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Hajar | profile | all galleries >> Palaeogalleries >> Palaeozoic Vertebrates >> Agnathans tree view | thumbnails | slideshow

Agnathans

I enjoy Richard Dawkins' book "The Ancestor's Tale." The Haikouella (with its beautifully preserved branchial arches and visible eye) is very like his Concestor 23 and the Mayomyzon is a good illustration of concestor 22.
Haikouella lanceolata to 3 cm long, Lower Cambrian, Chengjiang biota. 6 pairs of branchial arches are visible as is an eye.
Haikouella lanceolata to 3 cm long, Lower Cambrian, Chengjiang biota. 6 pairs of branchial arches are visible as is an eye.		 Tremataspis mammilata headshield, 32 mm, both dorsal and ventral sides exposed, Wenlock, Silurian, Elda Cliff, Osel
Tremataspis mammilata headshield, 32 mm, both dorsal and ventral sides exposed, Wenlock, Silurian, Elda Cliff, Osel		 Tremataspis face showing eye opening and nasohypophysial opening, 7 mm field of view.
Tremataspis "face" showing eye opening and nasohypophysial opening, 7 mm field of view.		 Thyestes verrucosus, headshield 2 cm long, from the Ludlow of Rootzikull, near Kielkond, Ösel (Saaremaa)
Thyestes verrucosus, headshield 2 cm long, from the Ludlow of Rootzikull, near Kielkond, Ösel (Saaremaa)
Cyathaspis banksii, 43 mm headshield of a Silurian heterostracan agnathan.
Cyathaspis banksii, 43 mm headshield of a Silurian heterostracan agnathan. 		Stensiopelta head shield, Lower Devonian, Ukraine
Stensiopelta head shield, Lower Devonian, Ukraine		 Articulated pteraspid, 16 cm along curve, Lower Devonian, Ukraine
Articulated pteraspid, 16 cm along curve, Lower Devonian, Ukraine		 Pteraspid multiple, Lower Devonian, Ukraine
Pteraspid multiple, Lower Devonian, Ukraine
Ventral pteraspid, 10 cm, Lower Devonian, Ukraine, note the oral plates
Ventral pteraspid, 10 cm, Lower Devonian, Ukraine, note the oral plates		 Polybranchiaspis, 5 cm, Lower Devonian, Yunnan
Polybranchiaspis, 5 cm, Lower Devonian, Yunnan		 Mazon Creek Gilpichthys greeni, an agnathan fish, 65 mm long
Mazon Creek Gilpichthys greeni, an agnathan fish, 65 mm long		 Mazon Creek Mayomyzon pieckoensis a 45 mm complete lamprey.
Mazon Creek Mayomyzon pieckoensis a 45 mm complete lamprey.

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