File:Fig. 4 Billen and Al-Khalifa 2018, Conv gland of b sennarensis worker.png

Fig. 4. Convoluted gland of B. sennaarensis worker. A. Scanning micrograph showing striated appearance of convoluted gland (CG) after tearing open venom reservoir (RW: reservoir wall). B. Detail of convoluted gland surface (of area indicated by black frame in 4A), arrowheads show openings of gland ducts. C. Detail of inner reservoir wall (of area indicated by white frame in 4A). D,E. Electron micrographs of central (D) and peripheral (E) portion of convoluted gland, showing presence of secretory cells with end apparatus (EA). M: mitochondria, MF: muscle fibres, N: nucleus, VF: venom filaments.