Oneilliella williamsi (Hood)

Lima, Élison Fabrício B., Vieira, Daniel E., O’Donnell, Cheryle A. & Mound, Laurence A., 2023, Systematics and species recognition in Oneilliella Wilson (Thripidae: Panchaetothripinae), Zootaxa 5336 (3), pp. 389-400 : 398-399

Oneilliella williamsi (Hood)

( Figs 31–37 )

Female macroptera. Body mostly brown ( Fig. 31 ), except area between outer margins of ocellar triangle and compound eyes light brown ( Fig. 35 ), tarsi and apex of mid and hind tibiae yellow, fore femora light brown and fore tibiae light brown with apex yellow. Antennal segment I light brown, II brown, III brown with pale apical neck, IV brown medially with basal third pale and apical third light brown, V pale, VI brown, VII–VIII light brown ( Fig. 33 ). Fore wing brown, except for sub-basal band formed by the posterior extension of the pale sub-basal spot, anterior to fork of veins. Antennal segment III with long apical neck, 2.0 times longer than wide, sense cone on segment IV not surpassing antennal segment V. Fore wing setae robust, first vein with three distal setae, second vein with 8 regularly spaced setae, fork of veins with robust microtrichia, clavus with 3 setae in addition to a marginal seta ( Fig. 34 ). Reticles on pronotum and metanotum without internal markings ( Fig. 35 ). Abdominal tergite II 3.3 times wider than long and almost completely covered by polygonal reticulations, except medially on posterior margin and laterally on anterior angles, tergites III–VIII without sculpture medially, with reticles submedially and with oblique striae laterally, X without longitudinal split ( Fig. 36 ).

Male macroptera. Similar to the female, but smaller ( Fig. 32 ). Setae on fore wing less robust. Pore plates on sternite III oval and on IV–VII transverse and concave ( Fig. 37 ).

Measurements (Male in microns): Body length 1150. Head length 100; width 150. Pronotum length 80; width 175. Forewing length 650, setae length 25. Length of antennal segments I–VII 25, 38, 63, 50, 30, 25, 12, apical neck on segment III length, width 25.

Material Studied. Holotype female. Trinidad. St. Annes., beaten on miscellaneous, 28.iii.1915. Brazil. Minas Gerais: Pedralva , on leaves of unidentified herbaceous Fabaceae , 1 female, 15.iv.2017 (E.F.B. Lima) ( CHNUFPI); Acre: Bujari, Floresta Estadual Antimary, on Malaise trap, 18–31.iii.2017, 1 female and 1 male (E.F. Morato and J.A. Rafael) ( INPA and CHNUFPI).

Comments. This is the type species of the genus and is here redescribed based on morphological characters that we consider useful for species recognition in Oneilliella . Apart from the holotype, specimens from Minas Gerais and Acre match with the general morphology of williamsi , suggesting that the distribution of the species is broad. It resembles chicoi , but can be distinguished by the characters in the key. The first description of the male is given above.

Figures

FIGURES 31–38. Oneilliella williamsi. (31) holotype female; (32) male; (33) antenna; (34) fore wing; (35) head, thorax and abdominal tergite I; (36) abdominal tergites III–X; (37) male abdominal tergites IX–X; (38) male abdominal sternites III–VII.