Plato striatus, Prete, Pedro H., Cizauskas, Igor & Brescovit, Antonio D., 2018

Prete, Pedro H., Cizauskas, Igor & Brescovit, Antonio D., 2018, Three new species of the spider genus Plato and the new genus Cuacuba from caves of the states of Para and Minas Gerais, Brazil (Araneae, Theridiosomatidae), ZooKeys 753, pp. 107-162 : 132-133

Plato striatus sp. n. Figures 4, 16

Types.

Male holotype from Cave GEM_1786 (6°06'19"S, 44°08'18"W), Parauapebas, Pará, Brazil, 07/II/2011, R. Zampaulo et al., deposited in IBSP 176982.

Etymology.

The specific name is a masculine noun in apposition and means “striped” in Latin, referring to the darkened stripes on the male`s fourth pair of legs.

Diagnosis.

Plato striatus sp. n. resembles P. guacharo in the twisted projection of the conductor (see Brignoli 1972: fig. 22), and P. novalima sp. n. and P. ferriferus sp. n. in the rounded tegulum, posterior portion of conductor hyaline and partially overlapping the embolus, and longer than large bulb. It differs from these three species in the proximal portion of the conductor simple, arrow-shaped, twisted and pointing upwards, embolus with proximal apophysis elongated, distal apophysis fused to the membrane (Fig. 4 C–E) and fourth pair of legs with dark stripes on the articulations (Fig. 4A).

Description.

Male (Holotype, IBSP 176982). Cephalothorax brown, longer than wide. Sternum brown with darkened edges. Endite, labium, and chelicerae brown. Legs yellowish, stripes on articulations of the fourth pair. Abdomen dark grayish, longer than wide. Total length: 1.5. Carapace 0.6 long. Clypeus height: 0.2. Sternum: 0.3 long; 0.3 wide. Eye measurements: AME 0.1; ALE-PLE: grouped, 0.05 each; PME-PME: separated by 1 PME (0.07 each). Legs: I femur 0.6/ patella 0.21/ tibia 0.4/ metatarsus 0.3/ tarsus 0.28/ total 1.79; II 0.45/ 0.2/ 0.35/ 0.22/ 0.25/ 1.47; III 0.32/ 0.15/ 0.2/ 0.17/ 0.2/ 1.04; IIII 0.4/ 0.17/ 0.3/ 0.2/ 0.2/ 1.27. Palp: cymbium pointed; conductor covering most of the embolus. Embolus large, with rounded embolic opening between the mesal embolic apophysis (Fig. 4 B–E; Coddington 1986: 12). Abdomen: 0.8 long.

Female. Unknown.

Distribution.

Known only from the type locality, a cave in Parauapebas, state of Pará, Brazil (Fig. 16).