Bioacoustics of Galapa bella

Redescription (amendments of Huber 2000 , based on specimens reported in Huber & Acurio 2022 ) Male carapace width 0.47–0.53. Distance PME-PME 45 µm; diameter PME 45 µm; distance PME-ALE 15 µm; distance AME-AME 15 µm; diameter AME 30 µm. Tibia 1 in four males (including holotype ): 0.66, 0.67, 0.68, 0.74; diameters of leg femora 0.10, of leg tibiae: 0.06. Clypeus not more protruding than in female, without sclerotized rim. Sternum with pair of barely visible anterior humps near coxae 1 (~5 µm high, 20 µm diameter at basis). Gonopore with four epiandrous spigots arranged in two pairs ( Fig. 6F ). ALS with one strongly widened spigot, one long pointed spigot, and five cylindrical spigots, of which one is much wider than the others ( Fig. 6C ); PMS with two conical spigots ( Fig. 6C ); PLS without spigots. Chelicerae in general very similar to congeners (cf. Huber 2000 : fig. 384), with curved process proximally on fang ( Fig. 8A ); with stridulatory files consisting of ~50 ridges, distances between ridges 1.5–1.6 µm throughout, without further fine subdivision ( Fig. 8B ). Palpal femur proximally with prolateral stridulatory pick ( Fig. 8C ); femur-patella joints strongly shifted towards prolateral side; tibia oval, with two trichobothria; tibia-tarsus joints barely shifted towards retrolateral side; palpal tarsal organ strongly raised ( Fig. 9A–C ), diameter 6.7 µm, diameter of opening 1.7 µm; procursus with pointed retrolateral-distal process directed towards proximal and dorsal ( Fig. 7B ); tip of dorsal process covered by dorsal flap of genital bulb ( Fig. 7B ) but not lodged in pocket as in South American congeners; genital bulb with large distal apophysis ( Fig. 7B ), apparently without retrolateral-dorsal process and ventral processes; sperm duct opening on prolateral-ventral side directly on bulb ( Fig. 7H ). Legs with round cuticular plates ( Fig. 10A, B ; diameter 4–5 µm) and rimmed pores ( Fig. 10A–C ; outer diameter 3.4–3.7 µm, diameter of opening 0.2 µm) apparently on all leg segments. Sexually dimorphic short vertical hairs present on tibiae 1 and 2 ( Fig. 8E–H ), length ~15 µm, diameter at basis 1.2 µm. Chemoreceptive hairs similar in size (length ~13 µm, diameter at basis 1.7 µm) but with side branch ( Fig. 10F ). Retrolateral trichobothrium of tibia 1 at 60%; prolateral trichobothrium absent on tibia 1. Leg tarsal organs capsulate ( Fig. 9E, F ; diameter 3.7–4.5 µm, diameter of opening 1.0–1.4 µm). Main tarsal claws with ~10–11 tines ( Fig. 10F, G ). Female in general similar to male but sternum without anterior humps, chelicerae without stridulatory files ( Fig. 8D ), cheliceral fangs unmodified. Tibia 1 in two females : 0.65, 0.68 ( Huber 2000 ). The female from Santa Cruz, near Canal de Itabaca, has longer legs (tibia 1: 0.78) and a CO1 distance to specimens from 1 km SW of Garrapatero beach of 8.8–9.0%. It may in fact represent a different species. Spinnerets as in male ( Fig. 6B, D ). Epigynum ( Figs 6E , 11A, B ) with simple semicircular anterior plate, weakly protruding, posteriorly not indented medially; posterior plate short and simple, without median division. Internal genitalia ( Fig. 11C, D ) very simple, apparently without pore plates; membranous bilobed structure with short median process, covered by anterior epigynal plate (not by posterior epigynal plate as in South American congeners).