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・ Amphiagrion
・ Amphiallagma parvum
・ Amphianthus
・ Amphianthus dohrnii
・ Amphiaraos Krater
・ Amphiaraus
・ Amphiaraus (play)
・ Amphiareion of Oropos
・ Amphiarius
・ Amphiarius phrygiatus
・ Amphiarius rugispinis
・ Amphiarthrosis
・ Amphiasma
・ Amphiaspidida
・ Amphiaspididae
Amphiaspidoidei
・ Amphiaspis
・ Amphibacillus xylanus
・ Amphibalanus
・ Amphibalanus amphitrite
・ Amphibalus
・ Amphibamidae
・ Amphibamus
・ Amphibia (album)
・ Amphibia in the 10th edition of Systema Naturae
・ Amphibian
・ Amphibian (comics)
・ Amphibian (disambiguation)
・ Amphibian Airplanes of Canada
・ Amphibian and Reptile Conservation Trust


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Amphiaspidoidei : ウィキペディア英語版
Amphiaspidoidei

Amphiaspidoidei is a taxon of extinct amphiaspidid heterostracan agnathans whose fossils are restricted to Lower Devonian marine strata of Siberia near the Taimyr Peninsula. In life, the amphiaspidids of Amphiaspidoidei are thought to be benthic animals that lived most of their lives mostly buried in the sediment of a series of hypersaline lagoons. Amphiaspids are easily distinguished from other heterostracans in that all of the plates of the cephalothorax armor are fused into a single, muff-like unit, so that the forebody of the living animal would have looked like a potpie or a hot waterbottle with a pair of small, or degenerated eyes flanked by preorbital openings, a pair of branchial openings for exhaling, and a simple, slit-like mouth.
==Taxonomy==
The superfamily Amphiaspidoidei contains four families.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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