Kryptochroma quinquetuberculata ( Taczanowski, 1872 ) Machado & Viecelli & Guzati & Grismado & Teixeira, 2021

Machado, Miguel, Viecelli, Rafaela, Guzati, Catherine, Grismado, Cristian J. & Teixeira, Renato A., 2021, Kryptochroma: a new genus of bark-dwelling crab spiders (Araneae, Thomisidae), European Journal of Taxonomy 778, pp. 26-70 : 51-53

Kryptochroma quinquetuberculata ( Taczanowski, 1872) gen. et comb. nov.

Figs 14 , 18, 19C

Thomisus quinquetuberculatus Taczanowski, 1872: 100 .

Stephanopis acanthogastra Mello-Leitão, 1929: 53 , fig. 135. syn. nov.

Stephanopis quinquetuberculata – Keyserling 1880: 171, pl. 3 fig. 94. — Mello-Leitão 1929: 62. Tobias quinquetuberculatus – Simon 1895: 1053.

Notes

According to Keyserling (1880), the description of the species in his work was based on the holotype originally proposed by Taczanowski (1872), from Cayenne ( French Guiana), which is presumably lost. We had access to a specimen from the Natural History Museum of London (BMNH 1890.7.1.3479) that is labeled as “type” ( Fig. 14G–H ); however, it is clearly not the holotype because it was collected after the original description. Since this specimen is strikingly similar to the one represented in the original illustrations (where the author highlighted the diagnostic features of the male palpus: sinuous RTA and the tip-narrowed tegulum) and was found near the original locality ( New Granada, currently corresponding to the Colombian territory), we propose it as the neotype for K. quinquetuberculata comb. nov. ( Fig. 14G–H ).

Diagnosis

The male of K. quinquetuberculata resembles that of K. pentacantha by its stout opisthosomal projections and by the presence of a dorsal white macula on the opisthosoma ( Fig. 14A ). However, it can be recognized by the tegulum in the shape of a water drop, bearing a straight and tip-narrowed embolus instead of a curved termination observed in its closest correlated species ( Figs 14C, E , 19C). Moreover, K. quinquetuberculata has a remarkable RTA which is large at the basis, sharpen abruptly at the tip, and sinuous, pointing towards to the dorsum of the cymbium ( Figs 14D, F , 19C).

Material presumably lost

Holotype FRENCH GUIANA • ♂; Cayenne ; MZPW.

Material examined

Neotype COLOMBIA • ♂; BMNH 1890.7.1.3479 .

Holotype of S. acanthogastra syn. nov. BRAZIL • ♂; Bahia; MNHN 17126 .

Additional material

FRENCH GUIANA • 1 ♂; Maripasoula , Massif du Mitaraka ; 02°17′26″ N, 54°31′18″ W; 2015; Vedel leg.; MCTP 42644 • 1 ♂; Maripasoula , Sommet Tabulaire , Mont Itoupe ; 03°32′13″ N, 53°34′25″ W; 13 Nov. 2014; Vedel and Lalague leg.; MCTP 42645 .

BRAZIL – Pernambuco State • 1 ♂, 1 juv.; Recife, Horto Dois Irmãos; 8°00′35″ S, 34°56′51″ W; 13 Sep. 1999; M. Peres leg.; IBSP 38639 . – Bahia State • 1 ♂; Una, Reserva Biológica de Una ; 15°10′42″ S, 39°06′13″ W; 15–28 Nov. 2000; A.D. Brescovit leg.; IBSP 46738 • 1 ♂; same collection data as for preceding; IBSP 46712 • 1 ♂; same collection data as for preceding; IBSP 46714 • 1 ♂; same collection data as for preceding; IBSP 46724 • 1 ♂; same collection data as for preceding; IBSP 46726 • 1 ♂; same collection data as for preceding; IBSP 46740 • 1 ♂; Reserva Zoobotânica CEPLAC ; 14°46′22″ S, 39°13′13″ W; 8 Dec. 2010; G.H.F. Azevedo and A.J. Santos leg.; UFMG 9484 .

Description

Male (IBSP 46712)

PROSOMA. Anterior eye row strongly recurved, posterior slightly procurved; carapace predominantly dark-brown with discrete MS; clypeus lighter than the rest of carapace with light spots at its lateral margins ( Fig. 14B ). Labium, endites and chelicerae dark-brown.

LEGS. Anterior legs (I and II) dark-brown and posterior femora (III and IV) presenting their proximal half yellow.

OPISTHOSOMA. Predominantly brown with a dorsal white macula at its median region and a light transversal line connecting the anterolateral projections ( Fig. 14A ).

MEASUREMENTS. Eye diameters and eye interdistances: AME 0.06, ALE 0.11, PME 0.09, PLE 0.09, AME–AME 0.06, AME–ALE 0.08, PME–PME 0.16, PME–PLE 0.04, MOQ length 0.32, MOQ width 0.35; leg formula: 1-2-4-3: leg I – femur 1.61/ patella 0.88/ tibiae 1.19/ metatarsus 0.88/ tarsus 0.56/ total 5.12; II – 1.45/ 0.72/ 0.96/ 0.72/ 0.48/ 4.33; III – 0.88/ 0.48/ 0.72/ 0.48/ 0.37/ 2.93; IV – 1.01/ 0.48/ 0.80/ 0.48/ 0.40/ 3.17. Total body length 4.39; carapace 2.12 length, 2.07 width; opisthosoma length 2.22; clypeus 0.24 height; sternum 0.85 length, 0.72 width; endites 0.32 length, 0.25 width; labium 0.16 length, 0.29 width.

Female

Unknown.

Distribution

French Guiana (Cayenne and Maripasoula) and Brazil (Bahia and Pernambuco) ( Fig. 18 ).

Figures

Fig. 14. Male of Kryptochroma quinquetuberculata (Taczanowski, 1872) gen. et comb. nov. A–F. Specimen IBSP 46712. A. Habitus, dorsal view. B. Front. C–F. Left male palp. C, E. Ventral view. D, F. Retrolateral view. G–H. Neotype of K. quinquetuberculata gen. et comb. nov. (BMNH 1890.7.1.3479).

Fig. 18. Distribution records of species of Kryptochroma Machado gen. nov.