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

Entomobrya additae sp. nov.

( Figs 1A , 4A , 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].

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 ; 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 ; 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 ; QLD, O’Reilly’s , Dec 1988, - 30.497°S, 153.138°E, 935m asl PG leg .; 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 , QLD, Lamington NP, Oct. 2006, - 30.497°S, 153.138°E, 935 m asl, pitfall, Kitching leg. [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 , 4A ). 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 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 ). 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 ). Abd IV with 12 central and posterior Mc A 3, A 5 –A 6, B 5 –B 6 and E 1 ( Fig. 7H ). Mucro with 16 µ (n=7) as Figure 7C . 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.

Figures

FIGURE 1. Habitus and colour of: A, Entomobrya additae sp. nov.; B, Entomobrya albocincta; C, E. assuta; D, Entomobrya bioblitzi, sp. nov.; E. Entomobrya boreensis, sp. nov.; F, Entomobrya caputovisensis sp. nov.; G–H, Entomobrya charlotteensis sp. nov. 7, male, H, female; I, E. clarki; J–K, Entomobrya darelis sp. nov.; L, Entomobrya driesseni sp. nov.; M, Entomobrya durrasensis sp. nov.; N, Entomobrya grisacea sp. nov.; O, Entomobrya herbacea sp. nov. Bar=0.5 mm.

FIGURE 4. Photographs of: A, Entomobrya additae sp. nov., A1, Holotype, A2, dorsal view; B, E. albocincta; C, Entomobrya boreensis sp. nov., Photo: Holotype; D, Entomobrya caputovisensis sp. nov.; E, E. clarki, Lectotype; F, Entomobrya darelis sp. nov., Holotype; G, Entomobrya driesseni sp. nov., Holotype; H, Entomobrya durrasensis sp. nov., Holotype.; I, Entomobrya grisacea sp. nov., Holotype; J, Entomobrya herberti sp. nov., Holotype; K, 25, Entomobrya imbre sp. nov., Holotype; L, Entomobrya karta sp. nov., Holotype; M–N, M, E. lamingtonensis, Holotype and N, specimen from Perth. Bar=0.5 mm.

FIGURE 7. Entomobrya additae sp. nov. Line drawings A–H.A, leg 1 (bar=0.05 mm); B, leg 3 (bar=0.05 mm);; C, tip of dens and mucro (bar=0.014 mm); D, head chaetotaxy (bar 0.38 mm); E, Th II chaetotaxy; F, Abd II chaetotaxy; G, Abd III chaetotaxy; H, Abd IV chaetotaxy. Bar E–H=0.125 mm.