Sparianthina boyaca, Rheims, 2021

Rheims, Cristina A., 2021, The Neotropical genera Guadana Rheims, 2010 and Sparianthina Banks, 1929 (Araneae: Sparassidae: Heteropodinae), Zootaxa 5061 (3), pp. 401-431 : 422-426

Sparianthina boyaca sp. n.

Figs 83−85

Type material: Holotype: ♀ from COLOMBIA: Boyacá: [4.6776, -74.1485], between Alto Belen and San Jose, 23 September 1985, J. Sturm leg. ( MCZ 46472).

Etymology. The specific name refers to the type locality; noun in apposition.

Diagnosis. Females of S. boyaca sp. n. resemble those of S. gaita , S. parang and S selenopoides by the presence of an anterior, transversal furrow on the epigyne ( Figs 83 , 112, 114, 116 ). They are distinguished from S. gaita by the presence of an anterior atrium bearing the CO (absent in the latter species) and from S. parang and S. selenopoides by the lateral lobes completely separated by the MS ( Fig. 83 ) (touching each other posteriorly in S. parang and medially in S. selenopoides ).

Description. Female (holotype): Prosoma brownish orange with dark brown margins and brown marks along thoracic striae, lateral margins of cephalic region and extending posteriorly from between PME; fovea brown; eye borders black. Chelicerae and palps brownish orange. Legs brownish orange with large pale brown spots at the base of spines. Labium pale brownish orange, distally cream colored. Endites pale yellowish cream, distally cream colored. Sternum pale yellow with pale orange margins. Opisthosoma cream colored with no distinctive pattern; dorsally with two pairs of round brown muscle impressions; ventrally with two slightly curved lines of muscle impressions. Spinnerets yellowish-cream colored. Total length 10.9. Prosoma: 3.8 long, 3.5 wide. Opisthosoma: 6.8 long, 5.1 wide. Eyes: diameters: 0.20, 0.26, 0.20, 0.26; interdistances: 0.10, 0.06, 0.30, 0.28, 0.22, 0.20. Legs (2143): I: 13.7 (3.8, 1.8, 3.6, 3.2, 1.3); II: 14.8 (4.4, 1.8, 3.9, 3.4, 1.3); III: 12.0 (3.7, 1.4, 3.0, 2.8, 1.1); IV: 13.5 (4.0, 1.4, 3.3, 3.5, 1.3). Epigyne: epigynal field longer than wide; lateral lobes running parallel and diverging posteriorly; anterior atrium oval, wider than long ( Fig. 83 ). Vulva: internal ducts strongly convoluted; glandular projection small, rounded, close to CO; SP elongated, curved anteriorly; FD long, curved, antero-laterad ( Figs 84−85 ).

Male. Unknown.

Distribution. Only known from the type locality in Colombia ( Fig. 117 ).

Figures

FIGURES 83−88. 83−85 Sparianthina boyaca sp. n., female (MCZ 46472) (83 epigyne ventral, 84 vulva dorsal, 85 schematic course of internal duct system). 86−88 S. soca sp. n., male (MZSP 18829), left palp (86 prolateral, 87 ventral, 88 retrolateral). Scale lines: 1 mm. AA—anterior atrium; bp—basal projection of the embolus; C—conductor; dRTA—dorsal branch of RTA; DTA—dorsal tegular apophysis; E—embolus; FD—fertilization duct; GP—glandular projection; LL—lateral lobe; MS—me- dian septum; SP—spermathecae; tp—tegular projection; VTA—ventral tibial apophysis.

FIGURES 112−116. Female, epigyne. 112 Sparianthina gaita, 113 Sparianthina milleri, 114 Sparianthina parang, 115 Sparianthina pumilla, 116 Sparianthina selenopoides. Scale lines: 1 mm. AA—anterior atrium. Illustrations 113, 115, 116 modified from Jäger et al. 2009; 112, 114 from Rheims 2011 (internal structures visualized by transparency are omitted).

FIGURES 117−118. Distribution maps for Sparianthina spp. 117 (Sparianthina adisi, Sparianthina boyaca sp. n., Sparianthina gaita, Sparianthina milleri, Sparianthina parang); 118 (Sparianthina deltshevi, Sparianthina pumilla, Sparianthina saaristoi, Sparianthina selenopoides, Sparianthina soca sp. n.).