Amphidraus bifidus, 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 : 421-427

publication ID

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

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.6044771

persistent identifier

https://treatment.plazi.org/id/26058799-FF8B-FF8A-E9AB-FAA7FBA8FE00

treatment provided by

Plazi

scientific name

Amphidraus bifidus
status

sp. nov.

Amphidraus bifidus sp. nov.

Figs 19–21 View FIGURE 19 View FIGURE 20 View FIGURE 21

Type material. Holotype: ♂ from Reserva Ducke [03°00'13.0"S, 59°55'07.5"W], Manaus, Amazonas, Brazil, 20.I.1992, H. Hofer & T. Gasnier leg. ( INPA 2840 View Materials ) GoogleMaps . Paratypes: 1♂, same data as holotype ( MPEG 32756 View Materials ) GoogleMaps ; 1♀ from Reserva Ducke , Manaus, Amazonas, Brazil, 03°00'13.0"S, 59°55'07.5"W, 23.IX.1991, H. Hofer & T. Gasnier leg. ( INPA 2841 View Materials ) GoogleMaps .

Additional material examined. BRAZIL: Amazonas: Manaus, Reserva Ducke , 03°00'13.0"S, 59°55'07.5"W: 6♂, 1♀, 1991–1997, H. Hofer & T. Gasnier leg. ( INPA 2834–2839, 2842 ). GoogleMaps

Etymology. Latin adjective referring to the bifid distal process on the embolic disc at the base of the embolus.

Diagnosis. The male palp of A. bifidus sp. nov. is similar to that of A. bochica , A. guatavita , A. pae , A. quimbaya , A. zipa and A. janauari sp. nov., with only two short dPED (no vPED; Fig. 21 View FIGURE 21 C). Among these, A. bifidus sp. nov. ( Fig. 21 View FIGURE 21 D) seems closer to A. guatavita (see Galvis 2017: fig. 5C) and A. janauari sp. nov. ( Fig. 18 View FIGURE 18 D) by having similar RTA and RvTA. However, the projection on the basal portion of the embolus is bifid in A. bifidus sp. nov. ( Fig. 21 View FIGURE 21 C), rounded in A. guatavita (see Galvis 2017: fig. 5A) and absent in A. janauari sp. nov. ( Fig. 18 View FIGURE 18 C). The females of A. bifidus sp. nov. ( Fig. 21 View FIGURE 21 F) are superficially similar to those of A. sie (see Galvis 2017: figs 9C–D) and A. draconicaudatus sp. nov. ( Fig. 24 View FIGURE 24 F) in having a compact, pear-shaped mass of ducts and spermathecae, but can be distinguished by having secondary spermathecae (absent in both A. sie and A. draconicaudatus sp. nov.).

Description. Male holotype ( INPA 2840). Total length: 2.39. Carapace 1.12 long, 0.72 wide and 0.46 high. Ocular quadrangle 0.59 long. Anterior eye row 0.76 wide, posterior 0.65 wide. Legs: 4312. Length of leg I 1.71 (0.57 + 0.61 + 0.53); II 1.67 (0.61 + 0.53 + 0.53); III 2.12 (0.65 + 0.80 + 0.67); IV 2.13 (0.65 + 0.76 + 0.72). Palp ( Figs 20 View FIGURE 20 A–D, 21A–D): tibia with RvTA elongate and ventrally projected ( Figs 21 View FIGURE 21 C, 21D), RTA medium-sized and acute ( Figs 21 View FIGURE 21 C, 21D) and with small dorsal tubercle ( Fig. 21 View FIGURE 21 B); cymbium with large cymbial conductor ( Figs 20 View FIGURE 20 A, 20B, 21C); embolic filament longer than straight, sclerotized portion ( Fig. 21 View FIGURE 21 C). Color in alcohol: thoracic area dark brown and cephalic area black; abdomen dorsally brown and variegated; ventrally pale, with brown central area; legs brown ( Figs 19 View FIGURE 19 A, 19B).

Female paratype ( INPA 2841). Total length: unknown (abdomen partially lost). Carapace 1.21 long, 0.78 wide and 0.45 high. Ocular quadrangle 0.55 long. Anterior eye row 0.76 wide, posterior 0.64 wide. Legs: 4312. Length of leg I 1.62 (0.52 + 0.62 + 0.48); II 1.55 (0.50 + 0.55 + 0.50); III 1.99 (0.57 + 0.71 + 0.71); IV 2.04 (0.57 + 0.76 + 0.71). Epigyne ( Figs 21 View FIGURE 21 E–F): epigynal plate with depressions on lateral regions; secondary spermatheca circular, close to copulatory openings; coupling pocket narrow, medially placed on dorsum of plate’s border. Color in alcohol: as in male ( Figs 19 View FIGURE 19 C, 19D).

Distribution. Known only from the type locality ( Brazil, Amazonas) ( Fig. 31 View FIGURE 31 ).

INPA

Instituto Nacional de Pesquisas da Amazonia

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Salticidae

Genus

Amphidraus