Plautia ishigaki, Ishikawa & Moriya, 2019

Ishikawa, Tadashi & Moriya, Seiichi, 2019, A review of the stink bug genus Plautia Stål from Japan (Hemiptera, Heteroptera, Pentatomidae), Zootaxa 4564 (2), pp. 470-490 : 485-487

publication ID	https://doi.org/ 10.11646/zootaxa.4564.2.8
publication LSID	lsid:zoobank.org:pub:171E7B4D-773A-4A16-8C0F-3D23F6947A
DOI	https://doi.org/10.5281/zenodo.5922550
persistent identifier	https://treatment.plazi.org/id/03A687D8-FFD7-FFC1-E69C-906AFD9CF867
treatment provided by	Plazi
scientific name	Plautia ishigaki
status

Treatment

Plautia ishigaki Ishikawa & Moriya, sp. nov.

( Figs. 5 View FIGURES 1–5 , 18 View FIGURES 14–18 , 27 View FIGURES 19–27 , 32 View FIGURES 28–32 , 37 View FIGURES 33–37 , 42 View FIGURES 38–42 , 47 View FIGURES 43–47 , 52 View FIGURES 48–52 , 57 View FIGURES 53–57 , 62 View FIGURES 58–62 , 67 View FIGURES 63–67 , 72 View FIGURES 68–72 , 77 View FIGURES 73–77 , 84 View FIGURES 78–84 )

Diagnosis. Among the species of Plautia , this pentatomid is recognized by the following combination of characters: body 6.7–8.8 mm long, glossed ( Fig. 5 View FIGURES 1–5 ); antennal segment III blackish in apical 1/3 ( Fig. 5 View FIGURES 1–5 ); antennal segment IV blackish in apical half ( Fig. 5 View FIGURES 1–5 ); punctures on disc of pronotum and scutellum brownish and weak, sparser and much smaller than punctures on coria of fore wings ( Fig. 18 View FIGURES 14–18 ); lateral margins of pronotum brownish and weakly edged ( Figs. 18 View FIGURES 14–18 , 27 View FIGURES 19–27 ); brownish line of lateral margin of pronotum irregularly interrupted ( Fig. 27 View FIGURES 19–27 ); transverse ridge of genital capsule visible from ventral rim in ventral view ( Figs. 32 View FIGURES 28–32 ); lateral lobe of crown of paramere strongly extended laterad, nearly truncate at apex, with roundly concave distal and proximal margins ( Fig. 47 View FIGURES 43–47 ); conjunctival processes of endosoma thick and short, curved ventrad ( Figs. 52 View FIGURES 48–52 , 57 View FIGURES 53–57 , 62 View FIGURES 58–62 , 67 View FIGURES 63–67 ); processes of vesica Y-shaped in ventral view, roughly heart-shaped in outline in posterior view ( Figs. 57 View FIGURES 53–57 , 67 View FIGURES 63–67 ); sclerotized zone of intermediate part of spermatheca approximately 1/8 as long as intermediate part ( Fig. 84 View FIGURES 78–84 ).

Description. Male. Coloration. Body generally yellowish green, glossed ( Fig. 5 View FIGURES 1–5 ). Punctures on pronotum and scutellum generally brownish and punctures on coria generally blackish ( Fig. 18 View FIGURES 14–18 ). Head with short longitudinal blackish line above anteniferous tubercle ( Fig. 27 View FIGURES 19–27 ). Antennal segments I and II yellowish green; segment III yellowish green to brownish yellow in basal 2/3 and blackish in apical 1/3; segment IV yellowish green to brownish yellow in basal half and blackish in apical half; segment V brownish yellow in basal 1/3 and in apical 1/ 5, and blackish from basal 1/3 to apical 1/5. Labium brownish yellow, with blackish apical part. Pronotum brownish along lateral margins ( Fig. 27 View FIGURES 19–27 ); brownish line of lateral margin sometimes irregularly interrupted or partly obscure. Apical part of scutellum whitish ( Figs. 5 View FIGURES 1–5 , 18 View FIGURES 14–18 ). Corium of fore wing except antero-marginal area greyish pale yellow, with a few obscure irregular markings ( Figs. 5 View FIGURES 1–5 , 18 View FIGURES 14–18 ); membrane of fore wing transparent, tinged with pale brown ( Fig. 5 View FIGURES 1–5 ). Legs yellowish green; tarsi yellowish green to brownish yellow; claws brownish yellow in basal half and black in apical half; pulvilli dark brown, tinged with green. Posterolateral corners of abdominal segments III to VII narrowly and distinctly dark brown.

Structure. Head finely punctate, weakly and densely rugose, a little more than 3/4 as long as width across eyes; interocular space approximately 3 times as wide as eye in dorsal view. Bucculae roundly convex ventrad in anterior 1/3, pointed at anterior 1/5, gradually tapering posteriad in posterior 2/3. Antenna 3/4 as long as body length (to apex of abdomen), sparsely covered with short, erect and suberect setae in segments I, II and basal half of III, and densely in segments IV, V and apical half of III; approximate proportion of segments I to V 1.0: 1.7: 2.0: 2.9: 3.1. Labium reaching abdominal segment III; approximate proportion of segments I to IV 1.0: 1.6: 1.4: 1.1.

Pronotum ( Fig. 18 View FIGURES 14–18 ) along midline approximately 1.2 times as long as head, approximately 2/5 as long as humeral width; disc of pronotum punctate; these punctures small and weak ( Fig. 18 View FIGURES 14–18 ); width across humeri 2.2 times as much as width across eyes; humeral angle round, slightly projected laterad; lateral margin straight, weakly edged, with sparse fine setae. Scutellum ( Fig. 18 View FIGURES 14–18 ) as long as its basal width, punctate as in pronotum. Fore wings exceeding apex of abdominal segment VII by approximately 1/10 of its length ( Fig. 5 View FIGURES 1–5 ); punctures of coria denser and much larger than punctures of pronotum and scutellum ( Fig. 18 View FIGURES 14–18 ).

Abdomen (from base of segment III to apex of segment VII) approximately 7/10 as long as its maximum width. Genital capsule ( Figs. 37 View FIGURES 33–37 , 42 View FIGURES 38–42 ) approximately 2.3 times as wide at maximum as its basal width, as long as its maximum width, roundly produced at posterior angles; ventral rim ( Figs. 32 View FIGURES 28–32 , 37 View FIGURES 33–37 ) widely and roundly concave; concavity of ventral rim approximately 1/5 as deep as its maximum width ( Fig. 37 View FIGURES 33–37 ); transverse ridge well developed, visible from ventral rim in ventral view ( Fig. 32 View FIGURES 28–32 ), with gently concave dorsal margin in posterior view ( Fig. 42 View FIGURES 38–42 ); dorsal sclerites semitriangular, with acute ventral angle ( Fig. 42 View FIGURES 38–42 ); dorsal sinus subpentagonal in posterior view ( Fig. 42 View FIGURES 38–42 ); paramere sockets circular in posterior view ( Fig. 42 View FIGURES 38–42 ). Crown of paramere ( Fig. 47 View FIGURES 43–47 ) subpentagonal, covered with long setae on lateral lobe, round at apex; inner margin straight; distal and proximal margins roundly concave; lateral lobe strongly extended laterad, truncate at apex. Conjunctival processes of endosoma ( Figs. 52 View FIGURES 48–52 , 57 View FIGURES 53–57 , 62 View FIGURES 58–62 , 67 View FIGURES 63–67 ) thick and short, curved ventrad, tapering, obtuse at apex. Vesica gently curved in lateral view ( Fig. 62 View FIGURES 58–62 ). Processes of vesica relatively small, Y-shaped in ventral view ( Fig. 57 View FIGURES 53–57 ), circular in lateral view ( Fig. 62 View FIGURES 58–62 ), roughly heart-shaped in outline in posterior view ( Fig. 67 View FIGURES 63–67 ).

Female. Similar to the male. Body relatively larger than male. Valvifer VIII generally yellowish green ( Fig. 72 View FIGURES 68–72 ), covered with short to long setae in apical half ( Fig. 77 View FIGURES 73–77 ); apical angle a little more acute than right angle ( Fig. 77 View FIGURES 73–77 ). Spermatheca long; apical receptacle ( Fig. 84 View FIGURES 78–84 ) spherical, with 1 horn-shaped process; horn-shaped process produced laterad of apical receptacle, abruptly curved basad, exceeding distal flange; intermediate part ( Fig. 84 View FIGURES 78–84 ) parallel-sided, approximately 4.5 times as long as its width at middle, with sclerotized zone apically; apical sclerotized zone of intermediate part approximately 1/8 as long as intermediate part ( Fig. 84 View FIGURES 78–84 ); distal flange a little narrower than proximal flange ( Fig. 84 View FIGURES 78–84 ).

Measurements [in mm, ♂ (n=7) / ♀ (n=16). Body length 6.7–7.8 (holotype 7.4) / 7.5–8.8; width across eyes 2.1–2.4 / 2.3–2.5; width across humeral width 4.7–5.3 / 5.1–5.8; maximum width of abdomen 4.6–5.1 / 5.1–5.3.

Type series. Holotype: ♂ ( Fig. 5 View FIGURES 1–5 ), “[ JAPAN] Hirae-Chisokobaru, Ishigaki-jima Is., the Ryukyus, N24.3825 E124.1917, 15. IX. 2010, light trap, Hirosato Kodama” (LETUA IC 2018-00001) ( TUA). GoogleMaps

Paratypes (6♂ 16♀). JAPAN, the Ryukyu Islands , Ishigaki-jima Is. —same locality as holotype GoogleMaps : 1♂ 1♀, 24. IX. 2008, Tsunaki Ando (LETUA IC 2018-00002–00003) ( TUA) , 1♂, 13. VII. 2010, Hirosato Kodama (LETUA IC 2018-00004) ( TUA) , 1♀, 6. IX. 2010, Hirosato Kodama (LETUA IC 2018-00005) ( TUA) , 1♀, 4. X. 2010, Hirosato Kodama (LETUA IC 2018-00006) ( TUA) , 1♀, 10. X. 2010, Hirosato Kodama (LETUA IC 2018-00007) ( TUA) , 1♀, 30. VI. 2013, Rie Ukuda (LETUA IC 2018-00008) ( TUA) , 1♀, 25. VII. 2013, Rie Ukuda (LETUA IC 2018-00009) ( TUA) , 1♂, 15 VIII. 2013, Rie Ukuda (LETUA IC 2018-00010) ( TUA) , 1♂, 20. VIII. 2013, Rie Ukuda (LETUA IC 2018-00011) ( TUA) , 1♂, 24. VIII. 2013, Rie Ukuda (LETUA IC 2018-00012) ( TUA) , 3♀, 25. VIII. 2013, Rie Ukuda (LETUA IC 2018-00013–00015) ( TUA) , 1♀, 8. IX. 2013, Rie Ukuda (LETUA IC 2018- 00016) ( TUA) , 1♀, 9. IX. 2013, Rie Ukuda (LETUA IC 2018-00017) ( TUA) ; — Hirae , 24.38284N 124.19233E GoogleMaps : 1♀, 22. VII. 2012, collector unknown (LETUA IC 2018-00018) ( TUA) , 1♀, 1. VIII. 2 0 17, Ayako Yamaguchi (LETUA IC 2018-00019) ( TUA) , 1♀, 3. VIII. 2 0 17, Ayako Yamaguchi (LETUA IC 2018-00020) ( TUA) , 1♂, 3. IX. 2017, Ayako Yamaguchi (LETUA IC 2018-00021) ( TUA) ; — Hirae , 24.38904N 124.19505E GoogleMaps : 1♀, 23. VI. 2017, Kiichi Shimizu (LETUA IC 2018-00022) ( TUA) , 1♀, 30. VIII. 2017, Kiichi Shimizu (LETUA IC 2018- 00023) ( TUA) . All the paratypes were collected by light traps .

Distribution. Ishigaki-jima Island of the Ryukyu Islands, Japan.

Etymology. The specific epithet is named for the type locality, Ishigaki-jima Island, one of islands in the Ryukyu Islands, Japan; a noun in apposition.

Remarks. In general appearance, this new species is very similar to P. crossota (Dallas, 1851) . However, P. ishigaki sp. nov. is distinguished from P. crossota by its relatively smaller body length (6.7–8.8 mm vs. 8.0–11.0 mm), the lateral margins of pronotum brownish ( Fig. 27 View FIGURES 19–27 ) (vs. blackish), the middle part of the ventral rim of genital capsule roundly concave ( Fig. 32 View FIGURES 28–32 ) (vs. slightly convex), and the lateral lobe of the crown of paramere truncate at apex ( Fig. 47 View FIGURES 43–47 ) (vs. triangularly projected).