File:Wheeler and Holldobler 1985 fig 1 var.jpg

Summary
Fig. I. Zacryptocerus varians (Upper Matecumbe Key, FL). Soldier. a. SEM view of relatively clean cephalic shield, b. Surface of clean shield. Note the numerous pores (glandular openings).

Wheeler, D. E. and B. Hölldobler. 1986 (1985). Cryptic phargmosis: the structural modifications. Psyche. 92:337-353. DOI:10.1155/1985/76848