Elbenia, Stal, 1876

Gorochov, A. V., 2023, Taxonomy of the katydids (Orthoptera: Tettigoniidae) from East Asia and adjacent islands. Communication 16, Far Eastern Entomologist 485, pp. 7-28 : 9-10

Key to subgenera of Elbenia s. l.

1. Male last tergite with a pair of distinct posterior lobes or spines (Figs 13, 17, 24, 29, 35, 38, 39, 43, 46, 52, 56, 57, 63, 69, 70, 75, 92, 98, 102, 105, 108, 112, 117, 118, 123, 132– 134, 143, 150) ………………...... .............................................……….......…………… 2

– Male last tergite with one posteromedian lobe (Fig. 61). [Composition: only type species Elbenia dyscrita Karny, 1926 (Figs 61, 62) from Penang I. Etymology: from Latinized Greek prefix “hemi-” and generic name Elbenia , gender feminine.] ............................... ................................................................… subgenus Hemielbenia Gorochov , subgen. n.

2. Male cerci more or less S-shaped, with apical parts curved laterally (Figs 13, 16, 17, 24, 29,34,37,39,43,46,52,56,57) …………..………...…………………….…………… 3

– Male cerci more or less arcuate, with apical parts directed medially ( Figs 63, 69, 70, 75 , 92, 98, 103, 105, 108, 112, 113, 114, 117, 118, 123, 127, 129, 134, 138, 144, 150) ............. 4

3. Male genital plate long, i.e. with more or less long posterior lobes slightly or strongly curved upwards, and with posteromedian notch not shorter than half of length of this plate (Figs 14, 15, 18, 19, 25, 26, 30, 31, 33, 34, 40, 41, 44, 45, 47, 48, 51, 53, 54, 55). [Composition: type species Tamdaopteron major Gorochov, 2005 (Figs 22–28) from Vietnam; Elbenia appendiculata Brunner-Wattenwyl, 1898 (Figs 39–45) and E. smedleyi Karny, 1926 (Figs 54–56) from Sumatra; E. robinsoni Karny, 1926 (Figs 33–35) and E. pendleburyi Karny, 1926 (Figs 51–53) from Malay Peninsula; T. minor Gorochov, 2005 (Figs 17–21) from Vietnam; E. (T.) ryabovi sp. n.; E. (T.) daedala sp. n.; E. (T.) subrecta sp. n.; possibly E. jacobsonii Karny, 1926 (Figs 36–38) from Sumatra. Gender masculine.] …..... ...........................… subgenus Tamdaopteron Gorochov, 2005, stat. n.

– Male genital plate rather short and almost straight in profile as well as with posteromedian notch distinctly shorter than half of length of this plate (Figs 58, 59). [Composition: only type species Elbenia javanica Karny, 1926 (Figs 57–60) from Java. Etymology: from Java I. and genus Tamdaopteron , gender masculine.] ....................................................... ....................................................................... subgenus Javapteron Gorochov , subgen. n.

4. Male genital plate rather short and with short posteromedian notch as well as without distinct subapical denticles, or this plate long and with more or less long posterior lobes often curved upwards ( Figs 64, 65, 69, 71, 72, 76, 77 , 93, 94, 99–101, 103, 104, 106, 107, 109, 110, 111, 112, 115, 116, 119, 120, 125, 126, 135, 136). [Composition: type species Elbenia nigrosignata Stål, 1876 (possibly Fig. 69 ) from Malay Peninsula; E. tenera Brunner-Wattenwyl, 1878 (possibly Figs 123–132), E. brevixipha Brunner-Wattenwyl, 1898 (Figs 111, 112) and E. borneensis Karny, 1926 (Figs 133 and possibly 134–138) from Borneo; E. modesta Brunner-Wattenwyl, 1891 (Figs 108–110), E. serraticauda Hebard, 1922 (Figs 92–96) and Furnia bakeri Karny, 1926 (Figs 115–117) from Philippines; Elbenia digitata Karny, 1926 (Figs 118–120) from Sumatra; E. (E.) carinata sp. n.; E. (E.) semicarinata sp. n.; E. (E.) apicata sp. n.; E. (E.) paradigitata sp. n.; E. (E.) eudigitata sp. n.; E. (E.) neodigitata sp. n.; possibly E. fusca Karny, 1923 (Fig. 113) from Borneo ( OSF) as well as E. fissa Karny, 1923 (Fig. 114) and E. fraser Tan, 2014 from Malay Peninsula. Gender feminine.] ................. subgenus Elbenia s. str.

– Male genital plate rather short, almost straight in profile, with posteromedian notch much shorter than half of length of this plate, and with a pair of distinct inner subapical denticles directed to each other ( Figs 144–147, 151, 152 ). [Composition: type species Elbenia (Aequapteron) appressa sp. n. ( Figs 140–149 ) from Borneo; E. bispinosa Karny, 1923 ( Figs 150–152 ) from Malay Peninsula. Etymology: from “aequator” (equator) and generic name Tamdaopteron , gender masculine.] ........................................................... .................................................................... subgenus Aequapteron Gorochov , subgen. n.

Figures

Figs 63–79. Elbenia (Elbenia), male: 63–68 – E. (E.) carinata sp. n.; 69 – E. (E.)?nigrosignata (Stål); 70–74 – E. (E.) apicata sp. n.; 75–79 – E. (E.) semicarinata sp. n. Male abdominal apex from above (63, 70, 75), from below (64, 71, 76), from side (65, 72, 77) and from behind (66, 67, 69, 73, 78); left lobe (68, 74) or both lobes (79) of genital plate from behind. [69, after Karny (1923).]

Figs 139–152. Elbenia: 139 – E. (Elbenia) eudigitata sp. n.; 140–149 – E. (Aequapteron) appressa sp. n.; 150–152 – E. (Ae.) bispinosa Karny. Teeth of left male stridulatory vein from below (139, 140); left (141) and right (142) dorsal fields of male tegmina; male abdominal apex from above (143, 150), from below (144, 151), from side and slightly below (145), and from side (152); distal parts of male last tergite lobes and male genital plate from side (146); apex of latter plate from behind (147); female last tergite with genital plate from below (148); female abdominal apex with ovipositor from side (149). [150–152, after Karny (1926a).]