius giovaninii

description: Amazonius giovaninii n. gen. n. sp.
(Figs 19, 311, 357–359, 364–397)
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). They can be distinguished by the femora I and II covered ventrally with short stiff setae (Figs 357–359). Males resemble those of A. burgessi n. comb. by the male palpal bulb embolus roughly straight with a slight curvature distally (Fig. 367). They differ by the embolus thicker narrowing abruptly on its distal portion (Fig. 367).
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); paratype male from Brazil, Amazonas, Manaus, UFAM [3°05’S, 59°58’W], M. Q. Almeida col. 28 May 2007 (INPA 9105).
Other material examined. BRAZIL: Amazonas: no locality (P6 T2 MC), 1 male (INPA 9104); Manaus [3°05’S, 59°58’W], 1 male, A. Coletto, December 2004 (INPA 9103); Manaus [3°05’S, 59°58’W], 1 female, F.J.A. Peralta col., 06 July 1991 (INPA 4880); Manaus, 1 female, without additional data (IBSP 3814); 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); 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); 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); 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); 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); Presidente Figueiredo, Balbina UHE [1°54’S, 59°28’W], Uatumã river, 1 female, April 1985, in Inajá tree (INPA 9110).
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). 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). 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).
Spermathecae (Fig. 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). 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). Tibial apophysis (Figs 368–370): 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).
description: Published as part of 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), pp. 1-123 in Zootaxa 5101 (1) on pages 111-114, DOI: 10.11646/zootaxa.5101.1.1, http://zenodo.org/record/6253223