Sparianthis picta ( Simon, 1887 ) Rheims, 2020

Rheims, Cristina A., 2020, Revision of the spider genus Sparianthis Simon, 1880 (Araneae, Sparassidae Sparianthinae), Zootaxa 4890 (2), pp. 151-191 : 183-184

Sparianthis picta ( Simon, 1887) comb. nov.

Figs 117–127 , 143

Pseudosparianthis picta Simon, 1887: 473

(Syntypes 1³, 1♀, Peru, Loreto, Pebas [-3.3201, -71.8609] and Brazil, Amazonas , S ã o Paulo de Olivença [-3.4740, -68.9614], Mathan leg., MNHN 7213 , examined). World Spider Catalog 2020.

Additional material examined. PERU: Loreto: 1³, San Juan Bautista, Carretera Iquitos-Nautla , OTAE (-4.0008, -73.4409), 10 April 2013 , C.A. Rheims & R. P. Indicatti leg. ( IBSP 165063 ) .

Diagnosis. Males of S. picta resemble those S. juruti sp. nov. by the palpal tibia with strong medial-retrolateral spine ( Figs 104 , 124 ). They are distinguished from the latter species by the spine at least three times longer than wide (two times longer than wide in S. juruti sp. nov.) ( Fig. 124 ). They are further distinguished from all other spe-cies of the genus by short embolus with wide, ventral, hyaline membrane ( Fig. 123 ). Females resemble those of S. granadensis by the epigyne with median septum light bulb-shaped and anterior atrium wider than long ( Figs 70 , 125 ). They are distinguished from the latter species by oval shape of the anterior atrium (rectangular in S. granadensis ) ( Fig. 125 ) and presence of three pairs of ventral spines on leg metatarsi I–II (two pairs in S. granadensis ).

Redescription. Male (IBSP 165053): Prosoma brown, suffused with dark marbled pattern laterally. Chelicerae brown. Legs and pedipalps slightly lighter than prosoma. Labium brown, distally pale yellow. Endites pale yellow. Sternum pale yellow with slightly darker margins. Opisthosoma brownish cream colored; dorsally with scattered elongated marks laterally, on anterior half, few spots around cardiac mark and irregular marks scattered on posterior half; ventrally with few spots close to spinnerets and V-shaped lines of muscle sigilla extending along most of opisthosoma length ( Figs 117–118 ). Total length: 6.7. Prosoma: 3.0 long, 2.6 wide. Opisthosoma: 3.6 long, 1.7 wide. Eyes: diameters: 0.26, 0.17, 0.13, 0.19; interdistances: 0.17, 0.04, 0.34, 0.20, 0.13, 0.05. Legs (2143): I: 11.1 (3.2, 1.4, 2.9, 2.9, 0.7); II: 11.5 (3.3, 1.5, 3.0, 3.0, 0.7); III: 9.2 (2.8, 1.1, 2.3, 2.4, 0.6); IV: 10.9 (3.1, 1.1, 2.6, 3.1, 1.2). Spination follows the generic pattern except metatarsi I–II: v2-2-2. Metatarsus III with single ventral distal spine; metatarsus IV with ventral distal preening comb. Palp: tibia with prolateral spines long; vRTA reduced to small bump (best seen in retrolateral view); mRTA triangular; tegulum retrobasally indented, without retro-proximal protrusion, with hyaline lamina between TBE and TBC; TBC wide, keel-like, protruding retrolaterally; TBE squared, with apical projection widened and twisted ( Figs 119–124 ).

Redescription. Female (MNHN, syntype): Coloration pattern as in male, mostly darker. Total length: 7.7. Prosoma: 3.1 long, 2.6 wide. Opisthosoma: 4.2 long, 2.2 wide. Eyes: diameters: 0.20, 0.18, 0.12, 0.18; interdistances: 0.16, 0.14, 0.32, 0.22, 0.16, 0.08. Legs (2143): I: 10.2 (2.8, 1.5, 2.8, 2.5, 0.6); II: 10.3 (3.0, 1.5, 2.5, 2.6, 0.7); III: 8.2 (2.5, 1.2, 1.8, 2.1, 0.6); IV: 9.4 (2.6, 1.1, 2.2, 2.7, 0.8).Spination follows the generic pattern except tibiae I–II: v2-2- 2-2; tibia III: d0-0-1; metatarsi I–II: p1-0-0; v2-2-2. Metatarsus III–IV with ventral distal preening combs. Epigyne: epigynal field rectangular, slightly longer than wide; anterior atrium oval ( Fig. 125 ). Vulva: internal ducts slender, half spermathecae width, with first turn laterad; glandular projection arising from duct close to copulatory opening; spermathecae rounded ( Figs 126–127 ).

Variation. Males (n=2): total length: 6.7–7.0; prosoma length: 3.0–3.1; femur I length 3.1–3.2.

Distribution. Known from northeastern Peru (Loreto) and northwestern Brazil (Amazonas) ( Fig. 143 ).

Figures

FIGURES 117–121. Sparianthis picta (Simon), male (IBSP 165053). 117–118 habitus (117 dorsal, 118 ventral); 119–121 left palp (119 prolateral, 120 ventral, 121 retrolateral). Scale lines: 117–118: 2 mm; 119–121: 1 mm.

FIGURES 122–127. Sparianthis picta (Simon). 122–124 male (IBSP 165053), left palp (122 prolateral, 123 ventral, 124 retrolateral); 125–127 female, syntype (MNHN 7213) (125 epigyne, 126 vulva, 127 schematic course of internal duct system). Scale lines: 1 mm. af = anterior furrow; ap = apical projection; dRTA = dorsal branch of RTA; E = embolus; lf = lateral furrow; mRTA = medial branch of RTA; TBC = tegular projection at conductor base; TBE = tegular projection at embolus base; vRTA = ventral branch of RTA.

FIGURES 143–144. Distribution maps for Sparianthis spp. 143 S. beebei sp nov., S. caracarai sp. nov., S. granadensis (Keyserling), S. juruti sp. nov., S. magalopalpa (Caporiacco) and S. picta (Simon); 144 S. boraris sp. nov., S. chickeringi (Gertsch), S. crulsi (Mello-Leitão), S. humaita sp. nov., S. juazeiro sp. nov. and S. ravida (Simon).

FIGURES 102–108. Sparianthis juruti sp. nov. 102–104 male, paratype (MPEG 30648), left palp (102 prolateral, 103 ventral, 104 retrolateral); 105 male (MPEG 30642) detail of embolus, retrolateral; 106–108 female, paratype (MPEG 30736) (106 epigyne, 107 vulva, 108 schematic course of internal duct structure). Scale lines: 1 mm. af = anterior furrow; ap = apical projection; dRTA = dorsal branch of RTA; lf = lateral furrow; mRTA = medial branch of RTA; sp = subdistal projection of embolus; TBC = tegular projection at base of conductor; TBE = tegular projection at embolus base; vRTA = ventral branch of RTA.

FIGURES 69–70. Sparianthis granadensis (Keyserling), subadult female (NHM 90.7.1.3164) (69 epigyne, 70 schematic outline of external structure). AA = anterior atrium; af = anterior furrow; lf = lateral furrow; MS = median septum.