Bioacoustics of Crossopriza johncloudsleyi

Description Male (Lake Bogoria) MEASUREMENTS. Total body length 2.8, carapace width 1.2. Leg 1: 21.0 (6.0 + 0.5 + 5.8 + 7.2 + 1.5), tibia 2: 3.7, tibia 3: 2.7, tibia 4: 3.3; tibia 1 L/d: 50. Distance PME-PME 70 µm, diameter PME 85 µm, distance PME-ALE 35 µm, distance AME-AME 25 µm, diameter AME 85 µm. COLOR. Carapace ochre-yellow, medially slightly darker including ocular area and clypeus, sternum light brown with slightly darker radiating marks, legs ochre-yellow with many small black marks, mostly on femora ( Fig. 28 ) and tibiae, not on coxae, few on metatarsi, abdomen ochre-grey with indistinct small dark and white internal marks dorsally and laterally, ventrally with darker pattern, wider anterior of gonopore. BODY. Habitus as in Figs 28 and 29 ; ocular area elevated, compact, no ‘accessory eyes’ (cf. Huber 2009 ); carapace with thoracic pit; clypeus with pair of distally slightly hooked apophyses on rim, ~140 µm long. Chelicerae as in Fig. 72 , with large frontal apophyses provided with one thick modified hair each and pair of smaller apophyses laterally, some hair bases accompanied by small cuticular elevations, fine stridulatory ridges. Sternum wider than long (0.78/0.50), unmodified. PALPS. As in Figs 70 and 71 , coxa with prominent joint (arrow) and retrolateral hump, trochanter simple, femur with distinct ventral apophysis, tibia very large, procursus curved towards femur, with strong distal apophysis, bulb with only one process (bulbal apophysis) with distinctive prolatero-ventral ridges, sperm duct apparently opening at basis of bulbal apophysis. LEGS. Without curved hairs, few vertical hairs, with spines ventrally on femur 1 (single row on distal half, ~17 spines); retrolateral trichobothrium on tibia 1 at 4%; prolateral trichobothrium absent on tibia 1, present on other tibiae; pseudosegments not visible in dissecting microscope. VARIATION. Tibia 1 in two other males from Kenya: 5.6, 5.7. The holotype is slightly smaller (tibia 1: 4.5), lacks the small proximal apophyses on the chelicerae (arrow in Fig. 72 ), and has a slightly differently shaped palpal femur (ventral projection; see fig. 15 in Deeleman-Reinhold & van Harten 2001 ). Female In general similar to male but femur 1 without spines, clypeus unmodified, chelicerae without stridulatory ridges; tibia 1 in 6 females from Kenya: 4.6-5.2 (mean 4.8); in 3 females from Yemen: 3.4-3.5. Without stridulatory apparatus between prosoma and abdomen. Epigynum with large and complex frontal plate with pair of long lateral apophyses, pair of deep pits, and posterior elevated transversal ridge; simple posterior plate; internal genitalia as in Figs 63 and 74 . Paratypes with slightly smaller epigyna with slightly shorter projections, otherwise identical (also in dorsal view). ALS with only two spigots each.