Eusarcus manero, Hara & Pinto-Da-Rocha, 2010

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 : 79-81

Eusarcus manero sp. n.

( Figs. 23, 45E,F, 49A)

Type material: BRAZIL. Rio de Janeiro: Maricá (Itaipuaçu), A. Giupponi leg., 15.i.2000, ma holotype & 2 ma & 1 fe paratypes ( MNRJ 11367 ) ; Maricá, C. Ostrowsky leg., 8.viii.1977, 2 ma paratypes ( MNRJ 6050 ) ; idem (Ponta Negra), P. Junberg, L.C.F. Alvarenga, H.M. Barros, C.N. Ricci, L.A.L. Gomes leg., 19.x.1975, 7 ma & 9 fe paratypes & 1 im ( MNRJ 11357 ) ; idem, 3 ma & 3 fe paratypes ( MZSP 28661 ) .

Diagnosis: E. manero resembles E. caparaoensis + and E. manero +, which have a conical, short, blunt prolateral basal apophysis on male trochanter IV, and can be distinguished by: The presence of PAM; ocularium with 2 large tubercles; median spine of scutal area III of medium size, reaching groove V; trochanter IV only with prolateral basal apophysis; femur IV with only 1 proventral apical spine (PVS).

Etymology: The name, a noun in apposition, refers to a common slang word (meaning “cool”) used by people living in the state where the species was collected.

Description: Male (holotype): Dorsum ( Fig. 23A,B): Measurements: SL 4.10; SMW 3.80; femur I 2.00; II 4.15; III 3.10; IV 3.90. Median paracheliceral projection of similar-size as PAM. Ocularium far from anterior scutal margin; with 2 moderately enlarged tubercles, 10 small ones. Carapace with 31 scattered tubercles. Scutal area I with 17–19 tubercles on each side next to grooves I, median and II; II with 33; III with 26 and a median spine of medium size, reaching groove V; IV with 15 tubercles. Posterior margin of dorsal scutum and free tergites I–III with a row of 18, 14, 14, 8 tubercles, respectively. Anal operculum with 16 tubercles.

Venter: Coxa I with 17–18 tubercles, median and distal ones largest; II with 28–32, distal ones largest; III– IV irregularly tuberculate.

Chelicera: Segment I with 4 tubercles.

Pedipalpus: Trochanter dorsally inflated, with 2 tubercles. Femur dorsally with 2 tubercles; ventrally with 1 large basal tubercle, 2 small scattered ones. Tibial setation: Prolateral IiI, retrolateral IiIi. Tarsal setation: Prolateral IIi, retrolateral IiIi.

Legs ( Fig. 23C–H): Coxa II with 1 tubercle on retrolateral margin; IV densely tuberculate, with 1 oblique prolateral apical apophysis, this conical, long, blunt, curved posteriad and ventrad, swollen subasally and subapically. Trochanters I–IV with scattered tubercles; I with 1 large ventro-basal tubercle; IV prolaterally with 1 basal apophysis, this conical, short, blunt, swollen in the middle; retrolaterally with 1 large median tubercle. Femur I with reduced PDS, small RDS, ventrally with 2 rows of slightly enlarged tubercles; II–IV with small PDS, medium RDS; III sinuous, ventrally with 2 rows of tubercles, prolateral slightly increasing in size distally, with 1 short prolateral apical spine; IV sinuous, ventrally with 2 rows of tubercles, prolateral ones increasing in size distally, becoming high, pointed, 1 prolateral apical spine, 1 large retrolateral apical tubercle. Tibia III ventrally with 2 rows of tubercles increasing in size subapically, becoming high, pointed. Tarsal segmentation: 5, 8, 6, 6.

Penis ( Fig. 45E,F): Stylus with medio-ventral trichomes, apex slightly swollen; with angular medioventral projection. Ventral process of glans curved; apex blunt. Ventral plate with concave sides; with 3 pairs of apically curved distal setae; 2 ventral pairs of small distal tubercles; 1 pair of short, straight median setae; 4 pairs of straight basal setae.

Coloration: Brown; dark brown on prolateral apical apophysis of coxa IV, trochanter IV and femur IV. Light brown on tarsi.

Female (paratype; MNRJ 11357): Measurements: SL 4.10; SMW 3.80; femur I 2.00; II 4.15; III 3.10; IV 3.90. Pedipalpus: Tibial setation: Prolateral and retrolateral IiIi. Legs: Coxa IV densely tuberculate, with 1 oblique prolateral apical apophysis, this conical, short, pointed. Trochanters I–IV with scattered tubercles; I–II with 1 large ventro-basal tubercle; IV retrolaterally with 1 short apical apophysis. Femur I with small PDS, RDS, ventrally with 2 rows of slightly enlarged tubercles; III with reduced PDS, medium RDS; ventrally with 2 rows of tubercles, prolateral slightly increasing in size distally, with 2 large apical tubercles, prolateral one largest; IV ventrally with 2 rows of tubercles, prolateral one increasing in size distally, 1 prolateral apical spine, 1 large retrolateral apical tubercle. Tibia III with rows of similar-sized tubercles. Metatarsus I with 2 ventro-apical setae. Tarsal segmentation: 5, 7, 6, 6. Coloration: Same as in male, but dark brown on anterior margin of prosoma and free tergites.

Variation of males (n=6): Measurements: SL 3.90–4.30; SMW 3.50–4.10; femur I 2.00–2.10; II 4.10– 4.50; III 3.10–3.40; IV 3.90–4.30. Pedipalpus: Tibial setation: Prolateral IiIi/IIi/IiI. Femora I–III with reduced or small PDS; IV with small or medium PDS. Tarsal segmentation: 5, 7–9, 6, 6.

Variation in females (n=6): Measurements: SL 3.50–4.10; SMW 3.20–3.80; femur I 1.70–2.00; II 3.50– 4.15; III 2.70–3.10; IV 3.60–3.90. Femur I with small or medium RDS; III with reduced or small PDS, medium or large RDS. Tarsal segmentation: 5, 7–8, 6, 6.

Type locality: Brazil, Rio de Janeiro, Maricá, Itaipuaçu .

Geographical distribution ( Fig. 49A): Known only from the type locality.