Amphioxus

In fact, the very name amphioxus is from Greek words meaning "both-pointed," with reference to the two ends. ❋ Asimov, Isaac (1963)

In passing from the primitive chordates, such as amphioxus, into the vertebrate subphylum, one passes from an unspecialized nerve cord to one in which the anterior end has developed into the brain. ❋ Asimov, Isaac (1963)

This poor beastie is an amphioxus, though a more apposite appellation might have been "anxious". ❋ Unknown (2012)

In going from amphioxus to jawless fish to jawed fish to land vertebrates we see an increase in complexity of the clotting cascade: ❋ Unknown (2008)

The same mitochondrial DNA sequences placed echinoderms - which include starfish and sea urchins - in closer proximity to the vertebrates than amphioxus even though, being a chordate, we would expect amphioxus to be closer (Ref 2). ❋ Unknown (2008)

The chordate amphioxus in modern taxonomy, Branchiostoma and its relatives, a protovertebrate that looks a bit like a minature eel, does clot its haemolymph. ❋ Unknown (2007)

Presence of prophenoloxidase in the humoral fluid of amphioxus Branchiostoma belcheri tsingtauense. ❋ Unknown (2007)

All of them are potentially testable via molecular clocks and whole-genome studies on a variety of protoverebrates we need the amphioxus genome, apparently due out this year and vertebrates, as well as reconstruction of the common ancestral proteins. ❋ Unknown (2007)

This is not dissimilar to the trypsin/prophenyloxidase system, in amphioxus, where a trypsin activates an enzyme prophenyloxidase to make gluggy melanin at wound sites 17. ❋ Unknown (2007)

A tadpole-like beastie similar to the chordate amphioxus. ❋ Unknown (2006)

But it is a suboptimal Heath Robinson “design” where the limitations of the original invert retina setup which were irrelevant to amphioxus and the small chordates in which the vertebrate eye evolved are worked around by kludges. ❋ Unknown (2006)

It's a long way from amphioxus to the meanest human cuss. ❋ Jhetley (2005)

It's a long, long way from amphioxus, but we all came from there. ❋ Jhetley (2005)

It's a long way from amphioxus, it's a long way to us. ❋ Jhetley (2005)

For one thing, the amphioxus turns out to have not much of a head. ❋ Asimov, Isaac (1963)

Here he adopts the investigations of A. Kowalewsky, and the deductions of Häckel founded upon them, concerning the larva of the ascidiæ, a genus of marine mollusca of the order tunicata, and sees in a cord, to be found in this larva, most decided relationship to the spine of the lancelet fish or amphioxus, the lowest of all the vertebrates, it being yet doubtful whether it belongs at all to the vertebrates. ❋ Rudolf Schmid (N/A)

In the amphioxus the notochord persists and forms the only representative of a skeleton in that animal. ❋ Unknown (1918)

Hence the anterior end of the future amphioxus, the head end, is pointing towards the Figure 6, and the letters ep. are marked on the side which will be dorsal. ❋ Unknown (1906)

Compare the atrial cavity and coelom of amphioxus. ❋ Unknown (1906)