Charinus sooretama, 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 : 131-132

Charinus sooretama sp. nov.

urn:lsid:zoobank.org:act:8E440763-D5D2-4177-9E29-A6B533A0604A

Figs 7E–F , 9C–D , 43 , 75 ; Table 4

Diagnosis

This species may be separated from other Charinus in eastern South America by means of the following combination of characters: males with secondary sexual dimorphism; despite the different lengths of the pedipalps of males and females, the spine counts are similar, except for the tarsus, as females appear to possess fewer spines, perhaps associated with smaller size; pedipalp tarsus with two or three dorsal spines ( Fig. 75D ).

This species resembles C. brasilianus , but differs in possessing three spines on the pedipalp tarsus.

Etymology

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

Type material

Holotype BRAZIL • ♀; Espírito Santo, Sooretama ; A.P.L. Giupponi leg.; MNRJ 9245 .

Paratypes BRAZIL • 2 ♀♀, 3 ♂♂, 2 juv.; same collection data as for holotype; MNRJ 9245 • 2 ♂♂; Espírito Santo, Estrada do Quirinão, Sooretama Biological Reserve ; 19°02′11.19″ S, 40°03′32.31″ W; 19 Apr. 2006; Arachné Expedition leg.; MNRJ 9244 .

Description

CARAPACE. Six anterior setae ( Fig. 75A ); frontal process triangular ( Fig. 75C ). Small granules densely scattered between ocular triads and among sulci. Median eyes well developed ( Fig. 75C ); median ocular tubercle reduced, with pair of setae; lateral eyes well developed, seta posterior to lateral ocular triad; lateral ocular triad well separated from carapace margin.

STERNUM. Tritosternum projected anteriorly with typical setation, long, surpassing base of pedipalp coxae ( Fig. 75B ); other sternal platelets narrow and concave, with pair of setae anteriorly on plaque and some smaller setae posteriorly; pentasternum with four setae anteriorly and pair of setae in membranous region.

OPISTHOSOMA. Ventral sacs and ventral sac cover absent.

GENITALIA. Female genital operculum with prominent setae posteromedially and some smaller setae near margin; gonopod sucker-like, sclerotized basally, with apex slightly curved outwards ( Fig. 7E–F ). Male gonopod with apical border of fistula and lateral lobe sclerotized; LoL2 fimbriate and LoD short ( Fig. 9C–D ).

CHELICERAE. Small tooth projecting from retrolateral surface of basal segment, opposite to bifid tooth; retrolateral surface of claw with continous row of setae, basally to medially; claw with seven teeth; row of four setae on prolateral surface of basal segment; bifid tooth on basal segment with dorsal cusp larger than ventral cusp.

PEDIPALPS. Coxal dorsal carina with prominent seta encircled by round carina and three setae on margin. Femur with five dorsal spines (one specimen with small spine between spines 2 and 3, spines 3 and 4, and distal to spine 4) and four (some females) or five ventral spines ( Fig. 75E–F ); two prominent setiferous tubercles between dorsal spine 1 and proximal margin; spine between spine 1 and proximal margin; long spine between ventral spines 3 and 4. Patella with five or six (one female) dorsal spines in primary series ( Fig. 75E ); prominent setiferous tubercle distal to spine I, one-third length of spine I; four ventral spines ( Fig. 75F ); prominent setiferous tubercle between spine I and distal margin. Tibia with ventral spine distally and two setae between spine and distal margin. Tarsus with three dorsal spines (only one female with three spines, others with setiferous tubercle instead), longer spines aligned in same row ( Fig. 75D ); third spine near base of proximal spine; among longer spines, proximal spine two-thirds length of distal spine; cleaning organ with 29–31 setae in ventral row.

LEGS. Tibia of leg I with 23 articles; tarsus I with 41 articles; first tarsal article similar in length to subsequent articles. Leg IV basitibia with four pseudo-articles, with sclerotized, denticulate margin at apex of articles; trichobothrium bt situated submedial on pseudo-article; distitibia trichobothrium bc situated closer to sbf than to bf, sc and sf series each with five trichobothria.

Measurements

See Table 4 .

Distribution

Known only from the type locality in the Sooretama National Park, Brazil.

Natural history

Collected under stones and fallen tree trunks.

Figures

Fig. 7. Charinus Simon, 1892, female gonopods, dorsal view (left column) and detail (right column). A–B. Charinus acaraje Pinto-da-Rocha, Machado & Weygoldt, 2002 (MNRJ 9297). C–D. Charinus palikur sp. nov. (AMCC [LP 3831]) E–F. Charinus sooretama sp. nov. (MNRJ 9245).

Fig. 9. Charinus Simon, 1892, male gonopods. A–B. Charinus euclidesi sp. nov. (MNRJ 9099), ventral view (A), posterior view (B). C–D. Charinus sooretama sp. nov. (MNRJ 9245), ventral view (B), detail of sinistral side showing lamina medialis, lateral lobe 1 and 2, and dorsal lobe (D).

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

Fig. 75. Charinus sooretama sp. nov. (MNRJ 9245), 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 = 1 cm; B = 1 mm; C = 0.1 mm; D = 0.5 mm; E–F = 0.5 cm.