ammonites
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†family Metagnostidae Jaekel 1909 (trilobite)

Trilobita - Agnostida

PaleoDB taxon number: 133736

Synonyms: Arthrorhachidae Raymond 1913 (no. 363852), Geragnostidae Howell 1935 (no. 103498), Geragnostinae Howell 1935 (no. 198454), Trinodidae Howell 1935 (no. 363851)

Parent taxon: Agnostida according to H. B. Whittington et al. 1997

Sister taxa: Agnostidae, Agnostina, Agnostogonus, Agnostoidea, Aistagnostus, Allobodochus, Ammagnostidae, Aotagnostus, Armagnostus, Blystagnostus, Calodiscidae, Ceragnostus, Chatkalagnostus, Chelediscus, Clavagnostidae, Condylopygidae, Cristagnostus, Delagnostus, Dicerodiscus, Dignagnostus, Dipharus, Dividuagnostus, Dolichoagnostus, Egyngolia, Eodiscidae, Eodiscina, Euagnostus, Formagnostus, Glaberagnostus, Glyptagnostidae, Grandagnostus, Granuloagnostus, Gratagnostus, Hastagnostus, Hebediscidae, Hebediscina, Itagnostus, Jinghediscus, Kiskinella, Kymagnostus, Lavsanodiscus, Lenadiscus, Litometopus, Megagnostus, Meniscuchus, Micagnostus, Miraculaspis, Monexagnostus, Ninadiscus, Oodiscus, Parapagetia, Peronopsidae, Phalacromidae, Phoidagnostus, Pleurinodus, Pseudocobboldia, Ptychagnostidae, Rhodotypiscus, Semadiscus, Skryjagnostus, Sphaeragnostidae, Spinagnostidae, Stigmadiscus, Tasagnostus, Tchernyshevioides, Triangulina, Tsunyidiscidae, Valenagnostus, Weymouthiidae, Xyoeax, Yukonia, Yukonides, Yukoniidae

Subtaxa: Anglagnostus, Arthrorhachis, Corrugatagnostus, Galbagnostus, Geragnostella, Geragnostus, Homagnostoides, Quadragnostus, Trinodus

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Ecology: slow-moving epifaunal detritivore