Enigmatic Typhloesus wellsi: Now transitional between lancelets and sea cucumbers

Based on tracings presented here
(Figs. 1, 4), Typhloesus is transitional between lancelets and sea cucumbers sharing traits once considered unique to each type.Let’s compare traditional interpretations with several novel ones offered here. Please note that several were proposed by Melton and Scott 1972, then later misinterpreted by Conway Morris 1990.

This appears to be a novel hypothesis of interrelationships.
If not, please provide a prior citation so I can promote it here.

PS
Nowadays, sea cucumbers can be temporary homes for pearlfish, the relative size and elongate shape of extinct conodonts. They enter and exit through ‘the back door.’ If analogous, maybe a tiny conodont was living inside Typhloesus when it was fossilized, rather than the conodont being a prey item. With sea cucumbers, perhaps uniquely, this possibility must be considered.