Ochyrocera itatinga, Castanheira & Pérez-González & Prado & Baptista, 2019

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: 533-540

publication ID

https://doi.org/10.11646/zootaxa.4657.3.6

publication LSID

lsid:zoobank.org:pub:089DE6DA-7F80-425B-BA79-516B9FE6E587

persistent identifier

http://treatment.plazi.org/id/9C316622-626F-FFFF-FF51-71FFFC867802

treatment provided by

Plazi

scientific name

Ochyrocera itatinga
status

new species

Ochyrocera itatinga   new species

( Figs. 10–14A View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 View FIGURE 14 )

Type material. Holotype: BRAZIL, Rio de Janeiro: Rio de Janeiro: Parque Estadual da Pedra Branca, Camorim, Açude , 22°58’08.3”S, 43°26’38.5”W, 342 m, 31.III.2014,litter sieving, R. Baptista coll.(1 male, MNRJ 06841) GoogleMaps   . Paratypes: BRAZIL, Rio de Janeiro: Rio de Janeiro: Parque Estadual da Pedra Branca, Camorim ( Açude 22°58’08.3”S, 43°26’38.5”W, 342 m), 31.III.2014, litter sieving, R. Baptista coll. (1 female, MNRJ 06840) GoogleMaps   ; 02.VI.2013, litter sieving, R. Baptista coll. (1 female, UFRJ 1010) GoogleMaps   ; 15.IX.2013, litter sieving, R. Baptista coll. (1 male, MACN-Ar 34859, ex UFRJ 1015) GoogleMaps   ; idem, Parque Estadual da Pedra Branca , Pau-da-Fome (trilha da Figueira 22°55’57.0”S, 43°26’32.3”W, 138 m), 12.VI.2013, litter sieving, R. Baptista coll. (1 female, MACN-Ar 34860 ex UFRJ 1016) GoogleMaps   ; idem, Parque Estadual da Pedra Branca , Pau-da-Fome [Trilha informativa (= interpretation walking trail), ruínas (Padaria) 22°56’12.8”S, 043°26’29.1”W, 133 m], 16.III.2014, litter sieving, R. Baptista coll. (1 male, UFRJ 1011) GoogleMaps  

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Other material examined. BRAZIL, Rio de Janeiro: Rio de Janeiro: Parque Estadual da Pedra Branca, Camorim ( Sede 22°56’12.8”S, 43°26’29.1”W, 160 m) GoogleMaps   , 07.IV.2014, cryptic, P. Castanheira coll. (1 female, MACN- Ar 35084 ex UFRJ 1012); idem, Parque Estadual da Pedra Branca, Camorim ( Açude 22°58’08.3”S, 43°26’38.5”W, 342 m) GoogleMaps   , 01.VI.2013, cryptic, R. Baptista coll. (1 immature, UFRJ 1013); 14.IX.2013, cryptic, R. Baptista coll. (1 immature, UFRJ 1014); 15.IX.2013, litter sieving, R. Baptista coll. (1 female, MACN-Ar 35087 ex UFRJ 1015); idem, Parque Estadual da Pedra Branca, Pau-da-Fome (trilha da Figueira 22°55’57.0”S, 43°26’32.3”W, 138 m) GoogleMaps   , 13. VI.2013, looking down, R. Baptista coll. (1 female, MACN-Ar 35086 ex UFRJ 1017); 22.IX.2013, litter sieving, R. Baptista coll. (1 female, UFRJ 1018); 10.XII.2013, litter sieving, P. Castanheira coll. (2 females, 1 immature, UFRJ 1019); 9–17.XII.2013, pitfall traps, R. Baptista & P. Castanheira coll. (1 female, UFRJ 1020); 16.III.2014, litter sieving, R. Baptista coll. (1 male, MNRJ 06858, burned in MNRJ fire); idem, Parque Estadual da Pedra Branca, Pau-da-Fome [Trilha informativa (= interpretation walking trail), ruínas (Padaria)] GoogleMaps   22°56’12.8”S, 043°26’29.1”W, 133 m), 1–9.VI.2013, pitfall traps, R. Baptista & P. Castanheira coll. (1 immature, UFRJ 1021); 22.IX.2013, litter sieving, P. Castanheira coll. (1 female, MNRJ 06857, burned in MNRJ fire); 23.IX.2013, litter sieving, R. Baptista coll. (1 male, MACN-Ar 35080 ex UFRJ 1022); 16.III.2014, litter sieving, R. Baptista coll. (3 females, 1 immature, UFRJ 1023).

Etymology. The specific epithet “itatinga” is a Tupi word, language used by Indian tribes that lived in Rio de Janeiro city, and is a direct translation of the Portuguese name of the type-locality, Pedra Branca.

Diagnosis. This species is more similar to O. viridissima Brignoli, 1974   , and O. diablo Pérez-González, Rubio & Ramírez, 2016   , as all three share a small ovoid cymbium, with a very protruding and large pedestal, and an apophysis abruptly arising near the retrolateral apical margin. Females of all three species also have an elongate and columnar uterus externus, with several rings, and an oval abdomen, near as high as long ( Brignoli 1974, figs. 1, 2, 6; Pérez-González et al. 2016, figs. 7C–D, F, 9A–E; Figs. 11A, C View FIGURE 11 , 12 View FIGURE 12 A–C). However, the males of O. itatinga   new species and O. diablo   are easily separated from O. viridissima   by the palpal tibia shorter and inflated at the basal half and by the straight cymbial apophysis, bearing a claw-like terminal cuspule ( Brignoli, 1974, figs. 1, 6; Pérez-González et al., 2016, figs. 7C–D, 9A–E; Figs. 11A View FIGURE 11 , 12 View FIGURE 12 A–C). Finally, O. itatinga   new species may be recognized by long macrosetae on the eye region, wider and more inflated palpal tibia, longer and thinner tegulum, a well-marked transition between the tegulum and the more elongated sickle-like embolus, with a long and straight filiform tip ( Figs. 10 View FIGURE 10 A–B, 11A, 12A, C). The female vulva of O. itatinga   new species and O. viridissima   bear short spermatheca and a columnar uterus externus apparently without a neck and a ragged tip ( Brignoli, 1974, fig. 2; Fig. 11C View FIGURE 11 ). Ochyrocera itatinga   new species is set apart by a much widerspermatheca, apparently without an adjoining pore plate and by the much longer and thinner columnar uterus externus ( Fig 11C View FIGURE 11 ).

Description. Male (Holotype MNRJ 06841): Measurements: Total length (prosoma + opisthosoma) 1.13. Carapace 0.53 long, 0.46 wide, 0.13 high. Abdomen 0.61 long, 0.44 wide, 0.40 high. Prosoma: Cephalothorax with light yellow background ( Fig. 10A View FIGURE 10 ). Carapace ovoid with one median longitudinal navy blue stripe from the back of the eyes towards its posterior margin and two other navy blue stripes laterally, running in parallel from the base of the palps towards its posterior margin ( Fig 10A View FIGURE 10 ). Fovea covered in blue ( Fig. 10A View FIGURE 10 ). Sternum pale yellow with two longitudinal lateral dirty pale blue strips ( Fig. 10C View FIGURE 10 ). Chelicerae bluish green, with reddish yellow fangs bear ing eight subequal promarginal teeth attached to the lamina ( Fig 11B View FIGURE 11 ). Eyes: Six eyes slightly elevated moderately divided in three groups, PME more elevated than the others ( Figs. 10B View FIGURE 10 ). One long macroseta projected from the base of each group of eyes, in a total of three, in addition to one fourth macrosetae in the medium part of carapace projected toward the eyes ( Fig. 10B View FIGURE 10 ). Legs: Leg I with three tarsal claws. Prolateral superior claw bears two rows of teeth, inner row with two small teeth at the apical third, outer row with three unequal teeth, the distal one larger and connected to a curtain-like wrinkled plate extending to the basis of the claw, the median tooth small and the basal tooth intermediate in size, both placed externally to the wrinkled plate. Retrolateral claw with a single row of teeth ( Fig. 12 View FIGURE 12 E–F). Opisthosoma ( Figs. 10 View FIGURE 10 A–C; 12D): Abdomen bluish green, ovoid and relatively short without strips on the dorsum ( Fig. 10A View FIGURE 10 ). Venter dominated by blue spots of a similar colour growing in quantity towards the spinnerets ( Fig. 10C View FIGURE 10 ). Epiandrous with five fusules clearly divided in two groups, one with two and the other with three fusules. All fusules with globular base and linearly arranged (recurved) in a rugose depression anterior to epigastric furrow ( Fig. 12 View FIGURE 12 G–H). Anal tubercle much wider the high, rounded by few setae ( Fig. 13E View FIGURE 13 ). Spinnerets ( Fig. 13 View FIGURE 13 ): colulus well developed and shaped as an inverted water drop ( Fig 13 View FIGURE 13 A–B); ALS with one major ampullate gland spigot, a nubbin and five piriform spigots ( Fig. 13D View FIGURE 13 ); PMS with one minor ampullate spigot ( Fig. 13C View FIGURE 13 ); PLS with a compactly packed row of 12 aciniform gland spigots with long bases ( Fig.13C View FIGURE 13 ). Genitalia ( Figs. 11A View FIGURE 11 ; 12 View FIGURE 12 A–C): Palpal femur tubular ( Figs. 11A View FIGURE 11 ; 12A View FIGURE 12 ). Patella short, curved ( Figs. 11A View FIGURE 11 ; 12A View FIGURE 12 ). Tibia inflated and wider near its basis ( Figs. 11A View FIGURE 11 ; 12A View FIGURE 12 ). Cymbium small, ovoid, with a stout and protruding pedestal and a subdistal, slender finger-like apophysis, ending in a slightly curved cuspule ( Figs. 11A View FIGURE 11 ; 12A View FIGURE 12 ). Tegulum cylindrical, much longer than wider with sperm ducts diameter varying from large on the coiled fundus to much thinner near the middle of the tegulum, then nearly keeping its diameter in the remaining elongated and curved portion up to opening ( Fig. 11A View FIGURE 11 ). Tip of tegulum bevelled at its prolateral side, forming a clear constriction at the origin of the embolus, which originates from the retrolateral side of the tegulum ( Figs. 11A View FIGURE 11 ; 12A View FIGURE 12 ). Embolus sickle-like, very elongated, more than 2x longer than the tegulum, with its straight and filiform tip clearly separated by a constriction ( Figs. 11A View FIGURE 11 ; 12A, C View FIGURE 12 ).

Female (Paratype MNRJ 06840): Measurements: Total length 1.15. Carapace 0.48 long, 0.45 wide, 0.2 high. Abdomen 0.71 long, 0.60 wide, 0.69 high. Colouration and markings as in male but lighter ( Figs. 10 View FIGURE 10 D–F). Sternum as in male but with slightly darker and wider lateral stripes ( Fig. 10F View FIGURE 10 ). Carapace, eyes and opisthosoma as in male ( Figs 10 View FIGURE 10 D–F). Legs purple with yellow and green marks on edge of articles and tarsus, as in male ( Figs. 10 View FIGURE 10 D–F). Venter of opisthosoma with darker colour in comparison to male with suffused yellowish pigment throughout ( Fig. 10F View FIGURE 10 ). Genitalia: vulva with two tubular rounded spermathecae with few glandular pores; uterus externus columnar, elongated, approximately 2x as long as the spermathecae, upward projected, laterally bent, weakly sclerotized, with 17 internal rings and apparently without a neck ( Fig. 11C View FIGURE 11 ).

Natural History. The specimens were collected from the forest litter, in small sheet-webs among fallen trunks (with sieving and cryptic techniques) and twigs and also from pitfall-traps on the forest ground.

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

PMS

Peabody Essex Museum