Subtilodecma Gorochov, 2022

Gorochov, A. V., 2022, Taxonomy of the katydids (Orthoptera: Tettigoniidae) from East Asia and adjacent islands. Communication 15, Far Eastern Entomologist 459, pp. 1-26 : 3

Genus Subtilodecma Gorochov , gen. n.

https://zoobank.org/NomenclaturalActs/ 468FB159-8EC4-45CB-B040-37625214361E

Type species: Subtilodecma unilobata sp. n.

DIAGNOSIS. Body small and slender. Head short, with moderately flattened and almost not oblique anterior surface; rostrum with short and angular or finger-like upper tubercle reaching only basal part of scape and having more or less distinct dorsomedian groove; eyes rather large, almost round; ocelli indistinct; scape approximately twice as wide as space between antennal cavities; maxillary palpus moderately long and thin, with apical segment slightly shorter than longest subapical one ( Figs 1, 2, 8, 9 ). Pronotum much longer than head,

low, with anterior edge of disc barely convex, its posterior edge rounded, all ventral edges somewhat arcuate, lateral lobes practically vertical, and hind lobe long in male (reaching middle of tegminal stridulatory apparatus) and slightly shorter in female as well as practically not separated from rest of pronotum in both sexes ( Figs 1, 2, 8, 9 ). Legs rather long and thin;

all femora without spines and spinules on both apical lobules; fore leg with very short coxal spine or almost without it, and with a pair of large and oval tympana which almost equal to each other in size and located on a pair of rather long and slightly concave tibial areas; hind leg with femur somewhat thickened in proximal half, i.e. clearly adapted to jumps. Tegmina shortened, reaching middle part of abdomen, with widely rounded apices, and with well developed stridulatory apparatus in male ( Figs 1, 2, 8, 9 ); hind wings not exposed behind tegmina. Last tergite rather simple in both sexes, with almost truncate (slightly sinuate)

posterior edge; male cercus not large but significantly elongate (distinctly longer than female cercus which typical of this tribe in shape), with almost lamellar and lobule-like or shortly bilobate distal part somewhat curved medially; epiproct small, rounded or roundly angular distally and almost equal to rounded paraprocts in length; genital plate rather long, strongly narrowed in distal half, with even narrower apical part and thin styles around it ( Figs 3–5,

10–13); genitalia membranous.

INCLUDED SPECIES. Type species; S. bilobata sp. n.

COMPARISON. The new genus is somewhat similar to the genera Cecidophagula Uvarov,

1939 and Thaumaspis Bolivar, 1900 in the general appearance (including the tegminal structure) but distinguished by the following combination of features: the pronotum is with a distinctly longer anterior lobe than in Cecidophagula , and with the lateral lobes situated in clearly vertical position (in Thaumaspis , these lobes are in somewhat oblique position, i.e.

they are directed downwards/laterally but not only downwards); the male last tergite lacks distinct specializations; the male cerci are rather simple (without distinct processes or lobes,

except for small apical lobules); the male genital plate is characteristically narrowed in the distal half having a very narrow apical part between the styles. From the other similar genera,

Subtilodecma gen. n. differs in the same combination of characters as well as a moderately long apical segment of the maxillary palpus or the absence of spines on the apical femoral lobules.

ETYMOLOGY. This generic name originates from the Latin word “subtilis” (subtle,

thin) and the generic name Decma .

Figures

Figs 1–13. Subtilodecma gen. n.: 1–7 – S. unilobata sp. n.; 8–13 – S. bilobata sp. n. Male