Atelomastix tigrina Edward & Harvey 2010, sp. nov.

Figs. 3, 5, 73, 132–135.

Type material: AUSTRALIA: Western Australia: holotype male, The Cascades, Bluff Knoll, Stirling Range National Park, 34°22’32”S, 118°14’33”E, hand collected, 6 April 2004, M.S. Harvey, J.M. Waldock, K.L. Edward, C. Poustie, A. Danks (WAM T 74312). Paratypes: Stirling Range National Park: 1 male, collected with holotype (WAM T 74311); 1 male, 2 females, collected with holotype (WAM T 69440).

Other material examined: AUSTRALIA: Western Australia: 6 males, The Cascades, Bluff Knoll, Stirling Range National Park, 34°22’29”S, 118°14’17”E, wet pitfall traps, 29 April 1996, M.S. Harvey, J.M. Waldock, B.Y. Main (WAM T 47928); 1 male, The Cascades, Bluff Knoll, Stirling Range National Park, 34°22’29”S, 118°14’17”E, wet pitfall traps, 4 August 1996, M.S. Harvey, J.M. Waldock, B.Y. Main (WAM T 47929); 1 male, 2 females, south of Pyungoorup Peak, Stirling Range National Park, 34°21’59”S, 118°19’44”E, hand collection, 18 March 2005, M.S. Harvey, J.M. Waldock, K.L. Edward, S. Comer (WAM T 72776); 4 males, Pyungoorup Peak, south face, Stirling Range National Park, 34°22’17”S, 118°19’20”E, wet pitfall traps, 4 August 1996, M.S. Harvey, J.M. Waldock, B.Y. Main (WAM T47930, T74313); 7 males, Pyungoorup Peak, south face, Stirling Range National Park, 34°22’17”S, 118°19’20”E, wet pitfall traps, 27 April 1996, M.S. Harvey, J.M. Waldock, B.Y. Main (WAM T47927, T74314); 1 male, 1 female, Stirling Range National Park, base of Pyongurup Peak, 34°21’54"S, 118°19’44"E, 5 August 2008, sifting leaf litter, M.G. Rix, M.S. Harvey (WAM T54248, T54249); 3 females, Stirling Range National Park, base of Pyongurup Peak, 34°22’01"S, 118°19’48"E, 5 August 2008, from ground, litter, M.G. Rix, M.S. Harvey (WAM T 54250).

Etymology: This large, distinctive species is named for the distinctive black and yellow body stripes (tigrinus, Latin, of tigers).

Diagnosis: Specimens of Atelomastix tigrina are large (body width greater than 2.5 mm, and length 42–61 mm) and, when alive, have a very striking colour pattern of black or dark brown with bright yellow-orange bands, similar to A. julianneae. This species can be distinguished by the distinctly angular shaped sclerite b and very elongate basal process that extends behind the main process of the male gonopod. Sclerite c is not bifurcate, is relatively straight, and shorter than sclerite b.

Description: Male (holotype). Colour (Fig. 3): live specimens with black to dark brown segments, head and legs with bright yellow-orange bands; prozonites dark brown, metazonites brown to bright yellow-orange in preserved specimens.

Body: ca. 56 mm long and ca. 3 mm wide at collum. With 65 trunk segments, 117 pairs of legs, last 2 segments without legs.

Head: with ca. 46 ocelli (Fig. 73), arranged in 6 rows (3: 6: 7: 10: 8: 11).

Gonopods: anterior gonopods (Figs. 132–135) heavily sclerotised, 2.7 times longer than broad; sclerite a with swollen base that forms broad, curved distal hood; upper distal face of sclerite a with 18–20 (n=3) short blunt setae; pseudoflagellum short, broad, and entirely visible on externo-lateral side of gonopod but not visible on interno-lateral side, where it is concealed within distal hood; sclerite b broad, angular, forming a blunt tip distally, with 4 erect setae (n=3) on sub-distal edge; basal process of sclerite b very long and elongate, 0.16 times the length of the main process; sclerite c shorter than sclerite b, not bifurcate, tapering to blunt tip, with 1–3 medial seta and 7–9 setae sub-distally on broad internal face (n=3); one sub-basal setae present where sclerites overlap and group of 13 short setae sub-basally on sclerite c; posterior gonopods inconspicuous, small, with several small setae on interno-lateral face of each gonopod.

Dimensions (mm): holotype male (paratype male, WAM T74311): length ca. 56 (61), width ca. 3 (3), L/ W=18.7 (20.3); sclerite a 1.656 / 0.608 (1.704 / 0.694), setae 18 (20); sclerite b 0.701 (0.733), basal process of sclerite b 0.264 (0.288), setae 4 (4); sclerite c 1.088 (1.184), setae 1+9 (3+7).

Female. Similar to male, other than sexual characters, and slightly larger.

Distribution and habitat: This species is only known from The Cascades at Bluff Knoll and the south face of Pyungoorup Peak in Stirling Range National Park (Fig. 5). The surrounding vegetation is dominated by sparsely growing jarrah (Eucalyptus marginata) and marri (Corymbia calophylla).