Adrothrips mitchelli, Mound & Tree & Wells, 2022

Mound, Laurence A., Tree, Desley J. & Wells, Alice, 2022, Convoluted maxillary stylets among Australian Thysanoptera Phlaeothripinae associated mainly with Casuarinaceae trees, Zootaxa 5190 (3), pp. 301-332 : 311-313

Adrothrips mitchelli sp.n.

( Figs 10 , 21 , 36 )

Female macroptera. Body brown, tube darkest with tarsi, apices of tibiae and antennal segment III paler; fore wings clear. Head about as long as wide, postocular setae capitate; vertex transversely reticulate with markings internal to each reticle. Maxillary stylets retracted into eyes, crossing over near ocelli then re-crossing at occipital ridge, with one flexure before entering the mouth cone ( Fig. 21 ). Antennal segment III short with no sense cone, IV with 2 sense cones, apex of V asymmetric with one short stout sense cone ( Fig. 10 ). Pronotum with weak, complicated reticulation, all five pairs of major setae short and capitate. Metanotum irregularly reticulate, reticles with internal markings, bearing many small setae. Mesopresternum reduced to two weak triangles. Fore tarsal tooth scarcely visible, reduced to a small lobe on the inner basal third of the tarsus. Fore wing with 2 capitate sub-basal setae. Pelta elongate triangular, reticulate; posterior pair of wing-retaining setae long and placed laterally on tergites II–VI, anterior pair reduced on each tergite, both pairs reduced on VII; tergite IX setae capitate and shorter than basal width of tube; tube sculptured, much broader in basal than in distal third ( Fig. 36 ).

Measurements (holotype female in microns). Body length 1640. Head, length 170; width medially 160; po setae 12. Pronotum, length 115; width 200; prothorax width across coxae 270; major setae – am 10, aa 12, ml 12, epim 25, pa 20. Fore wing length 130; sub-basal setae 12. Tergite IX setae S1 30, S2 40. Tube, basal width 65, maximum width 75, length 90. Antennal segments III–VIII length 30, 37, 37, 45, 25, 20.

Specimen studied. Holotype female macroptera, New South Wales, Trangie , from Acacia pendula , 8.xii.2001 ( LAM 4065 ) in ANIC.

Comments. The only available specimen is uncleared, such that some details are not visible. The head and stylets are similar to aureus but dark brown ( Fig. 21 ) but the form of the tenth abdominal segment is unique in this genus ( Fig. 36 ), and the fore tarsal tooth is reduced to a very small swelling on the inner basal third of the tarsus.

Figures

FIGURES 2–10. Adrothrips species antennae. (2) aureus; (3) cotteri; (4) intermedius; (5) latrarei; (6) lihongae; (7) madiae; (8) vernoni; (9) westoni; (10) mitchelli.

FIGURES 20–27. Adrothrips heads, metanotum & pelta. (20) vernoni holotype; (21) mitchelli holotype; (22) aureus; (23) intermedius; (24) latrarei; (25) madiae; (26) vernoni; (27) systenus.

FIGURES 28–39. Adrothrips prosternites and abdomen. (28) cotteri; (29) latrarei; (30) lihongae; (31) vernoni; (32) akanthus; (33) aureus; (34) cotteri; (35) intermedius; (36) mitchelli; (37) systenus; (38) vernoni; (39) westoni.