|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Asteroidea - Valvatida - Goniasteridae
It was assigned to Goniasterinae by Spencer and Wright (1966); to Valvatida by Sepkoski (2002); and to Goniasteridae by Sladen (1893), Breton (1992) and Breton and Néraudeau (2008).
|Year||Name and author|
|1914||Spenceria Fourtau p. 99|
|1966||Metopaster Spencer and Wright p. U57|
|1966||Spenceria Spencer and Wright p. U57|
|1992||Metopaster Breton p. 105|
|2002||Metopaster Sepkoski, Jr.|
|2002||Spenceria Sepkoski, Jr.|
|2008||Metopaster Breton and Néraudeau p. 329|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|G. Breton 1992||Body pentagonal, depressed, with sides concave, straight or slightly convex. Few, large marginal plates: 4 to 12 superomarginals per side. Enlarged ultimate or penultimate superomarginal plates at the arm tip, correponding to 1 to 11 inferomarginal plates. Width of the inferomarginal regularly decreases from interradius to the arm tip. External face with a raised central area and a depressed margin differentiated. Central area smooth or with an ornament of large, rounded, well demarcated granule-pits. Depressed margin with one or several rows of tiny, dense, adjoining granule-pits. Pedicellariae-pits oval, winged. 4 to 8 furow spines per adambulacral plate.|