Crenaticaulis

Crenaticaulis


Crenaticaulis
Scientific classification e
Kingdom: Plantae
Class: †Zosterophyllopsida
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. lianoveranum, 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

  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 (Botanical Society of America) 56 (4): 436–449. doi:10.2307/2440821. JSTOR 2440821. 
  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. http://www.amjbot.org/cgi/content/full/91/10/1683. Retrieved 2011-01-27. 

External links


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