| Name | Tapeinidium longipinnulum (Cesati) C. Christensen | 
| Authorship | (Cesati) C. Christensen | 
| Rank | Species | 
| Placed in | Tapeinidium | 
| Citation | 1934 Index Filic., Suppl. Tertium pro Annis 1917-1933 176 | 
| Holdings | 20 Specimens held in the Harvard University Herbaria identified as Tapeinidium longipinnulum (Cesati) C. Christensen | 
| Identification made in | [no date] (20) | 
