title: Using scalarane sesterterpenes to examine a sponge taxonomic anomaly.
abstract: A parallel study was conducted on two Indo-Pacific foliose sponges. The first specimen contains 3-hydroxy-20,22-dimethyl-20-deoxoscalarin (2), while the second contains 3-oxo-20,22-dimethyl-20-dioxoscalarin 8 (3). The physical properties as well as X-ray results confirming the structure and stereochemical features of these compounds are presented first. The difficulty we encountered in the taxonomic identification of these species is also discussed. One of our specimens is identical to material considered by different taxonomists as either Phyllospongia vermicularis or Dysidea vermicularis. The other is identified as Carteriospongia sp. We outline that the parallel chemistry of these two specimens suggests that they are closely related taxonomically.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Santa Cruz 95064, USA.
authors.forename: M
authors.initials: M
authors.lastname: Jaspars
authors.forename: E
authors.initials: E
authors.lastname: Jackson
authors.forename: E
authors.initials: E
authors.lastname: Lobkovsky
authors.forename: J
authors.initials: J
authors.lastname: Clardy
authors.forename: M C
authors.initials: MC
authors.lastname: Diaz
authors.forename: P
authors.initials: P
authors.lastname: Crews
mesh_terms: D000818:Animals; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D011161:Porifera / Q000737:chemistry* / Q000145:classification*; D013729:Terpenes / Q000737:chemistry*
chemical_list: D013729:Terpenes