Bioacoustics of Physocyclus mariachi

Description Male ( holotype , CNAN-T01471) MEASUREMENTS. Total length 2.5. Carapace 1.11 long, 1.3 wide. Clypeus 0.5 long. Diameter AME 0.08, ALE 0.12, PME 0.10, PLE 0.12. Distance ALE-PME 0.06, PME-PME 0.13. Leg lengths: I (total 23.5): femur 6.4/patella 0.5/tibia 6.7/metatarsus 8.5/tarsus 1.3; tibia II: 4.5; tibia III: 3.1; tibia IV: 5; tibia I L/d 40.5. PROSOMA. Carapace light beige with Y-shaped light gray pattern around fovea and posterior part of carapace. Fovea longitudinal. Carapace with three irregular spots on each side ( Figs 14–15 ). Clypeus wide, with dark brown irregular mark lengthwise ( Fig. 17 ). Chelicerae pale, with two lateral apophyses on each side, with triangular tip and pointing down ( Figs 17–19 , 24–25 ). Anterior apophyses of chelicerae wide, dark, sclerotized, with small cones, in lateral view looks like a sawn surface. Posterior apophyses of chelicera small and thinner than anterior apophyses, with 4–5 sclerotized cones on each side ( Figs 17–19 , 24–25 ). Chelicerae with stridulatory files. Sternum light beige, with small and inconspicuous light brown spots. Labium brown, wider than long. Endites brown prolaterally, beige retrolaterally, longer than wide ( Fig. 16 ). LEGS. All segments with beige coloration. Tibiae and femora with brown rings distally. Trochanters light brown ( Figs 14–16 ). OPISTHOSOMA. Globular, longer than wide, high, with numerous white, gray and dark spots ( Figs 14– 15 ). Spinnerets dark brown, with short seta around ( Fig. 16 ). PALP. DAP wide and dark ( Fig. 21 ). PR entirely dark, with notch in middle part, ending in long thin spine ( Figs 21–23 , 26 ). ES small and short, with oval shape in prolateral and retrolateral views ( Figs 20–21 , 26 ), wide, long and sinuous in dorsal view ( Figs 22–23 , 27 ). E small and short in retrolateral view, ending in a small tip. SO positioned in distal part of E ( Fig. 26 ). Female ( paratype , CNAN-T01472) Similar to the male, differences: PROSOMA. Carapace clearer, almost white, with darker dorsal pattern ( Fig. 28 ). Carapace with small protuberance on posterior part ( Fig. 29 , red arrow). Sternum brown, with beige region in middle part ( Fig. 30 ). Clypeus darker than in male, beige region in central part. Chelicerae with brown coloration, without LAC or sclerotized cones ( Fig. 29 ). OPISTHOSOMA. With dorsal patch in anterior part ( Fig. 28 , red arrow). This structure might be a functional complex (with the protuberance of prosoma). LEGS. Femora and tibiae with darker rings distally ( Figs 28–30 ). EPIGYNUM. Wider than long, bell-shaped, with VAE small, conical, pointing forward, surrounded by dark spot, with clear stripe across epigynum longitudinally ( Figs 31–32 ). PP small and elongated, ovalshaped, located in perpendicular position ( Fig. 33 ). MEASUREMENTS. Total length 3.7. Carapace 1.2 long, 1.2 wide. Clypeus 0.4 long. Diameter AME 0.08, ALE 0.12, PME 0.11, PLE 0.11. Distance ALE-PME 0.06, PME-PME 0.12. Leg lengths: I (total 16.8): femur 4.4/patella 0.5/tibia 4.6/metatarsus 6.1/tarsus 1.1; tibia II: 3.3; tibia III: 2.4; tibia IV: 3.6; tibia I L/d: 24.6. Variation Females Female collected in Plan de Barrancas is bigger than female collected at type locality. With an ocher coloration. The coloration of the dorsal pattern of the carapace and chelicerae is darker in this female. ( N =1): Tibia I: 5.7; tibia II: 3.9; tibia III: 2.9; tibia IV: 4.4; tibia I L/d: 26.2.