Magnispina bahiana Gueratto & Mendes & Pinto-Da-Rocha 2017, sp. nov.
Creators: name: Gueratto, Caio
name: Mendes, Amanda Cruz
name: Pinto-Da-Rocha, Ricardo
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Gonyleptidae
Magnispina
Magnispina bahiana

description: Magnispina bahiana sp. nov.
(Figs. 0 2, 03E–H, 0 4 D–F, and 0 6 E –F)
Type material. BRAZIL. Bahia: Camacan (RPPN Serra Bonita, riacho da estrada, 15°23’12.4” 39°34’04.9”W), S. Outeda-Jorge leg., 2.IX.2014, male holotype (MZSP 70876); ditto, 5 male and 3 female paratypes (MZSP 70877); ditto, 1 male and 1 female paratypes (MNRJ 9254); ditto 1 male and 1 female paratypes (IBSP 10728).
Etymology. From the Portuguese, referring to the Brazilian state of Bahia, where this species was collected.
Diagnosis. Magnispina bahiana sp. nov. resembles M. neptunus by: presence of a median apophysis on free tergites II–III and the femur IV with two curvatures (‘S-shaped’). It differs from M. neptunus by: the reduced size of the median apophysis on free tergite II (approximately the same tergite length in M. neptunus), presence of bifurcate tubercles on the lateral margins of free tergite II (single and larger in M. neptunus), large row of single tubercles on ventral anal operculum (two bifid on each side in M. neptunus), femur IV with a cubic dorsomedian apophysis (dorsobasal in M. neptunus) and a prolateral row of tubercles increasing in size apically (larger tubercles in the median part of the row in M. neptunus), 4 pairs of MS C in the laterodistal part of the ventral plate (3 pairs in M. neptunus).
Description. Male holotype: Dorsum (Fig. 2 A, C, D): Measurements: Dorsal scutum: L including fused free tergites: 5.4; W: 5.5. Prosoma: L: 1.5; W: 2.6. Femur IV: L: 3.8.. Scutum outline typical γ type, widest at dorsal scutum area II. Anterior margin of carapace with few tubercles on each side. Frontal hump with sparse tubercles. Ocularium with 1 pair of paramedian tubercles, (Fig. 2 A, C) these as tall as the eye diameter. Carapace with sparse small tubercles on its posterior margin. Abdominal dorsal scutum divided into three areas; dorsal scutum area I divided by median longitudinal groove, with 3 tubercles on each half; dorsal scutum area II with 1 pair of paramedian large tubercles and 2 tubercles on each side; dorsal scutum area III with 1 pair of paramedian large tubercles, 1 pair of tubercles at their posterior base; no vestiges of transversal groove separating in dorsal scutum areas III and IV. Lateral margin of dorsal scutum with row of tubercles increasing in size posteriorly until dorsal scutum groove III. Posterior margin of the dorsal scutum with a row of tubercles of same size. Free tergites I–II fused to the dorsal scutum; free tergite I with a row of rounded tubercles. Free tergite II with a row of 8 tubercles, median robust spiniform apophysis curved backwards (as long as dorsal scutum area I length) and one bifurcate large tubercle on each corner. Free tergite III with a row of small rounded tubercles (Fig. 2 A, C, D) and a median robust apophysis, unarmed on the corners. Dorsal anal operculum with sparse small tubercles (Fig. 2 D). Venter. Coxa I with a row of 6 large tubercles and few small sparse ones, coxa II with a row of 8 tubercles, coxa III small tuberculate and coxa IV smooth. Ventral anal operculum with a row of 10 rounded tubercles (Fig. 2 D). Chelicerae. Segment I with 1 prolateral and 1 retrolateral subapical tubercles. Fixed and movable fingers each with 5 teeth. Pedipalps. Trochanter with 3 ventral setiferous tubercles. Femur with ventral row of 4–5 setiferous tubercles and a subapical prolateral macrosetae. Tibial setation: prolateral I Ii and retrolateral iIi. Tarsal setation: prolateral IiIi and retrolateral IiiI. Legs. Coxae I–III as in the subfamily (Mendes, 2011). Trochanters, patellae and tibiae I–III unarmed. Femora I–II unarmed. Femur I ventral face with row of tubercles. Calcaneus I swollen, thicker than the astragalus I. Femur III ventral face with a row of tubercles increasing in size progressively towards the apex. Calcaneus III smaller than one third of metatarsus III. Coxa IV with a prolateral apical blunt apophysis (Fig. 2 A).
Trochanter IV with 1 dorsal prolateral apical blunt apophysis and 1 apical retrolateral curved apophysis (Fig. 3 E). Femur IV (Fig 3 G, H) distinctly curved (convex side outwards) in dorsal view (Fig. 3 E), with two curvatures (‘Sshaped’) in lateral view, bearing 3 longitudinal rows of rounded tubercles (dorsal, pro- and retrolateral). Femur IV dorsal face without dorsobasal apophysis and bearing dorsomedian, large and cubic apophysis; pro- and retrolateral rows of tubercles composed by conspicuous blunt tubercles on the apical half, and small rounded tubercles on the basal half; apex (Fig. 3 F and H) with 1 retrolateral and 1 prolateral large tubercles (prolateral one largest). Femur IV ventral face with 2 rows of similar size tubercles and a large proapical tubercle (Fig. 3 H). Tarsal counts: 6/9/6/6. Male genitalia (Fig. 4 D–F). Ventral plate with distal border slightly concave and depressed on basal half, with 1 mediolateral pair of robust MS A; a laterodistal row of 4 pairs of MS C; and 1 pair of lateral MS D; ventrodistal half with 2 pairs of small bulb like MSE (distal and subdistal). Glans with digitiform dorsal process. Stylus apex smooth. Color (in ethanol) (Fig. 6 E). Background of the body reddish dark-brown, with dorsal scutum reticulated with black, darker in the margins and with a yellowish transversal line in the middle of dorsal scutum areas II and III. Chelicerae and pedipalps yellow, reticulated with dark brown. Trochanters I–III yellowish shaded with dark brown spots. Metatarsi and tarsi III–IV yellow.
Female (paratype; MZSP 70877) (Figs 2 B, 6F): Measurements: Dorsal scutum: L: 4.7; W: 5.2. Prosoma: L: 1.8; W: 2.8. Femur IV: L: 3.8. Scutum outline typical α type, with a constriction at the dorsal scutum area III. Free tergites not fused to the dorsal scutum, free tergites II–III with small median spine. Apical prolateral apophysis of coxa IV spiniform and smaller than male. Trochanter IV only with apical retrolateral spiniform apophysis (Fig. 2 B). Femur IV unarmed and with longitudinal rows of similar size tubercles.
Variation. Males (n=7): Anterior margin of the carapace with 2–3 tubercles on each side. Ocularium can present 2 small tubercles at anterior and posterior parts besides the median ones. Lateral margin of dorsal scutum with 10–14 tubercles and posterior margin of dorsal scutum with 10–16 tubercles. Free tergite I with 10–16 tubercles. Free tergite II with 8–10 tubercles besides the ones on the corners.
description: Published as part of Gueratto, Caio, Mendes, Amanda Cruz & Pinto-Da-Rocha, Ricardo, 2017, Description of two new species of Magnispina and a new hypothesis of phylogenetic relationships for Heteropachylinae (Opiliones: Laniatores: Gonyleptidae), pp. 180-194 in Zootaxa 4300 (2) on pages 186-188, DOI: 10.11646/zootaxa.4300.2.2, http://zenodo.org/record/838095