Lipotactes (Lipotactes) sumatranus, Gorochov, 2021

Gorochov, A. V., 2021, Taxonomy of the katydids (Orthoptera: Tettigoniidae) from East Asia and adjacent islands. Communication 14, Far Eastern Entomologist 434, pp. 1-25 : 10-12

Lipotactes (Lipotactes) sumatranus Gorochov, sp. n.

http://zoobank.org/NomenclaturalActs/ 04AB18D1-0633-4E82-8B6B-366D18EB7CE5

Figs 11–15 , 36–39 , 80

MATERIAL. Holotype – ♂, Indonesia: Sumatra I., Aceh Prov. near border with North Sumatra Prov., environs of Ketambe Vill. on Alas River near Gunung

Leuser National Park, 3º41–42ʹN, 97º38–39ʹE, 300–500 m, primary forest, 15–24.IV

2018, A. Gorochov, M. Berezin, I. Kamskov, E. Tkatsheva. Paratypes: 1 ♂, 2 ♀,

same data as for holotype; 1 ♀, same country and island, North Sumatra Prov. , ~80

km W of Medan City, environs of Bukit Lawang Vill. on Bohorok River near Gunung

Leuser National Park, 3º32–33ʹN, 98º6–7ʹE, secondary forest, 6–14.IV 2018, A.

Gorochov, M. Berezin, I. Kamskov, E. Tkatsheva.

DESCRIPTION. Male (holotype). Body medium-sized for this genus but slightly larger than in L. (L.) alienus . Coloration yellowish with following marks: head with two small brownish rose spots on rostrum, light brown dorsum between eyes (this light brown area with median yellowish line and a pair of brown spots near eyes)

and a pair of dots in dorsolateral corners of clypeus as well as posterolateral margins of epicranium, brown apices of palpi as well as narrow rings on scape and pedicel around their apices, and dark brown antennal flagellum; pronotum with dark brown anterior margin of disc, a pair of sinuate brown transverse lines on disc near this edge, two pairs of brown to light brown dots around latter lines, and light brown posteroventral and posterior margins of hind pronotal lobe; legs with light brown area on dorsal part of fore tibia as well as distal parts of spines and spurs on fore and middle tibiae, brown distal (apical) portion of hind femur and small spots on hind tibia as well as spines and spurs of this tibia, and brown to light brown marks on all tarsi; most part of each tegmen semitransparent to transparent; abdomen with light brown transverse stripe (band) on each tergite, but last tergite with such band darker

(almost brown); cercus with light greyish brown distal portion, proximedial hook and tubercle near it; genital plate with light grey styles ( Figs 36, 37 ). Scape almost

1.5 times as wide as distance between antennal cavities; posterior edge of pronotum reaching almost apical areas of tegmina; left tegmen with mirror relatively longer than in L. (L.) alienus and L. (L.) kabili as well as with stridulatory vein intermediate between these species in length ( Fig. 80 ); last tergite with moderately wide and deep posteromedian notch; epiproct normally developed, triangularly rounded;

paraprocts with finger-like but short and almost conical apical projections; cercus short, with almost straight proximedial hook, and with tubercle near it rather large and semilamellar but having curved distal part (medial surface of this tubercle distinctly concave) and connected with low medial keel on proximal cercal part as well as completely separated from proximedial hook ( Figs 11, 12 ); genital plate with very deep posteromedian notch and rather long styles ( Fig. 11 ); genitalia completely membranous.

Variations. Second male with eyes having numerous greyish brown spots, genae under eyes having rose tinge, all marks on anterior half of pronotal disc brown to dark brown, and genital plate with barely wider and more rounded posteromedian notch.

Female. Body coloration distinguished from that of males by following pecu-

liarities: presence of rose tinge on epicranium under rostrum, on fore and middle femora, and on hind tibia; intensely rose rostrum and two pairs of longitudinal stripes on head (medial stripes running from rostrum to posterior epicranial edge,

lateral ones located along dorsomedial edges of eyes) as well as anterior two thirds of pronotum (lower parts of this area lighter); almost reddish rose dorsal and outer longitudinal stripes on hind femur as well as median (longitudinal) band on abdomen; reddish brown subdistal part of hind femur; more distinct dark marks on pronotum; almost blackish both a pair of areas on central part of metanotum and a pair of lateral bands running along previous (dorsal) band and interrupted distally

( Figs 38, 39 ). Body structure similar to that of L. (L.) alienus but with some characteristic features: tegmina very strongly reduced, in shape of tiny lobules completely hidden under posterior part of pronotum; genital plate with slightly more elongated and narrowed distal part having a pair of small or very small apical lobules and often median lobule between them (latter lobule not projecting behind previous lobules or slightly projecting behind them; Figs 13–15 ); ovipositor somewhat shorter (hind femur approximately 2 times as long as ovipositor).

MEASUREMENTS. Length (in mm). Body: ♂ 11–12, ♀ 11.5–12.5; pronotum:

♂ 5.4–5.8, ♀ 3.2–3.4; tegminal parts visible behind pronotum, ♂ 0.5–0.6; hind femora: ♂ 11.9–12.6, ♀ 12.7–13; ovipositor 6.2–6.5.

COMPARISON. The new species is distinguished from all the previous species of this subgenus by the tegminal mirror of the left tegmen more longitudinal, and/or by some characteristic features of the male cerci (the proximedian hook straight; the tubercle near it semilamellar, curved, clearly separated from this hook, having concave medial surface, and connected with the low proximedial keel on the cercus)

and of the genital plate in the both sexes (this plate with the posteromedian notch deeper in male, and with the distal part elongately narrowed in female). From L.

(L.) macrognathus , L. (L.) digitatus , L. (L.) concolor , L. (L.) ovatus and L. (L.)

parvus , the new species differs also in the less uniformly light coloration; and from

L. azuriventer , L. vittifemur and L. longicauda (described from more southern territories of Sumatra but after a male nymph or females), in less spotted (less striped) anterior epicranial surface and/or legs, or in the ovipositor shorter than that of the latter species (the hind femur is approximately 1.5 times as long as ovipositor in

L. longicauda and almost 2 times, in the new species).

ETYMOLOGY. This species name is originated from Sumatra I. where its type locality is situated .

Figures

Figs 1–25. Lipotactes spp., schematically: 1–3 – L. (Lipotactes) alienus lambir subsp. n.;

Figs 26–40. Lipotactes spp.: 26–29 – L. (Lipotactes) alienus lambir subsp. n.; 30–33 – L. (L.)

Figs 77–87. Lipotactes spp.: 77 – L. (Lipotactes) alienus lambir subsp. n.; 78 – L. (L.) a.