Appears to earliest illustration of oligotrich and tintinnid ciliates in 'Fig. 1' of Plate 10 from Baster 1757

Source: Baster, J. (1757). XXXII. Observationes de corallinis, iisque insidentibus polypis, aliisque animalculis marinis: Quas Regiæ Societati Londinenst offert Job Baster, Med. Doct. Acad. Cæsar. Reg. Societ. Lond. & Scient. Holland. Socius. Philosophical Transactions of the Royal Society of London, (50), 258-280.