caa a22 4500 445299304 CHVBK 20180317142552.0 cr unu---uuuuu 170323e20100101xx s 000 0 eng 10.1007/s11430-010-0006-2 doi (NATIONALLICENCE)springer-10.1007/s11430-010-0006-2 The developmental trend of labrum and median eyes of Orsten-type preserved Phosphatocopina (Crustacea) [Elektronische Daten] [Zheng Liu, XiPing Dong] The Phosphatocopina (Crustacea, Arthropoda) is an important group of ‘Orsten-type' preserved fossils. It is resolved as the sister-group of Eucrustacea. Here we study the labrum, the median eyes, and the inner lamella of Phosphatocopina based on the selected specimens respectively from western Hunan, South China, and Sweden. The labrum characters of different species exhibit interspecific difference. The ratio of labrum length/shield length is significant to the reconstruction of the ontogeny of phosphatocopines. The labrum characters should be introduced to the diagnosis of Phosphatocopina. In the earliest growth stage, the median eyes were inconspicuous, almost as flat as the other area of the hypstome. However, with the growth of the individuals they became conspicuous. There were two obviously concave structures on the ventral side of the hypostome in later stages, which were the positions where the median eyes should have been located. In addition, the two modes of preservation of the inner lamella, i.e., that of shrinking and that of bulging up, are interpreted as the preservational artifact herein. Science in China Press and Springer Berlin Heidelberg, 2010 Phosphatocopina nationallicence Crustacea nationallicence Orsten-type preservation nationallicence morphology nationallicence ontogeny nationallicence Cambrian nationallicence South China nationallicence Sweden nationallicence Liu Zheng School of Earth and Space Sciences, Peking University, 100871, Beijing, China aut Dong XiPing School of Earth and Space Sciences, Peking University, 100871, Beijing, China aut Science in China Series D: Earth Sciences SP Science in China Press 53/1(2010-01-01), 18-26 1674-7313 53:1<18 2010 53 11430 https://doi.org/10.1007/s11430-010-0006-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-0006-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Zheng School of Earth and Space Sciences, Peking University, 100871, Beijing, China aut NATIONALLICENCE 700 1- Dong XiPing School of Earth and Space Sciences, Peking University, 100871, Beijing, China aut NATIONALLICENCE 773 0- Science in China Series D: Earth Sciences SP Science in China Press 53/1(2010-01-01), 18-26 1674-7313 53:1<18 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer