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Heterostraci

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Noun1.Heterostraci - extinct group of armored jawless fishes or fish-like vertebrate; taxonomy is not clear
suborder Heterostraci
animal order - the order of animals
order Ostracodermi, Ostracodermi - extinct group of armored jawless vertebrates; taxonomy is not clear
heterostracan - extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
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Insufficient knowledge has hindered phylogenetic study of the group Heterostraci as a whole, so there has been uncertainty about its relationships with other tessellated heterostracans (e.
Late Silurian--early Devonian tessellated heterostracan Oniscolepis ... by Marss, Tiiu; Karatajute-Talimaa, Valentina / Estonian Journal of Earth Sciences
Because of new information discovered by the fossil turnaround,Elliott believes that this fossil and several similar ones had been inappropriately assigned to an order of fish, Heterostraci, whose members have only a single set of tube-like openings that run to the gills.
Facing up to a backwards fossil by Science News
New Thelodonti, Heterostraci and Arthrodina from the Chortkov Stage of Podolia.
Karksilepis parva gen. et sp. nov. (Chondrichthyes) from the ... by Marss, Tiiu; Kleesment, Anne; Niit, Moonika / Estonian Journal of Earth Sciences
 
 
 
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