Charinus longitarsus Armas & Palomino-Cárdenas, 2016

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 : 80-81

Charinus longitarsus Armas & Palomino-Cárdenas, 2016

Fig. 34 ; Table 3

Charinus longitarsus Armas & Palomino-Cárdenas in Armas et al., 2016: 44–48, figs 1–2.

Charinus longitarsus – Miranda et al. 2016c: 31.

Diagnosis

Based on the description of Armas & Palomino-Cárdenas (2016), this species may be separated from other Charinus in western South America by means of the following combination of characters: carapace, chelicerae, pedipalps and opisthosomal tergites moderately dark, yellowish-brown; legs pale yellowish-brown; ocular tubercle black; carapace and pedipalps with clavate setae; median and lateral eyes well developed; basal segment of chelicera without tooth in retrolateral row; bifid tooth on basal segment with dorsal cusp larger than ventrodistal; cheliceral claw with five teeth; pedipalp femur with three dorsal spines, three ventral spines, and two setiferous tubercles proximal to first dorsal spine; pedipalp femur with spine proximal to first ventral spine of primary series; pedipalp patella with four dorsal spines and two ventral spines, and with long setiferous tubercle between spine I and distal margin; pedipalp tarsus with two dorsal spines; leg IV basitibia with three pseudo-articles; trichobothrium bc situated closer to sbf than to bf; leg IV distitibia sc and sf series each with five trichobothria; tibia of leg I with 23 articles, tarsus I with 27–30 articles.

Charinus longitarsus differs from other Charinus species in the combination of the long first article of the leg I tarsus, the clavate setae on the tegument, and sternites with plate-like platelets. These characters are otherwise present only in C. carvalhoi sp. nov., C. magalhaesi sp. nov. and C. montanus . Charinus carvalhoi sp. nov. and C. montanus may be easily distinguished by the shape of the female gonopod, which is sucker-like, and the number of pseudo-articles in the basitibia of leg IV, three in C. longitarsus compared with four in C. montanus and and two in C. carvalhoi sp. nov. Charinus montanus exhibits secondary sexual dimorphism, with the male pedipalps longer than those of the female, but sexual dimorphism is not mentioned in the original description of C. longitarsus .

Etymology

Adjective referring to the elongate first tarsal segment of the antenniform leg I ( Armas et al. 2016).

Type material

Holotype PERU • ♀; Cusco Department, La Convención Province, Huyro ; 13°00′03″ S, 72°33′13″ W; 1642 m a.s.l.; 13 Feb. 2016; A.C. Palomino C. leg.; UNSAAC [not examined].

Paratype PERU • 1 ♂; Cusco Department, La Convención Province, Huyro ; 13°00′01″ S, 72°33′14″ W; 13 Feb. 2016; A.C. Palomino C. leg.; UNSAAC [not examined] .

Measurements

See Table 3 .

Distribution

Known only from the type localities.

Natural history

The type specimens were found under small stones along trails in an area of humid montane subtropical forest, at an altitude of 1210–1642 m, where the median annual temperature is 23.3°C and mean annual precipitation is 1052 mm ( Armas et al. 2016). Three females with brood sacs were found with six, seven and eight eggs or embyos, respectively ( Armas et al. 2016).

Remarks

Armas et al. (2016: 49, fig. 2d) described the female gonopod as sucker-like but their figure illustrates a cushion-like gonopod, which is markedly sclerotized at the apex and margin.

Figures

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