Xyphinus xelo Deeleman-Reinhold, 1987

(Figs 22–25; map 2)

Type material. Male holotype and female paratype, MALAYSIA: Kuala Lumpur, Templer’s Park, in leaflitter on slope, 29.III.1980, RMNH , not examined. 3 male and 3 female paratypes (PBI _ OON 00031954), same locality as holotype, 21.III.1985, in litter on slope, coll. C.L. and P. R . Deeleman, RMNH .

Additional material examined. MALAYSIA: 3 males (PBI _ OON 00031948), Kuala Lumpur, Templer’s Park, 3.XII.1990, leg. C.L. and P. R . Deeleman, RMNH . Perak, 2 males (PBI _ OON 00032291), Cameron Highlands, Batu (=milestone) 19 village, N 4°22.2', E 101°20.0', 590 m, sifting leaf litter & rotten wood, 30.IV.–7. V .2009, leg. P. Banar, MHNG. Rain forest NE of Chenderiang , 1 male & 5 females (PBI _ OON 00015294), 290–330 m, 22.–31.I.1994, leg. P. Schwendinger, MHNG . 3 males & 1 female (PBI _ OON 00015547), 330–400 m, 15.–22.I.1995, leg. P. Schwendinger, MHNG . 1 female (PBI _ OON 00012066), Selangor, Ulu Gombak, Univ. of Malaya field center, secondary forest along river, 200 m, 26.IX.1991, leg D. Agosti, MHNG . 1 male (PBI _ OON 00032241), Pahang, Cameron Highlands, Tanah Rata, Gunung Jasar, N 4°28.4 –7', E 101°21.6 –22.1', 1470–1700 m, sifting leaf litter, 18.IV.–11. V .2009, leg. P. Banar, MHNG.

Diagnosis. With its pits on the carapace X. xelo resembles X. hystrix, but lacks the large spikes on the carapace. From other Xyphinus species X. xelo can be distinguished by the male palp, which is rather simple and similar to the palp of X. hystrix, but lacks the bifid apophysis (Figs 22F, G; 2A–C). The female epigastric area is slightly protruding and shows a very short triangle-shaped structure (Figs 24G, 25A–D).

Description. Male. Total length 1.70 mm. Carapace: Orange-brown, ovoid in dorsal view, strongly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, with angular posterolateral corners, posterolateral edge with a pair of pits, anterolateral corners without projections, posterolateral surface with one pair of spikes (Fig. 22A–C), surface of pars cephalica and sides smooth, fovea absent. Lateral margin with blunt denticles. Posterior margin with four lobate impressions, situated underneath the pits. Clypeus: Straight in frontal view, vertical in lateral view, high, ALE separated from edge of carapace by their radius or more (Fig. 22D). Eyes: PME largest, all eyes oval. Posterior eye row straight from above, procurved from front. ALE separated by their radius to diameter, ALE and PLE touching, PLE and PME touching, PME touching (Fig. 22A, D). Sternum: Longer than wide, sickle-shaped structures not touching, but elongated fan-like anteriorly (Fig. 22B). Radial furrows opposite coxae III appearing as sclerotized impressions, elongated fan-like anteriorly (Fig. 22B). Surface smooth. Mouthparts: Chelicerae slightly divergent, with swelling on anterior face, setae evenly scattered (Fig. 22D). Labium rectangular, indented at middle, with 3-5 setae on anterior margin. Abdomen: Book-lung covers elliptical. Scuto-pedicel region with paired curved scutal ridges. Dorsal scutum orange brown, middle surface and sides smooth, anterior half without projecting denticles. Epigastric scutum not protruding. Postepigastric scutum with short posteriorly directed lateral apodemes (Fig. 22B). Posterior spiracles connected by groove. Legs: Tibia with three, metatarsi with one trichobothria each. Harpoon-like hairs covering the distal part of metatarsi III and IV (Fig. 22E, arrow). Genitalia: Sperm pore small, situated in front of anterior spiracles. Trochanter normal size, unmodified. Femur one to two times as long as trochanter, attaching to patella subbasally; patella shorter than femur, tibia two times as long as patella, with two long and thick setae prolaterally, with three trichobothria (Figs 22F; 23A). Cymbium pale orange, ovoid in dorsal view, fused with bulb, but with clearly defined seam between, bulb pale-orange, 1 to 1.5 times as long as cymbium, with several dark, rather short apophyses. Thin membranous outgrowth dorsally, dark plate ventrally (Figs 22F, G; 23A–C).

Female. Total length 1.75 mm. Mouthparts: Chelicerae anterior face unmodified. Female palp spineless, femora with two spine-like hairs ventrally, tibia with three trichobothria and few stronger setae prolaterally (Fig. 24E). Abdomen: Epigastric scutum sligthly protruding (Fig. 24B, C). Legs: Harpoon-like hairs covering the distal part of metatarsi III and IV (Fig. 24F, arrow). Genitalia: Epigastric furrow narrow. Dark, very short, triangleshaped structure visible, surrounded by half-circle (Figs 24G; 25A–D).