Psalmopoeus irminia Saager, 1994

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 : 88-92

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.6316516

persistent identifier

https://treatment.plazi.org/id/03BF87CE-A361-FFBF-FF5E-F937FCD1F95B

treatment provided by

Plazi

scientific name

Psalmopoeus irminia Saager, 1994
status

 

Psalmopoeus irminia Saager, 1994

( Figs 19 View FIGURE 19 , 145 View FIGURE 145 , 276–292 View FIGURES 276–283 View FIGURES 284–287 View FIGURES 288–292 )

Psalmopoeus irminia Saager, 1994: 59 , figs 2–15, 6A, 7–11); Schmidt, Bullmer & Thierer-Lutz 2006: 8, figs 11, 13; Mendoza 2014: 734, fig. 17; Bertani et al. 2016: 1, figs 3–5; Cifuentes & Perafán 2020: 109, fig. 4.8C; World Spider Catalog 2021.

Diagnosis. Females of P. irminia resemble those of P cambridgei and P. pulcher by the elongate, non-triangular spermathecae, with straight apex having apical lobe and lobes on central area ( Fig. 283 View FIGURES 276–283 ). They differ by the shorter and rounded apical lobe, and rounded lobes on central area not protruding ( Fig. 283 View FIGURES 276–283 ). Males resemble those of P. cambridgei by the embolus 3.0–3.5 times tegulum length ( Fig. 276 View FIGURES 276–283 ). They can be distinguished from those from P. cambridgei by the embolus slender and distal third curving gently to retrolateral side ( Fig.279 View FIGURES 276–283 ). Additionally, males and females differ from those of all other species, except P. cambridgei , by the color pattern having a yellow orange line from retrolateral side of metatarsi to its center, and orange spot on dorsal tarsi ( Figs 288–289, 291 View FIGURES 288–292 ). Females with one dark vertical central stripe connecting with at least 4 gray transverse lines ( Figs 288, 291 View FIGURES 288–292 ). From P. cambridgei they differ by the darker body and more conspicuous pattern on the abdomen and legs ( Figs 288, 291 View FIGURES 288–292 ).

Type material. Holotype male, paratype male, parts of a male, 4 exuvia and a living female that should be deposited after death, from Venezuela, Bolivar, Gran Sabana, Santa Elena de Uairén, San Ignacio [5°00’N, 61°08’W], at Zoologischem Museum Hamburg, not examined. GoogleMaps

Material examined. VENEZUELA: Amazonas: Cejal, Orinoco river [5°25’N, 67°43’W], silk retreat in low tree cavity, 1 male 1 female, R. West col., February 1992 ( MNRJ 7709 View Materials ); GoogleMaps 1 male, same collector and data ( MZUSP 76541 View Materials ) GoogleMaps ; Bolívar: Santa Elena de Uairén, 1 male, S. Marshall col. 21 January 1979 ( MNRJ 7706 View Materials ) ; BRAZIL: Roraima: Amajari, Tepequém (3°44’13.4”N, 61°43’33.2”W), 1 female, R. Bertani, M. Q. Almeida and F. F. Xavier, 27 June 2018 ( MZUSP 76542 View Materials ); GoogleMaps Paracaima, near right margin Miang river , (04°29’44”N 61°07’27”W), 1 female, M. A. Freitas, A. S. Santos, A. Abegg & F. Ortíz col., 12 August 2015 ( MNRJ 6872 View Materials ) GoogleMaps .

Redescription. Male (MNRJ 7709) Total length, not including chelicerae or spinnerets 30.98. Carapace 14.60 long, 12.58 wide, 7.71 high. Chelicera: 6.85 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 17.91, 9.44, 16.77, 15.98, 7.28, 67.38; II: 17.15, 8.34, 15.13, 15.30, 7.15, 63.07; III: 12.70, 5.81, 11.09, 12.39, 5.77, 47.76; IV: 15.48, 6.14, 13.94, 14.63, 6.11, 56.30; Palp: 10.08, 5.47, 9.14, -, 3.37, 28.06. Midwidths: femora I–IV= 2.52, 2.10, 2.03, 1.54, 1.33, palp= 1.92; patellae I–IV= 2.10, 2.37, 2.13, 2.25, palp = 1.96; tibiae I–IV= 2.03, 2.10, 1.66, 1.70, palp = 1.95; metatarsi I–IV= 1.54, 1.55, 1.25, 1.29; tarsi I–IV= 1.33, 1.36, 1.33, 1.24, palp = 1.93. Abdomen: 16.01 long, 8.70 wide. Spinnerets: PMS, 1.47 long, 0.47 wide, 0.50 apart; PLS, 1.48 basal, 1.06 middle, 1.81 distal; midwidths 0.82, 0.69, 0.54, respectively. Carapace: 1.16 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 0.75 wide. Eyes: eye tubercle 0.78 high, 2.37 long, 4.11 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.94, ALE 0.91, PME 0.57, PLE 0.77, AME–AME 0.63, AME–ALE 0.31, AME–PME 0.26, ALE– ALE 2.31, ALE–PME 0.27, PME–PME 2.25, PME–PLE 0.23, PLE–PLE 2.96, ALE–PLE 0.34. Maxilla: length to width 1.78. Cuspules: 143 spread over ventral inner heel. Labium: 1.47 long, 1.56 wide, with ca. 158 cuspules spaced ca. 1 diameter from each other on anterior third. Chelicera: basal segment with 9 teeth in row. Short and ordered coverage setae densely grouped on the retrolateral side of the chelicera. Strikers: line of 6 spaced, long filiform setae, disposed on ventralbasal portion of chelicerae before the teeth row ( Fig. 285 View FIGURES 284–287 ). Sternum: 7.10 long, 5.69 wide.

Legs: Formula: I = II = IV III. Length leg IV to leg I: 0.84. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. Metatarsi I–II fully scopulate; III 3/4 distal; IV 1/4 distal. IV divided by rows of setae. Spination: Palps and legs (ventral apical: tibia/metatarsi): Palp: 0; I: 1 behind tibial apophysis, II: 2/0; III: 2/3, IV: 2/2. Maxillary stridulatory organ composed of 11 thick setae forming a straight crescent line, setae increase in size from the internal to external side of maxillae; longest ones flattened laterally, tips of setae with rugous texture, 12–14 slender setae after thickest ones ( Fig. 284 View FIGURES 284–287 ). Short and ordered coverage setae densely grouped on the retrolateral side of the maxillae/coxae, trochanter, proximal part of palp femur and prolateral side of the same articles of leg I. Tibial apophysis ( Figs 280–282 View FIGURES 276–283 ): two processes, retrolateral longer than prolateral, one spine at side of prolateral, one on apical part of retrolateral process. A small rounded protuberance behind retrolateral process. Metatarsus I folds on retrolateral side of tibial apophysis.

Palp ( Figs 276–279 View FIGURES 276–283 ): tegulum length 1.23, width 1.78, embolus proximal width 0.77, embolus length 4.05. Embolus proximal portion straight. Embolus length to tegulum length: 3.29. Embolus distal third curving gently to ventral and retrolateral sides. Embolus tapers to its tip ending in a roughly straight tip.

Color pattern (preserved in alcohol): Carapace brown, femur of palp and metatarsi with an orange line from the retrolateral side toward the center, tarsi with an orange dorsal spot.

Redescription. Female (MNRJ 7709): Total length, not including chelicerae or spinnerets 43.21. Carapace: 16.97 long, 15.05 wide, 9.48 high. Chelicera: 8.88 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 15.57, 9.44, 13.25, 11.91, 6.03, 56.2; II: 14.10, 8.75, 12.37, 11.64, 6.16, 53.02; III: 12.37, 7.01, 9.85, 10.47, 5.82, 45.52; IV: 14.87, 7.22, 13.18, 13.24, 5.9, 54.41; Palp: 10.2, 5.97, 7.64, -, 7.31, 31.12. Midwidths: femora I–IV= 3.50, 3.08, 3.41, 3.01, palp = 2.45; patellae I–IV= 3.07, 3.11, 2.90, 2.86, palp= 2.58; tibiae I–IV= 3.03, 2.77, 2.34, 2.66, palp= 2.44; metatarsi I–IV= 2.61, 2.13, 1.91, 1.75; tarsi I–IV= 2.16, 2.20, 2.29, 2.02, palp= 2.40. Abdomen: 24.46 long, 14.54 wide. Spinnerets: PMS, 2.07 long, 1.00 wide, 0.86 apart; PLS, 2.94 basal, 1.43 middle, 2.61 distal; midwidths 1.30, 1.02, 0.64, respectively. Carapace: 1.13 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 0.59 wide. Eyes: eye tubercle 1.34 high, 2.57 long, 3.80 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.70, ALE 0.83, PME 0.58, PLE 0.67, AME–AME 0.66, AME–ALE 0.43, AME–PME 0.27, ALE–ALE 2.78, ALE–PME 0.52, PME–PME 2.06, PME–PLE 0.16, PLE–PLE 2.89, ALE–PLE 0.35. Maxilla: length to width 1.53. Cuspules: ca. 191 spread over ventral inner heel. Labium: 2.65 long, 2.99 wide, with ca. 190 cuspules spaced ca. 1 diameter from each other on anterior third. Chelicera: basal segment with 10 teeth in row. Short and ordered coverage setae densely grouped on the retrolateral side of the chelicera. Strikers: line of 5–9 spaced long filiform setae, disposed on ventralbasal portion of chelicerae before the teeth row ( Fig. 287 View FIGURES 284–287 ). Sternum: 8.97 long, 7.35 wide.

Legs: Formula: I = IV II III. Length leg IV to leg I: 0.97. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. Metatarsi I–II fully scopulate; III 3/4 distal; IV 1/4 distal. IV divided by rows of setae. Spination: Palp and legs (ventral apical: tibia/metatarsi): Palp: 0; I: 0/0; II: 2/0; III: 2/0; IV: 1/0. Maxillary stridulatory organ: composed of 12 thick setae forming a straight crescent line, setae increase in size from the internal to external side of maxillae; longest ones flattened laterally, tips of setae with rugous texture, 12–14 slender setae after thickest ones ( Fig. 286 View FIGURES 284–287 ). Short and ordered coverage setae densely grouped on the retrolateral side of the maxillae/coxae, trochanter, proximal part of palp femur and prolateral side of the same articles of leg I.

Spermathecae ( Fig. 283 View FIGURES 276–283 ): Two elongate spermathecae completely separated, roughly straight, with 2–3 rounded, sclerotized lobes disposed on a central fold on middle area, decreasing in size from apex. Apical lobe of spermathecae rounded and well sclerotized.

Color pattern (preserved in alcohol): Carapace brown and abdomen with dark longitudinal line connected with at least 4 transverse lines forming orange paired macules dorsally, metatarsi with an orange line from the retrolateral side towards the segment, tarsi with an orange dorsal spot.

Distribution. Venezuela, Guyana and Brazil ( Fig. 145 View FIGURE 145 ).

R

Departamento de Geologia, Universidad de Chile

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Theraphosidae

Genus

Psalmopoeus

Loc

Psalmopoeus irminia Saager, 1994

Cifuentes, Yeimy & Bertani, Rogerio 2022
2022
Loc

Psalmopoeus irminia

Cifuentes, Y. & Perafan, C. 2020: 109
Bertani, R. & de Sena Santos, A. & Abegg, A. D. & Roncolatto Ortiz, F. & de Freitas, M. A. 2016: 1
Mendoza M. & J. I 2014: 734
Schmidt, G. & Bullmer, M. & Thierer-Lutz, M. 2006: 8
Saager, F. 1994: 59
1994