Heterostracan Stock Photos and Images

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Heterostracan Stock Photos and Images

Anglaspis is a heterostracan from the Early Devonian of Norway. Stock Photo

RFHG64WW–Anglaspis is a heterostracan from the Early Devonian of Norway.

Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum Stock Photo

RM2HDDW77–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

Ctenaspis is a jawless fish from the Early Devonian of Norway. Stock Photo

RFHG64X9–Ctenaspis is a jawless fish from the Early Devonian of Norway.

Pteraspis was a carnivorous marine fish that was heavily armored and lived during the Devonian Period. Stock Photo

RF2A5MY21–Pteraspis was a carnivorous marine fish that was heavily armored and lived during the Devonian Period.

. Chordate morphology. Morphology (Animals); Chordata. the present. The position of the nasohypophyseal opening on the top of the head in the osteostracan and anaspid sug- gests relationship with the lamprey. The position of this opening at the tip of the snout in the myxinid, along with the general separation of cranial and branchial skeletons suggest as close a relationship between the hagfish and lamprey as with the heterostracan. The many differences in structure of the hagfish as compared with the lamprey sug- gest that the two living lines arose at the time of the pri- mary radiation of Stock Photo

RMRJ4YPB–. Chordate morphology. Morphology (Animals); Chordata. the present. The position of the nasohypophyseal opening on the top of the head in the osteostracan and anaspid sug- gests relationship with the lamprey. The position of this opening at the tip of the snout in the myxinid, along with the general separation of cranial and branchial skeletons suggest as close a relationship between the hagfish and lamprey as with the heterostracan. The many differences in structure of the hagfish as compared with the lamprey sug- gest that the two living lines arose at the time of the pri- mary radiation of

RM2HDDWA6–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

Drepanaspis is a jawless fish from the Early Devonian of Germany. Stock Photo

RFHG64XB–Drepanaspis is a jawless fish from the Early Devonian of Germany.

RF2A5MY23–Pteraspis was a carnivorous marine fish that was heavily armored and lived during the Devonian Period.

. Chordate morphology. Morphology (Animals); Chordata. cornual plate (fin) orogoniale 'postorbital canal 1 bronchial plate bronchia! opening ventral sensory line. Figure 5-32. Structure of Cepholothorax of Simopterospis primoevo, a heterostracan. A, lateral view with main sensory canols shown; B, dorsal view; C, ventral view; D, dorsal view of cast of internal surface of bony armor. (After Stensio, 1 958) were acquired by the fusion of small denticles into polygonal plates and these into larger units. Not all agnaths tended to develop a dermal skeleton and of those that did, the time and seque Stock Photo

RMRJ4YPG–. Chordate morphology. Morphology (Animals); Chordata. cornual plate (fin) orogoniale 'postorbital canal 1 bronchial plate bronchia! opening ventral sensory line. Figure 5-32. Structure of Cepholothorax of Simopterospis primoevo, a heterostracan. A, lateral view with main sensory canols shown; B, dorsal view; C, ventral view; D, dorsal view of cast of internal surface of bony armor. (After Stensio, 1 958) were acquired by the fusion of small denticles into polygonal plates and these into larger units. Not all agnaths tended to develop a dermal skeleton and of those that did, the time and seque

RFRC3DEH–Pteraspis Fish Side Profile - Pteraspis was a primitive jawless fish that lived in the oceans of the Devonian Period.

RM2HDDW3D–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW5N–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW83–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW1M–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW8R–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW24–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW9C–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW13–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW43–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDW56–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDTYK–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDTPT–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDTTR–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

RM2HDDTP6–Royal Tyrrell Museum, Canada - Dec. 21 2021: The gigantesque dinosaures fossiles in Royal Tyrrell Museum

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Heterostracan Stock Photos and Images

Heterostracan Stock Photos and Images

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