Entomobrya niger, Jordana & Greenslade, 2020

Jordana, Rafael & Greenslade, Penelope, 2020, Biogeographical and ecological insights from Australasian faunas: the megadiverse collembolan genus, Entomobrya (Entomobryidae), Zootaxa 4770 (1), pp. 1-104: 54-55

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Entomobrya niger

comb. nov.

Entomobrya niger   comb. nov.

( Figs 2K View FIGURE 2 , 5E View FIGURE 5 , 28 View FIGURE 28 A–G)

Syn. Entomobrya virgata v. nigrella Womersley, 1934   , nec. Latzel, 1917–18. Stat. nov.

Holotype. Female, SA, Waterfall Gully, - 34.9600°S, 138.6760°E, 300m asl, May 1934, HW leg. [ SAMA]. GoogleMaps  

Other material examined. Two females, two slides and 4 in ethyl alcohol, NSW, Barrengarry, Kangaroo Valley, - 34.683333°S, 150.516667°E 360m asl, sweeping plants, 2003, PG leg., SAMA; female, 1 km N of Barrengarry, 500m asl, beating bushes, 10.iv.1991, PG leg GoogleMaps   .

Redescription. Size. Length 1.570 and 2.180 mm (2 females).

Colour. Dorsally whitish orange to whitish with some dark blue transversal bands from whole Th III to dorsal half Abd III, and of posterior half of Abd IV; Head, Th II, Abd V and VI orange. ( Figs 2K View FIGURE 2 , 5E View FIGURE 5 ). Ant. III and IV blue, darker trough the tip.

Head. Total Ant length 0.720 –0.870 mm, Ant /head ratio=2.2 Body 1.570 –2.180 mm, Ant Org. III with the middle papilla short and rod–like ( Fig. 28B View FIGURE 28 ). Apical bulb of antennal segment IV bilobed. Labral papillae smooth and conical ( Fig. 28A View FIGURE 28 ). Prelabral and labral chaetae 4/554, prelabral chaetae ciliated, labral chaetae smooth. Lateral process of Papilla E reaching the papilla tip. Posterior row with MEL 1 View Materials L 2 ciliated chaetae, R not seen. Eyes G and H smaller than E and F. Ant / head ratio=2.2. Measurements: Ant I–IV 100–130, 200–260, 180–210 and 240–270 in µm respectively GoogleMaps   .

Thorax and abdomen. Abd IV/III=2.9–3.5. Manubrium (280–260), dens (500–365)= 0.780–625 mm. Three manubrial chaetae and two pseudopores on manubrial plate. Trochanteral organ with 12 chaetae. Unguis slender ( Fig. 28G View FIGURE 28 ) with 4 inner teeth; paired teeth located approximately 30–37% of inner unguis length, dorsal tooth in and intermediate position, 2 unpaired teeth on the internal edge of the unguis, unguiculus smooth external edge. Tenent hair expanded at its tip. Mucronal teeth normal.

Chaetotaxy. Formula: 3,1,0,1,1a/1,4/1,2/0,0,1/0,0,2,2,2. Head ( Fig. 28C View FIGURE 28 ) with An 2, An 3a1 and An 3 on H1 area, with A 5 on H2 area; only two Mc on M row M 2 an M 4. Sutural row with S 0, S 2, S 3, S 4 and S 5 and P s5. Thoracic chaetotaxy T1 area on Th II with one Mc (m 2), T2 area with four Mc a 5, m 4, m 4i and m 5 ( Fig. 28D View FIGURE 28 ). Abdominal chaetotaxy ( Fig. 28E View FIGURE 28 ) reduced. Abd 2 with a 3 Mc m 3 and m 3e. Abd. III with m 3 Mc. Abd. IV with 6 central posterior Mc A 4 –A 6, B 5, B 6, and C 2a ( Fig. 28F View FIGURE 28 ).

Remarks. Womersley described Entomobrya virgata Schött var. nigrella   var. nov. in 1934 stating: “This variety differs   from the typical form only in that the pigment is continuous between the bands on metanotum and third abdominal segment. A single specimen was collected from moss at Waterfall Gully, South Australia, in May, 1934 (R.V. S.). The name is preoccupied by Latzel, R, 1917:242, for E. arvensis var. nigrella   .

The type from Waterfall Gully, S. A. May 1934 has been checked. It is totally cleared, and so not possible to see the chaetotaxy. In the collection of P. Greenslade were 6 specimens, four in ethyl alcohol, and two mounted on a slide, one of them cleared, they are coincident with this colour and we give the following description.

Entomobrya herbacea   sp. nov. described above, has a unique chaetotaxic formula with only slight differences to any other species in the genus. Entomobrya herbacea   sp. nov. has S 0, S 2, S 3,S 4i, S 4, S 5i and S 5 and four Mc M on the head and B 3 instead of C 2a on Abd IV, while E. niger   com. nov. lacks S 4i and S 5i and has only M 1 an M 4 Mc on the head. These species also differ in colour. See remarks for E. herbacea   sp. nov. This species is not common and most records are from shrubs.

Etymology. The species name refers to the colour and name given by Womersley.


Museum national d'Histoire Naturelle, Laboratiore de Paleontologie


South Australia Museum


Royal Botanic Gardens, National Herbarium of New South Wales


Departamento de Geologia, Universidad de Chile