Calling signal pattern vs. genitalia morphology in Planaphrodes Hamilton, 1975 (Homoptera: Auchenorrhyncha: Cicadellidae: Aphrodinae) - which trait evolves faster? Author Tishechkin, D. Yu. text Russian Entomological Journal 2019 2019-09-30 28 3 227 232 http://dx.doi.org/10.15298/rusentj.28.3.01 journal article 10.15298/rusentj.28.3.01 0132-8069 13163995 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 ).