spicula

Historical Examples of spicula

• The spicula are quite smooth, as in the similar Sphrozoum ovodimare (in which, however, the axial rod is much longer).

  Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia)

  Ernst Haeckel

• Spicula all geminate-triradiate, with a stout and short middle rod and three arborescent shanks on each end of it.

  Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia)

  Ernst Haeckel

• Spicula all together geminate-triradiate, with a simple stout middle rod and three arborescent shanks on each end of it.

  Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia)

  Ernst Haeckel

• Spicula all geminate-triradiate, with a short simple middle rod and three much longer arborescent shanks on each end of it.

  Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia)

  Ernst Haeckel

• Spicula all geminate-quadriradiate, with a short simple middle rod and four diverging shanks on each end of it.

  Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, First Part: Porulosa (Spumellaria and Acantharia)

  Ernst Haeckel