Ochyrocera tinocoi,

Castanheira, Pedro De Souza, Pérez-González, Abel, Prado, André Wanderley Do & Baptista, Renner Luiz Cerqueira, 2019, Three new species of Ochyrocera (Araneae, Ochyroceratidae) from Southeastern Brazil, Zootaxa 4657 (3), pp. 523-544: 525-530

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Ochyrocera tinocoi

new species

Ochyrocera tinocoi  new species

( Figs. 1–4View FIGURE 1View FIGURE 2View FIGURE 3View FIGURE 4; 14AView FIGURE 14)

Type material. Holotype: BRAZIL, Espírito Santo: Sooretama  : REBIO Sooretama  , ( Quirinão , 18º59’35.6”S, 40º08’058”W), 03.VIII.2011, litter sieving [protocol collecting method], D. T. Castro coll. (1 male, MNRJ 06844)GoogleMaps  . Paratypes: BRAZIL, Espírito Santo: Sooretama  : REBIO Sooretama  ( Trilha informativa 19º03’39.7”S, 40º08’84.1”W), 4.VIII.2011, litter sieving, D. T. Castro coll. (1 female, UFRJ 1030; 1 female, UFRJ 1046)  ; idem, REBIO Sooretama  ( Quirinão 18º59’35.6”S, 40º08’058”W), 1–4.II.2011, pitfall traps, R. Baptista & D. T. Castro coll. (2 males, MACN-Ar 34856 ex UFRJ 1031); 02.II.2011, litter sieving, D. T. Castro coll. (1 male, UFRJ 1047).GoogleMaps 

Other material examined. BRAZIL, Espírito Santo: Sooretama: Reserva Biológica de Sooretama, Trilha  informativa (19º03’39.7”S, 40º08’84.1”W), 06–09.XI.2009, pitfall traps, R. Baptista & D. T. Castro coll. (1 male MACN-Ar 35082 ex UFRJ 1028)GoogleMaps  ; 07.XI.2009, litter sieving, D. T. Castro coll. (2 females, MNRJ 06855, burned in MNRJ fire)GoogleMaps  ; 1–4.II.2011, pitfall traps, R. Baptista & D. T. Castro coll. (1 male, MACN-Ar 35081 ex UFRJ 1029)GoogleMaps  ; 03.II.2011, litter sieving, D. T. Castro coll. (1 male, MNRJ 06856, burned in MNRJ fire)GoogleMaps  ; idem, Reserva Biológica de Sooretama  ( Quirinão 18º59’35.6”S, 40º08’058”W), 02.II.2011, litter sieving, D. T. Castro coll. (1 female, UFRJ 1024)GoogleMaps  ; 03.VIII.2011, litter sieving, D. T. Castro coll. (1 female, MACN-Ar 35083 ex MNRJ 06845).GoogleMaps 

Etymology. The specific epithet is a patronymic in honor to Diogo Tinoco Castro, a Brazilian arachnologist and also a close friend to the authors, better known among his friends by his middle name “Tinoco”, who collected (together with R. Baptista) all the studied specimens of this species.

Diagnosis. This species resembles Ochyrocera quinquevittata Simon, 1891  , O. cachote Hormiga et al., 2007  and other species from Caribbean Islands, Central America and Mexico, as males bear a distinctive apophysis at the retrolateral side of the cymbium (see Discussion section below). Males of O. tinocoi  new species are diagnosed from these species by the ‘S’-shaped cuspule at the apex of the apophysis, a perfectly oval tegulum and a divided embolic complex ( Figs. 2AView FIGURE 2, 3View FIGURE 3 A–D, Simon 1891, fig. 11, Hormiga et al. 2007, figs. 2A–B, 8A–C). On the other hand, O. tinocoi  new species share the divided embolic complex with O. misspider  , but this species has a more elongated palpal tibia and a cymbium with a distal apophysis and no retrolateral apohysis ( Brescovit et al. 2018, figs. 13C–D, 14A–D).

Females are similar to O. garayae  new species as both species share a large and wide membranous sac (maybe a membranous uterus externus, instead of a columnar one), which forms an anterior flap, and slender, tubular spermathecae ( Figs. 2CView FIGURE 2; 6CView FIGURE 6). Ochyrocera tinocoi  new species may be recognized by the anterior triangular, bell-like flap, and comma-shaped, longer, tubular spermathecae ( Fig. 2CView FIGURE 2). Finally, males and females of O. tinocoi  new spe- cies share with O. itatinga  new species similar body shape, size and colour pattern, but O. tinocoi  new species has darker greenish blue carapace, sternum and abdomen. Males of both species also share macrosetae on clypeus, over the ocular area and a little behind it ( Figs. 1View FIGURE 1 A–B; 10 A–B).

Description. Male (Holotype MNRJ 06844): Measurements: Total length (prosoma + opisthosoma) 1.21. Carapace 0.52 long, 0.51 wide, 0.23 high.Abdomen 0.69 long, 0.45 wide, 0.46 high. Cephalothorax, sternum and abdomen bluish green. Prosoma: Carapace ovoid, greenish yellow, with one median longitudinal dark blue strip from the back of the eyes towards its posterior margin and two other thinner and dark lateral blue strips, running in parallel from the base of the palp towards its posterior margin ( Fig. 1AView FIGURE 1). Fovea visible. Sternum greenish yellow with two longitudinal marginal dark blue strips ( Fig. 1CView FIGURE 1). Chelicerae with paturon and fangs coloured as body, with seven reddish yellow subequal promarginal teeth attached to the slightly bifurcated lamina ( Fig. 2BView FIGURE 2). Eyes: Six eyes divided in three dyads, ocular area slightly elevated, PME more elevated than the others. One long, curved, macroseta projected from the base of each eye dyad and three additional macrosetae in the median line of carapace, projected toward the eyes, besides two smaller macrosetae on clypeus, placed just below the anterior eyes ( Figs. 1View FIGURE 1 A–B). Legs: Leg I with three tarsal claws. Prolateral superior claw with two rows of teeth, the inner row with small teeth, short, only at the apical third. Retrolateral claw with a single outer row of teeth ( Fig. 3EView FIGURE 3). Opisthosoma ( Figs. 1View FIGURE 1 A–C; 4A): oval, relatively short, dorsum blue interspersed with greenish pigment, without strips. Venter mostly dark blue, with some scattered small lighter blue spots ( Fig. 1CView FIGURE 1). Series of pale blue spots aligned at each side, forming a line separating venter and sides of abdomen ( Fig. 1View FIGURE 1 B–C). Epiandrous with six fusules, divided in two groups of three each, slightly recurved, placed in a rugose depression anterior to epigastric furrow, fusule base globular ( Fig. 3GView FIGURE 3). Spinnerets: colulus triangular, moderately developed, with few setae irregularly distributed ( Fig. 3FView FIGURE 3, arrow); ALS with one major ampullate gland spigot accompanied by a nubbin and five piriform spigots ( Fig. 4BView FIGURE 4). PMS with one spigot ( Fig. 4CView FIGURE 4). PLS has a compactly packed row of 11 aciniform gland spigots with long bases ( Fig. 4DView FIGURE 4). Genitalia: Palpal femur tubular ( Fig. 2AView FIGURE 2), tibia elongated, incrassate, with thin basis, but widening towards its apex ( Fig. 2AView FIGURE 2, 3AView FIGURE 3). Cymbium triangular, thick, with a well-defined tip, a stout and rounded pedestal on its basis, and a subdistal, slender and conical retrolateral cymbial apophysis, laterally directed in 45°, ending in a long S-shaped cuspule ( Figs. 2AView FIGURE 2; 3AView FIGURE 3, C–D). Tegulum ovoid ( Figs. 2AView FIGURE 2; 3AView FIGURE 3) with sperm duct diameter tapering from fundus to opening ( Figs. 2AView FIGURE 2). Embolus with a wide and long tubular basis, reaching up to ¼ of the whole structure length, bearing a divided terminal embolic complex formed by two long branches of similar length. The prolateral branch is the embolus itself (E), originating at the inner corner of the basis, tubular, moderately long, its apex bearing a slit duct opening and a very acute tip. At the outer corner of the basis, a retrolateral branch ( RtB) originates, shaped as a laminar and flattened ribbon-like projection, tapering regularly from its apical third up to its acute tip, which is placed near the embolus tip ( Figs. 2AView FIGURE 2; 3View FIGURE 3 A–B).

Female (Paratype UFRJ 1030): Measurements: Total length 1.11. Carapace 0.51 long, 0.51 wide, 0.29 high. Abdomen: 0.61 long, 0.46 wide, 0.45 high. Colouration and markings as in male ( Figs. 1View FIGURE 1 D–F). Sternum as in male but slightly lighter ( Fig. 1FView FIGURE 1). Carapace and opisthosoma, legs and eyes similar to male, but abdomen more roundish, higher and shorter. Genitalia: vulva with two tubular, slender, comma-shaped spermathecae, slightly thicker towards its tip, with two large glandular pore plates near its basis. Large and robust bell-like membranous sac (uterus externus?) poorly sclerotized, forming a wide anterior triangular flap ( Fig. 2CView FIGURE 2).

Natural History. All specimens found in forest litter. Some specimens were observed in small tangled, sheetwebs among leaves and twigs on the upper portion of the litter layer.

Distribution. Only known from type locality ( Fig. 14AView FIGURE 14).


Peabody Essex Museum