Order: Chordariales
Systematics :
| Kingdom | Det gule riket (Chromista) | |||||||
| Phylum | Ochrophyta | |||||||
| Division | Brown algae (Phaeophyta) | |||||||
| Klasse | Brunalgar (Phaeophyceae) | |||||||
| Order | Chordariales | |||||||
| Family | Chordariaceae | |||||||
| Genus | Chordaria | |||||||
| Species | Strandtagl (Chordaria flagelliformis) | |||||||
| Genus | Eudesme | |||||||
| Species | Slimtrevl (Eudesme virescens) | |||||||
| Genus | Mesogloia | |||||||
| Species | Bruntrevl (Mesogloia vermiculata) | |||||||
| Family | Leathesiaceae | |||||||
| Genus | Leathesia | |||||||
| Species | Sea potato (Leathesia marina) | |||||||
| Family | Ralfsiaceae | |||||||
| Genus | Ralfsia | |||||||
| Species | Fjæreskorpe (Ralfsia verrucosa) | |||||||
| Family | Spermatochnaceae | |||||||
| Genus | Spermatochnus | |||||||
| Species | Bleiktuste (Spermatochnus paradoxus) | |||||||
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