Uaica mapia, Rheims, 2025

Rheims, Cristina A., 2025, Uaica gen. nov., a new genus of huntsman spiders from the Brazilian Amazonia (Araneae: Sparassidae), European Journal of Taxonomy 989, pp. 24-49 : 39-41

Uaica mapia gen. et sp. nov.

urn:lsid:zoobank.org:act:BB6EB59D-C1C9-4790-A0CF-9C794310B87D

Figs 10–11 , 15

Diagnosis

Males of Uaica mapia gen. et sp. nov. resemble those of U. uatuma gen. et sp. nov. ( Figs 12C–E , 14AC ) by the E slender, longer than C and arising from tegulum at 8:30 o’clock position ( Figs 10D , 11B ), but are distinguished by the RTA S-shaped in retrolateral view ( Figs 10E , 11C ) (straight and conical in U. uatuma ) and by the E arising straight from the tegulum ( Figs 10D , 11B ) (arising from an indentation of the tegulum in U. uatuma ). Females are unknown.

Etymology

The specific epithet refers to the type locality, the Mapiá River; noun in apposition.

Type material

Holotype BRAZIL – Amazonas State • ♂; Borba; Rio Mapiá ; [4.4500º S, 59.3333º W]; 22 Apr. 1996; equipe IBSP/SMNK leg.; IBSP 8817 .

Paratypes BRAZIL – Amazonas State • 1 ♂; same data as for holotype; IBSP 60015 • 1 ♂; Coari; Trocaris; Comunidade Trocaris ; 3.8980º S, 62.8670º W; 25 Sep. 2003, F. Rego et al. leg.; IBSP 270063 • 1 ♂; same data as for preceding; 3.8940º S, 62.8850º W; IBSP 270044 .

Other material examined

BRAZIL • 3 juvs; same data as for holotype; IBSP 8817 .

Description

Male (holotype)

COLOR. Prosoma pale brownish orange slightly darker along thoracic striae; fovea dark brown; eye borders black. Chelicerae, legs and palps slightly lighter than prosoma. Labium pale brown, distally pale orange. Endites pale orange. Sternum pale yellow with pale brown margins. Opisthosoma brownish gray; dorsally with whitish marbled irregular marks around cardiac mark and posteriorly close to spinnerets; ventrally with wide gray band with two parallel lines of muscle impressions. Spinnerets cream colored ( Fig. 10A–B ).

MEASUREMENTS. Total length 6.4. Prosoma: 2.7 long, 2.6 wide. Opisthosoma: 3.5 long, 1.6 wide. Eyes: diameters 0.24, 0.20, 0.16, 0.18; interdistances 0.12, 0.06, 0.30, 0.20, 0.12, 0.10. Legs (2143): I: 21.6 (5.7, 1.7, 6.3, 6.3, 1.6); II: 25.8 (6.8, 1.7, 7.7, 7.5, 2.1); III: 14.7 (4.2, 1.3, 4.1, 4.0, 1.1); IV: 18.0 (5.0, 1.3, 4.9, 5.4, 1.4).

PALP. RTA almost 4 × as long as wide; sp running retrolaterally with slight medial indentation; C slightly over 4 × as long as wide, same width throughout; E tapering towards tip, longer than C ( Figs 10C–E , 11 ).

Female

Unknown.

Variation

Four males: total length 6.4−7.3; prosoma length 2.7−3.4; femur I length 5.7−6.2.

Distribution

Known from the northeastern state of Amazonas ( Fig. 15 ).

Figures

Fig. 10. Uaica mapia gen. et sp. nov., ♂, holotype (IBSP 8817). A. Habitus, dorsal view. B. Habitus, ventral view. C. Left palp, prolateral view. D. Left palp, ventral view. E. Left palp, retrolateral view. Scale bars: A–B = 2 mm; C–E = 0.5 mm.

Fig. 11. Uaica mapia gen. et spec. nov., ♂, holotype (IBSP 8817). A. Left palp, prolateral view. B. Left palp, ventral view. C. Left palp, retrolateral view. Abbreviations: C = conductor; E = embolus; sp = spermophore; ST = subtegulum; RTA = retrolateral tibial apophysis. Scale bars: 0.5 mm.

Fig. 15. Distribution map for species of the genus Uaica gen. nov. (Brazil).

Fig. 12. Uaica uatuma gen. et sp. nov., ♂, holotype (IBSP 7372). A. Habitus, dorsal view. B. Habitus, ventral view. C. Left palp, prolateral view. D. Left palp, ventral view. E. Left palp retrolateral view. Scale bars: A–B = 2 mm; C–E = 0.5 mm.

Fig. 14. Uaica uatuma gen. et sp. nov. A–C. ♂, holotype (IBSP 7372). D–F. ♀, paratype (IBSP 7346). A. Left palp, prolateral view.B. Left palp, ventral view.C. Left palp, retrolateral view.D. Epigyne, ventral view. E. Vulva, dorsal view. F. Schematic course of IDS. Abbreviations: C = conductor; E = embolus; EP = epigynal pocket; FD = fertilization duct; fw = first winding of IDS; GP = glandular projection; LL = lateral lobe; MS = median septum; RTA = retrolateral tibial apophysis; sp = spermophore; ST = subtegulum. Scale bars = 0.5 mm.