Bioacoustics of Diplocephalus komposchi

Description. Holotype male ( Figs. 4–8 , NHMW 27.619). Additional MCT images were taken from male paratype from site 19E ( Figs. 9–12 , NHMW 27.621). Total body length 2.14. Cephalothorax/Prosoma smooth; brown with some darker markings; 0.96 long, 0.74 wide; with two large lobe-like projections ( Figs. 4, 5 ) which are divided by a transverse groove, the anterior lobe is biconcave, the posterior lobe is finger-shaped ( Figs. 4, 5 ); small grooves slightly above PLE; clypeus smooth. AME the smallest, located on tip of anterior lobe, ALE, PME and PLE oval of nearly equal sizes, PME on posterior lobe, about its diameter from tip, ALE and PLE very close to each other. Chelicerae with stridulatory organ; five promarginal teeth, three retromarginal denticles. Sternum smooth, brown; 0.54 long, 0.54 wide. Legs yellow-brown; coxae apically dark. Tibial spine formula 2:2:1:1; TmI 0.54 (left), 0.48 (right). Pedipalp yellow-brown, tibia and cymbium brown, patella length/width ratio = 4. Tibia with one retrolateral and one prolateral trichobothrium, prolateral tibial apophysis prominent. Protegulum present; suprategular apophysis deriving from the suprategulum with marginal apophysis, distal apophysis and inner apophysis; the inner suprategular apophysis is bifurcate, consisting of a large and a small branch. Embolic division complex, embolus short, with pointed tip, mostly covered by an embolic membrane; anterior radical process distinct, clearly curved; radical tailpiece with broad tip. Female allotype ( Figs. 1–3 ): Total length 1.96. Cephalothorax/Prosoma smooth, dark brown; 0.86 long, 0.64 wide; clypeus smooth. Posterior eye row straight, anterior row slightly procurved, AME the smallest, separated by their diameter, PLE and PME of equal size, PME separated by nearly half their diameter, ALE larger, oval. Chelicerae with stridulatory organ, five promarginal teeth, four retromarginal denticles. Sternum smooth, dark brown; 0.48 long, 0.48 wide. Legs yellow-brown; coxae apically dark. Tibial spine formula 2:2:1:1; TmI 0.52 (left), 0.50 (right). Ventral epigynal plate longitudinally bisected. Anteriorly, ventral epigynal plates directly adjoining each other, leaving only a small fissure at ¼ of its length. Posteriorly, ventral epigynal plates diverging, showing a triangular part of dorsal plate with nearly straight lateral margins. The height of this isosceles triangle is almost twice the length of its base. Anteriorly, a distinct rim is visible. Horizontal middle part of anterior rim almost the same length as triangle base. Vulva with one pair of oblong spermathecae, copulatory ducts and fertilization ducts arise independently, fertilization duct mesally oriented. Taxonomic remarks. We were unable to match the newly discovered species with other Diplocephalus species on the basis of illustrations in the literature. In males, the shape of the two lobes on the prosoma are distinct features; however, there is slight variation in the length of these head projections, as well as in the angle between them and in their angle relative to the prosoma. Referring to the findings of Frick et al. (2010) , Diplocephalus komposchi n. sp . is clearly a true member of the Savignia -group, since it possesses a bisected epigynum.