Hexacentrus tiddae Ghosh, Jaiswara, Monaal & Rajaraman 2023, sp. nov.
Creators: name: Ghosh, Aarini
name: Jaiswara, Ranjana
name: Sabharwal, Shagun
name: Dasoju, Vivek
name: Bhattacharjee, Anubhab
name: Rajaraman, Bittu Kaveri
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tettigoniidae
Hexacentrus
Hexacentrus tiddae

description: Hexacentrus tiddae Ghosh, Jaiswara, Monaal & Rajaraman sp. nov.
Type Material. Holotype, ♂, INDIA: Haryana, Sonipat, Rai, Aswarpur, ~ 315 m a.s.l., 10.VII.2022, 28° 56′48.78″N; 77° 6′5.19″ E, AG_SO2_M1(ZSI). Paratype —1 ♂, the same information as holotype, VII-2022 ex-AG_SO2_M2, without left forewing (BNHS).
Type locality. Ashoka University, Aswarpur, Sonipat, Haryana, India.
Distribution. The species is so far only known from its type locality.
Etymology. ‘tiddae’ in Hindi and Haryanvi refers to Orthoptera —it is used for locusts and crickets.
Diagnosis and Description. The species is similar to H. ashoka, H. bifurcata & H. japonicus but differs by the following characters. Body medium size and slender (Fig. 11A–B). Head. Face longer than wide. Antennae without any short dark rings. Fastigium verticis laterally much more compressed, apically tapering and triangular in dorsal view pointing appearance apically. Scapus cylindrical with slight bulge at apex in dorsal view, scapus almost 3 times as wide as fastigium (Fig. 11C & 11F).
Pronotum. Pronotum longer than wide, flat with a slightly upward curved near end, longer than broad and extended posteriorly. Anterior and posterior margins slightly concave; an hourglass-like band covers the whole pronotum (Fig. 11C–D).
Legs. FI dorsally unarmed and ventrally armed with 18–30 spines on inner and outer margins, 1 apical spine on lateral margin; TI inner tympanum slightly longer than outer tympanum; TI dorsally unarmed and ventrally armed with 6 subapical spurs on each side, both inner and outer margin without spines; FII dorsally unarmed and ventrally armed with 18–22 spines on inner and outer margins, 2 apical spines on the lateral margin; TII dorsally unarmed and ventrally armed with 6 subapical spurs on each side, both inner and outer margin without spines; FIII dorsally unarmed and ventrally armed with 39–52 spines both or inner and outer margin; TIII dorsally armed with 34–36 spines on both inner and outer margins and ventrally armed with 11–14 subapical spurs on both inner and outer margins, one subapical spur in center.
Male. Wings. Hindwings almost as long as tegmina, hidden under tegmen; tegmen is long surpassing hind tibiae. Male tegmen are long, broad in middle, and nearly triangular at end. M straight, thick distally, CuP bent distally, space between CuP and CuA shorter than between M and CuA, 1 st anal vein bearing stridulatory file straight, bent in middle, ventral side with 20–23 teeth (Fig.14C, 12).
Male Genitalia. Supra-anal plate triangular with a dorsal groove. Little broadened short apex slightly pointed. Cerci cylindrical at base; broad with a tubercle on internal side, then abruptly narrowed to small digitiform apical appendages with strongly incurved apex (Fig.11E). Sub-genital plate elongates with a median longitudinal furrow, lateral ridges well developed, apical margin with prominent ‘V’-shaped bifurcation (Fig.11G). Styli slightly thicker at base than at tip, both are diverging from each other, and have the apex is rounded and inward curved (Fig. 11G–H).
Acoustic measurements. Hexacentrus tiddae produces a regular amplitude modulated pattern of continuous syllables, alternating between longer, higher amplitude syllables and faster, low amplitude syllables. All syllables have the same broadband spectral structure. The peak frequency is 9.4 ± 3.6 kHz (Fig. 13D–E) and the bandwidth is 40 ± 3.2 kHz (Fig. 13D–E). The low amplitude syllables last for 0.9 ± 0.4 ms, with a total syllable period of 1.61 ± 0.6 ms (Fig. 13B–13C), and SRR of 715 ± 156 (n=3 animals, 10 syllables of each kind per animal). The high amplitude syllables occur regularly, separated by an average interval of 846.25 ± 46 ms. The high amplitude syllable duration is 2.33 ± 0.7 ms with a syllable period of 1.71 ± 0.4 ms and SRR of 463 ± 120.2 (Fig. 13C) (n=3 animals, 10 syllables per animal). The juxtaposition of the high amplitude buzzing bursts and the low amplitude background trill sounds almost like two simultaneous callers.
description: Published as part of Ghosh, Aarini, Jaiswara, Ranjana, Sabharwal, Shagun, Dasoju, Vivek, Bhattacharjee, Anubhab & Rajaraman, Bittu Kaveri, 2023, Description of three new species of predatory Genus Hexacentrus (Orthoptera Tettigoniidae) from India, with bioacoustic and morphological characterizations, pp. 335-356 in Zootaxa 5249 (3) on pages 350-355, DOI: 10.11646/zootaxa.5249.3.2, http://zenodo.org/record/7690993