Bioacoustics of Ninetis marnif

Description Male ( holotype ) MEASUREMENTS. Total body length 0.93, carapace width 0.38. Distance PME-PME 30 µm; diameter PME 35 µm; distance PME-ALE 20 µm; distance AME-AME 10 µm; diameter AME 15 µm. Leg 1: 1.76 (0.50 + 0.14 + 0.46 + 0.40 + 0.26), tibia 2: 0.38, tibia 3: 0.32, tibia 4: 0.52; tibia 1 L/d: 8; diameters of leg femora 90 µm, of leg tibiae 55 µm. COLOUR (in ethanol). Prosoma and legs ochre to light brown, carapace without darker pattern; legs without darker rings; abdomen ochre-grey with darker internal marks dorsally and laterally; ventrally with ochre-brown plate in front of gonopore. BODY. Habitus as in Fig. 3G . Ocular area barely raised. Carapace without thoracic groove (cf. Fig. 31A ). Clypeus unmodified, without sclerotized rim. Sternum slightly narrower than long (0.28/0.30), without anterior processes near coxae 1. Abdomen oval to globular; gonopore without epiandrous spigots ( Fig. 31E ); spinnerets as in congeners ( Fig. 31G ). CHELICERAE. As in Fig. 29G–I ; without frontal modification; stridulatory files poorly visible in dissecting microscope, consisting of approximately 25 ridges ( Fig. 31D ), distances between ridges ~1.8 µm. PALPS. As in Figs 28 , 32A, B ; coxa unmodified; trochanter ventrally slightly protruding; femur proximally with very indistinct retrolateral protrusion followed distally by shallow depression, with prolateral stridulatory pick, distally slightly widened but otherwise unmodified; femur-patella joints not shifted toward one side; tibia with two trichobothria in relatively distal position; tibia-tarsus joints not shifted toward one side; tarsus with strong dorsal hairs, tarsal organ capsulate ( Fig. 32C ). Procursus ( Fig. 29A–C ) small, distally curved towards dorsal, ventrally semi-transparent; genital bulb ( Fig. 29D–F ) with pointed ventral process and very short membranous dorsal process (putative embolus). LEGS. Without spines, without curved hairs; with many short vertical hairs on tibia 1 only, in several rows with ~25 hairs each ( Fig. 32E ; barely visible in dissecting microscope); retrolateral trichobothrium of tibia 1 at 60%; prolateral trichobothrium absent on tibia 1; thin metatarsal hairs present on metatarsi 3 (one hair) and 4 (three to four hairs), in proximal ventral position (cf. Fig. 32F–H ); tarsus 1 with ~4 pseudosegments, barely visible in dissecting microscope; tarsal organs on legs 3 and 4 apparently non-functional ( Fig. 33C, D ). Chemosensory hairs, trichobothria, other tarsal organs, rimmed pores, cuticular plates, and tarsal claws as in congeners ( Figs 32 , 33 ). Variation (male) Tibia 1 in 11 males (incl. holotype ): 0.40–0.49 (mean 0.45). Female Females are much lighter than males; this difference is even more pronounced in live specimens ( Fig. 3H ). Chelicerae without stridulatory files ( Fig. 31B ), tibia 1 without short vertical hairs. Tibia 1 in 18 females : 0.36–0.46 (mean 0.41). Epigynum ( Figs 30 , 31F ) anterior plate very short, roughly semi-circular, without pocket; posterior plate wide, as long as anterior plate. Internal genitalia ( Figs 30 , 34D ) with pair of distinctive sclerites near median line, directed towards posterior, i.e. covered by posterior epigynal plate; apparently without pore plates. Intraspecific distances. The genetic (K2P) distances between three sequenced specimens ranged from 13–15% ( Table 2 ). No morphological differences were seen among specimens of the three localities.