Charinus renneri, Miranda & Giupponi & Prendini & Scharff, 2021

Miranda, Gustavo Silva de, Giupponi, Alessandro P. L., Prendini, Lorenzo & Scharff, Nikolaj, 2021, Systematic revision of the pantropical whip spider family Charinidae Quintero, 1986 (Arachnida, Amblypygi), European Journal of Taxonomy 772, pp. 1-409 : 126-127

Charinus renneri sp. nov.

urn:lsid:zoobank.org:act:53281423-876C-492D-B4E3-F655A80DFFFF

Figs 6A–B , 10I–J , 43 , 73–74 ; Table 4

Diagnosis

This species resembles C. acaraje , from which it may be separated by the number spines on the pedipalp; C. renneri sp. nov. possesses four ventral spines on the femur and five dorsal spines on the patella ( Fig. 73E–F ), whereas C. acaraje possesses three ventral spines on the femur and three dorsal spines on the patella. It can be separated from the other Charinus species in eastern South America by the widely separate sucker-like female gonopods with lateral margins projecting dorsally ( Fig. 6A–B ).

Etymology

Patronym honoring Dr Renner L.C. Baptista for his contributions to arachnology.

Type material

Holotype BRAZIL • ♀; Bahia, Campo Formoso, Lapa do Convento ; 10°30′28.07″ S, 40°19′23.12″ W; 6 Nov. 2002; A.P.L. Giupponi and R. Baptista leg.; MNRJ 9198 .

Paratypes BRAZIL • 1 ♂, 1 juv.; same collection data as for holotype; MNRJ 9198 .

Description

CARAPACE. Frontal process large, subtriangular, not visible in dorsal view ( Fig. 73C ). Median eyes and median ocular tubercle present; median ocular tubercle shallow, not higher than carapace surface, pair of small setae at base ( Fig. 73C ). Lateral eyes well developed, pale, small seta posterior to each lateral ocular triad ( Fig. 73A ).

STERNUM. Tetra-segmented, all platelets markedly sclerotized ( Fig. 73B ). Tritosternum projected anteriorly into small, blunt tubercle, surpassing base of pedipalp coxae; medial platelet (tetrasternum) and third platelet (pentasternum) forming single convex platelet, with pair of large setae anteriorly, and several small setae posteriorly; metasternum with four setae in membranous region; two or three setae, forming longitudinal row, posteriorly.

OPISTHOSOMA. Ventral sacs and ventral sac cover absent.

GENITALIA. Female genital operculum with posterior margin slightly convex, and several setae along margin and on surface ( Fig. 6A–B ). Female gonopods sucker-like, sclerotized basally, with small projections from lateral margins ( Fig. 6A–B ). Male gonopod with distal margin of fistula and base of lateral lobes narrowly sclerotized; LoL2 fimbriate and short ( Fig. 74A–D ); LaM with acute projection posteriorly ( Fig. 74A–D ).

CHELICERAE. Small tooth in retrolateral row of basal segment ( Fig. 10I–J ). Prolateral surface with transverse row of around ten small setae, from ventral to dorsal. Two setae, prolateral and retrolateral, on dorsodistal margin, near membranous region of claw. Claw with eight denticles and row of setae on retrolateral surface from base to near apex (dorsal side) ( Fig. 10I–J ); base of row with four setae, disconnected from distal row of setae (gap present between base and apex of row).

PEDIPALPS. Coxal dorsal carina with small seta and three or four setae on anterior margin of round carina. Femur with two distinct setiferous tubercles proximal to spine 1; primary series with four dorsal spines ( Fig. 73E ); small spine between dorsal spines 2 and 3 on dextral pedipalp of holotype; four ventral spines, with small spines between spines 1 and 2 and spines 2 and 3 ( Fig. 73F ); spine parallel to ventral spine 1, near base of spine I; spine parallel to spine 2; large ventral spine proximal to spine 1. Patella with five dorsal spines ( Fig. 73F ); large setiferous tubercle distal to spine I, about one-third length of spine I; three ventral spines decreasing in length; two or three setiferous tubercles between spine I and distal margin. Tibia with two dorsal spines, proximal spine two-thirds length of distal spine; ventral spine in distal half of tibia; four long setae between spine and distal margin. Tarsus with two dorsal spines (also evident in juveniles) ( Fig. 73D ); proximal spine half length of distal spine; ventral row of cleaning brush with 30–32 setae.

LEGS. Tibia of leg I with 23 articles; tarsus I with 41 articles (29 or 30 in incomplete legs). Leg IV basitibia with four pseudo-articles; trichobothrium bt situated in proximal third, near proximal margin; distal apex of basitibial pseudo-articles with dark, denticulate projection; distitibia trichobothrium bc situated closer to sbf than to bf; sc and sf series each with six trichobothria; tarsus with distinct white annulus distally on first article.

Measurements

See Table 4 .

Distribution

Known only from the type locality.

Natural history

This species inhabits a very wet cave. The type specimens were only found in the aphotic zone, on cave walls, close to water. Two other caves in the vicinity, which are hotter and drier, contained no amblypygids.

Figures

Fig. 6. Charinus Simon, 1892, female gonopods, dorsal (left column) and posterior (right column) views. A–B. Charinus renneri sp. nov. (MNRJ 9198). C–D. Charinus euclidesi sp. nov. (MNRJ 9099). E–F. Charinus carioca sp. nov. (MNRJ 9201). Scale bars: A–D = 0.25 mm; E–F = 0.1 mm.

Fig. 10. Charinus Simon, 1892, chelicerae, prolateral and retrolateral views. A–B. Charinus loko sp. nov. (SMNS). C–D. Charinus miskito sp. nov. (SMNS). E–F. Charinus mocoa sp. nov. (SMF 68). G–H. Charinus alagoanus sp. nov. (MNRJ 9295). I–J. Charinus renneri sp. nov. (MNRJ 9198). K–L. Charinus madagascariensis Fage, 1954 (MNHN). Scale bars: 0.5 mm.

Fig. 43. Map plotting known distributions of species of Charinus Simon, 1892 in eastern South America, with inset for southeastern Brazil.

Fig. 73. Charinus renneri sp. nov. (MNRJ 9198), general morphology, ♀. A. Carapace, dorsal view. B. Sternum, ventral view. C. Frontal process. D. Pedipalp tarsus, frontal view. E. Pedipalp, dorsal view. F. Pedipalp, ventral view. Scale bars: A–B, E–F = 1 mm; C–D = 0.5 mm.

Fig. 74. Charinus renneri sp. nov. (MNRJ 9198), male gonopod. A. Ventral view. B. Lateral lobe 2, lamina medialis, processus internus and fistula. C. Posterior view. D. Lateral lobe 2, lamina medialis, processus internus and fistula.