Drepanura albocoerulea ( Schött, 1917 ), Schott, 1917

Ma, Yitong, Chun, Zhao & Greenslade, Penelope, 2015, The genus Drepanura (Collembola: Entomobryidae) in Australia: descriptions of two new species and redescriptions of five known species, Zootaxa 4058 (3), pp. 373-387 : 378

Drepanura albocoerulea ( Schött, 1917)

Figs 2−3 , 36−51

Material examined. 14 females, Australia: Northern Territory: 23.31o 52.46”S 133. 40 o 09.18”E, north west of Alice Springs: Kunoth Paddock, pitfalls. 17~ 18−III −1976. Collected by Penelope Greenslade. All deposited in SAM.

Description. Body length up to 1.9mm. Ground colour pale yellow; eye patches dark blue; blue pigment on antennae, coxae, Abd. III −IV, manubrium, anterior and lateral margin of dorsal head, anterior margin of Th. II ( Fig. 2 ). In some specimen, Abd. III and IV pale and with a little pigment scattered ( Fig. 3 ).

Antenna 0.53−0.62 times length of body. Ratio of Ant. I −IV as 1.0/1.8−2.4/1.5−2.0/1.8−2.3. Distal part of Ant. IV with many sensory chaetae and normal ciliate chaetae and an apical rod-like bulb ( Fig. 36 ). Eyes 8+8, G and H smaller. Interocular chaetae as p, q, r, s, t, p chaeta larger than others. Dorsal cephalic chaetotaxy with 4 antennal (An1, An2, An3a1, An3), 2 median (M2, M4) and 7 sutural (S0, S2, S3, S4, S 4i, S5, S 5i) macrochaetae ( Fig. 37 ). Prelabral and labral chaetae 4/5, 5, 4, all smooth, distal labral margin with 4 papillae, each with 3 secondary spinules ( Fig. 38 ). Basal chaetae of labium as M, R, E, L1, L2, all ciliate ( Fig. 39 ).

Dorsal macrochaetae shown as in Fig. 40 . Th. II with 3 (m1, m2, m 2i) macrochaetae in Mm area and 6 (m 4i, m4, m4pi, m4p, a5, m5) macrochaetae in Ms area. Th. III with 3 (a1, a2, a3) macrochaetae in Am area and 6 (a 4i 2, a 4i, a4, a5, m 5i, m5) macrochaetae in As area. Trochanteral organ with 12−19 chaetae ( Fig. 41 ). Inner differentiated tibiotarsal chaetae ciliate, the most distal one smooth. Tenent hair clavate, 1.2−1.5 × length of inner side of unguis; Unguis with 4 inner teeth, first pair at about 0.5 distance from base of claw, and 2 unpaired teeth, first one at 0.7−0.8 and distal one at 0.8−0.9 distance from base respectively, two dorsal and lateral teeth about 0.5 distance from base; unguiculus acuminate and outer edge serrate ( Fig. 42 ).

Abd. IV 5.0−8.5 times as long as Abd. III along dorsal midline. Abd. I with 9 −10 (m 2i, m2, a2, a3, m3, m4p, m4, a5, m5, sometimes a6) macrochaetae. Abd. II with 4 central (a2, a3, m3, m3e) and 2 lateral (m5, m6) macrochaeta, Abd. III with 1 central (m3) and 3 lateral (am6, pm6, p6) macrochaetae ( Fig. 43 ). Macrochaetae, sensory chaetae and bothriotricha of Abd. IV as shown in Fig. 44 , lateral side with 16−20 macrochaetae on each side, central part with 25−29 macrochaetae. Abd. V with 3 sensory chaetae and 11 macrochaetae ( Fig. 45 ). Ventral tube anteriorly with 18−19 ciliate chaetae on each side ( Fig. 46 ); posteriorly with 10 smooth chaetae ( Fig. 47 ); each lateral flap with 7 smooth chaetae and 1 ciliate chaeta ( Fig. 48 ). Tenaculum with 4 teeth and 1 large striate chaeta ( Fig. 49 ). Manubrial plaque with 4 ciliate chaetae and 2 pseudopores ( Fig. 50 ). Distal smooth part of dens 2.8−2.9 times as long as mucro in length. Mucro falcate and tip of basal spine not reaching apex of apical tooth ( Fig. 51 ).

Remarks. In the original description by Schött, in 1917, the head, latero-ventral part of Th. II −III, most part of Abd. II −IV are deep blue −black. In our specimens, the dorsal head is not totally blue −black and some irregular yellowish stripes are present on dorsal of Abd. IV.

Type locality. Australia: Kimberley District. Lectotype in the NHRM No.4173 (not examined).

Figures

FIGURES 1 − 9. Habitus: 1, Drepanura liuae sp. nov.: 2 and 3, D. albocoerulea (Schött, 1917); 4 and 5, D. cinquilineata Womersley, 1934; 6 and 7, D. citricola Womersley, 1934; 8, D. cobaltina (Schött, 1917); 9, D. coeruleopicta (Schött, 1917).

FIGURES 36 − 51. Drepanura albocoerulea (Schött, 1917): 36, apex of Ant. IV; 37, dorsal chaetotaxy of head; 38, labrum; 39, labium; 40, chaetotaxy of Th. II − III; 41, trochanteral organ; 42, foot complex; 43, chaetotaxy of Abd. I − III; 44, chaetotaxy of Abd. IV; 45, chaetotaxy of Abd. V; 46, anterior face of ventral tube; 47, posterior face of ventral tube; 48, lateral flap of ventral tube; 49, tenaculum; 50, plaque of manubrium; 51, mucro.