Matsumuraja Schumacher, 1921

Xu, Ying, Chen, Jing, Jiang, Liyun & Qiao, Gexia, 2024, Revision of Matsumuraja (Hemiptera, Aphidinae, Macrosiphini) in China with two new synonyms and four new records, Zootaxa 5477 (1), pp. 27-42 : 41

Key to species of Matsumuraja Schumacher in China

1. Abdominal tergites I–VII with paired long finger-like spinal or marginal tubercles. Dorsal setae shorter than dorsal tubercles 2 Abdominal tergites I–VII with paired short conical dorsal tubercles. Dorsal setae longer than dorsal tubercles............ 4

2. Abdominal tergites I– V each with one pair of long finger-like marginal tubercles, without spinal tubercles; dorsal seta short and capitate; SIPH long cylindrical, curved inward, without flange.......................................... M. urticae Abdominal tergites I– V each with one pair of long finger-like or slightly swollen marginal tubercles, and with developed spinal tubercles; dorsal seta thick, long and capitate; SIPH long cylindrical, straight, with developed flange................... 3

3. Thoracic nota and abdominal tergites I–IV each with one paired long finger-like marginal tubercles, as long as the spinal tubercles; the setae on the apices of the marginal tubercles shorter than the tubercles....................... M. rubicola Thoracic nota and abdominal tergites I–IV each with one paired slightly swollen marginal tubercles, shorter than long finger-like spinal tubercles; the setae on the apices of the marginal tubercles distinctly longer than the tubercles........... M. rubi

4. Dorsal setae of abdominal tergites I– V short, blunt, or capitate, short than Ant. IIIBD, only spinal setae of abdominal tergites VI –VIII long and capitate............................................................................... 5 Dorsal setae of abdomen long, thick and capitate, longer than Ant. IIIBD......................................... 6

5. Ant. I with one long finger-like process on the inner side, 0.61–1.00 times as long as the segment............ M. rubiphila Ant. I with one short finger-like process on the inner side, 0.41–0.58 times as long as the segment........... M. rubifoliae

6. Ant. I with one long sausage-like process on the inner side, 0.70–1.12 times the segment.................. M. formosana Ant. I with one short, thick, finger-like process on the inner side, 0.30–0.64 times the segment............ M. taisetsusana