Schafer R, Sanchez T V
J Morphol. 1976 Jun;149(2):139-57. doi: 10.1002/jmor.1051490202.
Sexual dimorphism in the distribution of antennal sense organs is common among adults of the genus Periplaneta. In three out of the four strains of Periplaneta americana examined, adult males had more contact chemoreceptros than females. In the fourth strain of P. americana and in P. australasiae, P. brunnea, P. fuliginosa, and P. japonica, no statistically supportable sexual dimorphism of contact chemoreceptors was found. However, in all strains and species of Periplaneta examined, sexual dimorphism was found in the total number and/or density of olfactory sensilla. Male adults had nearly twice as many olfactory sensilla as female adults. These observations are consistent with the behavioral observation that males within the genus Periplaneta rely on the reception of an airborne pheromone for the initiation of courtship behavior. In P. americana, where sexual dimorphism was found in the contact chemoreceptors, contact stimuli release the full wing raising display and presentation in males during courtship.
触角感觉器官分布的两性异形在蜚蠊属成虫中很常见。在所检测的四种美洲大蠊品系中，有三种品系的成年雄性比雌性拥有更多的接触化学感受器。在第四种美洲大蠊品系以及澳洲大蠊、褐斑大蠊、黑胸大蠊和日本大蠊中，未发现接触化学感受器存在统计学上可支持的两性异形。然而，在所有检测的蜚蠊品系和物种中，嗅觉感受器的总数和/或密度存在两性异形。成年雄性的嗅觉感受器数量几乎是成年雌性的两倍。这些观察结果与行为观察一致，即蜚蠊属内的雄性依靠接收空气中的信息素来启动求偶行为。在接触化学感受器存在两性异形的美洲大蠊中，接触刺激会引发雄性在求偶期间完全展开翅膀并进行展示。
