Lepidocyrtus (Setogaster) nigrofasciatus Womersley, 1934

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 : 109-112

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.5628581

persistent identifier

https://treatment.plazi.org/id/03F787EF-E019-FFE1-119C-FC620DD6FAD0

treatment provided by

Plazi

scientific name

Lepidocyrtus (Setogaster) nigrofasciatus Womersley, 1934
status

comb. nov.

Lepidocyrtus (Setogaster) nigrofasciatus Womersley, 1934 comb. nov.

Figs 1 –2 View FIGURES 1 – 8 , 9–33 View FIGURES 9 – 15 View FIGURES 16 – 18 View FIGURES 19 – 21 View FIGURES 22 – 24 View FIGURES 25 – 26 View FIGURES 27 – 33 , 49 View FIGURE 49 , Tabs 2–3

Material examined. Holotype, ( SAM I 22550 View Materials ), SOUTH AUSTRALIA, Mt Osmond, 34.9584 S 138.66637 E, in moss, 6.vi. 1934, H. Womersley; two ‘cotypes’ ( SAM I 22552 View Materials -a, I 22552 View Materials -b), VICTORIA, Kalorama, Mt. Dandenong, 37.833878 S 145.368247 E, 17.v. 1932, J.W. Rath; two paratypes ( SAM I 22551 View Materials and I 22554 View Materials ), same data as holotype. All slides deposited at SAM.

Other material. Three specimens, VICTORIA, Yarra Ranges National Park, 37.50687 S 145.77692 E, The Beeches, Lady Talbot Drive, in moss, 15.v. 2009, G. Perdomo (sample LP 309); three specimens, SOUTH AUSTRALIA, Mt Bold, 35.120206 S 138.705340 E, 4.v. 1975, P. Greenslade (sample LP 323); two specimens, Belair National Park, Mt Lofty Ranges, 35.00063 S 138.64327 E, 309 m asl, 29.vii. 2014, P. Greenslade (sample LP 378). All specimens deposited at University of Barcelona.

Description. Adult body length (without head and furca) 0.7 –1.0 mm. Mesothorax not projecting over head. Body dorsoventrally compressed with dark blue pigment present on th.II to abd.III, dispersed spots on dorsal and ventral head, ant.I–IV, and on coxae and trochanters of three pair of legs ( Fig. 1 View FIGURES 1 – 8 ); several specimens with diffuse pigment (or absent) from th.II to abd.II ( Fig. 2 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 ( Fig. 9 View FIGURES 9 – 15 ). Ant.III organ composed of two subcylindrical sensory rods partially covered by integumentary fold ( Fig. 10 View FIGURES 9 – 15 ). Ant.IV with subapical chaeta of mushroom-shaped named here “T-chaeta” ( 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. Closed inverted V-shaped labral apical intrusion; labral papillae smooth ( Fig. 12 View FIGURES 9 – 15 ). Lateral process ( sensu Fjellberg 1999 ) of outer labial papilla short, tip not reaching apex of papilla ( Fig. 13 View FIGURES 9 – 15 ). Maxillary palp outer lobe with two subequal smooth chaetae and three smooth sublobal appendages ( Fig. 14 View FIGURES 9 – 15 ). Labial anterior row formed by five smooth chaetae (a 1 –a 5); posterior row formed by ciliated chaetae with formula 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 ( Fig. 15 View FIGURES 9 – 15 ).

Dorsal macrochaetae formula such as AoA 2 s A 2 A 4 M 2 /00/01 *00+ 3 ( Figs 16–17 View FIGURES 16 – 18 ). Interocular chaetotaxy with ciliated chaetae s, t, p, and 2–4 scales ( Fig. 18 View FIGURES 16 – 18 ). Eyes G and H small and difficult to see on the slides. Th.II–III and abd.I dorsal chaetotaxy as in Figs 19–21 View FIGURES 19 – 21 . Abd.II chaetotaxy as in Fig. 22 View FIGURES 22 – 24 ; chaetae ml and a 2 p absent; chaetae mi, a 2, lm and ll fan-shaped; chaeta m 3 short, ciliated macrochaeta (chaeta marked with * in dorsal macrochetae formula); m 5 mesochaeta. Abd.III chaetotaxy as in Fig. 23 View FIGURES 22 – 24 ; chaeta d 3 absent; chaetae mi, ml, a 2, li,lm,ll,a 6,im and em fan-shaped, of which a 6 and li larger (paddle-like); chaeta am 6 strongly ciliated and thicker than other mesochaetae; d 2 microchaeta; p 6 and pm 6 broad ciliated macrochaetae; m 7 a and p 8 p thin ciliated macrochaetae; with lateral tuft of ± 100 long ciliated filaments ( Fig. 24 View FIGURES 22 – 24 ). Abd.IV chaetotaxy as in Fig. 25 View FIGURES 25 – 26 ; bothriotrichum T 2 without accessory chaeta s; chaetae m, D 1, pi and pe fan-shaped, from which m and D 1 larger (paddle-like); chaeta a bilobed-fan-shaped ( Fig. 26 View FIGURES 25 – 26 ); C 1 mesochaeta; macrochaeta B 6 with socket of minor diameter than macrochaetae B 4 and B 5; with seven dorsal long S-chaetae (S-chaetae are smooth, slightly blunt and more translucent under light microscope than normal chaetae, see Zhang & Deharveng 2014); with two lateral pseudopori located external to chaetae r 4 –r 5.

Ventral tube without scales; 7 + 7 ciliated chaetae on anterior side ( Fig. 27 View FIGURES 27 – 33 ); all chaetae on posterior side ciliated; each lateral flap with maximum of 5 ciliated chaetae and 5 smooth chaetae ( Fig. 28 View FIGURES 27 – 33 ).

Legs without scales. V shaped trochanteral organ (leg III) with maximum of 14 smooth straight chaetae arranged in triangular shape ( Fig. 29 View FIGURES 27 – 33 ). Unguis with well-developed basal pair of teeth at 36 % from base of the inner edge, and with two small inner teeth at 71 % and 89 % from base of inner edge respectively; unguiculus truncate and with apically serrated outer margin; spatulate tibiotarsal tenent hair ( Fig. 30 View FIGURES 27 – 33 ). Manubrium without scales on dorsal surface; dentes with small, rounded basal tubercle ( Fig. 31 View FIGURES 27 – 33 ); mucronal basal spine with spinelet ( Fig. 32 View FIGURES 27 – 33 ); manubrial plate with two pseudopori, 2 inner chaetae, and 2–3 outer chaetae ( Fig. 33 View FIGURES 27 – 33 ).

Discussion. The presence of small rounded dental tubercle and spinelet on the basal mucronal spine permit to assign this species to the subgenus Setogaster.

SAM

South African Museum