Sparianthis juazeiro sp. nov.

Figs 86–92, 144

Type material. Holotype: ♀ from Brazil, Acre, Parque Nacional da Serra do Divisor, Juazeiro [-7.5500, -73.2667], 23 November 1996, R. S. Vieira leg. (IBSP 8991).

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

Diagnosis. Females of S. juazeiro sp. nov. resemble those of S. beebei sp. nov. by the epigyne with lateral furrows reaching anterior furrow and lateral lobes smooth (Figs 14, 90). They are distinguished from the latter species by median septum hour glass-shaped, constricted at middle, and internal ducts with first turn mediad (median septum beer glass-shaped, constricted at posterior fourth, and first turn anteriad in S. beebei sp. nov.) (Figs 90–92).

Description. Female (holotype): Prosoma and chelicerae brown; fovea darker brown; eye borders black. Labium and endites pale brown, distally yellowish brown. Sternum yellowish brown with brown margins. Opisthosoma pale brownish gray; dorsally with irregular marks laterally, small irregular marks around cardiac mark, one median chevron and three median triangles down posterior half; ventrally with V-shaped lines of muscle sigilla on anterior half of opisthosoma (Figs 86–87). Total length 8.4. Prosoma: 3.9 long, 3.2 wide. Opisthosoma: 4.3 long, 2.6 wide. Eyes: diameters: 0.25, 0.22, 0.15, 0.21; interdistances: 0.23, 0.14, 0.44, 0.27, 0.15, 0.04. Legs (1423): I: 10.9 (3.2, 1.8, 2.7, 2.5, 0.7); II: 10.4 (3.3, 1.7, 2.5, 2.3, 0.6); III: 8.1 (2.4, 1.3, 1.9, 1.9, 0.6); IV: 10.6 (3.1, 1.2, 2.4, 3.0, 0.9). Spination follows the generic pattern. Metatarsus III–IV with ventral distal preening combs. Epigyne: epigynal field squared, as long as wide; anterior furrow straight (Figs 88, 90). Vulva: internal ducts slightly wider than half spermathecae width; glandular projection arising from duct at first turn; spermathecae oval (Figs 89, 91–92).

Male. Unknown.

Distribution. Only known from the type locality in northwestern state of Acre, Brazil (Fig. 144).