Amazonius germani, 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 : 115-118

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.6822196
persistent identifier	https://treatment.plazi.org/id/03BF87CE-A344-FF91-FF5E-FF37FF02F85B
treatment provided by	Plazi
scientific name	Amazonius germani
status	gen. nov.

Treatment

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

( Figs 19 View FIGURE 19 , 311 View FIGURE 311 , 360–361 View FIGURES 353–361 , 398–417 View FIGURES 398–405 View FIGURES 406–409 View FIGURES 410–415 View FIGURES 416–417 )

Tapinauchenius gigas: Schmidt 1994c: 2 View in CoL , figs 1–3 (misidentification); Schmidt 2003: 206, figs 612–614 (misidentification); Auer, Huber and Bochtler 2007: 23, figs 5, 33–34, 48 (misidentification).

Pseudoclamoris gigas: Hüsser 2018: 73 , fig. 13B (habitus) (misidentification); Cifuentes & Perafán 2020: 109, figs 4.4C–D, 4.6C, 4.8E (misidentification).

Diagnosis. Females of Amazonius germani n. gen. n. sp. resemble those of A. giovaninii n. gen. n. sp. by the spermathecae with an apical subdivided lobe ( Fig. 405 View FIGURES 398–405 ). They can be distinguished by the femora I and II covered ventrally with normal long and slender setae ( Figs 360–361 View FIGURES 353–361 ). Males resemble those of A. elenae n. comb. by the male palpal bulb embolus with an accentuated curvature to retrolateral side distally ( Fig. 401 View FIGURES 398–405 ). They differ by the embolus tapering towards the tip ( Figs 398–399, 401 View FIGURES 398–405 ).

Etymology. The specific epithet is a patronym in honor of German Amat., a Colombian entomologist, exdirector of the Natural Sciences Institute of the National University of Colombia, who supported the research of entomology in Colombia.

Type material. Holotype female from Brazil, state of Pará , Almeirim (1°01’33.1S, 52°34’02.8”W), T. Gardner and Ribeiro Junior col., 22 June 2005 ( MPEG 007435 View Materials ) GoogleMaps . Paratype male, from French Guiana [4°54’N, 52°19’W], Verdez leg. ( SMF 38041) GoogleMaps .

Other material examined. BRAZIL: Amazonas: Careiro Castanho , km 100 BR319 , Geoma 2, area 1, acampamento [3°41’S, 60°19’W], 2 males, L. T. Miglio , 6–7 July 2007 ( INPA 9111 View Materials ); GoogleMaps Pará: Juruti, Platô Capiranga, Linha 168E (02°28’22.1”S, 56°12’29.4”W), 1 male, ( MPEG 015638 View Materials ); GoogleMaps Rondônia: Porto Velho, Mutum [8°33’S, 63°42’W], Caiçara, transecto 3, aleatoria, 1 male, Equipe Jirau 1, March 2010 ( MZUSP 33835 View Materials ) GoogleMaps .

Description. Female holotype (MPEG 007435). Total length, not including chelicerae or spinnerets 36.79. Carapace 14.18 long, 13.47 wide, 2.77 high. Chelicera: 8.01 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 12.39 7.15, 10.45, 8.78, 5.60, 44.37; II: 11.14, 6.59, 8.80, 7.71, 4.96, 39.20; III: 10.46, 6.00, 7.88, 8.55, 4.87, 37.76; IV: 13.37, 6.39, 11.86, 12.98, 5.20, 49.80; Palp: 8.31, 4.69, 6.15, -, 5.08, 24.23. Midwidths: femora I–IV= 2.76, 2.91, 3.00, 2.68, palp= 1.97; patellae I–IV= 2.74, 2.77, 2.83, 2.88, palp= 2.31; tibiae I–IV= 2.56, 2.59, 2.54, 2.61, palp= 2.04; metatarsi I–IV= 2.09, 1.94, 1.85, 1.75; tarsi I–IV= 2.02, 2.06, 1.92, 1.85, palp= 1.78. Abdomen: 22.61 long, 13.47 wide. Spinnerets: PMS, 2.28 long, 1.02 wide, 0.57 apart; PLS, 2.95 basal, 2.38 middle, 3.51 distal; midwidths 1.45, 1.51, 1.14, respectively. Carapace: 1.05 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 1.97 wide. Eyes: eye tubercle 0.45 high, 2.15 long, 3.27 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.78, ALE 0.76, PME 0.48, PLE 0.72, AME–AME 0.61, AME–ALE 0.24, AME–PME 0.26, ALE–ALE 2.28, ALE–PME 0.49, PME–PME 1.92, PME–PLE 0.19, PLE–PLE 2.49, ALE–PLE 0.27. Maxilla: length to width 1.67. Cuspules: ca. 247 spread over ventral inner heel. Labium: 2.18 long, 2.55 wide, with ca. 211 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 11 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. 409 View FIGURES 406–409 ). Sternum: 7.08 long, 6.31 wide.

Legs: Formula: IV I II III. Length leg IV to leg I: 1.12. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. 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 1 p, 2; I: 2/0; II 2/0; III 3/2; IV 2/2. 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. 408 View FIGURES 406–409 ).

Spermathecae: Two spermathecae completely separated, slightly curved apically with a subdivided apical lobe ( Fig. 405 View FIGURES 398–405 ).

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

Description. Male paratype (SMF 38041). Total length, not including chelicerae or spinnerets 28.32. Carapace 12.50 long, 11.49 wide, 3.53 high. Chelicera: 7.20 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 14.99, 7.05, 12.67, 12.45, 6.12, 53.28; II: 13.67, 6.39, 11.33, 11.63, 5.73, 48.75; III: 11.78, 5.46, 9.92, 11.47, 5.44, 44.07; IV: 14.70, 6.32, 13.94, 16.23, 5.77, 56.96; Palp: 8.38, 4.49, 7.69, -, 2.55, 23.11. Midwidths: femora I–IV= 2.50, 2.50, 2.47, 2.45, palp= 1.75; patellae I–IV= 2.36, 2.45, 2.29, 2.23, palp= 1.81; tibiae I–IV= 1.93, 1.76, 1.76, 1.90, palp= 1.81; metatarsi I–IV= 1.38, 1.32, 1.30, 1.20; tarsi I–IV= 1.26, 1.21, 1.31, 1.27, palp= 1.73. Abdomen: 15.42 long, 9.78 wide. Spinnerets: PMS, 1.83 long, 0.68 wide, 0.47 apart; PLS, 2.88 basal, 2.23 middle, 2.85 distal; midwidths 1.04, 0.99, 0.73, respectively. Carapace: 1.09 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 1.50 wide. Eyes: eye tubercle 0.37 high, 1.99 long, 2.84 wide. Clipeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.70, ALE 0.65, PME 0.40, PLE 0.59, AME–AME 0.40, AME–ALE 0.20, AME–PME 0.21, ALE–ALE 2.02, ALE–PME 0.43, PME–PME 1.63, PME–PLE 0.10, PLE–PLE 2.16, ALE–PLE 0.25. Maxilla: length to width 1.98. Cuspules: ca. 206 spread over ventral inner heel. Labium: 1.60 long, 2.20 wide, with ca. 153 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 11 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. 407 View FIGURES 406–409 ). Sternum: 6.80 long, 5.41 wide.

Legs: Formula: I = IV II III. Length leg IV to leg I: 1.07. Scopula: Tarsi I–IV fully scopulate. Metatarsi I–II fully scopulate; III 2/3 distal; IV 1/3 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: 2/0; III 2/2; IV 2/2. 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. 406 View FIGURES 406–409 ). Tibial apophysis ( Figs 402–404 View FIGURES 398–405 ): two processes, retrolateral longer than prolateral, one spine at side of prolateral, one at apical retrolateral process and another on its median retrolateral area. A subtriangular protuberance behind retrolateral process. Metatarsus I folds on retrolateral side of tibial apophysis.

Palp ( Figs 398–401 View FIGURES 398–405 ): tegulum length 1.22, width 1.50, embolus proximal width 0.59, length 3.75. Embolus proximal portion straight. Embolus length to tegulum length: 3.07. Embolus tapering from the base to the tip, with an accentuated curvature to retrolateral side distally. Embolus tip roughly straight.

Color pattern (preserved in alcohol): Carapace, legs, palpal femora, and tibiae light brown, except for orange tarsi. Whitish rings on distal femora, patellae, tibiae and etatarsi. Two whitish stripes over dorsal femora and patellae of all legs. Abdomen beige with three faded dark stripes on both lateral areas. Coxae, sternum, maxillae and labium light brown, a littler darker on anterior half of coxae I and the maxillae.

Distribution. Brazil and French Guiana ( Fig. 311 View FIGURE 311 ).

Remarks. See remarks under Tapinauchenius plumipes above concerning the types of T. gigas Caporiacco, 1954 . Tapinauchenius gigas was redescribed by Schmidt (1994c) without revising the types, which are conspecific with T. plumipes . The specimens redescribed by Schmidt (1994c) are a new species which is herein described and named.