Polypodiopsida - Equisetales - Equisetidae

Synonym: Nematophyllum Fontaine and White 1880 [replaced name]

Parent taxon: Calamitaceae according to H. N. Andrews 1970

Sister taxa: Arthrodendron, Arthropityostachys, Arthropitys, Asterophyllites, Asterophyllostachys, Asthenomyelon, Calamitea, Calamites, Calamitina, Calamitomyelon, Calamocarpon, Calamocladus, Calamodendrea, Calamodendrofloyos, Calamodendron, Calamodendrophyllum, Calamodendroxylon, Calamophloios, Calamostachys, Coleophyllites, Haplocalamus, Metacalamostachys, Myelocalamites, Neocalamites, Pinnularia, Protocalamites, Pseudobornia, Zimmermannioxylon

Subtaxa: Nematophyllites angustus

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Type: Nematophyllum angustum

Distribution: found only at Dunkard Strata in Northwestern West Virginia and Southwestern Pennsylvania ( of West Virginia)

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Specimen images are retrieved through the ePANDDA API.