3584 Author Michat, Mariano C. Author Alarie, Yves Author Watts, Chris H. S. text Zootaxa 2012 2012-12-13 3584 1 1 110 http://dx.doi.org/10.11646/zootaxa.3584.1.1 journal article 10.11646/zootaxa.3584.1.1 1175­5334 10096816 072032C4-63FC-499A-A61D-58B428051302 Limbodessus leysi Watts & Humphreys, 2006 ( Figs 89 –106) Source of material. One specimen of instar I and three of instar III were used for the description ( Table 1 ). Larvae were collected in association with adults at the following localities: Australia , Carey palaeovalley , Mt Morgan calcrete, Mt Weld Station , PB 1, BES 11816, 28.73439S , 122.14942E , 30–IX–2004 , coll. W. F. Humphreys and S. J. B. Cooper ; Mt Morgan calcrete, Mt Weld Station , PB 4, BES 10581, 28.72177S , 122.1569E , 30–IX–2004 , coll. W. F. Humphreys and S. J. B. Cooper. Diagnosis (instar III). Medium-sized species (HL 0.55–1.15 mm ); head (Fig. 103) subpentagonal; nasale subtriangular; half-circle of dense spinulae on lateroventral margins of nasale present; hole-like structure on ventrodistal surface of nasale absent; lateral margins of nasale inflated in dorsal view; lateral branches of nasale minute; slender spinulae anterior to seta FR13 scarce (20 or less); occipital foramen well developed (HW/OCW less than 1.90); occipital suture present; lateral margins of parietal straight; secondary spiniform setae on lateral margins of parietal scarce; seta AN2 present; distal half of MN broad; setae LA3, LA4, LA5 and LA8 hair-like; secondary setae on U absent (Fig. 106). Instar I ( Figs 89 –102). Head ( Figs 89–97 ). Cephalic capsule strongly elongate (HL/HW more than 1.55); seta PA3 inserted far from setae PA1 and PA2; A3 more than 2.80 times longer than A1; A3 more than 2.25 times longer than A2; MP2 1.55–1.85 times longer than MP1; MP2 1.95–2.65 times longer than MP3; LP2 1.40–2.00 times longer than LP1. Legs (Figs 98–99). L3 less than 2.85 times longer than HW. Abdomen (Figs 100–102). U more than 3.75 times longer than LAS; U more than 2.45 times longer than HW; U1 1.10–1.40 times longer than U2. Chaetotaxy. Frontoclypeus with 12 lamellae clypeales; additional setae on U absent. Measurements and ratios that characterize the body shape are shown in Table 2 . Instar II. Not available. Instar III (Figs 103–106). Head (Fig. 103). A3 less than 2.25 times longer than A1; A3 less than 1.45 times longer than A2; MN less than 4.85 times longer than broad; MP less than 1.75 times longer than labial palpus; MP2 2.10–3.10 times longer than MP3; LP2 more than 0.65 times as long as LP1. Legs (Figs 104–105). L3 2.25–2.85 times longer than HW. Abdomen (Fig. 106). U 2.40–3.10 times longer than LAS; U 1.55–2.25 times longer than HW; U1 0.70–1.40 times as long as U2. Chaetotaxy. Anteroventral margin of nasale with 48 lamellae clypeales distributed in 2 rows; pro- and mesoCO without anterior secondary setae; pro-, meso- and metaCO without posterior secondary setae; proCO with less than 11 secondary setae; metaCO with less than 20 secondary setae; anterodorsal secondary setae on pro- and metaFE present; metaFE with less than 12 anteroventral secondary setae; posterodorsal secondary setae on meso- and metaFE absent; metaFE with 9–27 secondary setae; anterodorsal secondary setae on proTI absent; anteroventral and posterodorsal secondary setae on proTI present; mesoTI with less than 4 anteroventral secondary setae; metaTI with less than 9 anteroventral secondary setae; metaTI with less posterodorsal secondary setae on meso- and metaTA present; proTA with 1–7 secondary setae; mesoTA with less than 7 secondary setae; metaTA with less than 16 secondary setae; secondary setae on U absent. Measurements and ratios that characterize the body shape are shown in Table 10 . Secondary leg setation detailed in Table 18 . FIGURES 89–97. Limbodessus leysi , first-instar larva. 89, cephalic capsule, dorsal aspect; 90, cephalic capsule, ventral aspect; Remarks. Limbodessus leysi belongs to the group of species characterized by the absence of secondary setae on the urogomphus ( L. challaensis , L. exilis , L. fridaywellensis , L. hillviewensis , L. hinkleri , L. masonensis , L. millbilliensis , L. morgani , L. ordinarius , L. pulpa , L. raeae , L. windarraensis , L. yuinmeryensis ) (Fig. 106). Compared to other members of this group, the larvae of L. leysi can readily be distinguished by the following combinations of characters: lateral margins of the nasale inflated in dorsal view, bearing a half-circle of dense spinulae ( Figs 90 , 103), and primary seta AN2 present.