Jurakempynus bellatulus, Wang & Liu & Ren & Shih, 2011

Wang, Yongjie, Liu, Zhiqi, Ren, Dong & Shih, Chungkun, 2011, New Middle Jurassic Kempynin Osmylid Lacewings from China, Acta Palaeontologica Polonica 56 (4), pp. 865-869 : 867-868

Jurakempynus bellatulus sp. nov.

Fig. 3 .

Etymology: The specific name bellatulus refers to the delicate hindwing of new species.

Holotype: CNU−NEU−NN2010207 ( Fig.3A ). A hindwing with the apex lost.

Type locality: Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China.

Type horizon: Jiulongshan Formation, Aalenian–Bajocian boundary, Middle Jurassic.

Diagnosis.—Hindwing with large brown spots; the cells of MP region arranged regularly; CuP with 7–8 pectinate branches.

Description.—Only hindwing preserved, about 28.7 mm long, 11.2 mm wide ( Fig. 3A ). Membrane hyaline, with fuscous markings on the margin, forming triangular hyaline region on posterior margin; trichosors present on posterior margin and part of anterior margin, two nygmata distinct; costal region relatively narrow, cross−veins simple; Sc and R1 fused distally, cross−vein sc−r1 undetected; cross−veins r1−rs numerous; Rs

http://dx.doi.org/10.4202/app.2010.0050

with 23 branches, distal branches distinctly sinuous; cross−veins in radial area numerous, arranged irregularly; MA originating from the base of Rs−stem as most osmylids, base connected with a sinuous vein ( Tjeder 1957); MP forks close to wing base, with a thin additional vein before the fork which is detected in extant Kempynus ( Kimmins 1940) ; MP region dilated, forming two rows of cells; MP 1 simple, MP 2 bifurcated distally; Cu forked at base; CuA long, with pectinate branches from middle to terminal end; CuP short, bifurcated in middle, the longer branches forming pectinate branches, ending close to the middle of CuA; A1 short, with 3 branches; A2 with two branches; A3 single branch ( Fig. 3B ).

Remarks.— Jurakempynus bellatulus sp. nov. is separated from Jurakempyuns sinensis sp. nov. based on the following characters: spots of J. bellatulus sp. nov. present on whole apex in hindwing, while spots in J. sinensis sp. nov. only restricted to the margin; MP 2 with many distal dichotomic branches in J. bellatulus sp. nov., while MP 2 of J. sinensis sp. nov. forming many pectinate branches; CuP with 7 pectinate branches in J. bellatulus sp. nov., while CuP in J. sinensis sp. nov. has 4–5 pectinate branches.

Figures

Fig. 3. Kempynin osmylid lacewing Jurakempynus bellatulus sp. nov. A. Photo of CNU−NEU−NN2010207. B. Line drawing of CNU−NEU− NN2010207.