Information om | Engelska ordet AGNATHANS

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• 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.
• Lampreys belong to the Cyclostomata, which includes the extant hagfish, and this group may have split early on from other agnathans.
• Amphiaspidida is a taxon of extinct cyathaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Amphiaspidoidei is a taxon of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Hibernaspidoidei is a taxon of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Siberiaspidoidei is a taxon of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Amphiaspididae is a family of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Gabreyaspididae is a family of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Olbiaspididae is a family of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Hibernaspis is a genus of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Eglonaspididae is a family of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula.
• Furcacaudidae, the "'fork-tailed' agnathans," is an extinct family of thelodontid agnathans from the Lochkovian stage of the Early Devonian epoch and Wenlockian epoch of the Silurian, known from fossils found in Northern Canada.
• Archipelepis is a genus of extinct thelodont agnathans, and are the most primitive recognized thelodonts of which whole body fossils are known.
• Märss has been a grant holder of several research projects of the Estonian Science Foundation (ESF): 1995–1996, ESF grant 1666: Biozonal schemes of Silurian vertebrates; 1997–1999, ESF grant 2854: Evolutionary lineages of Silurian conodonts and early vertebrates, and high resolution stratigraphy; 2000–2002, ESF grant 4160: Early vertebrates (conodonts, agnathans, fishes) of Paadla age in the Palaeobaltic; 2004–2007, ESF grant 5726: Vertebrates of the Palaeobaltic Sea: taxonomy, phylogeny and distribution in the Silurian and Devonian 2008–2010, ESF grant 7334: Ultrasculpture on the exoskeleton of recent fishes, and its value in the taxonomy and systematics of fishes.
• Anaspids were small, primarily marine agnathans that lacked heavy bony shield and paired fins, but have highly exaggerated hypocercal tails.

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