| the sperm structure and spermiogenesis of the heteropteran coptosoma scutellatum (geoffroy) with emphasis on the development of the centriole adjunct. | the sperm structure and spermiogenesis of the morphologically peculiar heteropteran coptosoma scutellatum has been examined with electron microscopy. the sperm has a short monolayer acrosome, a cylindrical nucleus, a 9+9+2 axoneme and two mitochondrial derivatives with crystallized matrix. it shows the synapomorphies typical of the group, consisting of (a) two crystallized areas in the mitochondrial derivatives; (b) the presence of two bridges connecting the intertubular material of the flagella ... | 2016 | 26774743 |
| ultrastructure of the midgut in heteroptera (hemiptera) with different feeding habits. | heteroptera have diverse feeding habits with phytophagous, zoophagous, and haematophagous species. this dietary diversity associated with the monophyly of heteroptera makes these insects a good object for comparative studies of the digestive tract. this work compares the ultrastructure of the middle midgut region in the phytophagous coptosoma scutellatum (plataspidae), graphosoma lineatum (pentatomidae), kleidocerys resedae (lygaeidae), and zoophagous rhynocoris iracundus (reduviidae), nabis rug ... | 2017 | 28064339 |