Caliscelini, Amyot et Serville, 1843

Gnezdilov, Vladimir M., 2021, A new species of the genus Cylindratus Meng, Qin et Wang, 2020 from Northern Vietnam, with first description of 5 instar larva and a key to Vietnamese Caliscelini (Hemiptera: Fulgoromorpha: Caliscelidae), Zootaxa 4985 (4), pp. 531-541 : 532

Key to the Caliscelini of Vietnam (modified after Gnezdilov et al. 2014)

1. Coryphe elongate, with lateral margins converging at acute angle ( Figs 2, 5, 6 ). Metope with well developed median and sublateral carinae; median one running throughout postclypeus ( Figs 3 , 21 )................ Cylindratus fansipan sp. nov.

–. Coryphe nearly as wide between the eyes as long medially or transverse. Metope with another pattern of carination....... 2

2. Fore femora and tibiae foliately flattened.................................................................. 3

–. Fore femora and tibiae not flattened...................................................................... 4

3. Fore femora and tibiae flattened into an oval ( Figs 24, 25 ).............. Caliscelis (Cerepa) carnavalis Emeljanov, 2015

–. Fore femora and tibiae flattened into almost a circle ( Figs 26, 27 ).......... Caliscelis (Cerepa) gnezdilovi Emeljanov, 2015

4. Coryphe and metope joint at acute angle (in lateral view) ( Fig. 29 ). Metope 1.5 times as long at midline as wide between the eyes, with median carina. Coryphe with angularly convex anterior margin. First and second metatarsomeres each with one latero-apical spine................................................... Gelastissus hokutonis (Matsumura, 1916)

–. Coryphe and metope joint at obtuse angle (in lateral view) ( Fig. 28 ). Metope 1.2 times as wide between the eyes as long at midline, without median carina. Coryphe transverse, with widely truncate anterior margin. First and second metatarsomeres each with two latero-apical spines............................. Annamatissus tami Gnezdilov et Soulier-Perkins, 2014

Figures

FIGS 1–6. Cylindratus fansipan sp. nov. 1—male, holotype, lateral view; 2—male, holotype, dorsal view; 3—male, holotype, frontal view; 4—female, paratype, lateral view; 5—female, paratype, dorsal view; 6—female, paratype, dorsal view.

FIGS 21–22. Cylindratus fansipan sp. nov. 21—male holotype, head and pro- and mesonotum, in lateral view; 22—female paratype, pronotum, in dorsal view.

FIGS 24–29. Caliscelini, lateral view. 24—Caliscelis (Cerepa) carnavalis Emeljanov, 2015, male, paratype; 25—C. (C.) carnavalis Emeljanov, 2015, female, paratype; 26—C. (C.) gnezdilovi Emeljanov, 2015, holotype; 27—C. (C.) gnezdilovi Emeljanov, 2015, female, paratype; 28—Annamatissus tami Gnezdilov et Soulier-Perkins, 2014, holotype; 29—Gelastissus hokutonis (Matsumura, 1916), female.