Kryptochroma renipalpis (Mello-Leitão, 1929) gen. et comb. nov. Figs 15, 18, 19D Stephanopis renipalpis Mello-Leitão, 1929: 60, figs 143–144. Note Mello-Leitão (1929) also designated a “cotype” (MNHN 17335) of S. renipalpis from Pernambuco; however, the specimen was not found. Diagnosis The male of K. renipalpis is similar to that of K. quinquetuberculata due to their well-developed MS, light clypeus and white macula on dorsum (Fig. 15A–B). However, it can be distinguished from this and other congeneric species by the medially positioned spermatic duct (Figs 15C, E, 19D) and extreme curvature of the RTA, which is thinner than in the other species and smooth at the tip (Figs 15D, F, 19D). Material examined Holotype BRAZIL • ♂; Rio de Janeiro; MNHN 6945. Additional material BRAZIL • 1 ♂; Rio de Janeiro, Angra dos Reis, Enseada das Palmas; 23°08′30″ S, 44°08′26″ W; 2–12 Feb. 1997; M. Ramírez leg.; MCTP 42730. Description Male (MCTP 42730) PROSOMA. Anterior row eye strongly recurved and posterior slightly procurved (Fig. 15A–B); carapace predominantly reddish-brown with clypeus whitish (Fig. 15B); sternum slightly longer than wide, entirely reddish-brown; labium truncated and totally dark-brown; chelicerae reddish-brown with distal lighter spots. LEGS. Anterior legs (I and II) mostly reddish-brown, with yellowish spots on the proximal portion of metatarsi and tarsi; posterior legs (III and IV) with bicolor femora. OPISTHOSOMA. Rough surfaced, dark-yellow with red spiniform projections (Fig. 15A). MEASUREMENTS. Eye diameters and eye interdistances: AME 0.06, ALE 0.09, PME 0.08, PLE 0.08, AME–AME 0.08, AME–ALE 0.06, PME–PME 0.12, PME–PLE 0.04,MOQ length 0.27, MOQ width 0.37; leg formula: 1-2-4-3:leg I – femur 1.91/ patella 21.03/ tibiae 1.29/ metatarsus 1.03/ tarsus 0.67/ total 5.93; II – 1.29/ 0.67/ 0.88/ 0.70/ 0.48/ 4.02; III – 0.85/ 0.45/ 0.64/ 0.41/ 0.32/ 2.67; IV – 0.91/ 0.40/ 0.72/ 0.51/ 0.37/ 2.91. Total body length 4.24; carapace 2.07 length, 1.96 width; opisthosoma length 2.17; clypeus 0.19 height; sternum 0.74 length, 0.67 width; endites 0.38 length, 0.29 width; labium 0.22 length, 0.29 width. Female Unknown. Distribution Brazil (Rio de Janeiro) (Fig. 18).

Published as part of Machado, Miguel, Viecelli, Rafaela, Guzati, Catherine, Grismado, Cristian J. & Teixeira, Renato A., 2021, Kryptochroma: a new genus of bark-dwelling crab spiders (Araneae, Thomisidae), pp. 26-70 in European Journal of Taxonomy 778 on pages 53-55, DOI: 10.5852/ejt.2021.778.1565, http://zenodo.org/record/5673850