Eupalaestrus roccoi, Malta Borges & Paladini & Bertani, 2021

Malta Borges, Leandro, Paladini, Andressa & Bertani, Rogério, 2021, Two new species of Eupalaestrus Pocock, 1901 (Araneae: Theraphosidae) from Southern Brazil and Northeastern Argentina, Journal of Natural History 55 (13 - 14), pp. 889-908: 898-905

publication ID

http://doi.org/ 10.1080/00222933.2021.1925767

publication LSID

lsid:zoobank.org:pub:F1D6F5E1-5B3D-47C0-AEC7-ADDBB97523C3

persistent identifier

http://treatment.plazi.org/id/A7208156-FF8E-930A-FEFA-B88FFD3CFC5B

treatment provided by

Plazi

scientific name

Eupalaestrus roccoi
status

sp. nov.

Eupalaestrus roccoi   sp. nov. ( Figures 4–6 View Figure 4 View Figure 5 View Figure 6 , 7 View Figure 7 (b), 8)

Type material. Holotype male ( MCTP43986 View Materials ), BRAZIL, state of Rio Grande do Sul, Santa Maria (29.722°S, 53.718°W), April 2018, L.M. Borges coll. GoogleMaps   Paratypes: female, same locality, 20 February 2018, L GoogleMaps   .M GoogleMaps   . Borges coll. ( MCTP43990 View Materials ); female, same locality, February 2019, L GoogleMaps   . M GoogleMaps   . Borges coll. ( MCTP43989 View Materials ); male, same locality, June 2018, L GoogleMaps   .M GoogleMaps   . Borges coll. ( MCTP43987 View Materials ); male, same locality, February 2019, L GoogleMaps   .M GoogleMaps   . Borges coll. ( MCTP43988 View Materials )   .

Additional material examined. BRAZIL, Rio Grande do Sul, Alvorada , male, 14 May 1994, J   .A   .C. Oliveira coll. ( MCN 25533 View Materials ), male, 21 April 1986, R   . Guzinski coll. ( MCN 15009 View Materials ); Butiá , female, 5 May 1997, C   . Ribeiro coll   . ( MCTP10074 View Materials ); Charqueadas , male, 5 May 1996, R   .M. Valer coll. ( MCTP7854 View Materials ); Dois Irmãos , two males, 20 April 1965, C   . Valle, coll   . ( MZUSP14877 View Materials ); Gravataí , female, 10 May 2001, D   .S   . Costa coll. ( MCN 33890 View Materials ), female, 1 April 1992, C   . R. Abegg coll. ( MCTP2698 View Materials ); Guaíba , female, 19 May 1974, G   . Carvalho coll   . ( MCN2177), male, 2 December 1990, J   . Salgueiro coll   . ( MCTP1619 View Materials ), male, 3 May 2003, G   . M   . Petersen coll. ( MCTP016736 View Materials ), female, 26 May 1986, A   . Juliano coll   . ( MCN 15146 View Materials ); Ijuí , male, 6 April 2015, L   . M   . Borges coll. ( MCTP44007 View Materials ); Porto Alegre , female, 5 June 1992, ( MCN 22199 View Materials ), female, 21 October 1990, ( MCN2045), female, 18 April 1993, Adriana coll   . ( MCN 23526 View Materials ), male, 23 May 1992, M   . Morosini coll   . ( MCTP1756 View Materials ), male, 24 May 1992, A   . Mazoneli coll   . ( MCTP1516 View Materials ), female, 30 August 1997, L   .L   . Mello coll. ( MCTP10076 View Materials ), female, 14 June 1998, M   .A.S. D’avila coll. ( MCN 29424 View Materials )   , female, 1 October 1997, M. Bertoletti coll   . ( MCN 28711 View Materials ), male, 15 June 2007, Barcelos coll   . ( MCN 43406 View Materials ), male, 10 May 1972, C   . Migot coll   . ( MCN3538), male, 27 October 1997, K   . Bianchi coll   . ( MCTP10046 View Materials ), male, 7 June 2003, G   .M   . Petersen coll. ( MCTP16720 View Materials ), male, 22 April 1993, C   .M   . Santos coll. ( MCTP3211 View Materials ), male, 18 May 2002 ( MCTP13471 View Materials ), male, 10 May 1993, C   .G   . Fernandez coll. ( MCTP3201 View Materials ), female, 12 April 2004, V   .A. Broglio coll. ( MCN 38491 View Materials ), male, March 1988, A   . Pereira coll   . ( MCN 17720 View Materials ), female, 10 February 1967, A   .A   . Lise coll. ( MCN 00470 View Materials ); Rolador , female, 28 December 2018, L   .M   . Borges coll. ( MCTP44006 View Materials ); São Leopoldo , male, 1964, C   . Valle coll   . ( MZUSP4288 View Materials ), male, 20 July 1965, C   . Valle coll   . ( MZUSP4752 View Materials ); São Pedro do Sul, male, 20 May 2016, L   . Nunes coll   . ( MCTP44008 View Materials ); male, July 2018, L   .M   . Borges coll. ( MCTP44009 View Materials ); Viamão , male, 17 April 1968, A   .A   . Lise coll. ( MCN 00678 View Materials ), male, 12 May 1974, D   . Hendriclaso coll   . ( MCN 02078 View Materials ), male, 7 April 1996, M   . Negrini coll   . ( MCTP7801 View Materials ), female, 20 May 1997, L   . Joo coll   . ( MCTP10077 View Materials ), male, 17 April 1968, A   .A   . Lise coll. ( MCN 00680 View Materials ), male, 10 May 1956, M   . Castro coll   . ( MCN1936), male, 2 May 1993, R   . Balestrin coll. ( MCTP3204 View Materials ), male, 26 May 1992, S   . Bringhenti coll   . ( MCTP2019 View Materials ), male, female, 7 April 1995, A   .A   . Lise coll. ( MCTP9149 View Materials ), male, 17 April 1968, A   .A   . Lise coll. ( MCN 00677 View Materials )   .

Etymology. The specific name is in honour of Rocco Alfredo di Mare, former advisor of the first author, who unfortunately died in 2017.

Diagnosis. Both sexes differ from E. campestratus   and E. larae   by the absence of long setae in the ventral region dispersed along the sternum and coxae ( Figures 4 View Figure 4 (b), 5(b)). Females can be distinguished from E. spinosissimus   by the absence of stiff setae on metatarsi IV ( Figure 5 View Figure 5 (e)). This new species differs from E. weijenberghi   (see Ferretti et al. 2010, fig. 11) in colour, with conspicuous yellow lines on the patella, tibia and metatarsus ( Figure 6 View Figure 6 ). It can be distinguished from E. crassimetatarsis   sp. nov. by the non-incrassate metatarsi IV in males ( Figure 4 View Figure 4 (f)) and slightly incrassate metatarsi IV in large females ( Figure 5 View Figure 5 (e)), their generally smaller size, and also by their generally greyish colour, whereas adults of E. crassimetatarsis   sp. nov. are predominantly black ( Figure 6 View Figure 6 ). Additionally, females can be distinguished from all other species, except E. crassimetatarsis   sp. nov., by having a large group of spiniform setae between the retrolateral faces of coxae IV ( Figure 5 View Figure 5 (c)). Males also have these setae but generally in a smaller quantity.

Description. Male holotype (MCTP43986). Carapace 13.71 long, 11.93 wide, chelicerae 6.01. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 12.42, 5.95, 9.51, 8.39, 5.26, 41.53. II: 10.89, 5.55, 8.22, 7.99, 5.64, 38.29. III: 9.81, 4.75, 7.04, 8.83, 5.10, 35.53. IV: 12.88, 5.88, 10.92, 13.96, 5.15, 48.79. Palp: 7.62, 3.86, 5.89, -, 2.86, 20.23. Midwidths: femora I–IV = 2.22, 2.29, 3.05, 2.26, palp = 1.81; patellae I–IV = 2.47, 2.39, 2.38, 2.50, palp = 2.19; tibiae I–IV = 2.11, 1.72, 2.02, 2.52, palp = 2.64; metatarsi I–IV = 1.43, 1.28, 1.48, 1.36; tarsi I–IV = 0.91, 0.86, 0.79, 0.79, palp = 1.97. Abdomen 16.67 long, 11.22 wide. Spinnerets: PMS, 1.49 long, 0.67 wide, 0.45 apart; PLS, 2.68 basal, 1.66 middle, 1.73 distal; midwidths 0.98, 0.91, 0.70, respectively.

Carapace: length to width ratio 1.15; cephalic area moderately raised; thoracic striae deep. Fovea: deep, straight, 2.91 wide. Carapace covered with short and slender setae, bordered with longer ones projecting outwards.

Eyes and eye tubercle: tubercle 0.74 high, 1.84 long, 2.59 wide. Clypeus 0.15 wide. Anterior row procurved, posterior slightly recurved. Sizes and inter-distances: AME 0.35, ALE 0.42, PME 0.20, PLE 0.45, AME–AME 0.36, AME–ALE 0.18, AME–PME 0.14, ALE–ALE 1.28, ALE–PME 0.31, PME–PME 077, PME–PLE 0.06, PLE–PLE 1.23, ALE–PLE 0.19, AME–PLE 0.33. Eye group 1.66 wide, 0.98 long.

Maxillae: length 4.19, width 2.62. Cuspules: ca. 168 spread over the ventral inner heel. Lyra absent. Labium: 1.70 long, 2.74 wide, with ca. 117 cuspules spaced by ca. one diameter from each other on the anterior central third. Labio-sternal groove shallow, flat with two large sigilla.

Chelicerae: basal segment with 11 teeth on promargin and denticles on the basal area.

Sternum: length 6.32, width 5.89. Posterior angle rounded, not separating coxae IV. Sigilla: first pair rounded; second and third oval; the first one diameter away from margin, second and third one width.

Legs. Clavate trichobothria: on distal 2/3 of tarsi I–IV. Stridulatory apparatus: probably plumose setae ( Galleti-Lima and Guadanucci 2019) on femur I and IV (not examined under SEM). Scopula: Retrolateral femur IV scopulate. Tarsi I–IV fully scopulate. Metatarsi I fully scopulate; II 80%, III 35%, IV only few and sparse at the apical end. Spination: palp: femur p0–0–1; patella p1; tibia v0–1–0, p3–4–3, d1–0–0; leg I: femur p0–0–1; tibia v2–0–2(1ap), p0–2–0; metatarsus v2–0–2ap, p0–1–0; leg II: femur p0–0–1, r0–0–1; patella 0; tibia v2–3– 3ap, p0–2–0; metatarsus v2–2–2ap, p0–1–0; leg III: femur 0; patella 0; tibia v1–2–6(3ap), p1–1–0, r0–1–0; metatarsus v4–5–8(3ap), p1–1–1, r0–1–1; leg IV: femur p0–0–1; tibia v2– 4–5(4ap), p0-1-1, r0–1–1; metatarsus v27(4ap), p0–1–1, r0–1–0. Spiniform setae on prolateral coxae IV and retrolateral coxae III. Spiniform setae between the retrolateral faces of coxae IV. Claws: ITC absent from all legs; STC with a single row of very small teeth.

Urticating setae: types I and III, distributed as in Bertani and Guadanucci (2013, fig. 7).

Palp ( Figure 4 View Figure 4 (c,d)): palpal bulb pyriform, long embolus, slightly flattened laterally at distal region, apex short and slender. Prolateral keels present. PS forming the embolus edge distally. A present, developed. R present, developed. SA represented by a DR.

Tibial apophysis ( Figure 4 View Figure 4 (e)): two straight branches, originating at the same base, with the retrolateral branch becoming thinner in the middle region. Metatarsus I straight, when flexed touches the retrolateral branch laterally.

Colour ( Figure 6 View Figure 6 (b)): carapace and chelicera greyish, with darker cephalic area. Carapace bordered with scattered light brown setae, chelicerae with some long light brown setae. Legs black, with two yellow lines, visible on the patella and tibia, with a single line on the metatarsus. Coxae and sternum black, covered by short bristles. Labium and maxillae reddish brown. Abdomen covered with black setae and scattered brown guard setae.

Description. Female paratype (MCTP43990). Carapace 14.68 long, 12.97 wide, chelicerae 7.69. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 10.06, 6.16, 6.96, 6.03, 4.59, 33.80. II: 8.84, 5.64, 6.00, 5.56, 4.30, 30.34. III: 8.02, 5.18, 5.58, 6.16, 4.18, 29.12. IV: 11.67, 6.54, 9.31, 10.94, 4.91, 43.37. Palp: 7.44, 4.88, 5.37, -, 5.57, 23.26. Midwidths: femora I–IV = 1.84, 1.98, 2.30, 2.11, palp = 1.43; patellae I–IV = 2.35, 2.20, 2.34, 2.76, palp = 2.14; tibiae I–IV = 1.99, 1.89, 2.20, 3.29, palp = 1.98; metatarsi I–IV = 1.67, 1.49, 1.58, 1.81; tarsi I–IV = 1.29, 1.31, 1.19, 1.25, palp = 1.49. Abdomen 17.17 long, 13.73 wide. Spinnerets: PMS, 1.74 long, 0.91 wide, 0.86 apart; PLS, 2.57 basal, 2.32 middle, 2.28 distal; midwidths 0.95, 0.93, 0.82, respectively.

Carapace: length to width ratio 1.13; cephalic area moderately raised; thoracic striae deep. Fovea: deep, straight, 2.35 wide. Carapace covered with short and slender setae, bordered with longer ones projecting outwards.

Eyes and eye tubercle: tubercle 0.48 high, 1.69 long, 2.48 wide. Clypeus 0.19 wide. Anterior row procurved, posterior slightly recurved. Sizes and inter-distances: AME 0.36, ALE 0.44, PME 0.31, PLE 0.40, AME–AME 0.34, AME–ALE 0.25, AME–PME 0.19, ALE–ALE 1.32, ALE–PME 0.50, PME–PME 0.80, PME–PLE 0.09, PLE–PLE 1.35, ALE–PLE 0.33, AME–PLE 0.45. Eye group 1.80 wide, 1.07 long. Maxillae. Length 5.50, width 3.11. Cuspules: ca. 240 spread over the ventral inner heel. Lyra absent. Labium 2.19 long, 3.09 wide, with 118 cuspules spaced by ca. one diameter from each other on the anterior central third. Labiosternal groove shallow, flat, with two large sigilla.

Chelicerae: basal segment with 14 teeth on promargin and denticles on the basal area.

Sternum: length 6.65, width 5.71. Posterior angle rounded, not separating coxae IV. Sigilla: first pair rounded; second and third oval; the first one diameter away from margin, the second and third one width.

Legs. Clavate trichobothria: on distal 2/3 of tarsi I–IV. Stridulatory apparatus: probably plumose setae ( Galleti-Lima and Guadanucci 2019) on femur I and IV (not examined under SEM). Scopula: retrolateral femur IV scopulate. Tarsi I–IV fully scopulate. Metatarsi I fully scopulate; II 60%; III 30%, IV lacking scopula. Spination: palp: tibia v0–0–2ap; leg I: metatarsus v0–0–3ap; leg II: metatarsus v2–0–3ap; leg III: tibia v0–1–3ap, p1–1–0, r0–1– 0; metatarsus v2–0–3ap, p1–1–1, r0–1–1; leg IV: tibia v0–1–3ap, p0–1–1, r0–1–1; metatarsus v21(4ap), p0–1–1, r0–1–1. Spiniform setae on prolateral coxae II–IV and retrolateral coxae II–IV. A large group of spiniform setae also between the retrolateral faces of coxae IV. Claws: ITC absent from all legs; STC with a single row of very small teeth.

Urticating setae: types I and III, distributed as in Bertani and Guadanucci (2013, fig. 7).

Genitalia ( Figure 5 View Figure 5 (d)): two short spermathecae separated by a non-sclerotised area, spermathecal stalk narrower than elongated spermathecal bulb.

Colour ( Figure 6 View Figure 6 (a)): as in male, except for the more conspicuous yellow lines on the legs.

Distribution ( Figure 8 View Figure 8 ). Transitional areas of Atlantic Forest and Pampa in the state of Rio Grande do Sul, Southern Brazil ( Figure 7 View Figure 7 (b)).

Other paratypes – general measurements. Male ( MCTP43987 View Materials )   . Carapace 11.74 long, 11.48 wide. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 10.87, 5.47, 8.09, 7.01, 4.52,

35.96. II: 9.61, 5.05, 6.68, 7.02, 5.26, 33.62. III: 8.94, 4.52, 6.03, 7.92, 4.99, 32.40. IV: 11.09, 5.15, 9.31, 12.44, 6.31, 44.30. Palp: 6.72, 3.91, 5.83, -, 2.56, 19.02. Midwidths: femora I–IV = 1.81, 1.85, 2.60, 2.08, palp = 1.54; patellae I–IV = 2.16, 2.03, 1.97, 2.29, palp = 1.82; tibiae I–IV = 1.66, 1.51, 1.97, 2.15, palp = 2.33; metatarsi I–IV = 1.25, 1.15, 1.21, 1.28; tarsi I–IV = 0.99, 0.86. 0.91, 0.88, palp = 1.80. Abdomen 12.44 long, 7.01 wide. Sternum 5.01 long, 4.05 wide. Male (MCTP43988). Carapace 11.96 long, 11.84 wide. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 11.43, 5.50, 8.46, 7.66, 5.36, 38.41. II: 10.40, 5.11, 7.19, 7.16, 5.33, 35.19. III: 8.92, 4.78, 6.38, 8.35, 5.12, 33.55. IV: 12.01, 5.60, 10.43, 13.15, 6.47, 47.66. Palp: 6.96, 4.19, 6.28, -, 2.16, 19.59.Midwidths:femora I–IV = 2.14, 2.26,2.85, 2.21,palp = 1.77; patellae I–IV = 2.27,2.35, 2.44, 2.49, palp = 2.07; tibiae I–IV = 1.91, 1.61, 1.90, 2.34, palp = 2.43; metatarsi I–IV = 1.32, 1.30, 1.23, 1.39; tarsi I–IV = 1.10, 1.11, 1.01, 1.12, palp = 1.84. Abdomen 13.95 long, 8.77 wide. Sternum 5.28 long, 4.56 wide. Female (MCTP43989). Carapace 13.49 long, 12.01 wide. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 9.88, 6.21, 7.76, 6.24, 4.61, 34.70. II: 8.54, 5.37, 6.03, 5.22,4.60, 29.76.III: 7.96,5.18,5.55,6.23, 3.97,28.89.IV: 11.34,6.39,9.30, 10.44,5.06,42.53. Palp: 7.68, 4.92, 5.29, -, 5.36, 23.25. Midwidths: femora I–IV = 1.83, 2.16, 2.28, 2.30, palp = 1.77; patellae I–IV = 2.41, 2.30, 2.31, 2.86, palp = 2.05; tibiae I–IV = 1.92, 1.72, 1.98, 3.27, palp = 1.79; metatarsi I–IV = 1.65, 1.41, 1.58, 1.88; tarsi I–IV = 1.52, 1.46, 1.37, 1.41, palp = 1.80. Abdomen 18.67 long, 11.41 wide. Sternum 6.23 long, 5.35 wide.

Remarks. There are slight colour variations between some specimens from the same locality as the types, which have barely noticeable lines on the legs ( Figure 6 View Figure 6 (c–d)). Additionally, a few specimens collected east of the Taquari River have a very thickened metatarsus IV, although only in females, which is very similar to that found in E. crassimetatarsis   sp. nov. Males collected in this area resemble E. roccoi   sp. nov. These specimens may be part of a distinct undescribed species.

MCN

McNeese State University

R

Departamento de Geologia, Universidad de Chile

V

Royal British Columbia Museum - Herbarium