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The genus Chondria is well represented on the coast of southern Australia where 17 species occur. Of the 12 species previously recognised, three are transferred to other genera and two placed into synonymy with other species of Chondria. A further seven species are described as new (C. angustissima, C. capreolis, C. hieroglyphics, C. incurva, C. myriopoda, C. semzsecunda and C. suprabulbosa), one species is raised from subspecific status, one transferred from Coeloclonium and one species from California is described as a new record for southern Australia. Most southern Australian species of Chondria appear to be clearly defined; however, a few intergrades between C. curdieana and C. capreolis occur. Previous confusion in the identification of species was mainly due to the lack of detailed investigation of morphology together with insufficient understanding of important characters and the degree of variation. Only seven of the southern Australian species of Chondria have a wide distribution, one western, one central and eight with primarily eastern distributions. Of the last, two species extend into warm temperate and subtropical waters. Six species are found mainly in deep water (more than 10 m deep) while another six range from shallow to medium depths (less than 10 m deep). The remainder occur in the exclusively shallow water environments of the lower eulittoral to upper sublittoral zones.

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Both solid state (CP-MAS) and gel state (using standard solution state conditions) 13 C NMR spectroscopy have been used to characterize a range of red algae that produce either agar or carrageenan . These techniques allow rapid determination of phycocolloid type within the algal tissue before extensive and time-consuming extractions and fractionations are carried out .The gel state technique can be used on living or dried material . Gel state spectra give high resolution and, because of the expectation that they will be correlated with the extractable phycocolloid, provide promise of a powerful technique for screening potentially useful red algae .