Tingidae

Souma, Jun, 2022, Two new species of the genus Omoplax (Hemiptera: Heteroptera: Tingidae) from Mukojima Island, with new records of lace bugs endemic to the Ogasawara Islands, Japan, Acta Entomologica Musei Nationalis Pragae 62 (1), pp. 117-127 : 126

Key to species of Tingidae occurring in the Ogasawara Islands, Japan

1 Head with long spines ( Figs 6A, B ); paranotum narrowed posteriad; outer margin of paranotum with robust denticles throughout its length; anterior margin of hemelytron with robust denticles throughout its length; R+M (radiomedial) vein of hemelytron with denticles throughout its length. ................................................... .... Acanthomoplax tomokunii Souma & Kamitani, 2021

– Head with very short spines ( Figs 2D–F , 5B ); paranotum widened posteriad ( Figs 2A–C , 5A ); outer margin of paranotum without robust denticles throughout its length; anterior margin of hemelytron without robust denticles throughout its length ( Figs 3A–C ); R+M vein of hemelytron without denticles throughout its length ( Figs 3D–F ). .................................................. 2

2 Rostrum reaching posterior margin of metasternum ( Fig. 4A ). .................................................................. 3

– Rostrum reaching middle part of mesosternum ( Fig. 4B ). ........................................................................... 4

3 Paranotum carinate in anterior part and rounded in posterior part ( Figs 6C–E ); R+M vein of hemelytron indistinct, not carinate. ................................................ ........................... Omoplax desecta ( Horváth, 1912)

– Paranotum rounded throughout its length ( Figs 2A, B, D, E , 5A ); R+M vein of hemelytron distinct, carinate ( Figs 3A, B, D, E ). ...................... O. karubei sp. nov.

4 Pronotal disc and body ventral side black ( Figs 6F, G ); hood with 4–5 rows of areolae at highest part; paranotum carinate in anterior part and rounded in posteri- or part (occasionally rounded throughout its length); subcostal and discoidal areas of hemelytron distinguishable. ................ O. majorcarinae Guilbert, 2001

– Pronotal disc and body ventral side brown ( Figs 2C , 4B, E ); hood with 3 rows of areolae at highest part ( Fig. 2F ); paranotum rounded throughout its length ( Fig. 5B ); subcostal and discoidal areas of hemelytron indistinguishable ( Figs 3C, F ). .................................... ........................................ O. mukojimensis sp. nov.

Figures

Figs 2A–F. Head and pronotum, dorsal and dorsolateral views: A, B, D, E – Omoplax karubei sp. nov.: A, D – male, B, E – female. C, F – O. mukojimensis sp. nov.: female. Scale bars = 0.2 mm.

Figs 3A–F. Hemelytra, dorsal and dorsolateral views: A, B, D, E – Omoplax karubei sp. nov.: A, D – male, B, E – female. C, F – O. mukojimensis sp. nov.: female. Scale bars = 0.2 mm.

Figs 4A–E. A–B – rostra and sternal laminae, ventral view:A – Omoplax karubei sp. nov.; B – O. mukojimensis sp. nov. C–E – apical part of the abdomen, ventral view: C, D – O. karubei sp. nov.: C – male, D – female; E – O. mukojimensis sp. nov.: female. Scale bars = 0.2 mm.

Figs 5A–B. Line drawings of head and pronotum, dorsal view: A – Omoplax karubei sp. nov.; B – O. mukojimensis sp. nov. Abbreviations: ca – calli; co – collar; ho – hood; mc – median carina; pa – paranotum; pd – pronotal disc; pp – posterior process. Scale bars = 0.2 mm.

Figs 6A–G. Three tingid species endemic to the Ogasawara Islands, Japan, dorsal view: A–B – Acanthomoplax tomokunii Souma & Kamitani, 2021: A – male from Hahajima Island, B – female from Ototojima Island. C–E – Omoplax desecta (Horváth, 1912): C – male from Mukohjima Island, D – female from Meijima Island, E – female from Nakoudojima Island. F–G – O. majorcarinae Guilbert, 2001: F – male from Hahajima Island, G – female from Chichijima Island. Scale bar = 1.0 mm.