Table 1 Description of microtrich structures on the cuticular surface of some representatives of marine isopods

Excirolana orientalis

Cuticular depressions are furnished with three to four knobs arranged in a semi-circular row; collar short, oval, anterior margin shorter than posterior one; shaft short with a tuft of long filaments (Figures 2B and 3B).

≈30

Excirolana sp.

Cuticular depressions are furnished with three to five knobs arranged in a semi-circular row; collar short, anterior margin shorter than posterior one; shaft short with a tuft of long filaments (Figures 2A and 3A).

≈30

Lanocira sp.

Simple cuticular depression; collar very short, oval; shaft very short with a tuft of long filaments (Figure 2C).

≈12

Atarbolana sp.

Collar very short, round; shaft long.

≈5

Sphaeromopsis sarii

Shallow, flower-shaped cuticular depression; collar spool-shaped, large; shaft large with a tuft of long filaments (Figures 2D,E and 3D).

≈8

S. amathitis

Shallow, flower-shaped cuticular depression; collar spool-shaped, large; shaft large with a tuft of long filaments (Figure 3E).

10 to 12

S. mourei

Shallow, flower-shaped cuticular depression; collar spool-shaped, large; shaft large with a tuft of long filaments (Figure 3F).

6-8

Sphaeroma khalijfarsi

Collar short, shaft long with long filaments (Figures 2F and 4A).

≈8

S. walkeri

Collar short; shaft long with long filaments (Figure 4B).

4 to 5

Cymodoce sp.

Collar medium, shaft very long with very long filaments (Figures 2G and 4E).

5

Dynamenella granulata

Collar medium, shaft short with long filaments (Figure 4C).

5