Meri rivai, Rheims & Jäger, 2022

Rheims, Cristina A. & Jäger, Peter, 2022, Revalidation of the genus Sadala Simon, 1880 with the description of a new genus of Neotropical huntsman spiders (Araneae, Sparassidae), Zootaxa 5135 (1), pp. 1-80 : 61-62

Meri rivai spec. nov.

Figs 242–244 , 248–249 , 319

Type material. Holotype: BRAZIL: Mato Grosso: ♀, Alta Floresta [‑9.8760, ‑56.0860], 8 August–20 September 2009, J.S. Oliveira leg. ( IBSP 246428 ).

Etymology. The specific name refers to the businessman Ariosto da Riva, who in the early 70’s acquired the region currently known as Alta Floresta, to start a new settlement project; genitive case.

Diagnosis. Females of M. rivai sp. nov. are distinguished from the remaining congeners by the epigyne with MS Erlenmeyer-shaped ( Fig. 242 ) and vulva with SP elongate with smooth margins ( Figs 243 ). Males are unknown.

Description. Female (holotype): Total length 17.6. Prosoma 6.8 long, 6.8 wide. Opisthosoma 10.7 long, 7.5 wide. Eyes: diameters: 0.46, 0.41, 0.30, 0.36; interdistances: 0.47, 0.38, 0.84, 0.81, 0.43, 0.28. Legs: I: 27.0 (7.5, 3.3, 6.8, 7.3, 2.1); 28.6 (8.6, 3.5, 7.0, 7.5, 2.0); III: 21.0 (6.6, 2.9, 5.0, 4.9, 1.6); IV: 22.8 (7.2, 2.6, 5.4, 5.8, 1.8). Spination follows the generic pattern. Epigyne: EF wider than long; MAB elongate; MS longer than wide, widest posteriorly; HP triangular, 1.5 times longer than wide, opening at posterior margin of MS; LL touching posteriorly ( Figs 242 , 248 ). Vulva: internal ducts with FW antero laterad; GP slightly longer than wide, mediad, arising from ducts at first turn; FD anteriad to antero-laterad ( Figs 243–244 , 249 ).

Male: unknown.

Distribution. Only known from the type locality ( Fig. 319 ).

Figures

FIGURES 238–244. 238–241 Meri quinari spec. nov., male (UFMG 10165), left palp (238 prolateral, 239 ventral, 240 retrolateral, 241 detail of embolus); 242–244 Meri rivai spec. nov., female (IBSP 246428) (242 epigyne, 243 vulva, 244 schematic course of internal duct system). db—dorsal branch of RTA; E—embolus; EP—epigynal pocket; ft—first turn f duct system; FD—fertilization duct; GP—glandular projection; LL—lateral lobe; MAB—muscle attachment bands; MS—median septum; PTA—prolateral tibial apophysis; RTA—retrolateral tibial apophysis; SdP—subdistal projection; SP—spermathecae. Scale lines: 1 mm.

FIGURES 245–249. 245–247 Meri quinari spec. nov., male (UFMG 10165, holotype), left palp (245 prolateral, 246 ventral, 247 retrolateral); 248–249 Meri rivai spec. nov., female (IBSP 246428, holotype) (248 epigyne, 249 vulva). Scale lines 1 mm.

FIGURES 319–320. 319 distribution map for species of Meri gen. nov. (M. vanini spec. nov., M. munduruku spec. nov., M. aparia spec. nov., M. quinari spec. nov., M. rivai spec. nov.) 320 distribution map for all species of the genera Sadala Simon and Meri gen. nov.