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

Qin, Dao-Zheng & Zhang, Ya-Lin, 2010, A key to the genera of Tropidocephalini (Hemiptera: Fulgoromorpha: Delphacidae) of China with description of Mucillnata rava, new genus and species, Zootaxa 2448, pp. 61-68 : 62-65

Mucillnata gen. n.

Type species. Mucillnata rava sp. nov., here designated.

Description. Small, yellowish delphacids. Head including eyes narrower and shorter than pronotum ( Figs. 34 , 37 ). Vertex short, submedian carinae absent, Y-shaped carina distinct ( Figs. 34 , 37 ). Frons with median carina simple ( Figs. 36 , 38 ). Antennal segments cylindrical, short ( Figs. 36 , 38 ). Post-tibial spur thick, with an apical tooth, without teeth on lateral margin. Male pygofer with medioventral process present ( Figs. 41, 43 ). Parameres moderate, convergent apically ( Figs. 41, 48 ). Diaphragm of pygofer open medially ( Fig. 43 ). Aedeagus tubular, broad, basal process arising basally ( Figs. 45, 46, 47 ). Male anal segment ring-like, caudoventral margin produced, with single process on right side ( Figs. 41, 49 ).

Etymology. The generic name is an arbitrary combination of letters, and is regarded as feminine.

Remarks. The new genus is similar to Arcofaciella Fennah and Arcifrons Ding in having the vertex short and about three times as broad as median length, submedian carinae absent, transition from vertex to frons with distinct transverse carina. However, Mucillnata differs from both the genera in having the frons not distinctly inclined anteriorly in lateral view; the lateral carinae of the pronotum diverging and not attaining the hind margin; the male pygofer with a medioventral process; the male anal segment with single process on the caudoventral margin on right side. From Arcofaciella the new genus differs in having the postclypeus nearly in the same plane as the frons at base rather than at right angle to the frons; in the spinal formula of hind leg 5- 6-4; and in the presence of median carina on the clypeus.

The new genus is also similar to the genus Epeurysa Matsumura in the external appearance and in the configuration of the male genitalia. However, it differs from Epeurysa by: the lateral carinae of the vertex strongly converging towards apex, distinctly narrower at apex than at base (in Epeurysa lateral carinae of the vertex slightly concave medially, apically nearly as wide as basally); the male pygofer with single median process on the ventrocaudal margin (in Epeurysa with 3 medioventral processes); the parameres with the basal angles not produced (in Epeurysa the basal angles distinctly produced); the male anal segment with caudoventral margin produced in to a single process on right side (in Epeurysa the laterodistal angles produced in two separated processes).

Figures

FIGURES 34 – 36. Mucillnata rava sp. nov., 34, male adult, dorsal view; 35, same, left lateral view; 36, head, ventral view.

FIGURES 37 – 49. Mucillnata rava sp. nov., 37, head and thorax, dorsal view; 38, head, ventral view; 39, head and thorax, left lateral view; 40, right forewing, macropterous male; 41, male genitalia, caudal view; 42, same, left lateral view; 43, pygofer, caudal view, anal segment, aedeagus and parameres removed; 44, same, ventral view; 45, anal segment, aedeagal complex and parameres, left lateral view; 46, aedeagus, left lateral view; 47, same, caudoventral view; 48, parameres, caudal view; 49, male anal segment, caudal view.