Neopterygian Fish with Secondary Sexual Characteristics Found from the Middle Triassic of China
In a paper published online 23 January in the journal of Science Bulletin, Dr. XU Guanghui, Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Chinese Academy of Sciences, and his collaborator reported a new sexually dimorphic primitive neopterygian fish, Venusichthys comptus, based on 30 exceptionally well-preserved specimens from the Middle Triassic (Pelsonian, Anisian) Luoping Lagerst?tte of eastern Yunnan, China. The discovery represents the oldest known secondary sexual characteristics in Neopterygii, and provides an important addition for understanding the behavior, reproduction, and early diversification of Neopterygii.