Ommatidiotus karafutonis Matsumura, 1911

Park, Jaekook & Jung, Sunghoon, 2024, The genus Ommatidiotus Spinola (Hemiptera: Auchenorrhyncha: Caliscelidae) from the Korean Peninsula and neighboring countries, Zootaxa 5496 (2), pp. 172-190 : 178-180

Ommatidiotus karafutonis Matsumura, 1911 stat. rev.

( Figs 3A–B , 4A–E )

Ommatidiotus karafutonis Matsumura, 1911: 31 ; Metcalf, 1958: 104 (synonymized by Anufriev & Emeljanov, 1988: 490).

Diagnostic characters. Recognized by body generally clay yellow. Coryphe a little longer than distance between eyes, rounded in front, with shallow longitudinal furrow in middle; Metope dark brown, middle of forehead, clypeus, lateral keels as well as cheeks yellowish. Antennae dark brown, the first and second narrowly yellowish at the tip. Pronotum and mesonotum each with reddish median keel, lateral keels of mesonotum distinct. Forewing clay yellow, without longitudinal stripes, claval margin yellowish. Legs clay yellow, apex excepted and hind tibiae dark brown. Abdomen blackish brown, with a triangular light spot in the middle and light segment margins. Female length 4.5 mm ( Figs 4A–E ) ( Matsumura, 1911).

Redescription. Female. COLORATION: General coloration of body brown. Ventral parts of body fuscous, contrast with background distinctly. Coryphe concolorous with background with longitudinal narrow reddish stripes, contrasted unicolored, surpassing pronotum and reaching posterior margins of mesonotum. surpassing pronotum, mesonotum and almost reaching posterior margins of mesonotum. Compound eyes grayish. Pronotum with reddish stripe. Paranotal lobes darker than background. Forewings with narrow reddish stripes weakly developed between cubital and median cells, not reaching posterior margins. Abdominal sternites concolorous. Tibiae and tarsus concolorous with background. Apices of leg spines black ( Figs 4A–E ). SURFACE AND VESTITURE: Head, body and forewings with sparse setae, rough. STRUCTURE: Head. Coryphe blunt, length as wide as width at midline without carinae, anterior margin round, posterior margin weakly concave ( Figs 4A–B ). Metope short and blunt in lateral view, lateral keels converging narrower to apical, sublateral carinae visible ( Fig. 4C ). Thorax. Pronotum distinctly shorter than coryphe at midline, without median carinae. Paradiscal fields of pronotum narrower behind eyes. Paranotal lobes of pronotum ovate, protruding ventrally. Posterior margin of pronotum concave. Mesonotum large, almost three times longer than pronotum, anterior margin convex, with lateral carinae reaching posterior margin ( Figs 4C–E ). Forewings elongated, surpassing posterior margin of abdomen distinctly ( Figs 4A–B ). Abdomen. in lateral view, almost flat ( Fig. 3B ). See Matsumura (1911) for original description also.

Measurements (in mm). Female (n=2). Body length (including forewing): 4.66-4.77; body length (excluding forewing): 3.96-3.98; body width (including forewing): 1.76-1.78; head length: 0.95-0.97; head width (including eyes): 1.31-1.32; coryphe length: 0.61-0.63; coryphe width: 0.74-0.75; metope length: 0.93-0.94; metope width: 0.80-0.82; pronotum length: 0.36-0.37; pronotum width: 0.90-0.91; mesonotum length: 0.75-0.77; mesonotum width: 0.95-0.96; forewing length: 3.62-3.65.

Material examined. Lectotype: 1♀, Sakhalin; 30.IX.1905, Yoichiro Ikuma leg. ( SEHU) ; Paralectotype: 1♀, same data as lectotype ( SEHU) .

Distributions. North Korea ( Matsumura, 1915), Russia (Sakhalin) ( Matsumura, 1911).

Hosts. Unknown.

Remarks. This species was a junior synonym for O. nigritus Matsumura by Anufriev and Emeljanov (1988). We reevaluated the species status of this species because the type specimens are respective in the type depository and have different morphological characters.

Figures

FIGURE 3. Ommatidiotus karafutonis Matsumura, lectotype and paralectotype. A. habitus, dorsal view; B. ditto, lateral view; C. lectotype and paralectotype labels. Scale bar: A–B: 1.0 mm.

FIGURE 4. Ommatidiotus karafutonis Matsumura, lectotype habitus.A. habitus, dorsal view; B. ditto, lateral view; C. head and thorax, dorsal view; D. ditto, lateral view; E. metope, ventral view. Scale bar: A–B: 1.0 mm; C–E: 0.5 mm.