Senithrips Mound & Minaei

Mound, Laurence A., Dang, Li-Hong & Tree, Desley J., 2013, Genera of fungivorous Phlaeothripinae (Thysanoptera) from dead branches and leaf-litter in Australia, Zootaxa 3681 (3), pp. 201-224 : 217

Senithrips Mound & Minaei

The single minute, usually wingless, species in this genus, S. psomus , is known only from Barrow Island, Western Australia ( Mound & Minaei 2006). As in other small wingless thrips, many structural features are severely reduced, with resultant problems in suggesting any relationships ( Figs 20 , 37 ).

Diagnosis. Head longer than wide, without major setae; eyes reduced to 6 ommatidia in aptera and macroptera; mouth-cone short and rounded, stylets long, retracted to eyes, close together medially; antennae 6-segmented, morphological segments VI–VIII fused, III with no sensorium, IV with 2 sensoria; pronotal setae minute, notopleural sutures incomplete; basantra absent; mesopraesternum eroded into 2 lateral plates, mesoeusternum divided longitudinally; no sternopleural sutures; fore tarsal tooth absent; fore wing when present swollen at base, parallel-sided, without duplicated cilia; pelta broad but slender; tergites III–VII of macropterae each with 2 pairs of sigmoid wing retaining setae, with transverse row of more than 12 small setae; tergite IX postermaginal setae shorter than tube; tube shorter than head, anal setae much shorter than tube; male sternite VIII without pore plate.

Figures

FIGURES 19 – 24. Phlaeothripinae genera. (19) Baenothrips moundi, tergites IX – X; (20) Senithrips psomus, antenna; (21) Ecacanthothrips tibialis, small male; (22) Habrothrips curious; (23) Hoplothrips orientalis small male; (24) Horistothrips australis; (25) Holothrips oceanicus.

FIGURES 32 – 38. Phlaeothripinae genera. (32) Octurothrips pulcher, tergites IX – X; (33) Solomonthrips australiensis, tergites VII – IX; (34) Psalidothrips taylori, thoracic sternites—arrows indicate sterno-pleural sutures; (35) Psalidothrips sp., male; (36) Sophiothrips sp.; (37) Senithrips psomus, macroptera thoracic sternites; (38) Pygmaeothrips angusticeps, female microptera.