Sasajiscymnus sylvaticus species group
The Sasajiscymnus sylvaticus species group is characterized by the long and slender penis with short outer arm, apex of penis simple without appendage, penis guide sometimes bifurcated apically, interocular distance greater than eye width in frontal view, abdominal postcoxal lines recurved toward the base of ventrite, and triangular coxites usually elongate.
12 species of sylvaticus group are recorded from China, including 5 new species.
Key to the species of sylvaticus group within the genus Sasajiscymnus Vandenberg, 2004
1. Elytra entirely black................................................................................... 2
- Elytra black with yellowish brown apices.................................................................. 5
2. Penis guide widest at base in ventral view.................................................................. 3
- Penis guide approximately widest at basal 1/ 3 in ventral view (Fig. 4g)...... Sasajiscymnus fusinus Tong & Wang sp. nov.
3. Parameres about 1/2 as long as penis guide................................................................. 4
- Parameres about 3/4 as long as penis guide................................. Sasajiscymnus tainanensis (Ohta, 1929)
4. Penis guide apically pointed in ventral view (Fig. 5h)..................... Sasajiscymnus acutus Tong & Wang sp. nov.
- Penis guide apically rounded in ventral view (Fig. 6h)....................... Sasajiscymnus anmashanus (Yang, 1971)
5. Pronotum entirely yellow to yellowish brown............................................................... 6
- Pronotum partly or entirely black......................................................................... 7
6. Pronotum yellow; scutellar shield black (Fig. 7a)...................... Sasajiscymnus cultratus Tong & Wang sp. nov.
- Pronotum yellowish brown; scutellar shield dark brown (Fig. 8a)................ Sasajiscymnus sylvaticus (Lewis, 1896)
7. Pronotum entirely black................................................................................ 8
- Pronotum yellowish brown with a black spot at base (Fig. 9a)................. Sasajiscymnus ohtai (Yang & Wu, 1972)
8. Parameres not dilated.................................................................................. 9
- Parameres distinctly dilated in lateral view (Fig. 10f).................. Sasajiscymnus subulatus Tong & Wang sp. nov.
9. Penis guide widest at base in ventral view................................................................. 10
- Penis guide approximately widest at 1/2 length in ventral view (Fig. 11h).. Sasajiscymnus lishanicus Tong & Wang sp. nov.
10. Parameres about 3/4 as long as penis guide................................................................ 11
- Parameres about 1/2 as long as penis guide...................................... Sasajiscymnus jenai Kitano, 2012
11. Penis guide apically pointed in ventral view (Fig. 12g).......................... Sasajiscymnus nakanei (Araki, 1963)
- Penis guide apically rounded in ventral view................................. Sasajiscymnus hosonaga Kitano, 2012