The order Halichondrida has been erected to separate demosponges that possess a confused skeletal arrangement, a simple spicule complement of oxea, and/or styles and a differentiated ectosomal...
CITATION STYLE
Diaz, M. C., van Soest, R. W. M., & Pomponi, S. A. (1991). A Systematic Revision of the Central-Atlantic Halichondrida (Demospongiae, Porifera). Part I: Evaluation of Characters and Diagnosis of Genera. In Fossil and Recent Sponges (pp. 134–149). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-75656-6_11
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