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That much is apparent on “Asteroidea,” its engrossing debut album of free improvisations, released in October.

He recently joined two other serious talents — the pianist Kris Davis and the drummer Eric McPherson — to form the Borderlands Trio, which released its debut this year, the freely improvised “Asteroidea.”

To this point we shall recur; palaeontology, though it suggests a clue, does not furnish an actual link either between Echinoidea and Asteroidea, or between those classes and Pelmatozoa.