Eusarcus grumani H. Soares

Hara, Marcos Ryotaro & Pinto-Da-Rocha, Ricardo, 2010, Systematic review and cladistic analysis of the genus Eusarcus Perty 1833 (Arachnida, Opiliones, Gonyleptidae) 2698, Zootaxa 2698, pp. 1-136 : 65-68

Eusarcus grumani H. Soares

( Figs. 18, 47A,B, 49B)

Eusarcus grumani H. Soares 1966c: 119 , figs. 1, 1a; Kury 2003a: 169 (cat). (ma holotype, “Morro da Polícia, Porto Alegre, Rio Grande do Sul; 15.viii.1951; HEMS 1008”; 1 fe “ allotype ”, “Morro Teresópolis, Porto Alegre, Rio Grande do Sul; 8.iii.1949; HEMS 999”, examined, all in bad state of preservation).

Material examined: BRAZIL. Rio Grande do Sul: Porto Alegre ( Morro da Polícia ), without name of collector, 15.viii.1951, ma holotype ( HEMS 1008 ) ; idem ( Morro Teresópolis ), without name of collector, 8.iii.1949, 1 fe “ allotype ” ( HEMS 999 ) ; Arroio do Tigre ( Itaúba ), H. Bischoff leg., 8.iv.1978, 1 ma ( MCNZ 486 ) ; Canela , A.A. Lise leg., 5.iii.1977, 1 ma ( MCNZ 283 ) ; Porto Alegre , A.A. Lise leg., 02.iv.1977, 1 ma ( MCNZ 289 ) .

Diagnosis: E. grumani resembles E. caparaoensis + and E. manero +, which have a short, blunt conical prolateral basal apophysis on the male trochanter IV, and can be distinguished by: The presence of PAM; ocularium high, with 2 pointed tubercles; median spine of scutal area III short; lateral margin of dorsal scutum with external row of high, pointed tubercles; unique tibia IV: Slightly sinuous, its distal 2/3 thickened and carrying pointed tubercles, a retrolateral row of enlarged, pointed tubercles in middle third, ventrally with prolateral row of pointed tubercles increasing in size distally, 2 apical spines.

Note: The type material is in a bad state of preservation, but there are two vials containing identified specimens of this species in other collections. Those specimens were compared with the remaining parts of the type material and they also correspond perfectly with the description provided by H. Soares (1966c).

Redescription: Male (MCNZ 289): Dorsum ( Fig. 18A,B): Measurements: SL 3.95; SMW 3.40; femur I 1.75; II 2.95; III 2.35; IV 2.65. Median paracheliceral projection of similar-size as PAM. Anterior margin with an irregular row of 13 tubercles, 1–2 enlarged tubercles on each corner. Ocularium next to anterior scutal margin; high, with 2 pointed tubercles, 9 small tubercles. Carapace with 42 scattered tubercles. Scutal area I with 15–17 scattered tubercles on each side; II with an anterior row of 9 tubercles, 8 scattered, 1 row of 14 next to groove III; III with 37 tubercles and a median spine short, not surpassing groove IV; IV with 37 tubercles. Lateral margin of dorsal scutum with an external regular row of enlarged tubercles increasing in size posteriorly and ending in 1–2 pointed tubercles. Posterior margin of dorsal scutum with 3 scattered tubercles and a row of 13 tubercles. Free tergites I–III with a row of 15, 14, 16 tubercles, respectively. Anal operculum with 38 tubercles.

Venter: Coxa I with 24 tubercles, median and distal ones largest; II with 34–37, distal ones largest; III with 29–31 tubercles, retrolateral apical ones largest; IV irregularly tuberculate.

Chelicera: Segment I with 2–3 tubercles.

Pedipalpus: Trochanter dorsally inflated, with 3 tubercles; ventrally with 1 large pointed prolateral tubercle, 1–2 small retrolateral ones. Femur dorsally with 4 aligned tubercles; ventrally with 1 large basal tubercle, 3–4 small aligned ones. Tibial setation: Prolateral IiIi, retrolateral IiiIi. Tarsal setation: Prolateral IIi, retrolateral IiIi.

Legs ( Fig. 18C–H): Coxa II with 2–4 tubercles on retrolateral margin and 1 large apical one; IV densely tuberculate, with 1 transversal prolateral apical apophysis, this conical, long, blunt, curved posteriad and ventrad, swollen in the middle and subapically. Trochanters I–IV with scattered tubercles; I–II with 1 large ventro-basal tubercle; IV prolaterally with 1 basal apophysis, this conical, short, blunt, swollen in the middle; retrolaterally with 1 large pointed apical tubercle. Femora I–II with small PDS, RDS; I ventrally with 2 rows of slightly enlarged tubercles; III sinuous, with reduced PDS, small RDS; ventrally with a prolateral row of pointed tubercles increasing in size distally (5 large), a retrolateral row of slightly pointed tubercles, 1 prolateral apical spine; IV sinuous, with medium PDS, RDS; prolateral and retrolateral row of enlarged tubercles; ventrally with 2 rows of tubercles, prolateral ones pointed and increasing in size distally (4 large), 2 apical spines, retrolateral one blunt, smaller. Tibia I ventrally with 2 rows of slightly enlarged tubercles; III ventrally with 2 rows of pointed tubercles increasing in size subapically (3–4 large); IV slightly sinuous, its distal 2/3 thickened and carrying pointed tubercles, a retrolateral row of enlarged, pointed tubercles in middle third, ventrally with a prolateral row of pointed tubercles increasing in size distally (7 large), 2 apical spines, prolateral one smaller. Metatarsi I–II with 2 ventro-apical setae. Tarsal segmentation: 5, 6, 6, 6.

Penis ( Fig. 47A,B): Stylus with medio-ventral trichomes, apex slightly swollen subapically; with angular medio-ventral projection. Ventral process of glans curved; apex blunt, thin. Ventral plate with concave sides; with 3 pairs of apically curved distal setae; 1 pair of short, straight median setae; 4 pairs of straight basal setae.

Coloration: Slightly orange-brown, more conspicuous on body edges, legs and apophyses. Light brown on distal portions of femora, basal and distal portions of tibiae, metatarsi and tarsi.

Female (allotype; HEMS 999): Dorsum: Measurements: SL 3.50; SMW 2.80; femur I 1.50; II 2.45; III 1.90; IV 2.30. Median paracheliceral projection smaller than PAM. Posterior margin of dorsal scutum and free tergites I–III with an irregular row and a regular row of 12 and 21, 14 and 20, 6 and 22, 9 and 19 tubercles, respectively. Legs: Coxa IV densely and irregularly tuberculate, with 1 oblique prolateral apical apophysis, this conical, short, blunt, curved posteriad and dorsad. Trochanter IV with scattered tubercles, retrolaterally with 1 large median tubercle, 1 small blunt apical apophysis. Femur II with 2 rows of slightly enlarged tubercles; III ventrally with two irregular rows of tubercles increasing in size distally, prolateral ones enlarged, 1 large blunt prolateral apical tubercle; IV with prolateral and retrolateral rows of similar-sized tubercles; ventrally with an irregular prolateral row of tubercles increasing in size distally, 1 blunt prolateral apical spine. Tibiae III–IV with rows of similar-sized tubercles. Tarsal segmentation: 5–6, 6, 6,?.

Variation in males (n=3): Measurements: SL 3.10–3.95; SMW 2.70–3.40; femur I 1.40–1.75; II 2.30– 2.95; III 1.80–2.35; IV 2.20–2.65. Pedipalpus: Tibial setation: Retrolateral IiiIi/IiIi. Tarsal setation: Retrolateral IiIi/IIi. Femora I–II with reduced or small PDS, RDS.

Type locality: Brazil, Rio Grande do Sul, Porto Alegre, Morro da Polícia .

Geographical distribution ( Fig. 49B): Brazil. Rio Grande do Sul.