Gaucha cabriola

Carvalho, Leonardo S. & Botero-Trujillo, Ricardo, 2019, On the sun-spiders of the ibirapemussu species-group of the genus Gaucha Mello-Leitão, 1924 (Solifugae, Mummuciidae), with description of a new species, Zootaxa 4700 (2), pp. 289-298: 292-295

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Gaucha cabriola

new species

Gaucha cabriola  , new species

Figs. 1–17View FIGURES 1–4View FIGURES 5–8View FIGURES 9–14View FIGURES 15–16View FIGURE 17; Tab. 1

Type material. Holotype: male from BRAZIL: Pernambuco: Itacuruba (near Riacho Itacuruba, 8°47’14.8”S 38°41’53.7”W), 2014, S.C. Sousa leg. (CHNUFPI 2519)GoogleMaps  . Paratypes: same data of holotype, 1 ♂ (CHNUFPI 2503)GoogleMaps  , 1 ♂, 1 ♀ (CHNUFPI 2510)GoogleMaps  , 1 ♂ (CHNUFPI 2604), 1 ♂ ( UFMG 23063View Materials)  .

Aditional material examined. BRAZIL: Piauí: Jaicós (7°16’22.35”S 41°15’34.8”W), XII.2013 – II.2014, T. Jiménez-Pinheiro et al. leg., 1 juvenile (CHNUFPI 2471), 2 ♀ (CHNUFPI 2472), 1 ♂ (CHNUFPI 2473), 1 ♀ (CHNUFPI 2474), 1 ♂ (CHNUFPI 2475), 1 ♂ (CHNUFPI 2476), 3 juveniles (CHNUFPI 2477), and 1 ♀ (CHNUF- PI 2478)GoogleMaps  .

Etymology. The specific epithet is a noun in apposition, inspired in a folkloric legend from Portugal, brought by the XIX century to the States of Pernambuco and Piauí, where the new species is known from. Hearsay tell that, according to the legend the ‘Cabriola’ goat throws fire and smoke through her eyes, nose and mouth at anyone wandering deserted streets on Friday nights. Also, it enters the houses through the roof or door, looking for spoiled and mischievous boys to become its meal. So luckily, there is no material evidence of its existence, and it only lives in the local folklore and in this solifuge species name.

Diagnosis. Gaucha cabriola  sp. nov. belongs to the ibirapemussu  species-group as this was defined by Botero- Trujillo et al. (2017: 29). Males of the new species can be distinguished from all other described Gaucha  species by having the MM and MSM teeth very small and similar in size to each other ( Figs. 6View FIGURES 5–8, 10View FIGURES 9–14, 15–16View FIGURES 15–16). Additionally, within the ibirapemussu  species-group, males of G. cabriola  sp. nov. also differ from males of G. avexada  by the practically smooth flagellum with diminute spicules ( Figs. 7View FIGURES 5–8, 12View FIGURES 9–14); from males of G. eremolembra  by the shape of the fixed finger mucron, more robust and with the apex curved ventrally in the new species ( Figs. 8View FIGURES 5–8, 10View FIGURES 9–14, 15–16View FIGURES 15–16); from males of G. mauryi  by having the FM and FD teeth not so exceptionally elongated, and the larger MM tooth; and from males of G. ibirapemussu  by having the fixed and movable finger mucra comparatively longer, straighter and thinner ( Figs. 8View FIGURES 5–8, 10View FIGURES 9–14, 15–16View FIGURES 15–16), as well as by the shape of the flagellum which is less globose in the new species ( Figs. 7View FIGURES 5–8, 12View FIGURES 9–14).

Description. Male holotype (CHNUFPI 2519): Measurements in Table 1. Color: On 80% ethanol-preserved specimens. Propeltidium base color yellow, with whitish patches posteriorly without well-defined borders; ocular tubercle yellow, dark around the eyes ( Figs. 1–2View FIGURES 1–4). Chelicerae with manus yellow with some whitish areas; distal region of the fingers reddish ( Figs. 2View FIGURES 1–4, 9View FIGURES 9–14). Meso-, metapeltidium, and dorsal surface of opisthosoma with a three-darkband design typical of the family: tergites with median, longitudinal brown band, and paired, thinner lateral whitish bands ( Fig. 1View FIGURES 1–4); lateral pleural membranes with sub-dorsal black and sub-ventral white bands becoming difuse towards posterior segments ( Fig. 3View FIGURES 1–4); white band of opisthosomal pleural membrane with black marks surrounding the insertion socket of most setae, and inter-segmental transversal vertices yellow ( Fig. 3View FIGURES 1–4); sternites base color whitish yellow, with lateral margins conspicuously darkened, but three/four posteriormost sternites and preanal sternite with faded color ( Fig. 3View FIGURES 1–4); anal plate with faded dark color ventrally, and dorsally with whitish regions. Ventral aspect of prosoma uniformly yellow; sternum lighter than coxae. Pedipalps yellowish, with telotarsus tip darker than the rest of pedipalp. Legs dark yellow, darker at tibia, basitarsus and telotarsus ( Fig. 1View FIGURES 1–4). Malleoli predominantly whitish. Chelicera: Fixed finger all three primary teeth (FP, FM and FD) and one secondary FSM tooth ( Figs. 8View FIGURES 5–8, 10View FIGURES 9–14, 15–16View FIGURES 15–16); FM and FD columnar ( Figs. 8View FIGURES 5–8, 15View FIGURES 15–16); FM and FD longer than other teeth in the finger, FM similar in size to FD or only slightly larger, such that FM≈FD>FP ( Figs. 10View FIGURES 9–14, 16View FIGURES 15–16). Fixed finger FSD secondary tooth absent ( Figs. 10View FIGURES 9–14, 15–16View FIGURES 15–16). Fixed finger prodorsal carina straight along most of its length; mucron long and predominantly straight, not markedly thin, and with the apex (FT tooth) slightly curved towards the venter. Movable finger MP tooth pronounced, markedly higher than MSM and MM ( Figs. 8–11View FIGURES 5–8View FIGURES 9–14, 15–16View FIGURES 15–16); MSM tooth higher and broader ( Figs. 8View FIGURES 5–8, 9–11View FIGURES 9–14, 15–16View FIGURES 15–16); MM tooth approximately as broad as high, triangular, similar in size as MSM ( Figs. 10View FIGURES 9–14, 15–16View FIGURES 15–16). Chelicera, prolateral surface with carpet-like field of barbled and bristle-like promedial (pm) setae covering the distalmost third of manus ( Figs. 5View FIGURES 5–8, 11View FIGURES 9–14). Flagellum drop-like, moderately inflated posteriorly and medially; ventral margin slightly sinuous ( Figs. 7View FIGURES 5–8, 12View FIGURES 9–14). Flagellum with minute spicules along prodorsal margin only ( Fig. 7View FIGURES 5–8); apex of the flagellum reaching two thirds of the mucron length from the base ( Figs. 7View FIGURES 5–8, 12View FIGURES 9–14); apex very narrow without distinct spicules ( Fig. 7View FIGURES 5–8).

Female paratype (CHNUFPI 2510). The coloration of the specimen has faded. Similar to males for most morphological aspects but larger in size; morphometric values in Table 1. Chelicera on lateral aspect, fixed finger highest elevation at level of FD tooth. Fixed finger robust, markedly curved towards the venter. Movable finger MP tooth moderately higher than MM tooth; MM higher than MSM ( Figs. 13–14View FIGURES 9–14); movable finger retrolateral carina similarly developed to that of male.

Notes. All the chelicerae of examined males (n = 14 chelicerae), females (n = 10) and juveniles (n = 8) were confirmed to lack the fixed finger FSD tooth. The FD tooth is broken in both chelicerae of two males (CHNUFPI 2475 and 2503).

Distribution. Gaucha cabriola  sp. nov. is known from Itacuruba, State of Pernambuco, and Jaicós, State of Piauí, both in Northeastern Brazil ( Fig. 17View FIGURE 17). Both localities are inserted within the Brazilian Caatinga, a semiarid biome.