Charinus guayaquil, 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 : 74-75

Charinus guayaquil sp. nov.

urn:lsid:zoobank.org:act:032D5F71-C742-48E8-BA93-B9488833BAD9

Figs 34–35 ; Table 3

Diagnosis

This species may be separated from other Charinus in western South America by means of the following combination of characters: small size; tegument pale whitish in color; reduced median and lateral eyes ( Fig. 35A, C ); median ocular tubercle absent ( Fig. 35C ); female gonopod cushion-like; cheliceral claw with five teeth; leg IV basitibia with three pseudo-articles; sc and sf series each with five trichobothria.

Etymology

Noun in apposition referring to the municipality in which the type locality is situated.

Type material

Holotype ECUADOR • 1 ♀; Guayas, Guayaquil, Bosque Protector Cerro Blanco ; 02°10′56.39″ S, 80°01′4.87″ W; 96 m a.s.l.; 31 Mar. 2011; A. Chagas, A. Giupponi and A. Kury leg.; MNRJ 9302 .

Paratype ECUADOR • 1 ♀; same collection data as for holotype; MNRJ 9301 .

Description

CARAPACE. Ten anterior setae ( Fig. 35A ); frontal process triangular, visible in dorsal view ( Fig. 35C ). Small granules densely scattered between ocular triads and among sulci. Median eyes reduced, median ocular tubercle absent ( Fig. 35C ); pair of setae near remnants of median eyes; lateral eyes weakly developed, pale, seta posterior to each lateral ocular triad ( Fig. 35A ).

STERNUM. Tritosternum projected anteriorly, with typical setation ( Fig. 35B ); other sternal platelets broad, flat, with pair of setae on each side and some smaller setae posteriorly; pentasternum with six setae anteriorly and without seta near membranous region ( Fig. 35B ).

OPISTHOSOMA. Ventral sacs and ventral sac cover absent.

GENITALIA. Female genital operculum with prominent setae posteromedially and smaller setae near margin; posterior margin of gonopod with pair of shallow lateral sulci; gonopod cushion-like, with retrolateral margins of fold projecting over other margin; base of gonopods unsclerotized. Male unknown.

CHELICERAE. Small tooth, slightly projecting from retrolateral surface of basal segment, opposite to bifid tooth; retrolateral surface of claw with two patches of setae, one basal, other medial; claw with five teeth; transverse row of around five setae on prolateral surface of basal segment; bifid tooth on basal segment with cusps subequal in size.

PEDIPALPS. Coxal dorsal carina with two prominent setae encircled by round carina and two setae on margin. Femur with three dorsal and three ventral spines ( Fig. 35E–F ); two prominent setiferous tubercles between dorsal spine 1 and proximal margin; setiferous tubercle between ventral spine 1 and proximal margin. Patella with three dorsal spines in primary series ( Fig. 35E ); prominent setiferous tubercle distal to spine I, one-third length of spine I; patella with two ventral spines in primary series; 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. 35D ); cleaning organ with 31 setae in ventral row.

LEGS. Tibia of leg I with 23 articles; tarsus I with 41 articles; first tarsal article slightly longer than second article. Leg IV basitibia with three pseudo-articles, without sclerotized, denticulate margin at apex of articles; trichobothrium bt situated in proximal third of pseudo-article; distitibia trichobothrium bc equidistant between sbf and bf, sc and sf series each with five trichobothria.

Measurements

See Table 3 .

Distribution

Known only from the type locality. This is the first species described from continental Ecuador.

Natural history

Found under flat stones on the forest floor. The type specimens were together under the same stone. A species of Phrynus was collected in sympatry.

Figures

Fig. 34. Map plotting known distributions of species of Charinus Simon, 1892 in western South America.

Fig. 35. Charinus guayaquil sp. nov. (MNRJ 9302), 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.