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-radiate, with a strong middle rod and a variable number of shorter radiating shanks on the two ends 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-radiate, with a strong middle rod and a variable number of longer radiant 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-radiate, with a very variable number of rays (two to six) on each end of the thin middle rod.

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

  Ernst Haeckel

• All spicula very thin and delicate, smooth, with curved or bent shanks, densely covering the central capsule like a cobweb.

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

  Ernst Haeckel