Amphidraus manauara, Salgado & Ruiz, 2019

Salgado, Alexandre & Ruiz, Gustavo R. S., 2019, Seven new species of Amphidraus Simon, 1900 (Araneae: Salticidae: Euophryini), Zootaxa 4563 (3), pp. 451-481 : 465-468

Amphidraus manauara sp. nov.

Figs 15–17 , 19 A–B, 19E, 20

Type material. Holotype: ♂ from Fazenda Experimental da UFAM, 02°38'55.8"S, 60°03'09.4"W, Manaus, Amazonas, Brazil, unknown date, E. P. Franken & A.C.K Silva leg. ( MPEG 35025 ). Paratype: 1♀, same data as holotype ( MPEG 35026 ) .

Additional material examined. BRAZIL: Amazonas: 1♀ from Fazenda Experimental da UFAM, 02°38'55.8"S, 60°03'09.4"W, Manaus, unknown date, E.P. Franken & A.C.K Silva leg. ( MPEG 34601 ) .

Etymology. The specific epithet (to be treated as a noun in apposition) means a person who lives in Manaus ( Brazil).

Diagnosis. Among all species of Amphidraus , the male of A. manauara sp. nov. is most similar to that of A. caxiuanan Salgado & Ruiz, 2017 by having the embolic disc with a long, prolaterally projected distal process (dPED) with rounded tip, and a short, ventrally projected ventral process (vPED) ( Figs 15C , 17A , 18B ); also by having the tibial apophyses with similar pattern (RvTA short and rounded and the RTA is curved on its basal portion and points to apex of cymbium; Figs 15D , 17C , 19G ); and by having the cymbium with the proximal, dorso-prolateral portion prominent and one cavity placed on proximal, dorso-retrolateral portion ( Figs 17B , 19D ). However, the male of A. manauara sp. nov. can be distinguished by having the embolus shaft and embolic filament shorter in proportion to embolic disc ( Figs 19A, 19C ), by having shorter proximal, dorso-prolateral projection of cymbium ( Figs 19B, 19D ) and shorter RTA ( Figs 19 E–G). The female of A. caxiuanan is unknown, but among Amphidraus females currently known, A. manaura sp nov. is most similar to A. complexus Zhang & Maddison, 2012 by having short copulatory ducts, and the copulatory openings far apart from the posterior border of the epigyne ( Figs 16D , 17D ); see Zhang & Maddison 2012: figs 5–6). However, the female of A. manauara sp. nov. can be distinguished by having glands associated with the copulatory openings, and longer copulatory ducts ( Figs 16 C–D, 17D).

Description. Male holotype (MPEG 35025). Total length: 2.59. Carapace 1.37 long, 0.90 wide, 0.60 high. Ocular quadrangle 0.67 long. Anterior eye row 0.98 wide, posterior 0.84 wide. Legs 4312. Length of legs: I 2.03 (0.66 + 0.74 + 0.63); II 1.89 (0.60 + 0.67 + 0.62); III 2.29 (0.71 + 0.77 + 0.81); IV 2.61 (0.78 + 0.86 + 0.97). Palp ( Figs 15 C–E, 17A–C, 19A–B, 19E): femur and patella with no modifications; cymbium oval ( Figs 15E , 17B ); tegulum with stout and straight lobe ( Figs 15C , 17A ); embolus shaft (e) with no modifications; embolic filament short, approximately 1/3 the length of embolus shaft ( Fig. 17A ). Color in alcohol ( Figs 15 A–B): cephalic area black; thoracic area brown with pale longitudinal stripe; abdomen dorsally with two longitudinal brown lateral stripes and one longitudinal central pale stripe intersected by smaller pale stripes; ventrally pale; legs pale.

Description. Female paratype (MPEG 35026). Total length: 2.75. Carapace 1.34 long, 0.87 wide, 0.62 high. Ocular quadrangle 0.59 long. Anterior eye row 0.93 wide, posterior 0.85 wide. Legs 4321. Length of legs: I 1.94 (0.62 + 0.73 + 0.59); II 1.84 (0.59 + 0.65 + 0.60); III 2.27 (0.70 + 0.76 + 0.81); IV 2.60 (0.74 + 0.86 + 1.00). Epigyne ( Figs 16 C–D, 17D): epigynal plate with a large, posterior dorsal pocket; copulatory openings separeted by approximately two diameters of the copulatory duct; short copulatory ducts connected to anterior, outer portion of spermathecae; rounded spermathecae with narrower terminal portion; fertilization ducts anteriorly placed and laterally projected; Color in alcohol ( Figs 16 A–B): carapace as in male; abdomen dorsally brown with longitudinal pale stripe intersected by three pale stripes on posterior region; ventrally pale.

Distribution. Known only from the type locality (state of Amazonas, Brazil) ( Fig. 20 ).

Figures

FIGURE 15. Amphidraus manauara sp. nov. A–B male (A dorsal, B ventral); C–E left male palp (C ventral; D retrolateral; E dorsal). Abbreviations: dPED, distal process on embolic disc; e, embolus shaft; ef, embolic filament; RTA, retrolateral tibial apophysis; RvTA, retroventral tibial apophysis; TL, tegular lobe; vPED, ventral process on embolic disc.

FIGURE 16. Amphidraus manauara sp. nov. A–B female (A dorsal, B ventral); C–D epigyne/vulva (C ventral; D ventral, cleared). Abbreviations: co, copulatory opening; fd, fertilization duct; po, coupling pocket; S, spermatheca.

FIGURE 17. Amphidraus manauara sp. nov. A–C left male palp (A ventral; B dorsal; C retrolateral); D epigyne/vulva, cleared, ventral. Abbreviations: cc, cymbial conductor; cd, copulatory duct; co, copulatory opening; Cy, cymbium; dPED, distal process on embolic disc; e, embolus shaft; ed, embolic disc; ef, embolic filament; fd, fertilization duct; gl, gland; po, coupling pocket; RTA, retrolateral tibial apophysis; RvTA, retroventral tibial apophysis; S, spermatheca; T, tegulum; TL, tegular lobe; vPED, ventral process on embolic disc.

FIGURE 18. Morphological variation in Amphidraus caxiuanan Salgado & Ruiz, 2017. A–D holotype from Melgaço, Pará (A male, dorsal; B left palp, ventral; C retrolateral; D dorsal). E–H specimen from Oriximiná, Pará (E male, dorsal; F left palp, ventral; G retrolateral; H dorsal). Abbreviations: cc, cymbial conductor; dPED, distal process on embolic disc; e, embolus shaft; ef, embolic filament; RTA, retrolateral tibial apophysis; RvTA, retroventral tibial apophysis; TL, tegular lobe; vPED, ventral process on embolic disc. Black arrow in D shows dorso-prolateral, proximal cymbial projection.

FIGURE 19. Comparison of male palpal structures in Amphidraus spp. A–B, E left male palp of A. manauara sp. nov. (A ventral; B cymbium, dorsal; E retrolateral, bulb removed). C–D, F–G left male palp of A. caxiuanan Salgado & Ruiz, 2017 (C holotype from Melgaço, ventral; D same, cymbium, dorsal; G same, retrolateral, bulb removed; F specimen from Oriximiná, retrolateral, bulb removed. Abbreviations: Cy, cymbium; RTA, retrolateral tibial apophysis; RvTA, retroventral tibial apophysis; T, tegulum.

FIGURE 20. Map of northern Brazil showing records of Amphidraus caxiuanan and A. manauara. White lines represent the borders of Brazilian states. Map modified from Google Earth ®. Blue line between Manaus and Melgaço represents the Amazon River.