Charinus aguayoi

Natural history Found under stones and inside a cave in tropical rainforest. Females may have 4 – 7 eggs or embryos (Armas 2010).

Figs 12 – 16; Table 1

Supplementary description CARAPACE. Six anterior setae (Fig. 13 A); frontal process triangular. Small granules densely scattered between ocular triads and among sulci. Median eyes present but median ocular tubercle shallow (Fig. 13 A); pair of setae on median ocular tubercle; lateral eyes well developed, seta posterior to each lateral ocular triad (Fig. 13 A); lateral ocular triad well separated from carapace margin (Fig. 13 A). STERNUM. Tritosternum projected anteriorly with typical setation, long, surpassing base of pedipalp coxae (Fig. 13 B); other sternal platelets narrow and concave, each divided (forming pairs), with seta on its top; pentasternum with two setae posteriorly and without setae near membranous region. OPISTHOSOMA. Ventral sacs and ventral sac cover absent. GENITALIA. Female genital operculum with large setae posteromedially and some smaller setae near margin (Fig. 14 A – C); posterior margin convex (Fig. 14 A – B, E); gonopod cushion-like with basal sclerotization (Fig. 14 A, C); slit sensilla on lateral side of genital operculum on ventral surface (Fig. 14 F). Male gonopod with apex of fistula and base of lateral lobe strongly sclerotized; lateral lobe 2 fimbriate, short (Fig. 15 A – B, E); lamella medialis short (Fig. 15 A); dorsal lobe with long, acute projections apically (Fig. 15 A – C, G); processus internus short (Fig. 15 F). CHELICERAE. Small tooth slightly projecting from retrolateral surface of basal segment, opposite to bifid tooth; retrolateral surface of claw with small row of setae at base of claw; claw with four or five teeth; row of around ten setae on prolateral surface of basal segment; bifid tooth with dorsal cusp larger than ventral cusp. PEDIPALPS. Coxal dorsal carina with three setae on anterior margin, without setae encircled by round carina. Femur with three dorsal spines and three ventral spines (Fig. 13 D); 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. 13 E); prominent setiferous tubercle distal to spine I, one-third length of spine I; two ventral spines; distinct setiferous tubercle between spine I and distal margin. Tibia with ventral spine distally and seta between spine and distal margin. Tarsus with two dorsal spines, distal spine long, more than half length of tarsus, proximal spine one-third length of distal spine (Fig. 13 C); cleaning organ with 29 – 33 setae in ventral row. LEGS. Tibia of leg I with 21 articles, tarsus I with 32 – 34 articles; first tarsal article three times as long as second; tarsal organ situated near base of claw (Fig. 16 A, C – D); rod sensilla with four setae in shallow groove (Fig. 16 B, E). 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 bf than to sbf; sc and sf series each with five trichobothria. Measurements See Table 1.

Diagnosis This species may be separated from other Caribbean and Central American Charinus by means of its dark coloration and secondary sexual dimorphism. Among the Caribbean species in which the male is known, C. aguayoi is the only species which exhibits the most distinct secondary sexual dimorphism, i. e., males possess much longer pedipalp segments than females. Compared to other species in which the tibia of leg I consists of 21 – 23 articles and the leg I tarsus consists of 33 articles, C. aguayoi differs from C. dominicanus, C. muchmorei and C. wanlessi in the presence of median eyes (Fig. 13 A). An ontogenetic difference is evident in the size of the median eyes, which are much smaller in adults than immatures.

Distribution Distributed across the island of Puerto Rico.

Etymology Patronym honoring Dr Carlos Guillermo Aguayo, a Cuban scientist specializing in tropical invertebrates (Moyá-Guzmán 2009).

Type material Holotype PUERTO RICO • ♀; Río Grande municipality, 300 m E of El Verde Energy Center Station; 7 Mar. 1999; S. Moyá leg.; tropical rainforest; MEBT [not examined]. Paratypes PUERTO RICO • 3 ♀♀, 3 ♂♂, 2 juv.; same collection data as for holotype; MEBT, EEA [not examined]. Additional material PUERTO RICO • 1 ♀ juv.; Aguas Buenas; 10 Feb. 2012; PRC 059; 012 CAB • 1 ♀; same collection data as for preceding; PRC 060; 013 CAB • 1 ♀; same locality as for preceding; 7 – 17 May 1973; 250 m a. s. l.; S. Peck et al. leg.; forest at Aguas Buenas cave; AMNH • 1 ♀; Route 123, 1.2 mi S of intersection with Route 524, between Utuado and Adjunctas; 18 ° 12.314 ′ N, 66 ° 43.728 ′ W; 15 Oct. 2009; 377 m a. s. l.; L. Prendini, J. Huff, L. Esposito and H. Yamaguti leg.; degraded rainforest scree slope with small stream along roadside; taken under stones; AMCC [LP 10170] • 1 ♂; Bosque Nacional El Verde, El Yunque National Forest; 18 ° 17 ′ 42.09 ″ N, 65 ° 48 ′ 00.34 ″ W; 10 Feb. 2012; USNM ENT 782819 • 1 ♂; Guajonal Yabucoa; 18 ° 03.019 ′ N, 65 ° 52.755 ′ W; 19 Jul. 2012; USNM ENT 782825 • 1 ♀; same collection data as for preceding; USNM ENT 782808 • 1 ♂ juv.; same collection data as for preceding; USNM ENT 783494 • 1 juv.; same collection data as for preceding; USNM ENT 783487 • 1 juv.; same collection data as for preceding; USNM ENT 783483 • 1 ♀; Guajonales Matuyas, Alto Maunabo; 23 Jul. 2012; USNM ENT 785110 • 1 ♂; same collection data as for preceding; USNM ENT 782527 • 1 juv.; same collection data as for preceding; CarBio 2401 A • 1 juv.; same collection data as for preceding; CarBio 541 A • 1 juv.; same locality as for preceding; 10 Feb. 2012; PRC 58; CarBio 2540 A • 1 ♂ juv.; same collection data as for preceding; CarBio 011 CAB • 1 ♀; same locality; 10 Feb. 2012; PRC 057; B 10 AB • 1 ♀; Peñuelas, Cueva Mapancha; 7 Jul. 2012; CarBio • 1 ♂; Rio Grande Rio Yunque, El Verde; 18.321688 ° N, 65.819908 ° W; 16 – 18 Jul. 2011; 100 m. a. s. l.; Agnarsson et al. Team 1 leg.; PR 001; CR-LI / BUR; USNM ENT 392977 • 1 ♂; same collection data as for preceding; USNM ENT 392962 • 1 ♀; same collection data as for preceding; USNM ENT 392752 • 1 ♂; same collection data as for preceding; USNM ENT 392988 • 1 ♀; USNM ENT 00392775 • 1 juv.; same collection data as for preceding; USNM ENT 392904 • 1 juv. ♀; same collection data as for preceding; USNM ENT 392798.