Trigonoschema Crispolon & Soulier-Perkins gen. nov.

urn:lsid:zoobank.org:act: C8299091-60D3-49B4-852F-2145956D7FE9

Figs 12–16

Type species

Trigonoschema manoborum sp. nov. here designated.

Diagnosis

In dorsal view, teardrop shaped and apex of tegmen not visible due to folding. In lateral view, very steeply declivous pronotum and crown of the head, nearly form a right angle with the rest of the dorsum in profile.

Etymology

When observed in dorsal view, the general shape of the habitus fits in a triangle even if a closer observation would lead to describe it as teardrop shaped. The name is built using two greek words “trigonos” for triangular and “schema” for shape. It is neutral.

Description

BODY. Length 9.5–12.5 mm (tegmen included), width 4–5 mm.

GENERAL SHAPE. Not dorso-ventrally flattened, in lateral view total length around 3 times height (Figs 2B, 12–16A). Ocelli small, distance between eyes 9–10.5 times ocellus diameter (Figs 1, 12–16B). Distance between ocellus and compound eye less than 4 times ocellus diameter ((Figs 1, 12–16B). Distance between ocelli 1.5 ocellus diameter (Figs 1, 12–16B). Postclypeus with longitudinal furrow, swollen laterally and slightly ovoid shape in frontal view, widest part close to frons, not receding and prior to anteclypeus where it bends rounded in lateral view, with wide longitudinal furrow (Figs 1, 12–16B). Pronotum curving around 45º angle (Figs 2B, 12–16A). Tegmen translucid without concave apical cells. Apical curve of tegmen rarely visible in dorsal view, tegmen folded in such a way that widest part of habitus is before midlength of tegmen (Figs 12–16C).

MALE TERMINALIA. Subgenital plates without fine appendage (Fig. 12F), if present shorter than main plate, not forming an acute angle shape with the main plate (Figs 14, 16F). Paramere globose, lateral margin of paramere with protrusion, on the ventral margin on the sub apex with angular protrusion ornamented with set of setae (Figs 12, 14, 16G). Pp of aedeagus thick and beak-like shape (Figs 12, 14, 16H).

Distribution

Philippines.

Key to the species of Philippine Trigonoschema gen. nov.

1. Most of vertex and frons bright yellow and postclypeus orange (Figs 12–13) ................................... ......................................................................... T. manoborum Crispolon & Soulier-Perkins sp. nov.

– Vertex, frons and postclypeus of the same color that can be brown, orange or red (Figs 14–16)..... 2

2. Red band running across base of tegmen and scutellum (Fig. 16) ...................................................... ........................................................................................ T. rubercella Crispolon & Guilbert sp. nov.

– No red band visible in dorsal view (Figs 12–13)............................................................................... 3

3. Scutellum yellow (Fig. 14) .................................................. T. negrosensis Crispolon & Yap sp. nov.

– Scutellum brown (Fig. 15)................................................... T. pallida (Lallemand, 1927) comb. nov.