Charinus perquerens, 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 : 64-65

Charinus perquerens sp. nov.

urn:lsid:zoobank.org:act:3ED8B7F8-C8A9-400C-B62C-793ACDD69184

Figs 27 , 32 ; Table 2

Diagnosis

Charinus perquerens sp. nov. can be separated from other Charinus in Amazonia and northern South America by means of the following combination of characters: relatively large size; female gonopod cushion-like; pedipalp femur with four dorsal spines and four ventral spines ( Fig. 32E–F ).

Charinus perquerens sp. nov. can be differentiated from C. magalhaesi sp. nov., the closest species geographically, by the greater number of pedipalp spines, including four dorsal spines and four ventral spines on the femur.

Etymology

Noun in apposition taken from the noun ‘ perquerens ’, meaning ‘researcher’, honoring scientists of the National Institute for Amazonian Research (INPA), Manaus, Brazil.

Type material

Holotype BRAZIL • ♀; Amazonas, Manaus, Campus INPA ; 03°05′41.67″ S, 59°59′22.41″ W; 17–19 Mar. 2015, A.P.L. Giupponi and G.S. Miranda leg.; INPA ex MNRJ 9283 .

Paratypes BRAZIL • 7 juv.; same collection data as for holotype; MNRJ 9283 .

Description

CARAPACE. Six anterior setae ( Fig. 32A ); frontal process triangular ( Fig. 32C ). Small granules, densely scattered between ocular triads and among sulci. Median eyes and median ocular tubercle absent ( Fig. 32C ); lateral eyes well developed, seta posterior to each lateral ocular triad; lateral ocular triad well separated from carapace margin ( Fig. 32A ).

STERNUM. Tritosternum projected anteriorly with typical setation, long, surpassing base of pedipalp coxae ( Fig. 32B ); other sternal platelets narrow and concave, with pair of setae anteriorly; pentasternum with four setae anteriorly and without seta near membranous region.

CHELICERAE. Small, flat tooth on retrolateral surface of basal segment, opposite to bifid tooth; seta absent on retrolateral surface of cheliceral claw; cheliceral claw with five teeth; three or four rows of 20 setae on prolateral surface of cheliceral basal segment; bifid tooth on basal segment with dorsal cusp larger than ventral cusp.

OPISTHOSOMA. Ventral sacs and ventral sac cover absent.

GENITALIA. Female genital operculum with prominent setae posteromedially and some smaller setae near margin; gonopod cushion-like markedly sclerotized from base to apex. Male unknown.

PEDIPALPS. Coxal dorsal carina with one to three prominent setae encircled by round carina and two or three setae at margin. Femur with four dorsal spines and four ventral spines ( Fig. 32E–F ); three prominent setiferous tubercles between first dorsal spine and proximal margin; one setiferous tubercle between ventral spine 1 and proximal margin. Patella with three dorsal spines in primary series ( Fig. 32E ); prominent setiferous tubercle distal to spine I, one fifth length of spine I; two ventral spines; prominent setiferous tubercle between spine I and distal margin. Tibia with ventral spine distally and two setae between spine and distal margin. Tarsus with two dorsal spines, proximal spine one-third length of distal spine ( Fig. 32D ); cleaning organ with 28 setae in ventral row.

LEGS. Tibia of leg I with 21 articles; tarsus I with 35–37 articles; first tarsal article shorter than subsequent articles. Leg IV basitibia with three pseudo-articles, without sclerotized, denticulate margin projecting from apex of articles; trichobothrium bt situated in proximal third of pseudo-article; distitibia trichobothrium bc situated closer to sbf than to bf, sc and sf series each with five trichobothria.

Measurements

See Table 2 .

Distribution

Known only from the type locality.

Natural history

Found under tree trunks and stones in area of secondary tropical forest.

Figures

Fig. 27. Map plotting known distributions of species of Charinus Simon, 1892 in northern South America.

Fig. 32. Charinus perquerens sp. nov. (MNRJ 9283), 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–D = 0.5 mm.