Towards understanding Lepidocyrtus Bourlet, 1839 (Collembola, Entomobryidae) I: diagnosis of the subgenus Setogaster, new records and redescriptions of species Mateos, Eduardo Greenslade, Penelope Zootaxa 2015 4044 1 105 129 Schott, 1917 Schott 1917 [151,741,1453,1479] Entognatha Entomobryidae Lepidocyrtus Animalia Collembola 7 112 Arthropoda species praecisus comb. nov. Setogaster    Typematerial.Three lectotypesmounted on one slide and deposited at the Swedish Museum of Natural History (slide code NHRS-GULI000023339). QUEENSLAND, “Cedar Creek”, Ravenshoe, 17.645940S 145.509228E, 947 masl, 1917, Mjöberg expedition, Riksmusset, Stockholm, Sweden.  Other material examined.Two specimens deposited at SAM, WESTERN AUSTRALIA, Government Gardens, Perth, 31.957542S 115.862231E, 5 masl, 10.ii.1931, H. Womersley (slide codes SAM001 and SAM002); one specimen deposited at SAM, VICTORIA, You Yang Mts, 142 masl., 24.ix.1931, J.W. Rath (slide code SAM003); one specimen deposited at SAM, SOUTH  AUSTRALIA, Adelaide, 124 masl, 1929, D.S. Swan (slide code SAM030); one specimen deposited at SAM, Mt Osmond, 34.9584S 138.66637E, 342 masl, 19.vii.2005, P. Greenslade (slide code PG2); one specimen deposited at SAM, Kangaroo Is, 35.775131S 137.214674E, June 2010, 201 m asl, P. Greenslade, M. Stevens (slide code PG1); three specimens deposited at University of Barcelona, Mt Lofty Ranges, Belair National Park, Pines oval, 35.004984S 138.639130E, 268 masl, 9.vii.1978, P. Greenslade (sample LP311).   Description.Adult body length (without head and furca) 1.0– 1.4 mm. Mesothorax not projecting over the head. Body dorsoventrally compressed with light blue pigment present on head, thorax and abdomen ( Fig. 3); densely black pigmented ocular areas. Antenna without scales. Basis of ant.I dorsally and ventrally with three microchaetae arranged in triangle. Ant.III organ composed of two subcylindrical sensory rods partially covered by an integumentary fold. Ant.IV with a subapical T-chaeta (see Fig. 11); without apical bulb. Ciliated prelabral chaetae and smooth labral chaetae in typical number 4/5,5,4; chaetae of apical row thicker than those in other rows. Nearly closed inverted V-shaped labral apical intrusion; labral papillae smooth. Lateral process (  sensu Fjellberg 1999) of outer labial papilla short, tip not reaching the apex of papilla. Maxillary palp outer lobe with two subequal smooth chaetae and 3–4 smooth sublobal hairs. Labial chaetotaxy M1M2R*EL1L2; chaeta M1 a little shorter than M2; chaeta R half in length of M2, E, L1 and L2 chaetae (marked with *); ventral cephalic groove with 3+3 ciliated chaetae. Dorsal macrochaetae formula such as AoA2s A2A4M 2/00/01*00+3; abd.II chaeta m3 short ciliated macrochaeta (chaeta marked with * in dorsal macrochaetae formula). The general dorsal chaetotaxy the same as for  S. nigrofasciatus(see Figs 16–26); chaetae F2 and F3 on abd.IV are mesochaetae (instead of macrochaetae as in  L. (S.) nigrofasciatus) ( Fig. 34). Three specimens (slide codes SAM001, SAM002, SAM003, determined by Womersley as  L. praecisus) lacking lateral tuft of filaments on abd.III. Legs, trochanteral organ, unguis, ventral tube, and furca as  S. nigrofasciatus, but unguis basal teeth less developed ( Fig. 35). One specimen (SAM-003) with empodial appendages of three legs pointed instead of truncate.   Discussion.On the three lectotypespecimens the chaetotaxy are practically invisible; but five important characters are distinguishable: presence of subapical T-chaeta on ant.IV, dorsal cephalic macrochaetotaxy as AoA2s A2A4M2, presence of lateral tuft of filaments on abd.III, distance between bothriotricha T2 and T4 on abd.IV, and presence of spinelet on basal mucronal spine. The presence of a small rounded dental tubercle and spinelet on the basal mucronal spine allow this species to be placed in the subgenus Setogaster. Apart from the colour pattern and body size,  nigrofasciatusand  praecisusare similar species. The only chaetotaxic difference is that chaetae F2 and F3 of abd.IV is a macrochaetae in  nigrofasciatusand a mesochaetae in  praecisus.