Holcobunus dissimilis, Tourinho, Ana Lúcia, Pinto-Da-Rocha, Ricardo & Bragagnolo, Cibele, 2015

Tourinho, Ana Lúcia, Pinto-Da-Rocha, Ricardo & Bragagnolo, Cibele, 2015, Taxonomic notes on Holcobunus Roewer, 1910, with descriptions of three new species, and new records for Holcobunus nigripalpis Roewer, 1910 (Opiliones: Eupnoi: Sclerosomatidae), Zootaxa 4027 (3), pp. 425-436 : 427-429

publication ID	https://doi.org/ 10.11646/zootaxa.4027.3.6
publication LSID	lsid:zoobank.org:pub:A3F9E54F-A59B-4DFC-8F88-AFD5FEDE5B2C
DOI	https://doi.org/10.5281/zenodo.6119980
persistent identifier	https://treatment.plazi.org/id/03926F62-FFED-FFE0-D2ED-FC4DFCCA3E6A
treatment provided by	Plazi
scientific name	Holcobunus dissimilis
status	sp. nov.

Treatment

Holcobunus dissimilis View in CoL sp. nov.

Figs. 1 View FIGURE 1 , 2 View FIGURE 2 , 7 View FIGURE 7

Etymology. From Latin dissimilis (dis- + similis = different, unlike or dissimilar) is given in reference to the highly different color pattern between males and females of this species.

Type locality. Brasil, Espírito Santo, Santa Teresa, Estação Biológica Santa Lúcia (19º58’36”S – 40 º32’06”W, 867 m),

Type material. Brasil, Espírito Santo, Santa Teresa, Estação Biológica Santa Lúcia, D. Mota leg., 25.VIII.2006; male holotype (MZSP-29514); idem, 1 male paratype (MZSP-29516), REBIO Augusto Ruschi, R. Pinto-da-Rocha, C. Bragagnolo & M.B daSilva leg., 11.IV.2009; 1 male paratype ( MZSP 57151); idem, 2 males, 6 females paratypes (MNRJ-17968), T.G. Souza leg., 26.VIII.2006; 2 males, 4 females paratypes (MNRJ-18627), C.O. Azevedo et al. leg, 10.VI.2001.

Distribution. Known only from mountains of Espirito Santo State in the municipality of Sanat Tereza ( Fig. 7 View FIGURE 7 ).

Diagnosis. Male: specimens preserved in ethanol have yellow body, eye mound black, abdomen with large dark median stripe along its full extent ( Fig. 1 View FIGURE 1 A, C), legs black, coxae I–II dorsally with pale yellow spots. Femur, patella and proximal half of pedipalpal tibia black, proximal half of tibia and tarsus cream, chelicerae black ( Fig. 1 View FIGURE 1 A–C). Eye mound armed with sharp granules ( Fig. 1 View FIGURE 1 C). Femoral nodule formula: 2/4-5/2-3/3-4. Dorsal orifice of anterior shaft of penis lacking ( Fig.2 View FIGURE 2 A, see also Tourinho & Kury, 2001, Fig. 37), glans with three pairs of subapical setae ( Fig. 2 View FIGURE 2 C, E).

Description. Lengths: body: 2.75 mm, carapace: 0.85 mm, chelicera: 0.6 mm, pedipalps: 2.82 mm. Femora: 10.5/18.7/10.2/ 14.4 mm. Dorsal surface: body surface reticulate. Supracheliceral lamina armed distally with one triangular and crenulated tubercle on each lobe. Eye mound armed with two rows of 10 or more sharp granules. Ventral surface reticulate. Lateral margins of genital operculum unarmed, arculi genitales II unarmed. Chelicerae: ventrobasal spine of basichelicerite blunt. Pedipalps: femur armed with ventral row of sharp pointed tubercles. Patella, including inner apophysis, armed with dorsolateral sharp-pointed tubercles, inner apical apophysis longer than wide. Tibia armed with sharp tubercles. Tarsus unarmed. Legs: femoral pseudoarticular formula: 2/5/2/2-3. Penis ( Fig. 2 View FIGURE 2 ): morphology very similar to H. nigripalpis . Winglets longer than wide, narrower than shaft, rift depressions (see Tourinho & Kury, 2001, Fig. 35–36) of shaft present ( Fig. 2 View FIGURE 2 A–B), ventral collar of winglet present but not marked ( Fig. 2 View FIGURE 2 B and D), shaft almost straight. Dorsal and ventral faces of glans not depressed, with three pairs of subapical setae ( Fig. 2 View FIGURE 2 C–F). Stylus straight not bent in ventral or lateral view ( Fig. 2 View FIGURE 2 C).

Female paratype ( Fig.1 View FIGURE 1 D–E): length: Body: 4.1 mm, carapace: 0.85 mm, abdominal dorsal scute: 2.9 mm, chelicera: 0.6 mm, pedipalps: 3.0 mm. Color: dorsal background brown with a white arch surrounding anterior prosoma and several white spots and stripes distributed on scute, eye mound darkish brown with a white stripe surrounding the contour of the eye ( Fig.1 View FIGURE 1 D,F). Trochanter I–IV cream with darkish lateral spots, coxae with darkish brown spots ( Fig.1 View FIGURE 1 D). Legs: femoral nodule formula: 2/4-5/3/3-4, femur, patella and proximal half of pedipalpal tibia black, proximal half of tibia and tarsus cream, chelicera cream with a dorsal darkish spot on fixed finger. Ventral surface cream ( Fig.1 View FIGURE 1 .F,E). Dorsal and ventral surfaces: as in the male, except the body swollen dorsoventrally and by having an articular membrane isolating all sclerites. Membrane much evident, widely surpassing sclerites.

Remarks. This species has external and genital morphology very similar to H. nigripalpis , but is distinguished by the large black stain present on male dorsal scute and the lack of dorsal orifice on anterior portion of penis shaft present in H. nigripalpis ( Tourinho & Kury, 2001. Fig. 37)