Eoeurysa sagittaria, Bartlett & Meshram, 2020

N., Ramya, Bartlett, Charles & Meshram, Naresh M., 2020, Two new species of planthoppers from India (Hemiptera: Auchenorrhyncha: Delphacidae) in the genera Parasogata and Eoeurysa, European Journal of Taxonomy 724, pp. 93-108 : 100-103

Eoeurysa sagittaria sp. nov.

urn:lsid:zoobank.org:act:EA1BE8CB-8138-4643-A8B9-DE75946E422D

Figs 3–5

Diagnosis

Body dorsoventrally flattened, colouration creamy white to pale yellow, without dark markings ( Fig. 3A ). Vertex longer than broad ( Fig. 3D ). Male with parameres simple, sinuate, weakly expanded medially ( Fig. 4E ), in lateral view with mediolateral process ( Fig. 4F ). Aedeagus tubular, approximately straight, with strong, elongate, dorso-basal process, apex sagittate ( Fig. 4C ). Segment 10 with single caudal process ( Fig. 4D ).

Etymology

The species name comes from the Latin word ‘ sagittaria ’, meaning ‘arrow’, in reference to the arrowhead shape of the apex of the aedeagus. The specific epithet is feminine in gender to match the apparent gender of the genus.

Type material

Holotype

INDIA • ♂; Himachal Pradesh, Rampur Una ; 31°44′92″ N, 77°62′92″ E; 22 Sep. 2018; Sunil and G.N. Niranjan leg; light trap; NPC HEMT9 .

Paratypes

INDIA • 4 ♂; same collection data as for holotype; NPC HEMT10 to HEMT13 • 7 ♀; same collection data as for holotype; NPC HEMT14 to HEMT20 .

Description

MEASUREMENTS (mm). Male (holotype, NPC HEMT9) 3.7 long, 0.6 wide across eyes, 0.5 wide across hind margin of pronotum. Female (paratype, NPC HEMT14) 3.9 long, 0.6 wide across eyes, 0.5 wide across hind margin of pronotum.

COLOURATION. Creamy white to pale yellow. Head concolorous with thorax; thorax creamy white with light yellow carina; tegulae concolorous with thoracic notum. Forewings hyaline, veins pale, apical margin bordered with black. Abdomen creamy white near base, near black distally ( Fig. 3 A–E).

MORPHOLOGY. Body dorsoventrally depressed. Head including eyes 0.9× as wide as pronotum. Vertex broad, widest at base, tapering distally to broad apex; length 0.4× width across eyes, Y-shaped carina distinct, forked near distal margin of eyes ( Fig. 3A, D ). Anterior margin of head weakly convex (from dorsal or ventral view), fastigium sharply angled (from lateral view) ( Fig. 3C ). Frons moderately broad, longer than wide, lateral margins weakly arced, widest subapically; median carina forked near fastigium. Carina of frons and clypeus prominent. Clypeus base as wide as apex of frons, rostrum reaching mesocoxae ( Fig. 3E ). Antennae terete, scape about as wide as long; pedicel approximately 3 × as long as scape. Pronotum broad, 3.1× as wide as long; carinae distinct, lateral carinae reaching posterior margin. Mesonotum 1.1 × as wide as long ( Fig. 3D ), with carinae not reaching posterior margin, lateral carinae weakly diverging posteriorly.

MALE GENITALIA ( Fig. 4 ). Pygofer in lateral view roughly triangular (much wider ventrally than dorsally, dorsocaudal margins not expanded); in caudal view 1.2 × as long as wide, medioventral processes of opening absent, diaphragm weakly sclerotized, moderately wide, dorsal margin convexly produced ( Fig. 4D, G ). Parameres simple (in caudal view), 8× as long as wide; sinuate with sharp, dorsolaterally directed apices ( Fig. 4E ); in lateral view with mediolateral process ( Fig. 4F ). Aedeagus tubular, straight, mostly of uniform width; 7.2 × as long as wide; base with elongate caudally curved spine; apex abruptly broadened and decurved round sagittate apex, basally ornamented with long curved spinose process. Suspensorium elongate, ventral two-thirds ring-like ( Fig. 4A, C ). Segment 10 quadrangular, 1× as long as wide, ring-like, bearing short, curved processes on dorsocaudal surface; segment 11 moderately long ( Fig. 4A, D ).

FEMALE GENITALIA ( Fig. 5 ). Valvulae I in lateral view ( Fig. 5A ), dorsally concave, dorsal and ventral margin with smoothly sculptured area extending from base to apex. Valvulae II ( Fig. 5B ), in lateral view, distal half of dorsal margin with 17–18 large, quadrangular, distantly placed serrations decreasing in size gradually towards the apex; apex acute with small serrations; ventral margin translucent, tip with few serrations.

Molecular data

The DNA barcode fragment (mtCOI ~ 650bp) sequence was submitted to NCBI GenBank with accession numbers MN787520 and MN787521 .

Remarks

Eoeurysa sagittaria sp. nov. is closely related to E. arundina , especially based on the basal process of aedeagus ( Fig. 4C ). This species can easily be identified by the flattened body ( Fig. 3A ), the progressively broadening frons ( Fig. 3D ) and the structure of the male genitalia ( Fig. 4 ) (aedeagus apically sagittate, lacking the dorsal teeth of E. arundina ).

Figures

Fig. 3. Eoeurysa sagittaria sp. nov., habitus. A, C–D. Holotype ♂ (NPC HEMT9). B. Paratye ♀ (NPC HEMT14). A. Male habitus, dorsal view. B. Female habitus, dorsal view. C. Habitus, lateral view. D. Head, pro- and mesonotum, dorsal view. E. Head, ventral view.

Fig. 4. Eoeurysa sagittaria sp. nov., male genitalia, holotype (NPC HEMT9). A. Aedeagal complex. B. Male genitalia, caudal view. C. Aedeagus.D. Male genitalia, lateral view. E. Parameres, caudal view. F. Paramere, lateral view. G. Pygofer, caudal view.

Fig. 5. Eoeurysa sagittaria sp. nov., female genitalia, paratype (NPC HEMT14). A. Valvulae I. B. Valvulae II.