Information om | Engelska ordet OSTEICHTHYANS

Exempel på hur man kan använda OSTEICHTHYANS i en mening

• Acanthodians possess a mosaic of features shared with both osteichthyans (bony fish) and chondrichthyans (cartilaginous fish).
• These scales had a basic structure typical of many early osteichthyans, with a superficial of ganoine overlying dentine, and a basal plate of bone.
• Bony fish (osteichthyans) have four pairs of arches, cartilaginous fish (chondrichthyans) have five to seven pairs, and the more basal jawless fish ("agnathans") have up to seven.
• It is an element of the Early Vertebrate fauna in the Xishancun Formation, and lived among polybranchiaspid galeaspids, antiarchs, arthrodires, petalichthyids and osteichthyans.
• The many primitive features of Guiyu and other "psarolepids" have led palaeontologists to suggest that they were stem-group osteichthyans instead, lying outside the clade formed by actinopterygians and sarcopterygians.
• Unlike modern chondrichthyans, the first four branchial arches have two pairs of pharyngobranchials which bend forwards to form a solid roof to the gill cavity, conditions akin to the two sets (infra- and supra-pharyngobranchials) of osteichthyans.

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