Isolatocereus

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Isolatocereus

Isolatocereus Backeb. in Cactaceae (Berlin) 1941(2): 47, 76. 1942 sec. Hernández & Gómez-Hinostrosa 20111 wfo-4000019276
      Nametype: Isolatocereus dumortieri (Scheidw.) Backeb.
  • 1. Hernández, H.M. & Gómez-Hinostrosa, C. 2011: Mapping the cacti of Mexico. – Succulent Plant Research 7: 1-128
  • =Lemaireocereus subg. Isolatocereus Backeb. in Blätt. Kakteenf. 1938(6): 17. 1938 syn. sec. Arias 20212 wfo-3500004013
  • 2. Arias, S. 2021: Revisions of Acanthocereus, Aporocactus, Astrophytum, Bergerocactus, Cephalocereus, Disocactus, Marshallocereus, Nyctocereus, Pachycereus, Peniocereus, Pereskiopsis, Selenicereus, Stenocereus, Strophocactus. – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270. 10.3372/wi.51.51208

Notes

Isolatocereus is recognized here as a monotypic genus. It belongs to Echinocereeae, based on molecular evidence (Hernández-Hernández & al. 2011) and because it shares the three characters of the group (tannins in the funicles, seeds with striated microrelief, triterpenes in the stem). It shares with Stenocereus the presence of silica bodies in the stem, however, phylogenetic studies carried out with cpDNA markers reveal that it is closer to Myrtillocactus and Escontria.A,B

Taxon standing

Category B. The genus is monophyletic based on phylogenetic studies that support the clade based on a sufficiently dense or even complete sampling, or support a monotypic genus as a distinct lineage, but do not provide a new taxonomic treatment at the species level. In many cases, older classical taxonomic synopses or a monographic treatment exist for these genera providing a reliable assessment of the species included.

Bibliography

A. Arias, S. 2021: Revisions of Acanthocereus, Aporocactus, Astrophytum, Bergerocactus, Cephalocereus, Disocactus, Marshallocereus, Nyctocereus, Pachycereus, Peniocereus, Pereskiopsis, Selenicereus, Stenocereus, Strophocactus. – In: Korotkova N. & al., Cactaceae at Caryophyllales.org – a dynamic online species-level taxonomic backbone for the family. – Willdenowia 51: 251-270. https://doi.org/10.3372/wi.51.51208
B. Hernández-Hernández, T., Hernández, H.M., De-Nova, J. A., Puente, R., Eguiarte, L.E. & Magallón, S. 2011: Phylogenetic relationships and evolution of growth form in Cactaceae (Caryophyllales, Eudicotyledoneae). – American Journal of Botany 98(1): 44-61. https://doi.org/10.3732/ajb.1000129