Chaloneriaceae

Chaloneriaceae; Temporal range: Pennsylvanian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Lycophytes
Class:	Lycopodiopsida
Order:	Isoetales
Family:	†Chaloneriaceae; Pigg & Rothwell (1989)
Genera
	†Bodeodendron; †Chaloneria; †Polysporia; †Sporangiostrobus;

Chaloneriaceae is an extinct family of heterosporous lycophyte in the order Isoetales. They are significant in that they feature lobed rooting bases despite dating to the Pennsylvanian, suggesting that lycophytes with similar rooting systems developed contemporaneously with arborescent lepidodendrids which have stigmarian rooting systems rather than deriving from them as had previously been thought. ^[1]

References

^ Pigg, Kathleen B.; Rothwell, Gar W. (1983). "Megagametophyte Development in the Chaloneriaceae Fam. Nov., Permineralized Paleozoic Isoetales (Lycopsida)". Botanical Gazette. 144 (2): 295–302. doi:10.1086/337376. ISSN 0006-8071. JSTOR 2474656.

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[1] Pigg, Kathleen B.; Rothwell, Gar W. (1983). "Megagametophyte Development in the Chaloneriaceae Fam. Nov., Permineralized Paleozoic Isoetales (Lycopsida)". Botanical Gazette. 144 (2): 295–302. doi:10.1086/337376. ISSN 0006-8071. JSTOR 2474656.

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