Odontothrips Amyot & Serville, 1843

Masumoto, Masami & Okajima, Shûji, 2021, A new species of Odontothrips Amyot & Serville (Thysanoptera, Thripidae) from Japan, Zootaxa 4942 (1), pp. 109-117 : 110

Genus Odontothrips Amyot & Serville

Odontothrips Amyot & Serville, 1843: 642 . Type species: Thrips phalerata Haliday, 1836, subsequently designated by Karny (1907: 45).

Diagnosis. Wings developed. Ocellar setae I present, setae III much elongate ( Fig. 5 ). Antennae 8-segmented, segment I with 2 dorsoapical setae, III–IV with forked sense-cones, III–VI with some rows of microtrichia on both dorsal and ventral surfaces, VI with inner sense-cone usually having wide base at least one-third as long as length of inner margin of segment ( Fig. 6 ). Pronotum with 2 pairs of posteroangular setae; posteromarginal setae 4 pairs. Mesonotum with median pair of setae near posterior margin. Metascutum sculptured with ill-formed reticulations medially and with transverse striae anteriorly; median pair of setae at anterior margin; CPS present ( Fig. 7 ). Metasternal endofurca without spinula. Fore wing first vein with setal row nearly complete, usually with subapical short gap in setal row and 2 distal setae; second vein with many setae equally spaced; clavus with five veinal and one discal setae; posteromarginal fringe cilia wavy. Tarsi 2-segmented, fore tibiae with 0–2 inner apical claws ( Fig. 8 ). Abdominal tergites without ctenidia and posteromarginal craspeda; tergite VIII with a group of irregular-arranged microtrichia anterior to each spiracle, posteromarginal comb present at each side, but lacking medially ( Fig. 18 ); tergite IX with MD setae developed; tergite X with longitudinal median split at distal half, split often very weak; sternites without craspeda and discal setae; sternites III–VII with three pairs of posteromarginal setae, II with two pairs. Male abdominal tergite IX with a pair of stout setae at or near posterior margin; sternites without large pore plate but a minute glandular opening posteromedially on several segments ( Fig. 20 ).

Comments. The members of Megalurothrips genus-group have been considered to have neither pore plates nor glandular structures on the male abdominal sternites ( Mound 2009), but Krueger et al. (2015) indicated that males of Megalurothrips sjostedti (Trybom) have on each of sternites IV–VII posteromedially a minute glandular opening associated with internal gland cells. Moreover, recently Mound and Ulitzka indicated that they had seen males of some Odontothrips species with a similar structure on the sternites as in M. sjostedti (personal communication 2020).

Figures

FIGURES 5–10. Odontothrips biuncus. Female, 5–9: (5) Head & pronotum; (6) Antenna; (7) Meso- and metanota; (8) Right fore tibia & tarsus (dorsally); (9) Abdominal tergite VI; (10) Abdominal tergites IX-X & endothecal spines, male

FIGURES 17–21. Odontothrips species, abdominal segments. O. kudoi sp. n., 17–19: (17) Tergite V, female; (18) Tergites VIII–X, female; (19) Tergite IX & endothecal spines, male; (20) Sternite IV, male, go=glandular opening; (21) O. loti, male, tergite IX & endothecal spines (from England deposited in NHM).