Neolygus chikanoshima, Yasunaga, 2024

Yasunaga, Tomohide, 2024, New species of the plant bug genus Neolygus Knight from Japan, Taiwan and Thailand (Hemiptera: Heteroptera: Miridae: Mirini), Zootaxa 5446 (4), pp. 451-487 : 462-463

publication ID	https://doi.org/ 10.11646/zootaxa.5446.4.1
publication LSID	lsid:zoobank.org:pub:C204C80E-332C-4537-A6BA-1FC372BD6783
DOI	https://doi.org/10.5281/zenodo.11121628
persistent identifier	https://treatment.plazi.org/id/6C640C52-B303-FFB9-78AF-F89FFD6EFB4F
treatment provided by	Plazi
scientific name	Neolygus chikanoshima
status	sp. nov.

Treatment

Neolygus chikanoshima n. sp.

Figs. 1E–G View FIGURE 1 , 4D–F View FIGURE 4 , 9A, E View FIGURE 9 , 10E–F View FIGURE 10 , 15 View FIGURE 15

Material examined. Holotype (♀). JAPAN: Kyushu, Nagasaki Pref., Goto Islands, Shin-Kamigoto Town , Nakadori Island , Tsuzuki-Hamanoura , 32.960822, 129.027677, UV lighting, 5–6 Jun 2020, T. Yasunaga ( NWHS) ( AMNH _ PBI 00378767 View Materials ). GoogleMaps Paratypes: JAPAN: same data as for holotype, 1♂ 1♀ ( TYCN) [a male specimen was damaged (accidentally squashed) while collecting ( Fig. 4D–E View FIGURE 4 )] GoogleMaps .

Diagnosis. Judging from the similarity in external features and male genitalic structures, this new species is assumed to be most closely related to N. kyushuensis (Yasunaga) ( Fig. 2A–B View FIGURE 2 ) and its sibling N. tiliicola (Kulik) ( Fig. 2D–E View FIGURE 2 ), from which N. chikanoshima n. sp. can be distinguished by its ovoid, rather stout body ( Fig. 1E, G View FIGURE 1 ); antennal segment III longer than width of head across eyes; larger dark macula at apex of corium; right paramere with conical process at apex of sensory lobe ( Fig. 10E–F View FIGURE 10 ); thick-rimmed, elongate-oval sclerotized ring ( Fig. 9E View FIGURE 9 , 15L View FIGURE 15 ); and interramal sclerite on posterior wall bearing distinct field of spinules ( Fig. 15M–N View FIGURE 15 ).

Description. Body oval, rather stout ( Figs. 1E–G View FIGURE 1 , 4D–F View FIGURE 4 ); dorsum pale viridian, tinged with brown on posterior pronotum and clavus in fresh specimens ( Fig. 1E View FIGURE 1 ), with uniformly distributed, pale, simple, reclining setae ( Fig. 15B View FIGURE 15 ). Head olive green, shining; vertex narrow, with basal transverse carina that is rather flat and as thick as pronotal collar ( Fig. 15A View FIGURE 15 ); apical 1/3 of clypeus darkened ( Fig. 1F View FIGURE 1 ). Antenna pale brown, in fresh specimens tinged with red; segments III and IV brown; segment III longer than head width across eyes. Labium shiny reddish brown, slightly exceeding apex of mesocoxa ( Fig. 4E–F View FIGURE 4 ). Pronotum shining, somewhat brownish posteriorly; scent efferent system whitish green, with relatively thick peritreme ( Fig. 15D View FIGURE 15 ). Hemelytra with a pair of dark maculae on apex of corium; clavus tinged with brown; membrane pale smoky brown, partly speckled with brown spots. Coxae and legs yellowish green; tibiae and tarsi pale brown; apex of each tarsomere III darkened; meta-tarsomere II as long as III ( Fig. 15E View FIGURE 15 ); pretarsal structure as in Fig. 15F View FIGURE 15 . Ventral side of abdomen uniformly pale viridian ( Fig. 4E–F View FIGURE 4 ).

Male genitalia ( Figs. 9A View FIGURE 9 , 10E–F View FIGURE 10 , 15H–K View FIGURE 15 ): Parameres as in Fig. 10E–F View FIGURE 10 ; right paramere with conical apical protuberance on sensory lobe; vesica with tumid spiculum and relatively broad ventral sclerite ( Figs. 9A View FIGURE 9 , 15H View FIGURE 15 ).

Female genitalia ( Figs. 9E View FIGURE 9 , 10E–F View FIGURE 10 , 15L–O View FIGURE 15 ): Sclerotized rings thick-rimmed, elongate ovoid, mesially contiguous to each other ( Fig. 9E View FIGURE 9 , 15L View FIGURE 15 ); posterior wall as in Fig. 15M–O, E View FIGURE 15 ; anterior part of interramal sclerite with distinct field of spinules ( Fig. 15M–N View FIGURE 15 ).

Measurements: See Table 1 View TABLE 1 .

Etymology. Named for the type locality, Chika-no-shima [= ancient name of Goto Islands]; a noun in apposition.

Distribution. Japan (Goto Islands-Chain: Nakadori Island).

Biology. One male and two female adults of this new species were collected using UV light trap at night. No biological information is currently available.