Trachynotothrips, Okajima, Masami Masumoto And Shûji, 2005

Okajima, Masami Masumoto And Shûji, 2005, A remarkable new genus of Thripinae (Thysanoptera, Thripidae) with enlarged metathoracic furca, from Southeast Asia, Zootaxa 1048, pp. 53-64 : 55

Trachynotothrips gen. nov.

Type species. Trachynotothrips striatus sp. nov.

Description. Head wider than long, concave in front of fore ocellus, constricted just behind compound eyes with rounded cheeks, distinctly sculptured with anastomosing striae on cheeks to ventral surface behind compound eyes and frons; postocular area about as long as longitudinal diameter of hind ocelli ( Figs. 1 , 8 ). Frons with five pairs of setae anterior to anterior tentorial pits; mouth­cone short and rounded with 3­segmented maxillary palps. Compound eyes bulging, without pigmented ommatidia on ventral surface. Ocellar setae I absent; two pairs of postocular setae, at inner and outer angles of compound eyes ( Figs. 1 , 8 ). Antennae 8­segmented, segment I with two dorsal apical setae; segments III and IV with forked sense­cones; number of setae on segments III to V as follows: 4, 5, 6 ( Figs. 2 , 9 ).

Pronotum wider than long, distinctly sculptured with transverse anastomosing striae; two pairs of posteroangular setae and two pairs of posteromarginal setae ( Fig. 1 , 8 ). Metascutum with median pair of setae situated slightly behind anterior margin; campaniform sensilla absent ( Figs. 3 , 10 ). Metaepisternum without setae, sculptured with narrowly spaced­striae. Metaepimeron with two setae, sculptured with narrowly spacedstriae. Metapreepisternum developed and with a seta, sculptured with transverse striae. Prosternal ferna weakly connected at middle ( Fig. 11 ); basantra membranous without setae. Mesosternum without sternopleural suture; furca with a spinula ( Fig. 11 ). Metasternal furca strongly developed Y­shaped arms extending to mesothorax with a median spinula ( Fig. 11 ). Fore wings with stout setae; first vein with long gap in setal row at middle, two setae on distal half; posterior fringe cilia wavy; clavus with four veinal and no or 1 discal setae. Tarsi 2­segmented.

Abdominal terga without ctenidia; terga and sterna without posteromarginal craspeda; each side of terga I to VIII and laterotergites with strong lines of sculpture directed posteriorly ( Fig. 12 ); terga II to VII with three setae (B3–B5 setae) along lateral margin arranged in a straight line ( Fig. 12 ); tergum VIII without comb on posterior margin, but with a few vestigial microtrichia at middle and each side; tergum IX without campaniform sensilla; tergum X without median split ( Fig. 13 ); sterna without discal setae; sternum II with two pairs of posteromarginal setae; sterna III to VII with three pairs of posteromarginal setae. Ovipositor developed.

Male abdominal tergum IX with a pair of horn­like processes (drepanae) on posterior margin ( Figs. 6 , 15 ); sterna III to VIII with scattered small glandular areas ( Figs. 7 , 14 ).

Etymology. Derived from the Greece trachys, rough, not smooth, and notos, the back, in reference to strong sculpture lines on dorsal surface, and thrips; gender masculine.

Figures

FIGURES 1 – 4. Trachynotothrips brevispinis gen. et sp. n. (male). (1) Head & Pronotum; (2) Antenna (right); (3) Metascutum; (4) Abdominal tergum and laterotergite (left) III (sculpture omitted at right side). Scale bar = 0.04 mm.

FIGURES 8 – 10. Trachynotothrips striatus gen. et sp. n. (female). (8) Head & Pronotum; (9) Antenna (right); (10) Meso­ and metanota (sculpture omitted at metascutellum). Scale bar = 0.04 mm.

FIGURES 11 – 13. Trachynotothrips striatus gen. et sp. n. (female). (11) Meso­ and metasterna; (12) Abdominal tergum and laterotergite V (right side); (13): Abdominal terga VIII – XI (sculpture omitted on tergum IX). MD = mid­dorsal setae. Scale bar = 0.04 mm.

FIGURES 5 – 7. Trachynotothrips brevispinis gen. et sp. n. (male). Abdominal segments. (5) Tergum VI (left side) (sculpture omitted); (6) Tergum IX; (7) Sterna VII – VIII. Scale bar = 0.04 mm.

FIGURES 14 – 15. Trachynotothrips striatus gen. et sp. n. (male). Abdominal segments. (14) sterna VII – VIII; (15) tergum IX (sculpture omitted). Scale bar = 0.04 mm.