Bioacoustics of Savignia naniplopi

Description. Male. Total length 1.58. Carapace length: 0.71; width: 0.58. Carapace orange-yellow, with a long cephalic snout carrying the PME ( Figs. 5-7 ). Clypeus slanting backwards ( Fig. 5 ), vertical width: 0.13. AME very small, dark, touching each other. ALE small, pearly white , widely separated from medians and touching PLE ( Fig. 6 ). Posterior eyes pearly white, small, PME on sides of cephalic snout, halfway from tip ( Fig. 5 ). AER slightly recurved from front as well as from above. PER strongly procurved from front, strongly recurved from above ( Fig. 7 ). Chelicerae orange-yellow, with clearly visible stridulating ridges on sides. Promarginal cheliceral rim with four teeth, the smallest one closest to fang base, the largest one third from fang base. Retromarginal cheliceral rim with three small teeth close to fang base. Sternum orange yellow, shield-shaped, length: 0.47; width: 0.45. Abdomen orange-brown, fading to greyish white in alcohol, without pattern, covered with thin, pointed grey hairs. Legs orange-yellow, patella I-IV with one terminal dorsal spine, tibia I-II with one basal and one apical dorsal spine, tibia III-IV with one basal dorsal spine. One trichobothrium on metatarsus I-III, none on metatarsus IV. Leg measurements: - femur patella tibia metat. tarsus total tm I 0.68 0.16 0.68 0.58 0.45 2.55 0.37 II 0.66 0.16 0.61 0.55 0.42 2.39 0.33 III 0.58 0.13 0.53 0.47 0.37 2.08 0.33 IV 0.76 0.16 0.74 0.63 0.42 2.71 - Male palp as illustrated ( Figs. 1-4 ), tibia with dorsal, curved palpal tibial apophysis ( Fig. 4 ), bulbus with four sclerotised appendages, a thin, pointed one ( Fig. 3: a ), a tapering one with a hook-shaped tip ( Fig. 3: b ), a curved one ( Fig. 3: c ) and a large, broad, spathulate terminal one ( Fig. 3: d ). Although it is tempting to interpret appendage b ( Fig. 3 ) as the embolic division with the embolus (compare Millidge 1977: fig. 1, fig. 127), careful observation under a compound microscope showed that this structure is solid and has no duct. On the other hand, the large spathulate terminal sclerite d ( Fig. 3 ), when viewed under a compound microscope, can be seen to incorporate a thin duct running along one of the borders its flattened stalk; it probably is the embolus. However, because the opening of the duct could not be seen and because it was preferred not to dissect the single male holotype specimen for this purpose, the palpal sclerites could not be identified with certainty. Female. Total length 1.66. Carapace length: 0.68; width: 0.55. Carapace orange-yellow, with rounded front ( Fig. 12 ). Clypeus slightly slanting backwards, vertical width: 0.11. AME very small, dark, touching each other. ALE small, pearly white, widely separated from medians and touching PLE ( Fig. 12 ). Posterior eyes pearly white, small, equidistant. AER slightly recurved from front as well as from above. PER slightly procurved from front, straight from above. Chelicerae orange-yellow, with clearly visible stridulating ridges on sides. Promarginal cheliceral rim with four teeth, the smallest one closest to fang base, the largest one third from fang base. Retromarginal cheliceral rim with three small teeth close to fang base. Sternum orange yellow, shield-shaped, length: 0.42; width: 0.42. Abdomen orange-brown ( Fig. 12 ), fading to greyish white in alcohol, without pattern, covered with thin, pointed grey hairs. Legs orange-yellow, patella I-IV with one terminal dorsal spine, tibia I-II with one basal and one apical dorsal spine, tibia III-IV with one basal dorsal spine. One trichobothrium on metatarsus I-III, none on metatarsus IV. Leg measurements: - femur patella tibia metat . tarsus total tm I 0.74 0.16 0.63 0.57 0.42 2.51 0.41 II 0.68 0.16 0.53 0.53 0.42 2.31 0.34 III 0.58 0.16 0.45 0.47 0.37 2.03 0.33 IV 0.76 0.16 0.71 0.60 0.42 2.66 - Epigyne as illustrated ( Figs. 8-10 ), with longitudinal median fissure. Vulva ( Fig. 11 ) with globular, thick-walled, almost adjacent spermathecae.