(Furficulichthys)
4 Species:
Ichthydium (F. ) forcipatum
Ichthydium (F. ) forficula
160 µm - 170 µmDorsal scales: none, posterior setula on papilla
Ventral scales: none
Particularities: Very characteristic furca
Ichthydium (F. ) skandicum
Ichthydium (F. ) tanytrichum
74 µm - 126 µmDorsal scales: only triangular basal scales of terminal setolae
Ventral scales: naked except for two rectangular, unkeeled terminal plates; rows of cilia on trunk resolved into 4 pairs of ciliate tufts; bands of cilia united on head
Particularities: Very long dorsally visible cilia (27µm); very rare, only a few specimens in Italy and Sweden so far.