Lepidocyrtus (Setogaster)

Mateos, Eduardo & Greenslade, Penelope, 2015, Towards understanding Lepidocyrtus Bourlet, 1839 (Collembola, Entomobryidae) I: diagnosis of the subgenus Setogaster, new records and redescriptions of species, Zootaxa 4044 (1), pp. 105-129 : 121-122

Lepidocyrtus (Setogaster) spp.

Figs 7–8 , 49 , Tabs 2–3

Diagnosis. Body of moderate size with mesothorax not projecting over head ( Figs 7–8 ); without scales on antennae, legs, ventral tube and dorsal face of the manubrium; ant.IV with a subapical T-chaeta; ciliated prelabral chaetae; labial anterior row formed by five smooth chaetae (a1–a5); posterior row formed by smooth or ciliated chaetae (depending on the specimen); ventral cephalic area with 3+3 ciliated chaetae along cephalic groove; dorsal cephalic chaetae A3 mesochaeta, A4 mesochaeta or macrochaeta depending on specimen; thorax without dorsal macrochaetae; abd.II chaeta a2p absent, chaeta m3 short ciliated macrochaeta, chaeta m5 mesochaeta; abd.III chaetae li and a6 paddle-like (see Fig. 23 ), several specimens with lateral tuft of long ciliated filaments (see Fig. 24 ); abd.IV chaeta C1 mesochaeta, B4–5–6 ciliated macrochaetae, chaetae m, D1, pi and pe fan-shaped, from which m and D1 larger and paddle-like (see Fig. 26 ), chaeta a bilobed-fan-shaped (see Fig. 26 ), with two lateral pseudopori located externally to mesochaetae r4–r5; dentes with short rounded dental tubercle (or without); basal mucronal spine with spinelet.

Material examined. 44 specimens belonging to several species, mounted on slides and deposited at SAM (slide codes SAM 0004, SAM 005, SAM 0007, SAM 008, SAM 009, SAM 010, SAM 011, SAM 012, SAM 013, SAM 014, SAM 015, SAM 016, SAM 017, SAM 019, SAM 020, SAM 022, SAM 023, SAM 024, SAM 025, SAM 026, SAM 027, SAM 028, SAM 029) and University of Barcelona (samples LP307, LP308, LP310, LP312, LP322, LP338, LP340) from a wide range of localities and regions of Australia ( Fig. 49 ) (wheat and cotton fields, native grass, mountain tops, forest, a cave ( NSW), reservoir (VIC), garden (ACT).

Discussion. This group of specimens belong to several different species currently being studied. The presence of small rounded dental tubercle and spinelet on the basal mucronal spine mean that all these specimens can be assigned to the subgenus Setogaster.

Figures

FIGURE 49. Australian localities of Setogaster species. Red circles— Setogaster sp., blue squares S— Setogaster sp., n— Setogaster nigrofasciatus, p— Setogaster praecisus.

FIGURES 1 – 8. Lepidocyrtus (Setogaster) studied. 1 – 2, L. (Setogaster) nigrofasciatus; 3, L. (Setogaster) praecisus; 4, L. (Setogaster) kuakea; 5, L. (Setogaster) fasciatus; 6, L. (Setogaster) coerulea; 7 – 8, L. (Setogaster) spp.

FIGURES 22 – 24. Lepidocyrtus (Setogaster) nigrofasciatus. 22, abd. II complete chaetotaxy (left side), pse—pseudoporus; 23, abd. III complete chaetotaxy (left side), pse—pseudoporus, chaeta d 2 is a ms chaeta sensu Szeptycki (1972), only one filament of lateral tuft of filaments showed, for the other lateral filaments only the sockets are represented; 24, abd. III lateral tuft of filaments.

FIGURES 25 – 26. Lepidocyrtus (Setogaster) nigrofasciatus. 25 a, abd. IV complete chaetotaxy, broad black circles—broad ciliated macrochaetae, small black circles—thin ciliated macrochaetae, open circles— mesochaetae, triangles—fan-shaped chaetae, S—long S-chaetae, as and ps—short S-chaetae, x—bothriotricha, # — pseudoporus; 25 b, abd. IV chaetae morphology, bcm—blunt broad ciliated macrochaeta, tcm—acuminate thin ciliated macrochaeta, m—mesochaeta; 26, abd. IV bothriotrichal complex.