cephalaspid

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Noun

cephalaspid - extinct jawless fish of the Devonian with armored head

agnathan, jawless fish, jawless vertebrate - eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms

Cephalaspida, Osteostraci, suborder Cephalaspida, suborder Osteostraci - extinct group of armored fish-like vertebrates; taxonomy is not clear

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Reproductive morphology, mating behavior, and spawning ecology of cephalaspid sea slugs (Aglaji-dae and Gastropteridae).

Color pattern variation in a shallow-water species of opisthobranch mollusc

This pattern is not unique for the Pulmonata, but is shared by a great number of Opisthobranchia, especially the cephalaspid stem group.

Cleavage patterns and mesentoblast formation in the Gastropoda: an evolutionary perspective

A new cephalaspid fish from the Downtonian of Scotland, with notes on the structure and classification of ostracoderms.

Anatomy of the Silurian thelodont Phlebolepis elegans Pander/Siluri telodondi Phlebolepis elegans Pander anatoomia

At the opposite extreme, Schaefer and Ruthensteiner (2001) and Ruthensteiner and Schaefer (2002) found no evidence of an external pore for ampullary neurons in a selection of cephalaspid and pulmonate veligers.

Anti-tubulin labeling reveals ampullary neuron ciliary bundles in opisthobranch larvae and a new putative neural structure associated with the apical ganglion

Cephalaspids (= osteostracans) from the Lochkovian MOTH locality of the Northwest Territories were described by Dineley and Loeffler (1976) and Adrain and Wilson (1994), but none has an ornament that closely resembles the Eastport Formation specimens.

Microvertebrates from the Silurian-Devonian boundary beds of the Eastport Formation, Maine, eastern USA

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