Caterino Michael S, Tishechkin Alexey K
Department of Agricultural & Environmental Sciences, Clemson University, Clemson, SC 29634-0310 USA.
USDA Systematic Entomology Laboratory, c/o Smithsonian Institution, National Museum of Natural History, Washington, DC 20013-7012.
Zookeys. 2016 Jan 28(557):59-78. doi: 10.3897/zookeys.557.7087. eCollection 2016.
The formely monotypic Neotropical genus Megalocraerus Lewis is revised to include five species, known from southeastern Brazil to Costa Rica: Megalocraerus rubricatus Lewis, Megalocraerus mandibularis sp. n., Megalocraerus chico sp. n., Megalocraerus madrededios sp. n., and Megalocraerus tiputini sp. n. We describe the species, map their distributions, and provide a key for their identification. Their subcylindrical body form and emarginate mesosternum have previously hindered placement to tribe, although their curent assignment to Exosternini now appears well supported by morphological evidence. Nothing is known of the natural history of the species.
以前单一型的新热带属大颚鳃金龟属（Megalocraerus Lewis）经过修订，现包括五个物种，分布于巴西东南部至哥斯达黎加：红大颚鳃金龟（Megalocraerus rubricatus Lewis）、下颌大颚鳃金龟（Megalocraerus mandibularis sp. n.）、奇科大颚鳃金龟（Megalocraerus chico sp. n.）、马德雷迪奥斯大颚鳃金龟（Megalocraerus madrededios sp. n.）和蒂普蒂尼大颚鳃金龟（Megalocraerus tiputini sp. n.）。我们描述了这些物种，绘制了它们的分布图，并提供了鉴别它们的检索表。它们亚圆柱形的体型和具缺刻的中胸腹板以前妨碍了其归属于某个族，不过根据形态学证据，它们目前归入外胸鳃金龟族（Exosternini）现在看来有充分支持。对这些物种的自然史一无所知。
