Macrocosmetura truncata, Chang & Wang & Shi, 2021

Chang, Yan-Lin, Wang, Tao & Shi, Fu-Ming, 2021, Three new genera and five new species of the tribe Meconematini (Orthoptera: Tettigoniidae: Meconematinae) from Southwestern China, European Journal of Taxonomy 751 (1), pp. 140-158 : 152-154

Macrocosmetura truncata gen. et sp. nov.

urn:lsid:zoobank.org:act:8752299A-3372-4DF9-AB26-D7341AF183E2

Fig. 5

Diagnosis

Male tenth abdominal tergite observably extended backwards and genitalia sclerotized, posterior area broad, apex truncate.

Etymology

The name of the new species refers to the morphology of the male genitalia, the word ʻ truncata ʼ from the English ʻtruncateʼ. The Chinese name of the species is Ř形kffl尾ễ (Jie Xing Da Shi Wei Zhong).

Material examined

Holotype CHINA • ♂; Guizhou, Suiyang, Chachang ; 15 Aug. 2010; Le-Hong Zhao leg.; HBU.

Paratypes CHINA • 1 ♀; same collection data as for holotype; HBU • 1 ♀; Guizhou, Suiyang, Rangshui ; 13 Aug. 2010; Le-Hong Zhao leg.; HBU .

Description

MEASUREMENTS (mm). Body: ♂ 10.3, ♀ 10.0 – 10.5; pronotum: ♂ 4.5, ♀ 4.1 – 4.4; hind femora: ♂ 8.7, ♀ 9.8 – 10.5; ovipositor: 6.2 – 6.3.

BODY. Small and stout.

HEAD. Fastigium verticis conical, apex rounded, with median sulcus on dorsum. Eyes oval, protruded forwards.Apical segment of maxillary palpus longer than subapical one, apical area inflated, apex truncate.

THORAX. Pronotum longer, posterior margin reaching anterior margin of third abdominal tergite; lateral lobe longer than deep, with posterior margin tapering. Thoracic auditory spiracle exposed, small, oval.

TEGMEN. Tegmina short, reaching posterior margin of pronotum, apices widely rounded. Hind wings absent.

LEGS. All femora unarmed on ventral surfaces. Fore coxa with spine; fore tibia with 5 spines on inner margin and 5 spines on outer margin of ventral surface, tibial tympana open and oval on both sides. Middle tibia with 4 – 5 spines on each side of ventral surface. Hind tibia with 20 – 23 spines on each side of dorsal margin, 2 pairs of ventral apical spurs and 1 pair of dorsal apical spurs. Thoracic auditory spiracle exposed, small, elliptic.

MALE ABDOMEN. Ninth abdominal tergite expanded backwards, postero-lateral corner elongated, fingershaped, incurved, apical area curved backwards and outwards, apex rounded. Tenth abdominal tergite extended backwards, basal half broad, apical half narrow, with a median split, divided into 2 square lateral lobes. Cercus short, apical half downcurved, covered by tenth abdominal tergite, not visible in dorsal view. Genitalia sclerotized, posterior area broad, truncate ( Fig. 5I ). Subgenital plate with basal half broad, apical half with long middle lobe and 1 pair of short lateral lobes. Styli long inserted on inner margins of subapical areas of the lateral lobes.

FEMALE. Pronotum shorter than male; tegmina exposed narrow edge. Ninth abdominal tergite expanded backwards and ventrad, latero-anterior corner elongated, finger-shaped, overlapped, apices rounded. Tenth abdominal tergite with posterior tapering, middle with a small notch. Cerci long conical, apices subacute. Ovipositor moderately curved upwards, base stout, terminal acute, dorsal margin denticulate, ventral margin smooth.

COLORATION. Body light yellowish brown. Dorsum of head with 3 longitudinal brown stripes. Pronotum with disc light, and 1 pair of brown spots; lateral lobe with ventral edge brown. Outer surface of hind femur with some light brown spots, knee area brown, spines on all tibiae brown. Ninth to tenth abdominal tergites brown.

Distribution

China (Guizhou).

Figures

Fig. 5. Macrocosmetura truncata gen. et sp. nov. A–C, G–I, L. Holotype, ♂ (HBU). D–F, J–K. Paratype, ♀ (HBU). – A–B, D–E. Pronotum. A, D. Dorsal view. B, E. Lateral view. – C, F–L. Apex of abdomen. C, F. Lateral view. G, J. Dorsal view. H, K. Ventral view. I. Dorso-lateral view. L. Ventro-apical view.