Holcobunus dissimilis Tourinho, Pinto-Da-Rocha & Bragagnolo, 2015, sp. nov.
Creators: name: Tourinho, Ana Lúcia
name: Pinto-Da-Rocha, Ricardo
name: Bragagnolo, Cibele
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Sclerosomatidae
Holcobunus
Holcobunus dissimilis

description: Holcobunus dissimilis sp. nov.
Figs. 1, 2, 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).
Diagnosis. Male: specimens preserved in ethanol have yellow body, eye mound black, abdomen with large dark median stripe along its full extent (Fig. 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 A–C). Eye mound armed with sharp granules (Fig. 1 C). Femoral nodule formula: 2/4-5/2-3/3-4. Dorsal orifice of anterior shaft of penis lacking (Fig.2 A, see also Tourinho & Kury, 2001, Fig. 37), glans with three pairs of subapical setae (Fig. 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): 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 A–B), ventral collar of winglet present but not marked (Fig. 2 B and D), shaft almost straight. Dorsal and ventral faces of glans not depressed, with three pairs of subapical setae (Fig. 2 C–F). Stylus straight not bent in ventral or lateral view (Fig. 2 C).
Female paratype (Fig.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 D,F). Trochanter I–IV cream with darkish lateral spots, coxae with darkish brown spots (Fig.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.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)
description: Published as part of 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), pp. 425-436 in Zootaxa 4027 (3) on pages 427-429, DOI: 10.11646/zootaxa.4027.3.6, http://zenodo.org/record/241194