Amphidraus simplex, Ruiz, 2017

Ruiz, Gustavo R. S., 2017, Ten new species of Amphidraus Simon, 1900 (Araneae: Salticidae: Euophryini) and three new combinations, Zootaxa 4312 (3), pp. 401-437: 416-418

publication ID

https://doi.org/10.11646/zootaxa.4312.3.1

publication LSID

lsid:zoobank.org:pub:304D1493-B681-4215-B1F9-C1911B70087B

persistent identifier

http://treatment.plazi.org/id/26058799-FF90-FF81-E9AB-FF08FC6CFDE8

treatment provided by

Plazi

scientific name

Amphidraus simplex
status

sp. nov.

Amphidraus simplex   sp. nov.

Figs 13–14 View FIGURE 13 View FIGURE 14

Type material. Holotype: ♂ from Juruti, 02°30'27.4"S, 56°10'39.5"W, Pará, Brazil, 8–13.V.2010, B.V.B. Rodrigues et al. leg. ( MPEG 32685 View Materials ). Paratypes: 1♂ ( IBSP 211842 View Materials ) and 1♀ ( MPEG 32686 View Materials ), both from Juruti, Pará, Brazil, 16–17.XII.2012, A.S. Alves et al. leg. GoogleMaps  

Etymology. Latin adjective, referring to the simple RTA.

Diagnosis. The embolic disc and embolus of A. simplex   sp. nov. are similar to those of A. duckei   , A. santanae   , A. colombianus   and A. nigrigenu   sp. nov.: there are two dPED and the vPED is proximal and projects retrolaterally; also, the embolus is thicker and sickle-shaped. However, A. simplex   sp. nov. can be distinguished from those species by the finger-shaped RvTA ( Figs 14 View FIGURE 14 C, 14D), being slender and sinuous in A. duckei   and A. colombianus   , quadrangular with one tooth in A. santanae   (see Galiano 1967: fig. 4), and rounded with two teeth in A. nigrigenu   sp. nov. ( Fig. 12 View FIGURE 12 D). It also differs from all Amphidraus   species by the presence of stout scales emerging from the proximal portion of the tibia ( Figs 14 View FIGURE 14 B, 14D). The females of A. simplex   sp. nov. ( Fig. 14 View FIGURE 14 F), A. duckei   , A. santanae   ( Fig. 16 View FIGURE 16 I) and A. bifidus   sp. nov. ( Fig. 21 View FIGURE 21 F) have semicircular secondary spermathecae near the copulatory openings. However, A. simplex   sp. nov. differs from all Amphidraus   species in having a single copulatory opening (atrium), whereas the other species have two copulatory openings. In addition, its coupling pocket is located ventrally in the middle portion of the epigynal plate ( Figs 14 View FIGURE 14 E, 14F), whereas A. duckei   and A. santanae   have dorsal pockets on the posterior border of the epigynal plate ( Figs 15 View FIGURE 15 D, 16I –L).

Description. Male holotype ( MPEG 32685). Total length: 2.39. Carapace 1.37 long, 0.95 wide and 0.95 high. Ocular quadrangle 0.57 long. Anterior eye row 1.06 wide, posterior 0.87 wide. Legs: 3412. Length of leg I 2.00 (0.61 + 0.72 + 0.67); II 1.86 (0.57 + 0.68 + 0.61); III 2.66 (0.87 + 0.84 + 0.95); IV 2.63 (0.80 + 0.84 + 0.99). Palp ( Figs 14 View FIGURE 14 A –D): femur with subproximal ventral projection and a slight distal cavity, in which the tegular lobe fits when the palp is flexed ( Fig. 14 View FIGURE 14 D); cymbium with proximal, retrolateral depression, in which the RvTA fits ( Fig. 14 View FIGURE 14 D); tegulum with tegular lobe curved towards prolateral side ( Fig. 14 View FIGURE 14 C); embolic filament longer than straight, sclerotized portion ( Fig. 14 View FIGURE 14 C). Color in alcohol: thoracic area brown and cephalic area black, abdomen dorsally brown and variegated, ventrally pale; legs light brown ( Figs 13 View FIGURE 13 A, 13B).

Female paratype ( MPEG 32686). Total length: 2.66. Carapace 1.41 long, 1.01 wide and 0.76 high. Ocular quadrangle 0.72 long. Anterior eye row 1.06 wide, posterior 0.91 wide. Legs: 4312. Length of leg I 2.19 (0.68 + 0.84 + 0.67); II 2.02 (0.65 + 0.72 + 0.65); III 2.77 (0.91 + 0.95 + 0.91); IV 2.89 (0.91 + 0.93 + 1.05). Color in alcohol: as in male ( Figs 13 View FIGURE 13 C, 13D).

Distribution. Known only from the type locality ( Brazil, Pará) ( Fig. 30 View FIGURE 30 ).

MPEG

Museu Paraense Emilio Goeldi

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Salticidae

Genus

Amphidraus