Entomobrya herbacea, 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 : 37-38

Entomobrya herbacea sp. nov.

( Figs 1O , 18 A–E)

Holotype. Female, NSW, Robertson, - 34.5833°S, 150.5833°E, 731m asl, on Protea , 10.v.95, G. Weller leg., [ SAMA 22647–01 ].

Paratypes. Female, same data as holotype, [ SAMA 22647–02 ] .

Other material examined. Female, NSW, - 32.6421°S, 152.1838°E, 10m asl , Hawks Nest on Banksia , 1988, G. Campbell leg.. SA , Adelaide, ex Kiwi fruit and assorted plant matter from NZ, intercepted at Port Adelaide , 26.v.87, [ SAMA] .

Description. Size. Length up to 1.653 mm excluding antennae, (n=4).

Colour. All slide specimens cleared but noted as pale colour in alcohol on label ( Fig. 1O ).

Head. Eight eyes, G and H smaller than E and F. Ant length=690 μm. Ratio Ant /Head=5.3.Ant IV with bilobed vesicle. Four labral papillae with one spine like projection ( Fig. 18B ). Labral Mc formula: 4/554, four prelabral ciliated chaetae, labral chaetae smooth. Labial chaetae MREL 1 L 2 all ciliated, only with one Mc M; R smaller than M. Lateral process of labial papilla E reaching the tip of the papilla. Maxillary palp bifurcate with three sublobal chaetae.

Thorax and abdomen. Length ratio of Abd IV/III=3.23 (n=4). Tibiotarsus without differentiated chaetae, with exception of the presence of the smooth terminal chaetae on legs 3, characteristic for the genus. Unguis length of internal edge 40 μm. Unguis with 4 teeth, paired two at 40 % from base and first unpaired tooth at 70 % from the base, the terminal one minute; lateral teeth below the level of paired ones, dorsal tooth more basal, unguiculus lanceolate with external serrated lamella. Tenent hair clavate (60 μm length), longer than internal unguis edge. Trochanteral organ with 12 spiny chaetae. The length of manubrium and dens 265 + 390=655 μm (n=4). Manubrial plate with 4 chaetae and 2 pseudopores. Mucro bidentate with apical tooth of similar size than sub apical one, and with mucronal basal spine reaching the tip of subapical tooth. Mucro 12 μm. Length of smooth apical portion of dens 30 μm.

Macrochaetotaxy. Simplified Mc formula: 3,1,0,2,1a/1,4/1,2/0,0,1/0,1,1,2,2. Head chaetotaxy ( Fig. 18A ) area H1with Mc An 2, An 3a1 and An 3 present with A 5 Mc on H2 area. M 1 to M 4 present as Mc. In sutural row S 0, S 2, S 3, S 4i, S 4, S 5i and S 5. Ps 5 present. Thoracic chaetotaxy Th II ( Fig. 18C ) with only Mc m 1 on T1, T2 area with a 5, m 4, m 4i and m 5 present. Abdominal chaetotaxy, a 2 present on A1 area as Mc at Abd II, m 3 and m 3e Mc present on A2 area of Abd II ( Fig. 18D ). On Abd III only m 3 Mc present on A5 area. Abd IV ( Fig.18E ) with Mc B 3 on A7 area; area A8 only with one Mc (A 4), area A9 with two Mc (A 5 and B 5) and A10 area with two Mc B 6 and A 6.

Remarks. Details of colour unknown but likely to be pale. The chaetotaxy of E. herbacea is similar to E. ludimus sp. nov., E. peregrina sp. nov. and Entomobrya niger com. nov., taking into account the characters of Abd II and III and the T1 area of Th II, but it is separate from E. ludimus sp. nov. and E. peregrina sp. nov. by these two species having 3 and 2 Mc on T2 area of Th II, while this new species and E. niger comb. nov. have 4 (m 5 present). Entomobrya niger com. nov. has M 2, M 3 and S 4i absent on the head, but present on this new species. The only Mc on T1 area of Th II is m 2 in E. niger comb. nov. and m1 on E. herbacea sp. nov., and the Mc of Abd IV are A 4 –A 6, B 3, B 5 and B 6 on E. herbacea sp. nov. and A 4 –A 6, B 5 –B 6 and C 2a in E. niger com. nov.

Etymology. The species name refers to the habitat of this species as it has only been found associated with native shrubs.

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 18. Entomobrya herbacea sp. nov. Line drawings A–E: A, head chaetotaxy (bar=0.06 mm); B, labral papillae (bar=0.025 mm); C, Th II chaetotaxy (bar=0.04 mm); D, Abd II–III chaetotaxy E, Abd IV chaetotaxy; bar=0.08 mm); bar D–E=0.08 mm).