Serracutisoma hara Gomes-Silva & Dasilva, 2025, sp. nov.
Creators: name: Gomes-Silva, José Geovane
name: Dasilva, Marcio B.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Gonyleptidae
Serracutisoma
Serracutisoma hara

description: Serracutisoma hara sp. nov. (Fig. 2, 3, 5 and 6)
Type material: 1 male holotype (MZSP 18974) from Gruta do Botuverá, Botuverá, Santa Catarina. 9/V/1998, R. Pinto-da-Rocha.
Diagnosis: Similar to other species of S. inerme group. It differs by the combination of armature of femur III with spines close to each other and armature of row 2 of femur IV with spines only in the medial-apical portion.
Etymology: In honor of the opilionologist, author of many species of Gonyleptidae, and friend, Marcos Hara.
Distribution: Only known from the type locality.
Description (figure 2A–B): Ocularium with 1 pair of medium tubercles, separated and close to the eyes; carapace with 6 minute granules; areas I, II and III with, respectively, 10, 10 and 6 medium granules; area I with 1 pair of small tubercles; area III with 1 pair of medium spines; dorsal scutum: lateral margin with low density of minute granules; posterior margin and free tergites practically smooth; angles of the free tergites with a pair of medium granules.
Chelicerae: First segment with 4 dorso-basal tubercles, 1 prolateral dorso-apical tubercle and 1 apical retrolateral tubercle; second segment with a medium density of granules.
Pedipalps (figure 2C): Trochanter with 2 medium granules and 1 apical ventral setiferous tubercle; femur with 8 ventral tubercles ‘IiiiIiii’, and 1 prolateral spine; patella with 1 large prolateral granule; tibia with elevation pattern on the retrolateral ventral setae ‘IiIi’, the penultimate larger, more thicker than the others, and fused with the last at the base and prolateral setae ‘IiIi’, with 4 small ventral granules and 1 small retrolateral tubercle pointed; tarsus with prolateral ventral setae ‘IIi’ and retrolateral setae ‘IiIi’.
Leg I: Coxa with 1 row of medium tubercles; trochanter with 1 large granule and 2 medium granules; femur, patella, and tibia with minute granules; metatarsus practically smooth.
Leg II: Coxa with 1 row of small tubercles; trochanter with 1 medium granule and low density of small granules; femur, patella, and tibia with minute granules, row 4 of tibia with sparse small spines; metatarsus practically smooth.
Leg III (figure 2D): Coxa with 1 row of minute granules; trochanter with 1 medium granule and a low density of small granules; femur with row 3 with spines close to each other in the apical region; femur, patella, and tibia with minute granules; metatarsus practically smooth.
Leg IV (figure 2E): Coxa with low density of minute granules, apical prolateral apophysis long and almost transverse with falciform apex, apical retrolateral apophysis like a small tubercle; trochanter with low density of minute granules, basal prolateral apophysis as a strong tubercle, apical dorsal prolateral apophysis curved upwards, apical retrolateral apophysis small, pointed, and with half size of the dorsal-prolateral apophysis; femur slightly S-shaped almost straight, with row 2 with 2 strong spines, close to each other, in the median to last third region; femur, patella and tibia with medium spines in apical portion; metatarsus with minute granules; tarsal claws smooth; tarsal process very small.
Tarsal segmentation: 9–10; 16–17; 11; 11–12.
Penis (figure 3C–D): Ventral plate hexagonal notably broader than long, lateral margin convex and apical margin slightly concave; all macrosetae spatulate; group A with 3 macrosetae arranged almost transversely; macrosetae B similar and aligned with the macrosetae of group A; group C with 3 pairs of macrosetae, C1 separated of the others; macroseta D half the size of the macrosetae of group C, aligned basally to group C; two macrosetae E half the size of the macrosetae of group C, E1 positioned between the two apical macrosetae of group C (C1 and C2) and E2 more ventral and between the two more basal macrosetae C (C2 and C3); glans has a long ventral process with a wide flabellum at the apex, with many projections on ventral margin; stylus straight and cylindrical.
Measurements. Dorsal scutum. Length: 8.6; width: 8.3; pedipalps: 13.8; legs: I: 47.2; II: 102.8; III: 71.9; IV: 95.3.
Coloration (in alcohol): dorsal scutum, legs I–III, tibia, metatarsus IV, pedipalps and spines of area III have a light-yellow coloration; carapace, apophyses of the coxa and trochanter IV, leg IV, trochanters of the other legs, and the ventral side of the body dark brown; articular membranes light pink; dry mark only on trochanter IV and the base of femur IV.
Female: Unknown.
description: Published as part of Gomes-Silva, José Geovane & Dasilva, Marcio B., 2025, Two new species of Goniosomatinae (Opiliones: Gonyleptidae) narrowly endemic to the Atlantic Forest of Brazil., pp. 16-28 in Zootaxa 5604 (1) on pages 20-22, DOI: 10.11646/zootaxa.5604.1.2, http://zenodo.org/record/15012448