Archaulacus probus, Li, Longfeng, Shih, Chungkun & Ren, Dong, 2014

Li, Longfeng, Shih, Chungkun & Ren, Dong, 2014, New fossil Praeaulacinae wasps (Insect: Hymenoptera: Evanioidea: Praeaulacidae) from the Middle Jurassic of China, Zootaxa 3814 (3), pp. 432-442 : 433-435

Archaulacus probus sp. nov.

( Fig. 1 )

Etymology. The specific name is from Latin “ probus ” meaning excellent, referring to the well-preservation of this specimen.

Type material. Holotype: female. No. CNU-HYM-NN-2012033. Well preserved with almost complete body, antenna and wings. Color brown, particularly on mesosoma and metasoma.

Occurrence. Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China, Jiulongshan Formation, late Middle Jurassic (Callovian–Bathonian boundary).

Diagnosis. As for genus.

Description. Head medium-sized, transversely broad, nearly 1.6 times as wide as long. Antenna with 20 antennomeres as preserved; scape thin basally, swollen distally, and slightly longer than wide; pedicel short, distinctly narrower than scape distally; first through seventh flagellomeres as preserved subequal in length and about 2–3 times as long as wide, remaining ones slightly longer than wide. Mesosoma stout, nearly as long as high. Pronotum comparatively long but partly covered by head. Mesonotum transversely ridged; mesoscutellum about half length of mesoscutum. Metanotum short; propodeum, metanotum and coxae coarsely areolate; propodeal foramen much closer to metapostnotum than to hind coxa. Legs incomplete, mid-coxa close hind-coxa, both swollen; hind leg with coxa thick, slightly longer than wide; trochanter swollen, nearly 2 times as long as wide; hind femur slightly longer and wider than mid femur. Fore wing with Rs origin far from pterostigma; first abscissa of Rs subvertical to R and Rs+M, 1Rs shorter than that of 1M and 0.8 times length of its distance to pterostigma; 2r-rs meeting Rs quite basad of 2r-m and slightly longer than the maximal width of 2rm; 2m-cu slightly basad of 2r-m, 2rm slightly longer and narrower than 3rm; 2rm in contact with 1mcu by a point, 1mcu nearly parallelogrammic, about 1.7 times as long as wide; cu-a postfurcal and slightly shorter than first abscissa of M. Metasoma long-ovoid, with seven segments; first segment broadly triangular and about as long as maximum width; remaining subequal in length and slightly shorter than first. Ovipositor slightly longer than fore wing.

Measurements in mm. Antenna length 4.2 (as preserved); head length 0.8, width 1.3 mm; mesosomal length 1.9; fore wing length 4.6, width 1.9; metasomal length 3.8; ovipositor length 5.8.

Figures

FIGURE 1 Archaulacus probus gen. et sp. nov.; (A) Photograph of holotype CNU-HYM-NN- 2012033; (B) Line drawing of holotype, body with wings; (C) Line drawing of fore wing; Scale bars: 1 mm.