Cryptostemma, Herrich-Schaeffer, 1835

Yamada, Kazutaka & Hayashi, Masami, 2019, Two new species of the genus Cryptostemma from Japan (Hemiptera: Heteroptera: Dipsocoridae), Acta Entomologica Musei Nationalis Pragae 59 (2), pp. 381-390 : 388

Key to the East Palaearctic species of Cryptostemma (male characters)

1. Right laterotergite VIII elongate, slender; sternite VIII much shorter than half length of pygophore. ................ ........................................... C. wygodzinskyi Wu, 1967

– Right laterotergite VIII very large, U-shaped ( Figs 11, 15 , 20, 24 ); sternite VIII very large, approximately as long as or longer than maximum length of pygophore ( Figs 12 , 21 ). .................................................................... 2

2. Anterior process of U-shaped right laterotergite VIII knife-shaped, not bifurcated ( Figs 20, 24 ). ..................... ..................................................... C. pavelstysi sp. nov.

– Anterior process of U-shaped right laterotergite VIII apically mitten-shaped or bifurcated ( Figs 11, 15 ). ... 3

3. Lefi side of sternite VII branched in middle ( Fig. 13 ); lefi laterotergite VIII expanded at apex, with triangular subapical flange ( Figs 11, 14 ); posterior process of U-shaped right laterotergite VIII slender and narrowed apicad ( Fig. 15 ). ......................... C. miyamotoi sp. nov.

– Lefi side of sternite VII spatulate, apically truncated; lefi laterotergite VIII not expanded at apex, with no flange; posterior process of U-shaped right laterotergite VIII bearing elongate process basally and bifurcated at apex. .......................................... C. digitum Wu, 1967

Figures

Figs 11‒19. Morphological details of Cryptostemma miyamotoi sp. nov., male (11‒18) and female (19). 11‒12 – abdomen (mediotergite II and sternite II omitted), dorsal (11) and lateral (12) views; 13 – left side of sternite VII, laterodorsal view; 14 – left laterotergite VIII, laterodorsal view; 15 – right laterotergite VIII, laterodorsal view; 16‒17 – left paramere, dorsal and anterior views; 18 – right paramere, dorsal view; 19 – spermatheca.Abbreviations: adpp = anterodorsal projection of pygophore; an = anophore; app = apical process of paramere; bpp = basal process of paramere; g = spermathecal gland; lp = left paramere; lt4‒8 = laterotergite IV‒VIII; mt8 = mediotergite VIII; py = pygophore; rp = right paramere; sc = seminal capsule; st4, 7, 8 = sternite IV, VII, VIII. Scale bars = 0.2 mm for 11‒12; 0.1 mm for 13‒18; 0.05 mm for 19.

Figs 20‒28. Morphological details of Cryptostemma pavelstysi sp. nov., male (20‒27) and female (28). 20‒21 – abdomen, dorsal (20) and lateral (21) views; 22 – left side of sternite VII, laterodorsal view; 23 – left laterotergite VIII, laterodorsal view; 24 – right laterotergite VIII, laterodorsal view; 25‒26 – left paramere, dorsal and anterior views; 27 – right paramere, dorsal view; 28 – spermatheca.Abbreviations: adpp = anterodorsal projection of pygophore; an = anophore; app = apical process of paramere; bpp = basal process of paramere; dag = dorsal abdominal gland scars; g = spermathecal gland; lp = left paramere; lt4–8 = laterotergite IV–VIII; mt8 = mediotergite VIII; py = pygophore; rp = right paramere; sc = seminal capsule; st4, 5, 7, 8 = sternite IV, V, VII, VIII. Scale bars = 0.2 mm for 20‒21; 0.1 mm for 22‒27; 0.05 mm for 28.