caa a22 4500 445299924 CHVBK 20180317142554.0 cr unu---uuuuu 170323e20101201xx s 000 0 eng 10.1007/s11430-010-4089-6 doi (NATIONALLICENCE)springer-10.1007/s11430-010-4089-6 Cranial morphology of the Silurian sarcopterygian Guiyu oneiros (Gnathostomata: Osteichthyes) [Elektronische Daten] [Tuo Qiao, Min Zhu] Cranial morphological features of the stem-group sarcopterygian Guiyu oneiros Zhu et al., 2009 provided here include the dermal bone pattern and anatomical details of the ethmosphenoid. Based on those features, we restored, for the first time, the skull roof bone pattern in the Guiyu clade that comprises Psarolepis and Achoania. Comparisons with Onychodus, Achoania, coelacanths, and actinopterygians show that the posterior nostril enclosed by the preorbital or the preorbital process is shared by actinopterygians and sarcopterygians, and the lachrymals in sarcopterygians and actinopterygians are not homologous. The endocranium closely resembles that of Psarolepis, Achoania and Onychodus; however, the attachment area of the vomer possesses irregular ridges and grooves as in Youngolepis and Diabolepis. The orbito-nasal canal is positioned mesial to the nasal capsule as in Youngolepis and porolepiforms. The position of the hypophysial canal at the same level or slightly anterior to the ethmoid articulation represents a synapmorphy of the Guiyu clade. The large attachment area of the basicranial muscle indicates the presence of a well-developed intracranial joint in Guiyu. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 Sarcopterygii nationallicence Osteichthyes nationallicence Cranial morphology nationallicence homology nationallicence Silurian nationallicence China nationallicence Qiao Tuo Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 100044, Beijing, China aut Zhu Min Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 100044, Beijing, China aut Science China Earth Sciences SP Science China Press 53/12(2010-12-01), 1836-1848 1674-7313 53:12<1836 2010 53 11430 https://doi.org/10.1007/s11430-010-4089-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-4089-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Qiao Tuo Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 100044, Beijing, China aut NATIONALLICENCE 700 1- Zhu Min Key Laboratory of Evolutionary Systematics of Vertebrates, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 100044, Beijing, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/12(2010-12-01), 1836-1848 1674-7313 53:12<1836 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer