Charinus una, 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 : 137-139

Charinus una sp. nov.

urn:lsid:zoobank.org:act:B2646A6F-9AD9-47A1-A8A4-22B262034D8F

Figs 43 , 78–79 ; Table 4

Diagnosis

This species may be separated from other Charinus in eastern South America by means of the following combination of characters: median and lateral eyes present ( Fig. 78A ); carina ventral to lateral eyes; cheliceral claw with four or five denticles and two patches of setae on retrolateral surface; secondary sexual dimorphism absent; pedipalp femur with three dorsal spines and four ventral spines ( Fig. 78E–F ); tibia of leg I with 23 articles, tarsus I with 41 articles; leg IV distitibia sf and sc series each with five trichobothria.

This species resembles C. acaraje , but is smaller in size, with four or five teeth on the cheliceral claw, and five trichobothria in the sc and sf series of the leg IV distitibia.

Etymology

Noun in apposition referring to the type locality, the Una Biological Reserve, and the Una Municipality, in which it is located.

Type material

Holotype BRAZIL • ♂; Bahia, Una, Una Biological Reserve ; 15°11′43.48″ S, 39°1′47.58″ W; 9 Jun. 2009; A. Chagas, Jr, A. Kury, D. Pedroso, A.P.L. Giupponi and V. Dill leg.; MNRJ 9131 .

Paratypes BRAZIL • 1 ♀; same collection data as for holotype; MNRJ 9131 • 1 ♀; Mata do Lixão ; 9 Jun. 2009; A. Chagas Jr, A. Kury, D. Pedroso, A.P.L. Giupponi and V. Dill leg.; MNRJ 9298 • 1 ♀, 1 juv.; Mata do Lixão ; 9 Jun. 2009; A. Chagas, Jr, A.P.L. Giupponi, D. Pedroso and A. Kury leg.; MNRJ 9132 .

Additional material

BRAZIL • 1 juv.; Bahia, Una, Una Biological Reserve, Trilha do Rio Maruim II ; 15°10′05.1″ S, 39°03′52.6″ W; 21 Aug. 2014; A.A. Nogueira leg.; MZSP 67527 .

Description

CARAPACE. Curved carina between ocular triads and carapace margin, closer to margin than eyes, and with small transverse projection medially. Frontal process large, triangular, not visible in dorsal view ( Fig. 78C ). Median eyes and median ocular tubercle present ( Fig. 78A ); median ocular tubercle shallow,

slightly higher than carapace surface, with pair of small setae. Lateral eyes well developed, pale, small seta posterior to each lateral ocular triad.

STERNUM. Tritosternum projected anteriorly, surpassing base of pedipalp coxae, and rounded posteriorly ( Fig. 78B ). Medial platelet (tetrasternum) and third platelet (pentasternum) forming single convex platelet, with pair of large setae anteriorly, and several small setae posteriorly. Metasternum with two anterior setae in membranous region and two setae 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. 79A–C ). Gonopods sucker-like, with large opening and small sclerotized area basally (disconnected from each other) ( Fig. 79A, C–D ); smooth surface between gonopods and posterior margin of genital operculum ( Fig. 79E ); slit sensilla on lateral margin of genital operculum ( Fig. 79F ). Male gonopod with LoL2 not fimbriate, slightly sclerotized.

CHELICERAE. Small, flat tooth in retrolateral row of basal segment. Prolateral surface with transverse row of seven small setae, from ventral to dorsal. Claw with four or five teeth. Three setae, retrolateral, retromedial, and prolateral, on dorsodistal margin, near membranous region of claw. Retrolateral surface of claw with two small patches of setae, basally and medially.

PEDIPALPS. Coxal dorsal carina with one or two small setae and two setae on anterior margin of round carina. Femur with three distinct setiferous tubercles proximal to spine 1 ( Fig. 78E ); primary series with three dorsal spines; four ventral spines ( Fig. 78F ); large ventral spine proximal to spine 1, between spine 1 and proximal margin. Patella with three dorsal spines ( Fig. 78E ); setiferous tubercle distal to I and about one-third length of spine I; two ventral spines decreasing in length; setiferous tubercle between spine I and distal margin. Tibia with two dorsal spines, proximal spine two-thirds length of distal spine; ventral spine situated in distal half of tibia; prominent setiferous tubercle near base of spine; three long setae between spine and distal margin. Tarsus with two dorsal spines, distal spine one-third length of tarsus, proximal spine one-third length of distal spine ( Fig. 78D ); ventral row of cleaning brush with 31–32 setae.

LEGS. Tibia of leg I with 23 articles; tarsus I with 41 articles. Leg IV basitibia with four pseudoarticles; trichobothrium bt situated in proximal third; 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 five trichobothria; distitarsus with distinct white annulus distally on first article.

Measurements

See Table 4 .

Distribution

Known only from the type locality.

Natural history

Found in protected and disturbed areas, in the vicinity of a dumping ground.

Key to the identification of the species of Charinus in eastern Africa

1. Median and lateral eyes well developed ( Fig. 81A ); pedipalp femur with five or six dorsal spines and four ventral spines ( Fig. 81 ); pedipalp patella with six or seven dorsal spines and five or six ventral spines ( Fig. 81A ); pedipalp tarsus with three dorsal spines ................................................................ .......................................................................................... C. madagascariensis Fage, 1954 ( Fig. 81 )

– Median and lateral eyes reduced ( Fig. 82A ); pedipalp femur with three dorsal spines and three ventral spines ( Fig. 82E–F ); pedipalp patella with four dorsal spines and three ventral spines ( Fig. 82E–F ); pedipalp tarsus with one dorsal spine ( Fig. 82C ) .................................. C. susuwa sp. nov. ( Fig. 82 )

Figures

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

Fig. 78. Charinus una sp. nov. (MNRJ 9131), general morphology, ♂. A. Habitus, 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 = 0.1 mm; D = 0.5 mm.

Fig. 79. Charinus una sp. nov. (MNRJ 9131), female gonopod and genital operculum. A. Sucker-like gonopod, dorsal view. B. Genital operculum, ventral view. Inset: cerotegument. C. Gonopods, posterior view. D. Aperture on sinistral side of sucker-like gonopod, dorsal view. E. Posterior margin of genital operculum. F. Gland opening near lateral margin of genital operculum.

Fig. 81. Charinus madagascariensis Fage, 1954 (MNHN), habitus, ♂. A. Dorsal view. B. Ventral view. Scale bars: 1 mm.

Fig. 82. Charinus susuwa sp. nov. (BMNH), general morphology, ♀. A. Carapace, dorsal view. B. Sternum, ventral view. C. Pedipalp tarsus, frontal view. D. Frontal process. E. Pedipalp, dorsal view. F. Pedipalp, ventral view. Scale bars: A, E–F = 1 mm; B–D = 0.5 mm.