Eusarcus oxyacanthus Kollar

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 : 91-94

publication ID

1175­5334

persistent identifier

https://treatment.plazi.org/id/039387E5-9501-4635-FF65-FCB58EB3FCA3

treatment provided by

Felipe

scientific name

Eusarcus oxyacanthus Kollar
status

 

Eusarcus oxyacanthus Kollar View in CoL

( Figs. 28, 39A,B, 51)

Eusarcus oxyacanthus Kollar View in CoL in Koch 1839a: 9; 1839b: 7 (rdesc), pl.218, figs. 543–544; Bertkau 1880: 6 (cit), 106 (com descr); Roewer 1913: 68 (key), 70 (rdesc, dist: dubious provenance); 1923: 418 (key), 419 (rdesc), fig. 522; Mello- Leitão 1923b: 122 (cat); 1926: 372 (diag); Strand 1926: 43 (cit); Roewer 1929: 197 (key), 198 (dist: dubious distribution record); Mello-Leitão 1932: 155 (key), 156 (rdesc), fig. 78; 1940: 7 (key); 1945: 155 (cat), 157 (key), fig. 18; B. Soares 1945c: 376 (cat [pars]); Soares & Soares 1954b: 261 (cat); Moritz 1971: 206 (cat); Acosta 1996b: 224 (cat); Kury 2003a: 169 (cat). (ma lectotype, ma & fe paralectotypes, here designated; “ Brasilien, Olfers leg., ZMB 891”, pinned, examined; 1 ma paralectotype; “ Brasilien, SMF RI 1272”, examined).

Enantiocentron doriphorus Mello-Leitão 1932: 450 View in CoL , fig. 10; Mello-Leitão 1936: 24 (key). (ma holotype; “Jacarepaguá, [Rio de Janeiro, Rio de Janeiro], Berla leg., MNRJ 1391”, examined). Syn. n.

Eusarcus doriphorus: Mello-Leitão 1945: 154 (cat), 158 (key), fig. 12; B. Soares 1945c: 375 (cat); Soares & Soares 1954a: 497 (dist, syst); 1954b: 259 (cat); Kury 2003a: 169 (cat).

Eusarcus spinimanu Mello-Leitão 1932: 156 View in CoL (key), 159, fig. 83; 1940: 6 (key); 1945: 155 (cat), 158 (key), fig. 20; B. Soares 1945c: 376 (cat); Soares & Soares 1954a: 497 (syst); 1954b: 262 (cat); Kury 2003a: 170 (cat). (ma lectotype; “Niterói, Rio de Janeiro; MNRJ 1428”; examined; idem, 1 ma paralectotype; “MNRJ 1428b”; examined). Syn. n.

Eusarcus hastatus View in CoL : [wr il] Mello-Leitão 1945: fig. 14.

Material examined: BRAZIL. Without locality, Olfers leg., without date, ma lectotype, 1 ma & 1 fe paralectotypes of E. oxyacanthus ( ZMB 891), here designated; idem, without name of collector and date, 1 ma paralectotype of E. oxyacanthus (SMF RI, 1272) . Rio de Janeiro: Niterói, without name of collector and date, ma lectotype of Eusarcus spinimanu (MNRJ 1428) ; idem, 1 ma paralectotype of E. spinimanu (MNRJ 1428b) ; Rio de Janeiro (Jacarepaguá), Berla leg., without date, ma holotype of E. doriphorus (MNRJ 1391) . Rio de Janeiro: E. de Morais Mello leg., without date, 1 fe ( MNRJ 1433); Casimiro de Abreu (Barra de São João), Exp. Arachné leg., 21–24.iii.2003, 1 fe ( MNRJ); Maricá (Itaipuaçu), A. Giupponi & Pedroso leg., 12.x.1999, 1 ma & 4 fe ( MNRJ 4835); Nova Friburgo, M. Rosa leg., 1 fe ( MNRJ 42349); Nova Iguaçu (Tinguá), without date and collector, 2 fe ( MNRJ 6797); idem, E. Izecksohn & J. Jim leg., 21.viii.1965, 1 ma ( MNRJ 16138); idem, E. Izecksohn & Peracchi leg., 9.ix.1966, 1 ma ( MNRJ 17366); idem, A.B. Kury leg., 22.xi.1990, 1 ma ( MNRJ 6798); Pinheiral, without name of collector and date, 1 ma ( MZSP 1578); Queimados (Km 37 rodovia Presidente Dutra), Peracchi leg., 9.ix.1959, 1 ma & 1 fe ( MNRJ 1654); idem (Km 37 rodovia Presidente Dutra, rio Guandu), O. Fraga leg., 25.x.1960, 3 ma ( HEMS 231); idem, 2 fe ( HEMS 232); Rio de Janeiro, J. Moojen leg., without date, 1 fe ( MNRJ 1540); idem, R.G. Klossal leg., i.1957, 1 fe ( MNRJ 16145); idem (Corcovado), P. Wygodzinsky leg., 1.vi.1947, 1 ma ( MZSP 1045); idem (Floresta da Tijuca), Mondin leg., without date, 1 ma ( MNRJ 6080); idem, E. Izecksohn leg., 19.v.1978, 1 ma ( MNRJ 16146); idem, A. Giupponi & E. Folly leg., 6.i.2000, 1 beta male ( MNRJ 4340); idem (Parque Estadual da Pedra Branca, Floresta do Engenho de Dentro), A.B. Kury, A. Giupponi, A. Bustamante, P. Ramalho & R. Carvalho Jr. leg., 6.v.1999, 2 ma & 1 fe ( MNRJ 5756); idem (Pedra da Gávea), J. Becker leg., 25.xi.1955, 1 ma ( HEMS 423); idem (Jacarepaguá), Arlé leg., without date, 1 ma ( MNRJ 11352; old number: MNRJ 58236); idem, 2 ma & 3 fe ( MNRJ 58326); idem, C. Couceiro leg., 12.ix.1962, 1 ma & 2 fe ( MNRJ 5392); idem, A.B. Kury leg., 12.vii.1989, 1 ma & 1 fe ( MNRJ 6489); idem (São Conrado), R. Sachsse & S. Potsch leg., 16.vii.1987, 2 ma ( MNRJ 6144); idem (Seropédica, Universidade Federal Rural do RJ, Km 47), E. Izecksohn leg., 14.iii.1962, 1 ma & 2 fe ( MNRJ 17369); idem (Trapicheiro), Izecksohn leg., xii.1954; 1 ma & 1 fe ( HEMS 1010); Silvestre, 28.viii.1977, C.S. Becker leg., 2 fe ( MCNZ 441); Teresópolis (Fazenda Alpina), Wygodzinsky leg., 11.i.1945, 1 ma ( MZSP 1175). São Paulo: Ubatuba (Picinguaba), H. El Zaher leg., without date, 1 fe ( MNRJ 11355).

Diagnosis: E. oxyacanthus resembles E. catharinensis because of the presence of prolateral median and apical apophyses on the male trochanter IV, and can be distinguished by: The presence of PAM; ocularium unarmed or with a pair of large tubercles; shape of prolateral apophyses on male trochanter IV: The conical median apophysis with a large base, short, blunt and the conical apical apophysis being long, sinuous, curved posteriad and dorsad (length similar to or longer than the width of its podomere).

Redescription: Male (MZSP 1175): Dorsum ( Fig. 28A,B): Measurements: SL 4.60; SMW 4.40; femur I 2.50; II 4.80; III 3.80; IV 4.90. Median paracheliceral projection smaller than PAM. Ocularium far from anterior scutal margin; low, with 2 large tubercles and 3 small ones. Carapace with 21 scattered tubercles. Scutal area I with 10 tubercles on each side next to median and groove II; II with 20; III with 13 and a median spine of medium size, oblique, surpassing groove V but not posterior margin of dorsal scutum; IV with 12 tubercles. Posterior margin of dorsal scutum and free tergites I–III with a row of 15, 18, 19, 11 tubercles, respectively. Anal operculum with 27 tubercles.

Venter: Coxa I with 22 tubercles, median and distal ones largest; II with 39, distal ones largest; III–IV irregularly tuberculate.

Chelicera: Segment I with 5 tubercles.

Pedipalpus: Trochanter dorsally inflated, with 4 tubercles; ventrally with 1 large prolateral tubercle, 2 small retrolateral ones. Femur dorsally with 4–6 large aligned tubercles, 3 small scattered ones; ventrally with 1 large basal tubercle, 3–4 small aligned ones. Tibial setation: Prolateral IiIi, retrolateral IiiIi/iIiIi. Tarsal setation: Prolateral IIi, retrolateral IiIi.

Legs ( Fig. 28C–J): Coxa II with 3–5 tubercles on retrolateral margin; IV densely tuberculate, with 1 oblique prolateral apical apophysis, this conical, long, curved posteriad and slightly ventrad. Trochanters I–IV with scattered tubercles; IV prolaterally with 1 median apophysis, this conical, with a large base, short, blunt; 1 oblique apical apophysis, this conical, long, sinuous, curved posteriad and dorsad; retrolaterally with 1 large pointed median tubercle. Femur I with small PDS, RDS; ventrally with 2 rows of tubercles increasing in size distally, becoming pointed, retrolateral ones enlarged; II–III with small PDS, medium RDS; ventrally with 2 rows of tubercles, retrolateral ones slightly enlarged; III sinuous, ventrally with 2 rows of tubercles increasing in size distally, retrolateral ones enlarged, with 2 large pointed apical tubercles; IV sinuous, medium PDS, RDS; ventrally with 2 rows of tubercles increasing in size distally, 1 PVS, 1 large retrolateral apical tubercle. Tibia I ventrally with 2 rows of tubercles slightly increasing in size toward the middle; III ventrally with 2 rows of tubercles slightly increasing in size subapically, retrolateral ones enlarged. Tarsal segmentation: 6, 7– 8, 6, 6.

Penis (MNRJ 1428; Fig. 39A,B): Stylus smooth, apex swollen; with angular medio-ventral projection. Ventral process of glans curved; apex with flabelliform projection. Ventral plate with concave sides; with 3 pairs of long, curved distal setae; 1 pair of short, straight median setae; 4 pairs of slightly curved basal setae.

Coloration: Light brown.

Female (MNRJ 58326): Dorsum: Measurements: SL 4.10; SMW 3.50; femur I 2.10; II 4.05; III 3.00; IV 3.85. Scutal area III with median spine of medium size, reaching groove IV. Legs: Coxa II with 3–6 tubercles on retrolateral margin; IV densely tuberculate, with 1 oblique prolateral apical apophysis, this conical, short, curved backwards. Trochanters I–IV with scattered tubercles; I–II with 1 large ventro-basal tubercle; III with large retrolateral tubercles; IV retrolaterally with 1 median, 1 large apical tubercles. Femur I with reduced PDS, RDS; ventrally with 2 rows of enlarged tubercles; II ventrally with 2 rows of slightly enlarged tubercles; III ventrally with 2 rows of enlarged tubercles, 1 large prolateral apical tubercle; IV ventrally with 2 rows of enlarged tubercles slightly increasing in size distally, 2 blunt apical spines. Tibiae I, III with rows of similarsized tubercles. Metatarsus I with 2 ventro-apical setae. Tarsal segmentation: 6, 7, 6, 6. Coloration: Brown; dark brown on body edges. Light brown on distal parts of metatarsi I–IV and tarsi I–IV.

Variation in males (n=6): Measurements: SL 4.30–4.75; SMW 3.80–4.40; femur I 2.20–2.50; II 4.50– 5.30; III 3.30–4.00; IV 4.40–5.30. Ocularium unarmed or with 2 large tubercles. Pedipalpus: Tibial setation: Prolateral IiIi/IIi, retrolateral IiiIi/iIiIi/IiIi. Femur I with reduced or small RDS. Tarsal segmentation: 6, 7–9, 6, 6.

Variation in females (n=6): Measurements: SL 3.70–4.40; SMW 3.25–3.80; femur I 1.70–2.10; II 3.50– 4.20; III 2.70–3.20; IV 3.70–4.20. Femur I with reduced or small PDS, reduced to medium RDS; II with reduced to medium PDS, small or medium RDS; III with small or medium PDS. Tarsal segmentation: 6, 7–9, 6, 6.

Type localities: Brazil. Of E. oxyacanthus : without futher data. Of E. doriphorus : Rio de Janeiro, Rio de Janeiro: Jacarepaguá. Of E. spinimanu : Rio de Janeiro, Niterói, and not Minas Gerais as stated in the original description.

Geographical distribution ( Fig. 51): Brazil, Rio de Janeiro and north coast of São Paulo.

ZMB

Museum für Naturkunde Berlin (Zoological Collections)

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

HEMS

Haslemere Educational Museum

MCNZ

Porto Alegre, Museu de Ciencias Naturais da Fundacao Zoo-Botanica do Rio Grande do Sul

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Gonyleptidae

Genus

Eusarcus

Loc

Eusarcus oxyacanthus Kollar

Hara, Marcos Ryotaro & Pinto-Da-Rocha, Ricardo 2010
2010
Loc

Eusarcus doriphorus: Mello-Leitão 1945: 154

Kury, A. B. 2003: 169
Soares, B. A. M. & Soares, H. E. M. 1954: 497
Mello-Leitao, C. F. de 1945: 154
Soares, B. A. M. 1945: 375
1945
Loc

Enantiocentron doriphorus Mello-Leitão 1932: 450

Mello-Leitao, C. F. de 1936: 24
Mello-Leitao, C. F. de 1932: 450
1932
Loc

Eusarcus spinimanu Mello-Leitão 1932: 156

Kury, A. B. 2003: 170
Soares, B. A. M. & Soares, H. E. M. 1954: 497
Soares, B. A. M. 1945: 376
Mello-Leitao, C. F. de 1932: 156
1932
Loc

Eusarcus oxyacanthus

Kury, A. B. 2003: 169
Acosta, L. E. 1996: 224
Moritz, M. 1971: 206
Soares, B. A. M. & Soares, H. E. M. 1954: 261
Soares, B. A. M. 1945: 376
Mello-Leitao, C. F. de 1932: 155
Roewer, C. F. 1929: 197
Strand, E. 1926: 43
Roewer, C. F. 1913: 68
Bertkau, P. 1880: 6
Koch, C. L. 1839: 9
Koch, C. L. 1839: 7
1839
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