Alpaida tupinamba, Pamplona & Bonaldo & Pantoja, 2025

Alpaida tupinamba sp. nov.

Figs 4A–D View FIGURE 4 , 5 View FIGURE5 , 15 View FIGURE 15

Alpaida guimaraes Levi 1988: 390 View in CoL , figs 23, 24, in part, male paratype (MCN 10287), misidentification by Levi (1988).

Type material. Holotype ♂ from Fazenda Almada, Uruçuca , Bahia, 26.XI.1979, J.S. Santos coll. (former paratype of A. guimaraes, MCN 10287), examined.

Additional material examined. None.

Etymology. The name Tupinamba is a noun in apposition honoring the Tupinambá tribes from the Amazon. The choice highlights the importance of local communities and the area's biodiversity, as well as recognizing the crucial role of these communities in the preservation and understanding of the regional fauna.

Diagnosis. Males of A. tupinamba sp. nov. are similar to those of Alpaida almada Levi, 1988 ( Levi 1988: 481, fig. 639) and Alpaida chickeringi Levi, 1988 ( Levi 1988: 481, fig. 634) judging by the elongated and pointed apical end of the median apophysis ( Figs 4C, D View FIGURE 4 , 5 View FIGURE5 ). Alpaida tupinamba sp. nov. is distinguished from those species by the distal lobe of the terminal apophysis, which is more elongated and projected anteriorly than in A. almada and A. chickeringi , and with a shorter conductor lobe ( Figs 4C, D View FIGURE 4 , 5 View FIGURE5 ).

Description. Male (based on the holotype MCN 10287): carapace longer than wide, pale gray ( Fig. 4A View FIGURE 4 ); chelicerae, maxillae and labium orange ( Fig. 4B View FIGURE 4 ); sternum pale gray, cordiform ( Fig. 4B View FIGURE 4 ). Legs light yellow at the base and brown at the apex and coxae dark brown ( Fig. 4A, B View FIGURE 4 ). Abdomen gray, dorsum with a white anterior transversal spot extended into three longitudinal stripes (a central and two lateral ones), posteriorly with large dark gray spot ( Fig. 4A View FIGURE 4 ); venter mostly dark gray ( Fig. 4B View FIGURE 4 ). Palp ( Figs 4C, D View FIGURE 4 , 5 View FIGURE5 ): tegulum rounded, with a well-developed tegular lobe; median apophysis projected posteriorly beyond the tegulum, and pointed at the apical end; conductor lobe prolaterally curved; conductor broader than long, with a longitudinal median groove; embolus subrectangular, directed posteriorly; terminal apophysis with a wide and flattened base and prolaterally divided into an elongated, finger-like basal prong and distal lobe, the first slightly arched ending in a wider sub-quadrate tip, and the latter projected anteriorly beyond the tegulum, and ending in a rounded tip. Measurements. Total length: 4.1. Carapace: length: 2.0; width: 1.7. Leg I: femur: 2.2; patella + tibia I: 2.4; metatarsus 1.8; tarsus 0.9. Patella + tibia: II 2.1; III 1.1; IV 1,7.

Female: unknown.

Taxonomic notes. The color pattern of the male of A. tupinamba sp. nov. is very distinct from those in all other species of Alpaida known only by females. The abdomen is gray, with an anterior white transverse band that divides it in three longitudinal stripes — one median and two lateral ones — in addition to a large dark spot in the posterior region. These combined features make the species easily distinguishable within the genus.

Distribution. Known only by the type locality ( Fig. 15 View FIGURE 15 ).