FIGURE 4. The Lower Cambrian agnathan vertebrate Haikouichthys ercaicunensis Luo, Hu & Shu gen. et sp. nov. from Haikou, Yunnan.
From the following article:
Lower Cambrian vertebrates from south China
D-G. Shu, H-L. Luo, S. Conway Morris, X-L. Zhang, S-X. Hu, L. Chen, J. Han, M. Zhu, Y. Li and L-Z. Chen
Nature 402, 42-46(4 November 1999)
doi:10.1038/46965
Specimen HZ-f-12-127. a, Entire specimen, anterior to the left; more posterior region appears to fade out into sediment, possibly representing decay of body; attempts to excavate this area were not successful. Scale bar equivalent to 5 mm. b, Detail of anterior to show putative gill bars, possible elements of cranial endoskeleton, and pericardic area; scale bar equivalent to 5 mm. c, Camera-lucida drawing of specimen to show interpretation. Numbers 1–6 indicate units of the branchial basket that are identified with some confidence; ?A–?C refer to less secure identifications. Two possible areas representing the pericardic cavity are indicated. To the anterior of ?C a triangular area with patches of diagenetic mineralization is one possibility; a fainter region to the posterior is the alternative location.
