Synthetonychia obtusa
Synthetonychia obtusa Forster-1954
Synthetonychia obtusa Forster, 1954 (from original description)









Synthetonychia obtusa Forster, 1954 belongs to the genus Synthetonychia (Laniatores:Synthetonychiidae).



  • S.o. male(1) (holotype): Dominion Museum, Wellington; 2/883[1]


(from Forster, 1954[1])

  • Color: Yellowish-brown with faint black shading.
  • Body: Scute finely granulate. The eyes are separated from the anterior margin by a distance which is equal to 2/5 of the total length of the scute, separated from each other by a distance equal to 2x their diameter. Genital operculum narrowing postero-anteriorly but widening distally to form a pair of disto-lateral lobes, width at base equal to ½ of length (Fig. 759).
  • Genitalia: (Fig. 758). Aedeagus long and tubular, with 2 strong spines rising from sockets on the ventral surface near the base and a further 2 spinous processes on the dorsal surface at about 1/3 followed by 2 strong setae. Dorsal and ventral plates absent.
  • Chelicerae: Typical
  • Pedipalls: (Fig 756). The trochanter is provided with a strong horn-like process on the mid-dorsal surface which is equal in length to the trochanger and with 2 smaller processes, one disto-dorsal in position, and one on the distal retro-lateral surface (Fig. 757). There is a strong lobe on the ventral surface of the femur at 1/5 of its length which extends to the retro-lateral surface, and a small conical tubercle on the proximo-dorsal surface. The disto-dorsal process of the tibia is well developed, becoming wider anteriorly where it is terminated abruptly. The tarsal segment is slender and slightly sinuous,tarsal spine strong,equal in length to the tarsal claw.
  • Legs: Smooth, arpart from a few small setose tubercles on the femora. Tarsal formula Tarsal claws of legs 3 and 4 as shown in Fig. 760, median branch short, arolium strongly developed.
  • Measurements (mm): Scute: 1.28x1.20; Legs: 2.57, 3.52, 2.72, 3.72; Pedipalp: 2.25; Chelicera: 0.74


  • female unknown[1]
  • Location: Grove Track, near Picton, New Zealand (South Island)[1]


  • Forster, 1954:286[1]
  • World Checklist[2]

Additional images - GalleryEdit


  1. 1.0 1.1 1.2 1.3 1.4 1.5 Forster, R.R. (1954) The New Zealand harvestmen (sub-order Laniatores). Canterbury Museum bulletin, Christchurch, 2, 1–329.
  2. Kury AB, Mendes AC & Souza DR (2014) World Checklist of Opiliones species (Arachnida). Part 1: Laniatores – Travunioidea and Triaenonychoidea. Biodiversity Data Journal 2: e4094. doi: 10.3897/BDJ.2.e4094

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