Polygnathidae

Polygnathidae
	10–11. Polygnathus sp.; (see caption) 10–14. Conodonts from the basal 20 cm of the Loyalhanna Limestone Member of the Mauch Chunk Formation, Keystone quarry, Pa. (93RS–79a), and Westernport, Md. (93RS–67). Note the highly abraded and reworked aeolian forms.; 10. Polygnathus sp., Pa element, upper view, reworked Late Devonian to Early Mississippian morphotype, 93RS–79a, X140.; 11. Polygnathus sp., Pa element, upper view, reworked Late Devonian to Early Mississippian morphotype, 93RS–67, X140.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Infraphylum:	Agnatha
Class:	†Conodonta
Order:	†Ozarkodinida
Superfamily:	†Polygnathacea
Family:	†Polygnathidae; Bassler, 1925
Genera
	†Avignathus; †Bispathodus; †Ctenopolygnathus; †Mehlina; †Nicollidina; †Pandorinellina; †Parapolygnathus; †Polygnathus Hinde, 1879 (type); †Streptognathodus; †Synclydagnathus;

Polygnathidae is an extinct family of conodonts.

Infraphylum:Agnatha

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Polygnathidae

10–11. Polygnathus sp. (see caption) 10–14. Conodonts from the basal 20 cm of the Loyalhanna Limestone Member of the Mauch Chunk Formation, Keystone quarry, Pa. (93RS–79a), and Westernport, Md. (93RS–67). Note the highly abraded and reworked aeolian forms. 10. Polygnathus sp., Pa element, upper view, reworked Late Devonian to Early Mississippian morphotype, 93RS–79a, X140. 11. Polygnathus sp., Pa element, upper view, reworked Late Devonian to Early Mississippian morphotype, 93RS–67, X140.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Infraphylum:	Agnatha
Class:	†Conodonta
Order:	†Ozarkodinida
Superfamily:	†Polygnathacea
Family:	†Polygnathidae Bassler, 1925^[1]
Genera
†Avignathus †Bispathodus †Ctenopolygnathus †Mehlina †Nicollidina †Pandorinellina †Parapolygnathus †Polygnathus Hinde, 1879 (type) †Streptognathodus †Synclydagnathus