Bioacoustics of Dactylopisthes

This genus includes 11 species of which Da. locketi and Da. mirabilis (Tanasevitch, 1985) are particularly similar based on several ambiguous characters from the phylogenetic analysis and the unambiguous synapomorphy ( Fig. 29 ): the anteriorly folded ventral plate (character 191; Fig. 22A ). Among the supporting homoplastic characters are the short, robust, blunt and twisted triangular inner suprategular apophysis (character 85, state 1); the distal suprategular apophysis that protrudes and covers the tegulum and exceeds the cymbium (character 90, state 0) and the prolateral radical apophysis (character 157). Another nine species, of which five have recently been described, are currently assigned to Dactylopisthes . Based on the figures available, Da. ramit Tanasevitch, 2023 seems to fit well to the above mentioned species ( Tanasevitch 2023b : figs 1–12, 14–15). According to Zhao & Li (2014 : figs 30–31) this is also true for Da. separatus Zhao & Li, 2014 only known from females. Dactylopisthes video ( Chamberlin & Ivie, 1947 ) ( Tanasevitch 1984 : pl. 5, figs 3–10) and Da. digiticeps ( Bosmans et al. 2009 : figs 1–6) can also be assigned to this group of species based on figures of the prolateral radical process, the form of the distal suprategular apophysis, the thin but long tibial apophysis and the anteriorly curved posterior ends of the dorsal plate in females. Dactylopisthes khatipara Tanasevitch, 2017 also shares most characters with Da. video according to Tanasevitch (2017 : figs 1–8). The assignments of Da. mirificus ( Georgescu, 1976 ) and Da. diphyus ( Heimer, 1987 ) are more difficult for the females since the anteriorly folded posterior tips of the ventral plate are not detectable on the figures. However, the males of Da. mirificus ( Georgescu 1976 : figs 1–13) and Da. diphyus ( Heimer 1987 : figs 4–8; Song et al . 1999 : fig. 91a–d) seem to have a prolateral radical process and the same type of tibial apophysis with a retrolateral appendix upon it. The cephalic PME lobes, even though smaller in Da. mirificus , are also similar to Da. video and Da. digiticeps . Dactylopisthes dongnai Tanasevitch, 2018 and Da. marginalis Tanasevitch, 2018 form a separate species group as already noted by Tanasevitch (2018 a , 2018b). They are morphologically quite outstanding from the other species of Dactylopisthes , lacking most of the typical characters ( Tanasevitch 2018a : figs 1–7, 2018b: figs 1–10).