赫克力士长戟大兜虫（学名：Dynastes hercules），又名「赫克力士大兜虫」，成虫体长最长纪录为可达178毫米，是全世界最大的甲虫。力量极大，可以举起自身体重850倍的物体，因此以希腊神话中的大力士海克力士命名，然而，一般显示其承载能力仅达100倍的体重。和一般所称的「独角仙」不同，而正式的独角仙指的是叉犀金龟属当中的独角仙和其的六个亚种。

长戟大兜虫属完全变态，幼虫期约1-1.5年，长度可达180毫米，重量可达150克。幼虫期之后会化蛹，羽化之后的成虫以树汁或腐烂的水果为食。

长戟大兜虫两性异型：

The Hercules beetle (Dynastes hercules) is the most famous and the largest of the rhinoceros beetles. It is native to the rainforests of Central America, South America, and the Lesser Antilles. The beetle has also been observed as far north as Southern Veracruz in Mexico. It is the largest of the six species in the Dynastes genus, and one of the largest beetles known, up to 17 cm (6.5 in) in length it is only exceeded by two other beetles in the family Cerambycidae, Macrodontia cervicornis (specimens of 17–17.5 cm are known) and Titanus giganteus (also up to 17–17.5 cm; several 18+ cm specimens are reputed/alleged to exist). However, if the horns are excluded, both M. cervicornis and D. hercules drop considerably farther down in the size rankings, leaving T. giganteus on top. One reason for this is that the development of the horns is allometric, as well as sexually dimorphic, and thus not strictly correlated to actual body size; it is possible for a female to be much longer, measured from eyes to abdomen, than a male, yet be considered "smaller" simply due to the absence of horns.