Entomobrya durrasensis, 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: 34

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Entomobrya durrasensis

sp. nov.

Entomobrya durrasensis   sp. nov.

( Figs 1M View FIGURE 1 , 4H View FIGURE 4 , 16 View FIGURE 16 A–F)

Holotype. Male , NSW, South Durras, - 35.6622°S, 150.2922°E, 15m asl, swamp forest, sweeping, 4.vi.2006, PG leg., [ SAMA 22645 View Materials ]. GoogleMaps  

Description. Size. Length 1.245 mm.

Colour. See Figs 1M View FIGURE 1 and 4H View FIGURE 4 , colour characteristic.

Head. Eight eyes, G and H smaller in size than E and F. Antennae with 793 µm 3.4 times de head length. Labral papillae conic. External process of papilla E reaching the papilla tip. Labial posterior row with MEL 1 L 2 ciliated chaetae, without R.

Thorax and abdomen. Ratio of Abd IV/III=4.5. Tibiotarsus without differentiated chaetae, with exception of the presence of the smooth terminal chaetae on legs 3, characteristic for the genus. Unguis with 4 teeth: paired at 50% of the base, first unpaired at 75 % from the base, dorsal tooth basal. Unguiculus acuminated, narrow, external lamella of leg 3 serrate. Tenent hair clavate, longer than unguis. Trochanteral organ with 10 chaetae. Manubrial plate with 3 chaetae and 2 pseudopores. Mucro bidentate both teeth of similar size with mucronal basal spine, Mucro of 10 micrometers and distal smooth part of dens 2.5 times the length mucro.

Macrochaetotaxy. Simplified Mc formula as 3,1,0,1,2/4,5/0,2/0,0,1/0,0,2,2,2. Head chaetotaxy ( Fig. 16A View FIGURE 16 ) Mc An 2, An 3a1, An 3 and A 5. M 2, M 2 and M 4 present as Mc. In sutural row S 0, S 2, S 3, S 4, S 5i, S 5, Ps 2 and Ps 5 present. Thoracic chaetotaxy as Th II chaetotaxy ( Fig. 16B View FIGURE 16 ) T1 area with Mc m 1 m 2, m 2i and m 2i2, T2 area with Mc a 5, m 4, m 4i, m 4p and m 5. Abdominal chaetotaxy Abd II ( Fig. 16C View FIGURE 16 ) with m 3 and m 3e, on Abd III ( Fig. 16D View FIGURE 16 ) m3 Mc present; Abd IV ( Fig. 16E View FIGURE 16 ) with Mc A 4 –A 6, B 4– B 6. Sensillary formula usual for Entomobrya   . The bothriotricha on Abd IV in position T 2 and T 4 (0110).

Remarks. Only one specimen was available but it is described as it has conservation importance as the habitat was about to be destroyed to expand a caravan park so it was important to emphasise the biodiversity value of the swamp forest.

The species has a unique chaetotaxy and was in good condition. Four more species of Entomobrya   have 4, 5 Mc (with Mc m5 present) on areas T1and T2 on Th II: Entomobrya jirisana Lee & Park, 1984   , Entomobrya oleniensis ( Tshelnokov, 1987)   , Entomobrya striatella Börner, 1909   and Entomobrya vigintiseta Lee & Park, 1984   . Abd II has 0, 2 Mc in the new species, while the other species have 2, 4 Mc.

Etymology. Species name refers to the type locality.


Royal Botanic Gardens, National Herbarium of New South Wales