Parent taxon: Arthrodira according to R. Denison 1978
See also Hay 1902, Jordan and Hanibal 1923 and Sepkoski 2002
Sister taxa: Acanthaspida, Actinolepina, Africanaspis, Antarctolepis, Arctolepidae, Arctonema, Arenipiscis, Aspidichthys, Atlantidosteus, Brachydeirina, Brachythoraci, Bruntonichthys, Bullerichthys, Bungartiidae, Burrinijucosteus, Callognathus, Camuropiscidae, Coccosteina, Copanognathus, Cravenaspis, Diplognathus, Erikaspis, Errolosteus, Eskimaspis, Euarthrodira, Eubrachythoraci, Glyptaspis, Goodradigbeeon, Grazosteus, Groenlandaspididae, Harrytoombsia, Heintzosteus, Heterostiina, Hollardosteus, Holonematina, Incisoscutoidea, Kendrickichthys, Kimberleyichthys, Kueichowlepis, Latocamurus, Laurentaspis, Lurapullaspis, Machaerognathus, Mcnamaraspis, Murmur, Mylostomatidae, Operchallosteus, Overtonaspis, Pachyosteidae, Pachyosteina, Parawilliamsaspis, Phlyctaenina, Phylctaeniida, Platyaspis, Prescottaspis, Qataraspis, Rhachiosteidae, Rolfosteus, Selenosteidae, Squamatognathus, Stegophthalami, Taemasosteus, Taunaspis, Temnothoraci, Timanosteus, Titanichthyidae, Toombalepis, Toombsosteus, Torosteus, Trachosteus, Tubonasus, Wheathillaspis, Wuttagoonaspina, Yinosteus, Brachythoracoidei, Actinolepidoidei, Phyllolepidoidei, Phlyctaenioidei
Subtaxa: Cosmacanthus bullatus Cosmacanthus carinatus Cosmacanthus malcolmsoni Cosmacanthus marginalis Cosmacanthus priscus Cosmacanthus stellatus
Ecology: nektonic carnivore
Distribution: found only at Armagh, Ireland (BMNH) (Carboniferous of the United Kingdom)
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.