Anaspida

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Anaspida

[ə′nas·pə·də]
(paleontology)
An order of extinct fresh- or brackish-water vertebrates in the class Agnatha.
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References in periodicals archive ?
Rich thelodont, osteostracan and anaspid fauna with Phl.
anaspid Tahulalepis elongituberculata Blom, Marss & Miller; acanthodians Nostolepis striata Pander, Gomphonchus sandelensis (Pander), Poracanthodes porosus Brotzen.
They come from grey and greenish-grey limestones with thin interlayers of clay containing also ostracodes, bivalves, and scales of thelodonts, fragments of osteostracans and anaspids.
Other vertebrates in the samples comprise Thelodus parvidens Agassiz, Thelodus sculptilis Gross, two to three different cyathaspidid heterostracans, two anaspids, two osteostracans, and acanthodians Nostolepis striata Pander, Gomphonchus sandelensis (Pander), and Poracanthodes porosus Brotzen.