Haplosialodes liui Huang et al.

Liu, Xingyue, Lu, Xiumei, Xia, Fangyuan & Wang, Bo, 2017, First description of female of Haplosialodes liui Huang et al., 2016 (Megaloptera: Sialidae) from Cretaceous Burmese amber, Zootaxa 4258 (2), pp. 172-178 : 173

Haplosialodes liui Huang et al.

( Figs. 1–3 )

Haplosialodes liui Huang et al., 2016: 8 .

Description of female. Body length 6.4 mm; forewing 7.5 mm long and 2.9 mm wide, hind wing 6.2 mm long and 2.4 mm wide.

Head blackish brown. Compound eyes strongly produced. Antennae with ca. 22 segments; flagellum distinctly attenuated, densely pilose. Mouthparts with labrum about 4.0 times as wide as long and not concaved medially; mandibles distally acutely pointed.

Thorax blackish brown; pronotum with convex anterior margin and much paler on median portion. Legs blackish brown; tarsomere 4 distinctly flattened and bilobed. Wings pale brown, with dense minute setae on wing surface and veins. Forewing nearly 3.0 times as long as wide; 6–7 distinct costal crossveins present; one scp-ra present at proximal 1/3 of subcostal space; ScP and RA distally fused; RP 2-branched; MA 2-branched; length of MA fork about half of RP fork; three crossveins present in RA space; MP having two main branches, both branches bifurcated into equal-sized forks; CuA 2-branched. Hind wing poorly preserved; RP, MA, and anterior branch of MP bifurcated.

Abdomen brown, but integument of abdominal segment 9 yellow. Sternum 7 broad, about 2.5 times as wide as long; posterior margin nearly truncate, posterolateral corners rounded. Gonocoxite 8 rather short, ~1/4× length of sternum 7, but transversely wide and slightly arched; putative gonapophyses 8 paired and sclerotized; a feebly sclerotized subtriangular lobe present posteriad gonapophyses 8.

Material examined. BA17001 (LPAM), amber piece preserving an almost complete adult female of H. liui (ventral parts obscure); it is polished in the form of a subquadrate cabochon, transparent, with length×width about 14.5×10.0 mm, height about 3.8 mm.

Figures

FIGURE 1. Haplosialodes liui Huang et al., female. A. Habitus photograph, dorsal view; B. Habitus photograph, ventral view; C. Photograph of head, ventral view; D. Photograph of antennal apex; E. Photographa of fore tarsus. Scale bars: 1.0 mm (A-B); 0.5 mm (C – D); 0.25 mm (E).

FIGURE 2. Wing venation of Haplosialodes liui Huang et al., female. A. Right forewing; B. Left forewing; C. Left hind wing; D. Right hind wing. Scale bar: 1.0 mm.

FIGURE 3. Haplosialodes liui Huang et al., female. A. Photograph of genitalia, ventral view; B. Drawing of genitalia, ventral view. S 7: sternum 7; T 9: tergum 9; gx 8: fused gonocoxites 8; gp 8: gonapophysis 8. Scale bar: 1.0 mm.