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Issue: Vol. 4457 No. 1: 7 Aug. 2018
Type: Article
Published: 2018-08-07
DOI: 10.11646/zootaxa.4457.1.3
Page range: 70–92
Abstract views: 238
PDF downloaded: 3

Synchrotron micro-CT scanning leads to the discovery of a new genus of morphologically conserved echinoid (Echinodermata: Cassiduloida)

University of California Museum of Paleontology and Department of Integrative Biology, 1101 Valley Life Science Building, University of California, Berkeley–CA, U.S.A., 94720 Department of Invertebrate Zoology and Geology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco–CA, U.S.A., 94118
Museu de Zoologia, Universidade de São Paulo, Caixa Postal 42494, São Paulo–SP, Brazil, 04218–970
Echinoidea Neognathostomata 3D imaging new species taxonomy neotype Indo-Pacific Echinodermata

Abstract

Here we use synchrotron radiation-based micro-computed tomography (SRµCT) images of type specimens to confidently place Cassidulus malayanus in a new genus (Kassandrina gen. nov.) that would not have been discovered with traditional techniques, and to describe a new species of Cassidulus (Cassidulus briareus sp. nov.) from Australia and designate a neotype for Cassidulus caribaearum. We also provide remarks describing the taxonomic history of each taxon and a diagnostic table of all living cassidulid species, and extend the known geographic and bathymetric range of C. caribaearum and C. malayanus. Besides rendering novel morphological data, the SRµCT images provide significant insights in the evolution of bourrelets of these cassiduloid echinoids.

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