Entomobrya additae, 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: 17-19

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Entomobrya additae

sp. nov.

Entomobrya additae   sp. nov.

( Figs 1A View FIGURE 1 , 4A View FIGURE 4 , 7 View FIGURE 7 A–H)

Holotype. Female on slide, 16–1, QLD, Lambs Head, 10 km W of Edmonton, 2 nd tower, - 17.023°S, 145.641°E, 1320m asl, pyrethrum spray, logs and trees, 11.xii.1989, G. Monteith, G. Thompson & H. Janetzki leg., [ QLD Mus 16-1]. GoogleMaps  

Paratypes. Five females. Same collection details as holotype but on mossy rock, various dates 1988, 10.xii.1989, [QLDMus 16–1, 16–2, 15–1, 15–2, 22–2].

Other material examined. QLDMus, QLD, Mt Lewis Rd. 16 km from Highway, - 16.571°S, 145.260°E, 900m asl, Dec 1989 to Jan. 1990, G. Monteith & G. Thompson leg GoogleMaps   ; QLD, Pauls Luck , Platypus Creek, 13 km W. Mossman, - 16.447°S, 145.257°E, 1135m asl, moss, Jan. 1990 and 17.x.1981, G. Monteith & Janetzki leg GoogleMaps   ; QLD, 4 km S. of Koombooloomba Dam , - 17.864°S, 145.867°E, 800m asl, rain forest, pitfalls, Dec 1989 to Jan 1990, G. Monteith, G. Thompson & H. Janetzki leg GoogleMaps   ; QLD, O’Reilly’s , Dec 1988, - 30.497°S, 153.138°E, 935m asl PG leg GoogleMaps   .; SAMA, NSW, Styx River , Nothofagus   forest, canopy fogging, various dates in 1990, 1991, - 30.497°S, 152.396°E, 1390m asl; 3 specimens with truncate unguiculus, specimens 2, 3 and 4 GoogleMaps   , QLD, Lamington NP, Oct. 2006, - 30.497°S, 153.138°E, 935 m asl, pitfall, Kitching leg. GoogleMaps   [QLDMus 15–1, QLDMus 15–2, QLDMus 17, QLDMus 22–2].

Description. Size. Length 2.141 mm (n=7)

Colour. Dorsally whitish yellowish with some dark blue bands in anterior and lateral parts of Th II (sometimes with a posterior band), Lateral bands on Th III, Abd I and Abd II, Abd III with lateral longitudinal stripes and a posterior band with or without a posterior triangular central spot, Abd IV with lateral, transverse irregular bands and a narrow stripe on posterior edge. Abd V and VI with lateral spots ( Figs 1A View FIGURE 1 , 4A View FIGURE 4 ). Body some specimens very similar in colour to E. varia   .

Head. The apical bulb of antennal segment IV bilobed. The labral papillae spinulate with one or two spines. Prelabral and labral chaetae 4/554. Prelabral chaetae clearly ciliated, labral chaetae smooth. Labial chaetae with MREL 1 L 2 Ciliated chaetae, R smaller than M. External labial process of papilla E reaching at the papilla end. Eyes G and H small and subequal. Ant / head=2.55 (n=7). Ratio Ant I:II:III:IV=1:2.3:2.0:2.43.

Thorax and abdomen. Trochanteral organ with 17–20 smooth and spiniform chaetae. Unguis ( Figs 7 View FIGURE 7 A–B) with 4 inner teeth; paired teeth located approximately 29% (n=12) of inner unguis length, dorsal tooth basal. Two clear unpaired teeth on the internal edge of the unguis, first one at 66% on unguis 1 and 2, 75% of the basis of unguis 3, unguiculus long in leg 3 and shorter in leg 1, on both legs truncate and with a smooth external edge. Tenent hair expanded distally and longer than the unguis. Manubrial plate with 4 chaetae and 2 pseudopores. Mucro normal. Not ringed part of dens 2 times the mucro.

Chaetotaxy. Dorsal head chaetotaxy at figure 7D; Mc An’ 0, A 6, A 7, S’ 0, S 1, always absent, S 0, S 2, S 4i, S 4 and S 5 present (S 4i present or absent); M 2 and M 4 present; Ps 2 absent, Ps 5 always present. Thoracic chaetotaxy with one Mc (m 1) on T1 area on Th II, T2 area with Mc a 5 and m 4 ( Fig. 7E View FIGURE 7 ). Abdominal chaetotaxy reduced.Abd II with a 2 present only in three specimens from 11, Mc a 3 absent, m 3 and m 3e Mc present Abd III with m 3 ( Fig. 7G View FIGURE 7 ). Abd IV with 12 central and posterior Mc A 3, A 5 –A 6, B 5 –B 6 and E 1 ( Fig. 7H View FIGURE 7 ). Mucro with 16 µ (n=7) as Figure 7C View FIGURE 7 . The chaetotaxy formula: 3,1,0,2(1),1a/1,2/0(1),2/0,0,1/0,2,0,2,2. Trichobothria on Abd IV at T2 and T6 location (0101).

Measurements: Ant I–IV 117, 264, 233, and 272 µm respectively. Abd IV/III=4 (n=7).

Remarks. A number of specimens incorrectly labelled as Entomobrya varia   from different localities were similar in chaetotaxy and were found to be this new species. The new species is common in high altitude locations in northeast Queensland with some material from Nothofagus   rainforest at Styx River in northern NSW. Its colour is similar to that of Type II E. varia Schött, 1917   but it has a truncate unguiculus on all legs, which separates it from Entomobrya varia   . It is also similar to E. peregrina   sp. nov. in that they both have a simplified chaetotaxic formula in some respects. The following Table separates the three species by 12 characters as well as by the colour difference.

Very few Entomobrya   have the truncate unguiculus, a character that is usually associated with halophilic habits. Etymology. The species name signifies yet another new species in the genus.


South Australia Museum


Royal Botanic Gardens, National Herbarium of New South Wales