Charinus monasticus, 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 : 117-119

Charinus monasticus sp. nov.

urn:lsid:zoobank.org:act:5B686BD6-1303-420C-B358-2BFD15FB6C7C

Figs 43 , 69–70 ; Table 4

Diagnosis

This species may be separated from other Charinus in eastern South America by means of the following combination of characters: metasternum without anterior setae in membranous region, but with four setae posteriorly; two small, flat teeth in retrolateral row of basal cheliceral segment; cheliceral claw with five teeth; pedipalp femur with setiferous tubercle proximal to ventral spine 1, i.e., between spine 1 and proximal margin; tibia of leg I with 21 articles, tarsus I with 37 articles; leg IV distal apex of basitibial pseudo-articles without dark, denticulate projection; distitibia with two pseudo-articles; trichobothrium bt situated in proximal third.

This species resembles C. ricardoi , but differs in the count of ventral spines on the pedipalp: three ventral spines are present in C. monasticus sp. nov., compared with four in C. ricardoi . The male is unknown.

Etymology

Adjective refering to a monastery; the type locality is a convent.

Type material

Holotype BRAZIL • ♀; Rio de Janeiro, Convento Santo Antônio ; 22°54′25.79″ S, 43°10′45.23″ W; Oct. 2007; D. Pedroso leg.; MNRJ 9103 .

Paratypes BRAZIL • 49 ♀♀; same collection data as for holotype; MNRJ 9103 .

Description

CARAPACE. Frontal process large, triangular, not visible in dorsal view ( Fig. 69A ). Median eyes and median ocular tubercle absent ( Fig. 69C ); one or two setae situated in place of median ocular tubercle. Lateral eyes reduced, pale, small seta posterior to each lateral ocular triad.

STERNUM. Tritosternum projected anteriorly into large, blunt tubercle, surpassing base of pedipalp coxae ( Fig. 69B ). Medial platelet (tetrasternum) and third platelet (pentasternum) forming single convex platelet, with pair of large setae anteriorly, and several small setae posteriorly. Metasternum without anterior setae in membranous region, with four setae posteriorly.

OPISTHOSOMA. Ventral sacs and ventral sac cover absent.

GENITALIA. Posterior margin of female genital operculum slightly convex, with several setae along margin and on surface ( Fig. 70A–C ). Gonopods with small sclerotized region basally (disconnected); gonopods cushion-like with large opening ( Fig. 70A, C, E ); gland openings inside gonopod atrium ( Fig. 70F ); posterior margin of genital operculum with smooth surface ( Fig. 70D ). Male unknown.

CHELICERAE. Two small, flat teeth in retrolateral row of basal segment. Prolateral surface with transverse row of four small setae, from ventral to dorsal; three setae situated ventrally whereas dorsalmost seta separated from row, displaced dorsally. Two setae, retrolateral and prolateral, on dorsodistal margin, near membranous region of claw. Claw with five denticles and with two small patches of setae, basally and dorsally, on retrolateral surface.

PEDIPALPS. Coxal dorsal carina with four or five small setae and four setae on anterior margin of round carina. Femur with three distinct setiferous tubercles proximal to dorsal spine 1 ( Fig. 69E ); primary series with three dorsal spines ( Fig. 69E ); three ventral spines (one specimen with four) ( Fig. 69F ); one setiferous tubercle proximal to spine 1, between spine 1 and proximal margin. Patella with three dorsal spines ( Fig. 69E ); setiferous tubercle distal to spine I, about one-third length of spine I; two ventral spines decreasing in length ( Fig. 69F ); three setiferous tubercles 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 its base; four long setae between spine and distal margin. Tarsus with two dorsal spines, distal spine half length of tarsus, proximal spine one-third length of distal spine ( Fig. 69D ); ventral row of cleaning brush with 39–40 setae.

LEGS. Tibia of leg I with 21 articles; tarsus I with 37 articles. Leg IV basitibia with two pseudo-articles; trichobothrium bt situated in proximal third; distal apex of basitibial pseudo-articles without dark, denticulate projection. Leg IV distitibia trichobothrium bc situated closer to sbf than to bf; sf and sc series each with five trichobothria. Leg IV tarsus with distinct white annulus distally on first article.

Measurements

See Table 4 .

Distribution

Known only from the type locality.

Natural history

Only recorded underneath a monastery in the city center of Rio de Janeiro, Brazil.

Figures

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

Fig. 69. Charinus monasticus sp. nov. (MNRJ 9103), 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 = 0.5 cm; B, E–F = 1 mm; C–D = 0.5 mm.

Fig. 70. Charinus monasticus sp. nov.(MNRJ 9103), female gonopodand genital operculum.A. Cushionlike gonopod, dorsal view. B. Posterior margin of genital operculum, ventral view. C. Gonopods, posterior view.D. Genital operculum between gonopods.E. Dextral gonopod and gonopore.F. Glandular openings inside gonopod projection.