Lepidocyrtus (Setogaster) praecisus Schött, 1917,

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 : 112-115

publication ID

https://dx.doi.org/10.11646/zootaxa.4044.1.6

publication LSID

lsid:zoobank.org:pub:80A698E3-7ADF-4ECD-8F8E-12B57530C682

DOI

https://doi.org/10.5281/zenodo.5628583

persistent identifier

https://treatment.plazi.org/id/03F787EF-E01A-FFEC-119C-FA4E0B1CF962

treatment provided by

Plazi

scientific name

Lepidocyrtus (Setogaster) praecisus Schött, 1917
status

comb. nov.

Lepidocyrtus (Setogaster) praecisus Schött, 1917 comb. nov.

Figs 3 View FIGURES 1 – 8 , 34–35 View FIGURES 34 – 35 , 49 View FIGURE 49 , Tabs 2–3

Type material. Three lectotypes mounted on one slide and deposited at the Swedish Museum of Natural History (slide code NHRS-GULI000023339). QUEENSLAND, “Cedar Creek”, Ravenshoe, 17.645940 S 145.509228 E, 947 m asl, 1917, Mjöberg expedition, Riksmusset, Stockholm, Sweden.

Other material examined. Two specimens deposited at SAM, WESTERN AUSTRALIA, Government Gardens, Perth, 31.957542 S 115.862231 E, 5 m asl, 10.ii. 1931, H. Womersley (slide codes SAM 001 and SAM 002); one specimen deposited at SAM, VICTORIA, You Yang Mts, 142 m asl., 24.ix. 1931, J.W. Rath (slide code SAM 003); one specimen deposited at SAM, SOUTH AUSTRALIA, Adelaide, 124 m asl, 1929, D.S. Swan (slide code SAM 030); one specimen deposited at SAM, Mt Osmond, 34.9584 S 138.66637 E, 342 m asl, 19.vii. 2005, P. Greenslade (slide code PG 2); one specimen deposited at SAM, Kangaroo Is, 35.775131 S 137.214674 E, June 2010, 201 m asl, P. Greenslade, M. Stevens (slide code PG 1); three specimens deposited at University of Barcelona, Mt Lofty Ranges, Belair National Park, Pines oval, 35.004984 S 138.639130 E, 268 m asl, 9.vii. 1978, P. Greenslade (sample LP 311).

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 View FIGURES 1 – 8 ); 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 View FIGURES 9 – 15 ); 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 M 1 M 2 R*EL 1 L 2; chaeta M 1 a little shorter than M 2; chaeta R half in length of M 2, E, L 1 and L 2 chaetae (marked with *); ventral cephalic groove with 3 + 3 ciliated chaetae.

Dorsal macrochaetae formula such as AoA 2 s A 2 A 4 M 2 /00/01 *00+ 3; abd.II chaeta m 3 short ciliated macrochaeta (chaeta marked with * in dorsal macrochaetae formula). The general dorsal chaetotaxy the same as for S. nigrofasciatus (see Figs 16–26 View FIGURES 16 – 18 View FIGURES 19 – 21 View FIGURES 22 – 24 View FIGURES 25 – 26 ); chaetae F 2 and F 3 on abd.IV are mesochaetae (instead of macrochaetae as in L. (S.) nigrofasciatus ) ( Fig. 34 View FIGURES 34 – 35 ). Three specimens (slide codes SAM 001, SAM 002, SAM 003, 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 View FIGURES 34 – 35 ). One specimen (SAM-003) with empodial appendages of three legs pointed instead of truncate.

Discussion. On the three lectotype specimens the chaetotaxy are practically invisible; but five important characters are distinguishable: presence of subapical T-chaeta on ant.IV, dorsal cephalic macrochaetotaxy as AoA 2 s A 2 A 4 M 2, presence of lateral tuft of filaments on abd.III, distance between bothriotricha T 2 and T 4 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, nigrofasciatus and praecisus are similar species. The only chaetotaxic difference is that chaetae F 2 and F 3 of abd.IV is a macrochaetae in nigrofasciatus and a mesochaetae in praecisus .

SAM

South African Museum