Ommatocyba Yan, Yang & Webb, 2025

Genus Ommatocyba Yan, Yang & Webb , gen. nov., new placement

Figs 1 View Figure 1 , 2 View Figure 2

Type species.

Mohunia biguttata Wang & Li, 2003 .

Description.

Body relatively robust, lightly colored with distinct markings. Head compressed, narrow in lateral view, crown produced medially, distinctly shorter than interocular width and slightly narrower than pronotum (Fig. 1 A, B View Figure 1 ). Face slightly inflated, frontoclypeus and anteclypeus in male very broad with lorum and gena very narrow (Fig. 1 C, D View Figure 1 ). Third apical cell of forewing petiolate basally (Fig. 2 B View Figure 2 ). Hind wing veins RP and MA separate throughout length, connected by cross vein distally; submarginal vein not exceeding CuA vein (Fig. 2 C View Figure 2 ).

Male pygofer triangular-shaped in lateral view; dorsal bridge short; lobe with appendages on caudal part, the more dorsal appendage with setae; several microsetae along lower margin of lobe (Figs 1 H View Figure 1 , 2 A View Figure 2 ). Anal tube with ventral appendage subbasally on each side (Figs 1 I View Figure 1 , 2 A View Figure 2 ). Subgenital plate with caudal 2 / 5 narrowed abruptly to inner margin; with uniseriate row of macrosetae on broader basal part followed by a few spine-like setae; inner margin distally with short fine setae (Figs 1 J View Figure 1 , 2 E View Figure 2 ). Style with outer basal arm short, distal part beyond basal arms long and robust basally, distal third strongly curved laterally and tapered to foot-like apex with subapical serrated lobe on inner margin (Figs 1 K View Figure 1 , 2 D View Figure 2 ). Connective lamellate, central rib weak (Figs 1 K View Figure 1 , 2 D View Figure 2 ). Aedeagus with shaft elongate, tapered to apex and weakly curved dorsally in lateral view, with pair of subapical processes on ventral surface, gonopore apical on ventral surface, basal apodeme moderately well developed, compressed antero-posteriorly (Figs 1 K View Figure 1 , 2 F, G View Figure 2 ).

Diagnosis.

The new genus resembles Bolanusoides Distant in its compressed head (Fig. 1 F, G View Figure 1 ) and petiolate third (outer) apical forewing cell (Fig. 2 B View Figure 2 ) but can be distinguished from the latter by the following features: hind wing with RP and MA separate throughout length and connected by cross vein (Fig. 2 C View Figure 2 ) rather than fused distally in Bolanusoides ; postclypeus and anteclypeus distinctly dilated in male (Fig. 1 C View Figure 1 ); unique shape of the subgenital plate (Figs 1 J View Figure 1 , 2 E View Figure 2 ); style foot-like apically rather than tapered to apex in Bolanusoides , with subapical lobe on inner margin, and without fine setae rather than many fine setae on outer margin at midlength in Bolanusoides (compare Fig. 2 D, H View Figure 2 ); the subapical and medial regions of the aedeagal shaft are parallel-sided rather than inflated in Bolanusoides .

Remarks.

Based on its flattened appearance, Ommatocyba biguttata (the type species of Ommatocyba ) was originally placed in the genus Mohunia Distant ( Deltocephalinae : Mukariini ). However, based on the location of ocelli, forewing and hindwing venation, apically acute hind tarsomere I (Fig. 1 E View Figure 1 ), and male genitalia, Chen et al. (2007) transferred it to Typhlocybinae (unplaced to genus). More evidence of this subfamily placement is provided here by the shape of the style, while its petiolate 3 rd apical cell of the forewing and hind wing lacking a submarginal vein places the genus in the tribe Typhlocybini . Within this tribe, it is further placed in the Eupteryx genus complex based on the hind wing with three cross veins. It forms a new genus based on its flattened head, sexually dimorphic face and unique shape of the subgenital plate (see also Diagnosis).

With the addition of Ommatocyba , the tribe Typhlocybini comprises 31 genera from China. A key to these genera is in preparation by the first author, the only previous key being in Zhang (1990: 144) in Chinese, comprising nine genera.

Etymology.

The generic name is the concatenation of “ ommato ” (from the Greek noun ὄμμα, - ατος = eye) + “cyba” (from the Greek noun κύβη = head, as in Typhlocyba ), indicating the presence of ocelli in this typhlocybine genus.

Distribution.

China ( Guangxi, Hainan, Yunnan).