microscopic

Source: Figure 39, page 52, Higgins & Kristensen 1986.

For key to abbreviations, see "Description"

Source: Figure 40, page 53, Higgins & Kristensen 1986.

Source: Figure 37, page 50, Higgins & Kristensen 1986.

For key to abbreviations, see "Description"

Source: Figure 38, page 51, Higgins & Kristensen 1986.

Source: Figure 1, page 39, Higgins & Kristensen 1986.

For key to abbreviations, see "Description"

source: Higgins & Kristensen 1986 (figure 2)

Source: Danovaro R., Dell'Anno A., Pusceddu A., Gambi C., Heiner I. & Kristensen R. M. (2010). "The first metazoa living in permanently anoxic conditions". BMC Biology 8: 30.