Paralivatiella, Qin, Dao-Zheng & Zhang, Ya-Lin, 2010

Qin, Dao-Zheng & Zhang, Ya-Lin, 2010, Paralivatiella serrata, a new genus and new species of Eodelphacini from China, with a redescription of Prolivatis Emeljanov (Hemiptera: Fulgoromorpha: Delphacidae), Zootaxa 2517, pp. 15-24 : 17

Paralivatiella gen. nov.

Type species. Paralivatiella serrata n. sp. here designated.

Diagnosis. Small, brown delphacids. Head longer and narrower than pronotum ( Figs 1 , 4 ). Vertex quadrate, slightly broader than long, anterior margin of vertex rounded, projecting in front of eyes ( Figs 1 , 4 ), in profile rounded to frons ( Figs 2 , 5 ), submedian carinae arising near base of lateral carinae, converging and meeting before apex of vertex, forming isosceles triangle at base of vertex ( Figs 1 , 4 ), Y-shaped carina with stem obscure ( Figs 1 , 4 ). Median carina of frons simple ( Fig. 3 ). Lateral carinae of pronotum sinuate, not reaching posterior margin ( Figs 1 , 4 ). Mesonotum with five carinae ( Figs 1 , 4 ). Antennal segments distinctly elongate ( Figs 1–3 ). Forewings with continuous transverse veins and with membrane bent down at rest ( Figs 1, 2 , 6 ), with 12 closed apical cells, Sc+R with one branch before subapical transverse nodal line ( Fig. 6 ). Hind tibiae with 3 lateral teeth, metatarsomere I with five apical teeth, metatarsomere II with row of teeth, marginal teeth longer than other teeth. Post tibial spur spine-like, without teeth on inner margin ( Fig. 16 ), Male pygofer strongly excavated ventrocaudally, with small median process on midventral margin ( Figs 8–10 ). Aedeagus 3- segmented, distal segment arched clockwise ( Fig. 13 ). Parameres simple, convergent apically ( Figs 8, 15 ); anal segment without processes, anterior margin strongly excavated inwardly ( Figs 8, 17 ).

Remarks. Paralivatiella conforms to the tribe Eodelphacini based on the generic characters described by Emeljanov (1995) viz one simple median carina of frons; the distal aedeagal segment arched clockwise (from the base curved to the left when viewed caudally); the presence of row of teeth on the metatarsomere II in which the marginal teeth are considerably longer than all others; the presence of the sinus on the hindwings opposite CuAP; the absence of postnodal transverse veins of the forewings; the presence of a well-defined bend of the membrane when the wings are folded and the intermediate carinae of mesonotum straight.

The new genus differs from Ostama by the mesonotum having 5 longitudinal carinae (3 in Ostama ) and forewing having 12 closed apical cells (15 in Ostama ). It differs from Melanesia and Paranda by the hind tibiae having 3 lateral teeth (2 in Melanesia and Paranda ). From Eodelphax it differs by the antennal segments cylindrical (compressed in Eodelphax ). From Punana and Prolivatis it differs by the Sc+R in forewings having one branch before subapical transverse nodal line (two branches in Punana and Prolivatis ), it also differs from Punana by the antennal segments distinctly elongate (distinctly short in Punana ) and from Prolivatis by the absence of lanceolate lobes at lateroventral margins of the male pygofer (lanceolate lobes present in Prolivatis ). The new genus is closest to the genus Livatiella in body appearance, but differs from the latter by the lateroventral margins of male pygofer being smooth (distinctly produced in Livatiella ), laterodorsal angle angulate (strongly produced in a spinose process or a finger-like lobe in Livatiella ); by the tegmina with Sc+R forked more basad of union of claval veins (about the same level with union of claval veins in Livatiella ).

Distribution. Currently known only from southwest China (Yunnan Province).

Figures

FIGURES 1 – 3. Paralivatiella serrata n. sp., 1, male adult (abdomen removed), dorsal view; 2, same, left lateral view; 3, head, ventral view.

FIGURES 4 – 17. Paralivatiella serrata n. sp., 4, head and thorax, dorsal view; 5, same, left lateral view; 6, right forewing; 7, right hindwing; 8, male genitalia, caudoventral view; 9, same, left lateral view; 10, male pygofer, caudoventral view, anal segment, aedeagus and parameres removed; 11, anal segment, aedeagus complex and parameres, left lateral view; 12. aedeagus, left lateral view; 13, same, caudoventral view; 14, connective; 15, parameres, caudoventral view; 16, distal end of metatibia and metatarsus; 17, anal segment, caudal view.