Apochrysogramma rotundum, Yang, Qiang, Makarkin, Vladimir N. & Ren, Dong, 2011

Yang, Qiang, Makarkin, Vladimir N. & Ren, Dong, 2011, Two interesting new genera of Kalligrammatidae (Neuroptera) from the Middle Jurassic of Daohugou, China, Zootaxa 2873, pp. 60-68 : 65-66

Apochrysogramma rotundum sp. nov.

Figs. 4–6

Etymology. The specific name is derived from the Latin rotundus, round, in reference to the rounded shape of the forewing of the holotype.

Holotype. Specimen No. CNU-NEU-NN2009033, deposited in CNUB. An incomplete well-preserved forewing, broken into two parts (proximal and distal) and preserved on different layers.

Type locality and horizon. Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China; Middle Jurassic (Bathonian, Jiulongshan Formation).

Description. Forewing rounded, with costal margin slightly convex, about 45 mm long as originally preserved (39 mm when restored; estimated complete length> 55 mm), 36 mm wide. Costal space very broad, not narrowed towards wing apex. Subcostal veinlets very closely spaced, few-branched, parallel to each other, connected by irregularly spaced crossveins between their basal portions; very shallowly forked near costal margin (alternatively, the fusion of trichosors and curved veinlet terminations could form these shallow forks; Fig. 6 B). Trichosors not detected. Sc concave, distally not fused with R1. R convex, parallel to Sc for long distance. Subcostal space narrow. Rs almost completely incorporated into R, with at most 26 ORBs. ORB1 (=Rs1) forked four times in middle part of wing; other ORBs sometimes forked once or twice before marginal twigging. MA strongly concave, straight for most of length, few branched distally. Stem of MP concave, curved smoothly posteriorly with numerous (approximately 25) pectinate, anteriorly directed branches. CuA strongly convex, running parallel to MP; with approximately 12 pectinate branches. CuP slightly concave, pectinate. Anal region not preserved. Crossveins numerous, dense over most of wing (subcostal to intracubital spaces), sparse between branches of CuA, CuP basally; entirely absent for long distances between closely spaced terminal veinlets of ORBs, branches of MP, CuA, CuP (‘marginal twigging’). Eye-spot well developed, faintly visible, consisting of rounded central convex structure (i.e. embossed) (approximately 3 mm diameter) with concave margin, and many (approximately 35 in number) smaller pale spots differing in size (0.2 mm to 1.5 mm diameter), forming ring around central spot ( Fig. 6 A); each pale spot located in one cell, whereas central spot occupying many cells. Rest of wing color pattern consists of several fuscous stripes in MP space, dark transverse band in radial space distal of eye-spot, and a dozen dark spots along outer margin.

Figures

FIGURES 4. Apochrysogramma rotundum gen. et sp. nov. Holotype CNU-NEU- NN 2009033, general view of the specimen. Scale bar = 10 mm.

FIGURE 5. Apochrysogramma rotundum gen. et sp. nov. Holotype CNU-NEU- NN 2009033. Drawing of the forewing (restored). Scale bar = 10 mm.

FIGURES 6. Apochrysogramma rotundum gen. et sp. nov. Holotype CNU-NEU- NN 2009033, forewing details. A, eye-spot. B, costal margin showing branching of the subcostal veinlets. Scale bars = 3 mm (A), 1 mm (B).