Planaphrodes elongatus (Lethierry, 1876)

Tishechkin, D. Yu., 2019, Calling signal pattern vs. genitalia morphology in Planaphrodes Hamilton, 1975 (Homoptera: Auchenorrhyncha: Cicadellidae: Aphrodinae) - which trait evolves faster?, Russian Entomological Journal 28 (3), pp. 227-232 : 231

Planaphrodes elongatus (Lethierry, 1876)

Figs 8–14 .

MATERIAL. 1. Russia, extreme Southeast of Saratov Oblast, 2–3 km East of Ozinki Town, in the steppe near the pool, 5.VII.2004, signals of one male recorded at 26–27 °C ( Figs 8–11, 13 ) .

2. Russia, Astrakhan Oblast, Western Shore of the Baskunchak Lake , near Bol’shoy Bogdo Mtn., 4.VII.2005, signals of two males recorded at 29–30 °C ( Figs 12, 14 ) .

SIGNALS. Calling signal is a very long phrase lasting from 40–50 s up to 3–4 min and consisting of two different parts. The first part consists of syllables repeating with a period of about 400–800 ms; syllable pattern is somewhat similar to this in the signal of P. laevus (cf. Fig. 9 , the 1 st half of the oscillogram and Figs 1–2 ), but on high-speed oscillograms distinct interspecific differences are visible ( Figs 10– 12 and 3–6 ). Similarly to P. laevus , amplitude relation of two parts of a syllable can differ in different signals ( Figs 10–11 and 12 ). The second part of a phrase consists of partially merged short syllables with indistinct temporal pattern and repeating with a period of 40–70 ms.

PENIS SHAPE. The length ratio of the penis processes and their position are the same as in P. laevus , but the shape of penis stem is different ( Fig. 14 ).

Figures

Figs 1–14. Planaphrodes spp.: 1–7 — P. laevus; 8–14 — P. elongatus; 1–6 and 8–13 — oscillograms of male calling signals; 7 and 14 — penis, side view; 1, 3, and 7 — male from Altai Mts.; 2 and 4–6 — males from Moscow Oblast; 8–11 and 13 — male from Saratov Oblast; 12 and 14 — male from Astrakhan Oblast. Faster oscillograms of the parts of signals indicated as “3–4”, “9–11”, and “13” are given under the same numbers. Рис. 1–14. Planaphrodes spp.: 1–7 — P. laevus; 8–14 — P. elongatus; 1–6, 8–13 — осциллограммы приЗывных сигналов самца; 7, 14 — пенис сбоку; 1, 3, 7 — самец с АлтаЯ; 2, 4–6 — самцы иЗ Московской обл.; 8–11, 13 — самец иЗ Саратовской обл.; 12, 14 — самециЗ Астраханской обл. Фрагменты сигналов, обоЗначенные цифрами “3–4”,“9–11” и “13”, представлены на осциллограммах под такими же номерами.