Amazonius germani 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 germani

description: Amazonius germani n. gen. n. sp.
(Figs 19, 311, 360–361, 398–417)
Tapinauchenius gigas: Schmidt 1994c: 2, 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). They can be distinguished by the femora I and II covered ventrally with normal long and slender setae (Figs 360–361). Males resemble those of A. elenae n. comb. by the male palpal bulb embolus with an accentuated curvature to retrolateral side distally (Fig. 401). They differ by the embolus tapering towards the tip (Figs 398–399, 401).
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). Paratype male, from French Guiana [4°54’N, 52°19’W], Verdez leg. (SMF 38041).
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); Pará: Juruti, Platô Capiranga, Linha 168E (02°28’22.1”S, 56°12’29.4”W), 1 male, (MPEG 015638); Rondônia: Porto Velho, Mutum [8°33’S, 63°42’W], Caiçara, transecto 3, aleatoria, 1 male, Equipe Jirau 1, March 2010 (MZUSP 33835).
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). 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).
Spermathecae: Two spermathecae completely separated, slightly curved apically with a subdivided apical lobe (Fig. 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). 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). Tibial apophysis (Figs 402–404): 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): 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).
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.
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 115-118, DOI: 10.11646/zootaxa.5101.1.1, http://zenodo.org/record/6253223