Bioacoustics of Nerudia hoguera

( FIGS 13 , 14 ) Z o o b a n k r e g i s t r a t i o n: u r n: l s i d: z o o b a n k. org:act: D72E218E-77C9-4026-AF20-DE2D591CFB 4F . Diagnosis: Distinguished from known congeners by armature of male chelicerae ( Fig. 1 3G, H ; frontal apophyses in lateral position, relatively long, tip flattened, i.e. wide in frontal view, pointed in lateral view), by shape of procursus ( Fig. 13A– C ; slender, with simple pointed tip; similar to N. poma ), by bulbal processes ( Fig. 13D–F ; ventral apophysis almost straight, longer than embolus), and by epigynum and female internal genitalia ( Figs 13I , 14 ; epigynal plate with wide posterior indentation; internal genitalia with large median ‘receptacle’, with median sclerite similar to N. poma ). Type material: ARGENTINA – La Rioja : • ♂ holotype ; between Chilecito and Famatina; 29.0027° S , 67.4855° W ; 1300 m a.s.l. ; 9 Mar. 2019 ; B. A. Huber and M. A. Izquierdo leg.; LABRE-Ar 586 • 2 ♀♀ paratypes ; same data as holotype; ZFMK Ar 23889 . Other material examined: ARGENTINA – La Rioja : • 3 ♀♀ in pure ethanol; same data as holotype; ZFMK Arg159 . Etymology: The species epithet hoguera (from Spanish meaning ‘bonfire’) is taken from Pablo Neruda’s poem ‘Soneto 22’; noun in apposition. Description Male ( holotype ). Measurements: Total body length 1.53, carapace width 0.68. Distance PME–PME 60 µm; diameter PME 60 µm; distance PME–ALE 20 µm; distance AME–AME 15 µm; diameter AME 40 µm. Leg 1: 5.73 (1.55 + 0.25 + 1.60 + 1.73 + 0.60), tibia 2: 1.35, tibia 3: 1.10, tibia 4: 1.50; tibia 1 L/d: 23. Colour (in ethanol): Prosoma and legs pale ochre-yellow; with indistinct ochre mark medially on carapace; legs without dark rings; abdomen monochromous light grey. Body: Habitus as in N. poma (cf. Fig. 1B ). Ocular area barely raised. Carapace with indistinct thoracic groove. Clypeus unmodified, only at rim slightly sclerotized. Sternum wider than long (0.48/0.44), with pair of distinct anterior processes near coxae 1. Abdomen globular. Chelicerae: As in Figure 13G, H ; with pair of frontal apophyses in lateral position, directed forward, tip flattened, i.e. wide in frontal view, pointed in lateral view; stridulatory files on pair of low lateral protrusions. Palps: In general, similar to N. colina (cf. Fig. 4 ); coxa unmodified; trochanter with indistinct ventral projection; femur cylindrical, slightly widened distally, proximally with indistinct retrolateral hump and prolateral stridulatory pick (modified hair), femur relatively short (length/width: 1.81); patella short; tibia globular (length/ width: 1.05); procursus simple ( Fig. 13A–C ), slender, with simple pointed tip; genital bulb with weakly curved ventral apophysis, embolus partly membranous, shorter than ventral apophysis ( Fig. 13D–F ). Legs: Without spines and curved hairs; with vertical hairs in two rows (prolateral, retrolateral) proximally on tibia 1 only; retrolateral trichobothrium of tibia 1 at 65%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~eight pseudosegments, distally distinct. Female: In general, similar to male but sternum without pair of anterior humps. Tibia 1 in five females : 1.20–1.55 (mean 1.46). Epigynum ( Fig. 14A ) anterior plate weakly protruding, trapezoidal, with wide posterior indentation; posterior plate large, simple. Internal genitalia ( Figs 13I , 14B, D ) with large median ‘receptacle’ and sclerite at median line. Distribution: Known from type locality only, in Argentina , La Rioja ( Fig. 3 ). Natural history: The spiders were found by turning rocks in ravines on an arid slope. When disturbed, they moved slowly. They shared the microhabitat with two other Ninetinae : Nerudia ola and Gertschiola macrostyla .