Leptometra
General description:
Centrodorsal conical, usually as high as broad, sometimes broadly truncated and much lower; with up to 35 closely crowded cirrus sockets, arranged in 2 (rarely 3) columns beneath each radial, cirrus sockets on distal third to half of centrodorsal obsolet. Cirri long, peripheral consisting of 40–50 segments. All pinnules present, P1 and P2 alike, of the same length, P3 and following much shorter. (Based on Clark & Clark 1967.)