Figure 24 from: Rocha MM, Constantini JP (2015) Internal ornamentation of the first proctodeal segment of the digestive tube of Syntermitinae (Isoptera, Termitidae). Deutsche Entomologische Zeitschrift 62(1): 29-44. https://doi.org/10.3897/dez.62.8550

Figure 24 - Syntermes spinosus. (a) Schematic drawing of P1 showing arrangement of spines. (b, c) Photomicrographs: (b) General view of sclerotized spines between the mesenteric tongues; (c) Detail of the strongly sclerotized spines with their bases merged.