Amphidraus boomerang,

Salgado, Alexandre & Ruiz, Gustavo R. S., 2019, Seven new species of Amphidraus Simon, 1900 (Araneae: Salticidae: Euophryini), Zootaxa 4563 (3), pp. 451-481: 454-457

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Amphidraus boomerang

sp. nov.

Amphidraus boomerang  sp. nov.

Figs 7–8View FIGURE 7View FIGURE 8, 14View FIGURE 14

Type material. HolotypeGoogleMaps  : Ƌ from Fazenda Nazareth   GoogleMaps, [4°45'03.4"S; 42°35'14.2"W], José de Freitas, Piauí, Brazil, 31.I.2004, V.O. Costa leg. ( MPEG 9881View Materials).

Etymology. The specific epithet is a noun in apposition and refers to embolic disc, boomerang-shaped ( Figs 7CView FIGURE 7, 8AView FIGURE 8).

Diagnosis. A. boomerang  sp. nov. differs from all Amphidraus  species by having the embolic disc boomerangshaped, due its expanded retrolateral border ( Figs 7CView FIGURE 7, 8AView FIGURE 8). The retrolateral triangular lamella on the embolus shaft of A. boomerang  sp. nov. is also present in A. argentinensis Galiano, 1997  , near the emergence point of the embolic filament (see Galiano 1997: figs 9–10). A. boomerang  sp. nov. can be distinguished from A. argentinensis  by shape of the RvTA, large and with a ventral lobe in A. argentinensis  ( Galiano 1997: fig. 11) and reduced in A. boomerang  sp. nov. ( Fig. 8BView FIGURE 8).

Description. Male holotype (MPEG 9881). Total length: 3.08. Carapace 1.62 long, 1.07 wide and 0.85 high. Ocular quadrangle 0.83 long. Anterior eye row 1.17 wide, posterior 0.98 wide. Legs 4312. Length of leg: I 2.65 (0.82 + 1.01 + 0.82); II 2.49 (0.80 + 0.91 + 0.78); III 3.15 (0.99 + 1.05 + 1.11); IV 3.47 (1.02 + 1.21 + 1.24). Palp ( Figs 7View FIGURE 7 C–F, 8A–D): femur and patella with no modifications; short RvTA with two apical teeth ( Figs 7DView FIGURE 7, 8BView FIGURE 8); straight RTA with the same length of tibia and with membranous external border ( Figs 7D, 7FView FIGURE 7, 8B, 8DView FIGURE 8); cymbium oval, with proximal dorso-prolateral portion prominent ( Figs 7FView FIGURE 7, 8DView FIGURE 8); tegulum with thick and straight lobe ( Figs 7CView FIGURE 7, 8AView FIGURE 8); embolic disc with a process with acute tip (dPED) placed on the median distal portion and projected to prolateral side, with a ventral process (vPED) ventrally projected and with a proximal process (pPED) projected to proximal side, hidden under the tegulum ( Figs 7View FIGURE 7 C–E, 8A, 8C); embolus shaft (e) with tip curved to retrolateral side and with two processes: a triangular lamella placed at the middle of retrolateral border and a rounded basal process ( Figs 7CView FIGURE 7, 8AView FIGURE 8); embolic filament (ef) approximately 1/2 the length of embolus shaft ( Figs 7CView FIGURE 7, 8AView FIGURE 8). Color in alcohol ( Figs 7View FIGURE 7 A–B): cephalic area black; thoracic area brown with light brown longitudinal stripe; abdomen dorsally variegated with light brown and with longitudinal stripe of white setae; ventrally pale; pale legs.

Female. Unknown.

Distribution. Known only from the type locality (state of Piauí) ( Fig. 14View FIGURE 14).