Macropsis remota Tishetshkin, 1998

Tishechkin, D. Yu., 2019, Leafhoppers of the genus Macropsis Lewis, 1836 (Homoptera: Auchenorrhyncha: Cicadellidae: Macropsinae) on Sakhalin - different evolutionary trends in different species, Russian Entomological Journal 28 (2), pp. 107-119 : 114

4. Macropsis remota Tishetshkin, 1998

Figs 29–31 , 92–99, 148–149.

COLORATION. Brown or dark brown, usually with dark pattern on pro- and mesonotum ( Figs 29–31 ).

MALE ABDOMINAL APODEMES AND PENIS. Abdominal apodemes of 2 nd tergite rounded or somewhat angular (Figs 92–93). Sternal apodemes strongly convergent, separated by narrow notch (Figs 94–95). Apodeme tips round- ed, but situated almost horizontally and for this reason often look pointed in frontal view (Figs 96–97). Penis rather slen- der, with long and almost straight distal part (Figs 98–99).

HOST PLANTS. Salix schwerinii , occasionally, also S. udensis .

MALE CALLING SIGNAL. Calling signal is a single phrase lasting from 7–10 to ca. 20 s ( Fig. 148 ). Its main part consists of syllables following each other with a period from about 0.5 to 2 s ( Fig. 149 , the first half of the oscillogram); quite often the syllable repetition period decreases towards the end of the signal. The phrase ends with a sequence of high-amplitude click-like pulses and 2–6 short syllables consisting of one high-amplitude and ca. 10–20 low-amplitude pulses each ( Fig. 149 , the second half of the oscillogram).

RANGE. Sakhalin. Records from the mainland [ Tishechkin, 1998, 1999] are evidently erroneous.

REMARKS. Was described based on five specimens from South Sakhalin; with some doubt we included into the type series several specimens from the Southern part of Primorsky Krai [ Tishechkin, 1998]. Investigation of a large material and also, of host preferences and male calling signals of specimens from South Sakhalin lead us to the conclusion, that identification of specimens from the mainland is doubtful. Therefore , at present, only populations from Sakhalin can be attributed to this species with certainty .

Differs from the mainland sister species, M. flavida Vilbaste, 1980 , by the shape of sternal apodemes (Figs 94–97 and 102–104), more narrow and elongated penis (Figs 98–99 and 105–106), and body length (4.6–5.0 mm in males and 5.0–5.6 mm in females versus 3.7–4.7 mm and 4.0–5.0 mm, respectively, in M. flavida ). Also, in M. remota coloration is much less variable than in M. flavida ( Figs 29–31 and 32–38 ).

M. remota was found only on two willow species from the section Vimen ( S. schwerinii and S. udensis ), whereas M. flavida was collected from many species from the sections Vimen ( S. schwerinii and S. udensis ), Vetrix ( S. bebbiana Sarg. and S. abscondita Laksch. ), Arbuscella ( S. rhamnifolia Pall. ), Daphnella ( S. rorida Laksch. ), Helix ( S. ledebouriana Trautv. and S. miyabeana Seem. ), and Glaucae ( S. glauca L.). Thus, M. flavida and M. remota share common host plants, but in M. remota host specialization is much narrower than in M. flavida .

Interestingly, despite all morphological and ecological differences, calling signal patterns in these two species are identical ( Figs 148–149 and 150–153 ).

Figures

Figs 29–53. Macropsis spp: 29–31 — M. remota; 32–38 — M. flavida; 39–47 — M. hinganensis (39–44 — specimens from Sakhalin, 45–47 — specimens from the mainland); 48–53 — M. fuscula (48 — specimen from Sakhalin, 49–50 — specimens from Kunashir, 51 — specimen from Khabarovsk Krai, 52 — specimen from Southern Kazakhstan, 53 — specimen from Moscow Oblast). Рис. 29–53. Macropsis spp: 29–31 — M. remota; 32–38 — M. flavida; 39–47 — M. hinganensis (39–44 — ЭкЗемплЯры с Сахалина, 45–47 — ЭкЗемплЯры с материка); 48–53 — M. fuscula (48 — ЭкЗемплЯр с Сахалина, 49–50 — ЭкЗемплЯры с КунаШира, 51 — ЭкЗемплЯр иЗ Хабаровского краЯ, 52 — ЭкЗемплЯр иЗ Южного КаЗахстана, 53 — ЭкЗемплЯр иЗ Московской обл.).

Figs 142–153. Oscillograms of male calling signals: 142–147 — Macropsis costalis; 148–149 — M. remota; 150–153 — M. flavida; 142–144, 148–149 — males from Sakhalin; 145–147, 150–153 — males from the mainland. Faster oscillograms of the parts of signals indicated as “143–144”, “146–147”, “149”, “151”, and “153” are given under the same numbers. Рис. 142–153. Oscillograms of male calling signals: 142–147 — Macropsis costalis; 148–149 — M. remota; 150–153 — M. flavida; 142–144, 148–149 — самцы с Сахалина; 145–147 и 150–153 — самцы с материка. Фрагменты сигналов, обоЗначенные цифрами “143–144”, “146–147”, “149”, “151” и “153” представлены на осциллограммах под такими же номерами.