Karnyothrips yoshi Okajima

Karnyothrips yoshi Okajima View in CoL

( Figs 4–5 View FIGURES 1–5 , 240–246 View FIGURES 240–246 )

Karnyothrips yoshi Okajima, 2006: 400–404 View in CoL .

This species was described from the temperate region of Honshu, the mainland of Japan, and occurs on Phragmitis communis or some other genera and species of Poaceae View in CoL at river side. Unfortunately, its feeding behavior remains uncertain. Previously it had been known only from apterous females and males, but two macropterous females are here recorded for the first time. It is peculiar in having the pronotal midlateral setae reduced, and the terminal tube setae almost as long as the tube. Moreover, the macropterous female has no duplicated cilia on the fore wings, the sub-basal wing setae short and acute, and the intermediate abdominal tergites each with only one pair of wing-retaining setae. These character states are somewhat different from typical Karnyothrips species, but do not appear to be decisive enough to separate the genera. This is because K. micrommatus also has only one pair of wing-retaining setae on each intermediate abdominal tergite and lacks duplicated cilia on the fore wings. The terminal tube setae of K. mucidus View in CoL are somewhat intermediate, only 1.3 times longer than the tube. In addition, prosternal basantra and ferna are slightly closer in this species ( Fig. 241 View FIGURES 240–246 ), but the same tendency can be seen in K. acutus ( Fig. 43 View FIGURES 41–47 ) and K. semiflavus ( Fig. 190 View FIGURES 188–193 ). Therefore, these character states are likely to fall within the range of interspecific variation.

Diagnosis. Slightly bicolored, head and thorax yellowish, paler than abdomen. Head about 1.6 times as long as wide ( Fig. 240 View FIGURES 240–246 ); postocular setae shorter than eyes, bluntly pointed. Eyes and ocelli rather small. Antennal segment VIII not or scarcely constricted at base, but well separated from segment VII ( Fig. 245 View FIGURES 240–246 ); segments III and VI each with two (1+1) sense cones. Maxillary stylets reaching postocular setae, rather close together medially; maxillary bridge narrower than one-fourth of head width. Prothoracic ml reduced; notopleural sutures complete. Prosternal basantra and ferna developed, basantra located near ferna ( Fig. 241 View FIGURES 240–246 ). Mesopresternum reduced medially. Fore wings, if present, without duplicated cilia; sub-basal wing setae not developed, short and acute. Pelta wide, trapezoid. Abdominal tergites III–VII each with one pair of wing-retaining setae ( Fig. 242 View FIGURES 240–246 ) in macropterae. Tergite IX S1 and S2 setae longer than tube, pointed; intermediate setae between them short. Tube about half of head length, or a little shorter; terminal setae almost as long as tube.

Specimens-examined. Japan, holotype female and paratype females and males (see Okajima 2006, p. 402). Additional specimens: Kanagawa, Noborito , on grass, 1 female (mac.), 19.x.2023, 1 female (mac.), 26.x.2023, SO .

Taxa excluded from the genus Karnyothrips

Reyes (1994) described two Karnyothrips species from the Philippines, but one of them, K. ateuchis , is considered here to be removed from the genus. It is considered to represent a new genus described below and is presumably not so closely related to Karnyothrips .