Entomobrya herberti, 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 : 38-40

Entomobrya herberti sp. nov.

( Figs 2A , 4J , 19 A–E)

Holotype. Female,WA, Nedlands, Perth, - 31.9820°S, 115.8070°E; 14m asl, 8.vi.1932, HW leg. [ SAMA 22648– 01 ].

Paratypes. Male and 2 females; female WA, Denmark, 6.vii.1932, - 34.9749°S, 117.3561°E, 11m asl, HW leg [ SAMA 22648–02 ]. Both slides identified as E. marginata by Womersley on the slides .

Description. Size. Length 1.616 mm (n= 4).

Colour. Likely to be bluish with darker blue bands posteriorly on each tergite, but faded in time as mounted in Hoyer, possibly also cleared. At 1000x some scattered pigment granules can be seen along the body arranged more densely lateral and posteriorly on segments.

Head. Eight eyes, G and H smaller in size than E and F. Antennae at 758 µm, 2.4 times head length. Terminal vesicle simple on Ant IV. Sensory organ of Ant III with central sensilla bent with 6 µm long ( Fig. 19A ). Labral papillae multispinate. External process of papilla E not reaching to the papilla tip. Labium with MREL 1 L 2 chaetae, all ciliated and R 2/3 of M.

Thorax and abdomen. Ratio of Abd IV/III=3.2 (n=4). 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 two at 50% from base, first unpaired teeth at 75 % from the base, dorsal tooth basal, lateral a little below the paired ones. Unguiculus acuminated, narrow, external lamella of leg 3 serrate. Tenent hair clavate, longer than unguis. Trochanteral organ with 8–10 chaetae. Manubrial plate with 4 chaetae and 2 pseudopores. Mucro bidentate, both teeth of similar size with mucronal basal spine. Mucro of 15 micrometers and smooth distal portion of dens twice the length mucro.

Macrochaetotaxy. Simplified Mc formula: 3,1,0,3,2/2,4/2,4/1,2,1/0,3,4,2,2. Head chaetotaxy ( Fig. 19B ) Mc An 2, An 3a1, An 3 and A 5. M 1, M 2, M 3 and M 4 present as Mc. In sutural row S 0, S 2, S 3, S 4i, S 4, S 5i, S 5. Ps 2 and Ps 5 present. Thoracic chaetotaxy of Th II ( Fig. 19C ) T1 area with Mc m 1 and m 2, m 2i, T2 area with Mc a 5, m 4, m 4i, and m 5 (a 5’ present as mesochaeta). Abdominal chaetotaxy ( Fig. 19D ) Abd II with a 2, a 3, m 3, m 3ep, m 3e and m 3ei as Mc ; on Abd III a 1, a 2, a 3 and m 3 Mc present; Abd IV ( Fig. 19D ) with Mc A 2, A 4 –A 6, A e4, B 2, B 4 –B 6, C 1 and C 2a. Sensillary formula usual for Entomobrya . The bothriotricha on Abd IV in position T 2 and T 4 (0110).

Remarks. Four species of Canary Islands and one European have similar simplified formula chaetotaxy on Th II, Abd II, and Abd III (2,4/2,4/1,2,1) ( Jordana & Baquero, 2005): E. airami Baquero & Jordana, 2018 , E. arvensis, Latzel, 1918 , E. atteneri, Baquero & Jordana, 2018 , E. guacimarae Baquero & Jordana, 2018 and E. palmensis Jordana & Baquero, 2010 . Entomobrya arvensis is the only one not polychaetose on Abd IV with only 14 central Mc (0,0,3,2,2). Entomobrya airami and E. palmensis have smooth labral papillae and Area 6 of Abd IV with 2 and 3 Mc respectively, different to E. herberti sp. nov. (it has multi-spinate papilla and no Mc on A6 on Abd IV). Entomobrya guacimarae has labral papilla and external unguiculus smooth, as 4,3 Mc on H1 and H2 on the head. While they are ciliated on E. herberti and it has 3,1 Mc on H1 and H2 areas of the head. Entomobrya atteneri is different in having 3, 2(3) Mc on H1 and H2 area of the head, and 0,4,3,2,2 Mc on A6-A10 on Abd IV while E. herberti has 3,4,2,2 Mc on this segment ( Table 6 ). The colour also differs.

Etymology. Named for Herbert Womersley who collected all the specimens.

Figures

FIGURE 2. Habitus and colour of: A, Entomobrya herberti sp. nov.; B, Entomobrya imbre sp. nov.; C, Entomobrya karta sp. nov. sp.; D, Entomobrya kitchingi sp. nov.; E, E. lamingtonensis Schött, 1917; F, Entomobrya loftyensis sp. nov.; G, Entomobrya ludimus sp. nov.; E. mauretanica Handschin, 1925 sensu Baquero et al., 2009; I, Entomobrya militum sp. nov.; J, E. multifasciata (Tullberg, 1871) Brook, 1884; K, Entomobrya niger comb. nov.; L–M, E. nigrocincta Denis, 1923, L, female, M, male; N, Entomobrya potterae sp. nov.; O, Entomobrya peregrina 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 19. Entomobrya herberti sp. nov. Line drawings A–E:A,Ant organ III (bar=0.005 mm); B. head chaetotaxy (bar=0.06 mm); C, Th II chaetotaxy; D, Abd II–III chaetotaxy; E, Abd IV chaetotaxy. (Bar for C to E=0.03 mm).