Crenaticaulis

Crenaticaulis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Lycophytes
Plesion:	†Zosterophylls
Genus:	†Crenaticaulis; H.P.Banks
Species
	See text.

Crenaticaulis was an early genus of slender, dichotomously branching, leafless land plants, known from the Devonian period and first described in 1969. They were probably allied to the zosterophylls, and are assigned to subdivision Zosterophyllophytina,^[1] or class Zosterophyllopsida. They bore branches and scalariform tracheids.

A cladogram published in 2004 by Crane et al. places Crenaticaulis in the core of a paraphyletic stem group of broadly defined "zosterophylls", basal to the lycopsids (living and extinct clubmosses and relatives).^[2]

lycophytes

† Hicklingia

†basal groups

Adoketophyton, Discalis, Distichophytum (=Rebuchia), Gumuia, Huia, Zosterophyllum myretonianum, Z. llanoveranum, Z. fertile

†'core' zosterophylls

Zosterophyllum divaricatum, Tarella, Oricilla, Gosslingia, Hsua, Thrinkophyton, Protobarinophyton, Barinophyton obscurum, B. citrulliforme, Sawdonia, Deheubarthia, Konioria, Anisophyton, Serrulacaulis, Crenaticaulis

†basal groups	Nothia, Zosterophyllum deciduum

lycopsids	extant and extinct members

References

^ Banks, H.P.; Davis, M.R. (1969). "Crenaticaulis, a New Genus of Devonian Plants Allied to Zosterophyllum, and Its Bearing on the Classification of Early Land Plants". American Journal of Botany. 56 (4). Botanical Society of America: 436–449. doi:10.2307/2440821. JSTOR 2440821.
^ Crane, P.R.; Herendeen, P.; Friis, E.M. (2004). "Fossils and plant phylogeny". American Journal of Botany. 91 (10): 1683–99. doi:10.3732/ajb.91.10.1683. PMID 21652317. Retrieved 2011-01-27. {{cite journal}}: Invalid |ref=harv (help)

External links

Cladogram from Crane, Herendeen & Friis 2004

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[Banks1969-1] Banks, H.P.; Davis, M.R. (1969). "Crenaticaulis, a New Genus of Devonian Plants Allied to Zosterophyllum, and Its Bearing on the Classification of Early Land Plants". American Journal of Botany. 56 (4). Botanical Society of America: 436–449. doi:10.2307/2440821. JSTOR 2440821.

[Crane_2004-2] Crane, P.R.; Herendeen, P.; Friis, E.M. (2004). "Fossils and plant phylogeny". American Journal of Botany. 91 (10): 1683–99. doi:10.3732/ajb.91.10.1683. PMID 21652317. Retrieved 2011-01-27. {{cite journal}}: Invalid |ref=harv (help)

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