(106 DTjub) Detriturus jubilarius (Gisin, 1957)

Detriturus (formerly Onychiurus) jubilarius does not possess anal spines and the furca is absent. The post-antennal organ (PAO) contains about 12 complex vesicles. The dorsal pseudocelli (PSO) formula is 33/133/33354, with the three PSO behind the antennae arranged in a triangle (Fig. 1). The dorsal side bears lanceolate setae (Fig. 2) arranged as 2/011/11101 on each side in addition to normal setae (i.e. there are two pairs of lanceolate setae on the head, and one pair on thoracic segments 2 and 3, and abdominal segments 1, 2, 3, and 5). The tibiotarsi of the legs each have11 distal setae (Figs. 3, 4, 5). A small inner tooth on the claw is absent, and males have a row of eight enlarged ventral setae on both the second and third abdominal segments (abd2, abd3).   Steve  only saw two specimens which fitted this description; they were 0.8 mm in length and were collected from fields at the Weed Research Organisation, Kidlington, Oxfordshire by Harold Gough.
     Detriturus jubilarius should be looked for in collections of Collembola from agricultural soils as its small size makes the species easy to overlook.




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