An analysis of testicular morphology and spermatogenesis in the Heteroptera species Antiteuchus tripterus (Pentatomidae) revealed that these traits differ from that recorded for other species of the same family. The testes of A. tripterus have only six lobes, while other species of the same family typically have seven lobes, including a compound lobe, i.e., a lobe containing another in its lumen. A study of meiosis and sperm structure in the different lobes of A. tripterus revealed a conventional meiosis in the lobes numbered one to three. In lobe four, however, prophase I spermatocytes exhibit the morphological characteristics of the so called "diffuse" stage and are larger than those in lobes 1-3 in this and the remaining phases of meiosis. Thus, the resulting spermatids are not only larger but also their head is morphologically different. Lobe 5 exhibits characteristics known from other Pentatomidae species such as an uneven distribution of chromatin to the daughter cells, which give rise to cells of different sizes. This lobe forms spermatozoa of different sizes. Lobe 6, contained within lobe 5, differs from it by having larger cells at a stage similar to the so called "diffuse" and spermatid tails with cross divisions, which are not found in other lobes and unreported in the literature.
The Central American genus Macrotingis Champion, 1897 was revised and the morphological characters of the species of Macrotingis and those of its sister group Ceratotingis Montemayor, 2008 were subjected to a phylogenetic analysis. A species previously placed in the genus Tigava is now Ceratotingis spatula (Monte, 1945), new combination. Cladistic analysis indicates that both genera are monophyletic and defined the relationships between species. Keys to the species in these genera are provided together with illustrations of their main morphological characters and a map of their distribution in Central America.