Anaspida

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Noun1.Anaspida - extinct order of jawless vertebrates
animal order - the order of animals
Agnatha, superclass Agnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms
anaspid - extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
References in periodicals archive ?
Paralogania martinssoni (Gross), Phlebolepis elegans Pander, osteostracans Tremataspis mammillata Patten, Dartmuthia gemmifera Patten, Oeselaspis pustulata Patten, Procephalaspis oeselensis (Robertson), and anaspids Schidiosteus mustelensis Pander and Pharyngolepis?
martinssoni occurs together with the thelodont Thelodus laevis (Pander), the osteostracans Tremataspis schmidti Rohon, Tremataspis milleri Patten, Saaremaaspis mickwitzi (Rohon), Oeselaspis pustulata Patten, Witaaspis schrenkii (Pander), Thyestes verrucosus Eichwald, and the anaspids Rhyncholepis parvula Kiaer, R.