Physatocheila distinguenda Jakovlev, 1880

Ji, Hankyul, Kim, Junggon, Jang, Geunho & Jung, Sunghoon, 2023, A taxonomic review of the genus Physatocheila Fieber (Hemiptera: Heteroptera: Tingidae) from the Korean Peninsula, with description of a new species and a key to Korean Physatocheila species, Zootaxa 5258 (4), pp. 455-464 : 457-458

publication ID	https://doi.org/ 10.11646/zootaxa.5258.4.6
publication LSID	lsid:zoobank.org:pub:E0CCE7C3-CF8D-497D-8CE0-F955932EAD6F
DOI	https://doi.org/10.5281/zenodo.7784625
persistent identifier	https://treatment.plazi.org/id/03A96056-FF94-3744-F088-DE59B414FCC2
treatment provided by	Plazi
scientific name	Physatocheila distinguenda Jakovlev, 1880
status

Treatment

Physatocheila distinguenda Jakovlev, 1880 View in CoL

( Figs. 1B View FIGURE 1 , 2B View FIGURE 2 , 4B View FIGURE 4 , 5B View FIGURE 5 , 6B View FIGURE 6 )

Monanthia (Physatocheila) distinguenda Jakovlev, 1880: 139 .

Stephanitis salicorum Baba, 1925: 3 (syn. Golub, 1976: 29).

Physatocheila hailarensis Nonnaizab, 1985: 226 View in CoL (syn. Golub, 1987: 54).

Diagnosis. Body brown with pale parts, elongated ( Fig. 1B View FIGURE 1 ); paranota largely developed, maximal width from anterolateral margin to inner margin much wider than the minimal width between paranota, inner margin covering lateral carinae; lateral carinae converging anteriorly at medial part of pronotum, with five to seven rows of areolae in dorsal view ( Fig. 2B View FIGURE 2 ); hemelytra with mottled dark markings; costal area with two rows of areolae, areolae size not consistent, areolae in outer part larger, except for those of middle part; areolae size of discoidal area distinctly larger than those of subcostal area ( Fig. 4B View FIGURE 4 ); middle part of inner margin of paramere slightly convex ( Fig. 5B View FIGURE 5 ); middle part of outer margin of pygophore slightly sinuate ( Fig. 6B View FIGURE 6 ).

Description. Male: Body partly brown and dark brown, elongated.

Head brown, with five spines; antennae brown; first segment as equal to second segment in length, stout; third segment less than 3X fourth segment in length; fourth segment dark brown; hood brown, middle part of anterior margin produced anteriorly.

Pronotum pale to brown; paranota brown with darker marking, largely developed, maximal width from anterolateral margin to inner margin much more than the minimal width between paranota, inner margin covering lateral carinae on pronotum; lateral carinae slightly converging anteriorly; areolae of paranota similar in size.

Hemelytra generally brown with dark mottled markings, slightly wider than maximum width of pronotum, outer margin slightly curved in middle part, not rounded; costal area with two rows of areolae, except for one row in posterior part, areolae size consistent from basal to middle part, areolae of outer part in posterior part of costal area much larger; subcostal area with small areolae, areolae distinctly smaller than those of costal and discoidal areas.

Genitalia: paramere scythe-shaped; sensory lobe thick, inner margin slightly convex; apophysis rounded, distinctly shorter than inner margin of sensory lobe ( Fig. 5B View FIGURE 5 ); pygophore relatively smoothly angulated posterolaterally; middle part of outer margin slightly sinuate ( Fig. 6B View FIGURE 6 ).

Female: Head, pronotum, hemelytra: As in male. Genitalia: not examined

Measurements. (3♁♁/ 3♀♀). Head width, 0.46–0.48/ 0.46–0.50; vertex width, 0.23–0.25/ 0.25–0.26; lengths of antennal segments, I–IV: 0.12–0.13/ 0.13–0.14, 0.12–0.13/0.13–0.14, 0.92–0.96/ 0.97–1.01, 0.37–0.39/ 0.38–0.40; total length of antenna, 1.53–1.61/1.61–1.69; pronotum length, 1.23–1.29/ 1.27–1.30; pronotum width (including the posterior margin of paranota), 0.83–0.85/ 0.85–0.89; hemelytra length, 2.30–2.39/ 2.37–2.44; body length, 3.21–3.30/ 3.29–3.35.

Distribution. China, Japan, Kazakhstan (Asian part), Kirgizia, Korea, Mongolia, Russia ( Péricart & Golub, 1996; Aukema et al. 2013; Souma, 2019).

Hosts. Salix alba , S. bebbiana , S. rosmarinifolia , S. purpurea (Salicaceae) ( Golub, 1988).

Material examined. [ CNU] 5♁♁ 10♀♀ Ryongak-san (Mt), 12 km W of Pyongyang, North Korea, 19.viii.1977, M. Josifov; [ CNU] 1♀ Bukchang-ri , Jeoksang-myeon, Muju-gun, Jeollabuk-do, Korea, 7.iv. 2016, HK Ji .

Remarks. The specimens examined from the Korean Peninsula by M. Josifov and authors show consistent morphology in the structure of the costal area, including the areolae structures. Recently, Souma (2019) and Souma & Ishikawa (2022) presented P. distinguenda from Japan possessing different external morphology, pale body and the costal area with similar areolae in size in two rows (Fig. 8C in Souma & Ishikawa (2022)) but the same structure of pygophore and parameres (Figs. 17E, 18E in Souma & Ishikawa (2022)). This may suggest the Korean population has variation of costal area structure or these populations may not be conspecific.