New jawless fish found from the Lower Devonian of Yunnan, China

The Galeaspida is a clade of armored jawless vertebrates. Most galeaspids have a strongly flattened head-shield, dorsally set eyes, and a ventral mouth, indicating a benthic lifestyle moving on sandy or muddy substrates in coastal, marine environment. Dr. ZHU Min, Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Chinese Academy of Sciences, and his team described a new galeaspid, Rhegmaspis xiphoidea, from the Lower Devonian Posongchong Formation of Zhaotong, Yunnan Province, China. The new form has a torpedo-shaped head-shield, a long rostral process and ventrolaterally set eyes, which highlight an adaptation to an active suprabenthic lifestyle as reported in the journal of Vertebrata PalAsiatica. —> Read More