Neonella gyrinus, Salgado & Ruiz, 2018

Salgado, Alexandre & Ruiz, Gustavo R. S., 2018, Two new species of Neonella Gertsch, 1936 (Araneae: Salticidae: Euophryini), Zootaxa 4394 (4), pp. 537-548 : 538-540

Neonella gyrinus sp. nov.

Figs 1–2

Type material. Holotype: ♂ from Parque Estadual do Cantão , 09°18'19.3"S, 49°57'28.1"W, Caseara, Tocantins, Brazil, 11 May 2016, A. Bonaldo et al. ( MPEG 32806 ).

Etymology. The epithet is a Latin noun in apposition and means “tadpole”, in reference to the shape of the embolus and embolic disc in ventral view.

Diagnosis. Among all species of Neonella , N. gyrinus sp. nov. is similar to N. acostae Rubio, Argañaraz & Gleiser, 2015 , N. camillae Edwards, 2003 , N. noronha Ruiz, Brescovit & Freitas, 2007 and N. salafraria Ruiz & Brescovit, 2004 in having a long and coiled embolus emerging from the retrolateral side of the embolic disc ( Figs 2B–C ; see also Rubio et al. 2015: figs 4A–D). The embolus in N. salafraria (see Ruiz & Brescovit, 2004: figs 2–3) and N. noronha (see Ruiz et al. 2007: figs 12–13) is longer, with part of coil projecting over the retrolateral side of tegulum, while in N. acostae (see Rubio et al. 2015: figs 2B–C), N. camillae (see Edwards 2003: fig. 5) and N. gyrinus sp. nov. ( Figs 2B–C ), the coiled embolus is shorter and projected only along the distal portion of cymbium. However, N. gyrinus sp. nov. differs from these two species by having a single stout RPA with a rounded tooth on the ventral border ( Figs 2B, 2D, 2F ), while in N. acostae the RPA is pointed (see Rubio et al. 2015: figs 2B–C) and in N. camillae there are three patellar apophyses, one longer and spatulate and two short and triangular (see Edwards 2003: fig. 6).

Description. Male holotype (MPEG 32806). Total length: 1.30. Carapace 0.72 long, 0.54 wide and 0.36 high. Ocular quadrangle 0.31 long. Anterior eye row 0.56 wide, posterior 0.54 wide. Cheliceral teeth inconspicuous. Palp ( Figs 2A–F ): femur with prolateral ventral depression ( Fig. 2A ); patella and tibia short, about same length; cymbium oval and elongate ( Fig. 2D ); tegulum with lobe prolaterally curved ( Fig. 2C ) and slightly curved PSPL ( Fig. 2E ); embolic disc simple, with no conspicuous modification ( Figs 2A–C ); embolus coils half circle (counterclockwise in left palp, Fig. 2C ). Legs: unknown (both II, IV lost). Length of leg: I 0.75 (0.23 + 0.39 + 0.13); III 1.21 (0.41 + 0.43 + 0.37). Color in alcohol: cephalic area black; thoracic area dark brown with a yellow longitudinal median stripe and yellow lateral sides, black borders; opisthosoma dorsally pale with two longitudinal dark brown stripes, which connect distally; laterally variegated with dark brown; ventrally pale, light brown distally; legs light brown, with black spots on femora and distally on patellae ( Figs 1A–C ).

Female. Unknown.

Distribution. Known only from the type locality (state of Tocantins, Brazil).

Natural History. The holotype was collected from the ground in an area of Cerrado, a drier biome, using a pitfall trap.

Figures

FIGURE 1. Neonella gyrinus sp. nov., male holotype (A dorsal, B ventral, C lateral).

FIGURE 2. Neonella gyrinus sp. nov., left male palp (A prolateral, B retrolateral, C ventral, D dorsal, E cleared, proventral, F palpal patella, dorsal). Em, embolus; ED, embolic disc; PSPL, prolateral spermophore loop; RPA, retrolateral patellar apophysis; RTA, retrolateral tibial apophysis;SP, spermophore; TL, tegular lobe.