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

Entomobrya durrasensis sp. nov.

( Figs 1M , 4H , 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 ].

Description. Size. Length 1.245 mm.

Colour. See Figs 1M and 4H , 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 ) 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 ) 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 ) with m 3 and m 3e, on Abd III ( Fig. 16D ) m3 Mc present; Abd IV ( Fig. 16E ) 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.

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 16. Entomobrya durrasensis sp. nov. Line drawings A–E. A, head chaetotaxy (bar=0.04 mm); B, Th II chaetotaxy (bar=0.025 mm); C, Abd II chaetotaxy; D, Abd III chaetotaxy; E, Abd IV chaetotaxy. (Bar for C–E=0.060 mm)