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Mah, C. (2007). Phylogeny of the Zoroasteridae (Zorocallina;Forcipulatida): evolutionary events in deep-sea Asteroidea displaying Palaeozoic features. Zoological Journal of the Linnean Society 150: 177-210.
10.1111/j.1096-3642.2007.00291.x [view]
Mah, C.
Phylogeny of the Zoroasteridae (Zorocallina;Forcipulatida): evolutionary events in deep-sea Asteroidea displaying Palaeozoic features
Zoological Journal of the Linnean Society
150: 177-210
The Zoroasteridae comprise a small but widespread family of asteroids distributed throughout the deep-sea. Although poorly understood, they are often collected in the hundreds, suggesting that they occupy important ecological roles. A phylogenetic analysis including 24 terminal taxa and 70 morphological characters was performed, resulting in a single most-parsimonious tree. The tree separated zoroasterids with open, reticulate skeletons (e.g., Myxoderma) as more basal than those with more heavily armored, imbricate skeletons (e.g., Zoroaster) which were more derived. In addition to agreement with established genera, a new genus is supported by the phylogeny as the sister taxon to Myxoderma. The cladistic analysis was performed in conjunction with a revisionary survey of zoroasterid species, resulting in in taxonomic changes to species in nearly every genus. Bathymetric and physiographic shifts were observed between the reticulate and imbricate zoroasterid clades. Zoroasterids possess a single marginal plate series, which occurs in basal sister-group neoasteroids (crown group asteroids). Phylogenetic results suggest that the morphololgical resemblance between zoroasterids and Paleozoic taxa, such as Calliasterella is convergent but a paraphyletic Zoroasteride can not be rejected and remains consistent with basal crown-group affinities. Although the phylogenetic position of the Eocene Zoroaster aff. fulgens was not strongly supported, its presence within a derived cluster of Zoroaster spp. suggests a relatively recent (ie Cenozoic) diversification into the deep-sea. Taxonomic revisions, geographic, and bathymetric range extensions are also included.
Abyssal, Deep-Sea
Bathymetric distribution, bathymetric zonation
Paleontology, Fossils, Paleobiology
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2013-01-12 18:30:12Z
2013-09-17 09:10:59Z

Aleutian Islands for Zoroaster actinocles Fisher, 1919 
Andaman Sea for Cnemidaster gilesi (Alcock, 1893) 
Baja California for Cnemidaster nudus (Ludwig, 1905) 
Baja California for Myxoderma platyacanthum (H.L. Clark, 1913) 
Baja California for Zoroaster ophiurus Fisher, 1905 
Bay of Bengal for Zoroaster barathri Alcock, 1893 
California for Myxoderma platyacanthum (H.L. Clark, 1913) 
California for Zoroaster actinocles Fisher, 1919 
California for Zoroaster ophiurus Fisher, 1905 
Chile for Cnemidaster nudus (Ludwig, 1905) 
Chile for Zoroaster actinocles Fisher, 1919 
Farallon Islands for Cnemidaster nudus (Ludwig, 1905) 
Gulf of Alaska for Zoroaster actinocles Fisher, 1919 
Kenyan Exclusive Economic Zone for Zoroaster adami Koehler, 1909 
Oregon for Myxoderma platyacanthum (H.L. Clark, 1913) 
Peruvian Exclusive Economic Zone for Zoroaster ophiurus Fisher, 1905 
Phuket for Zoroaster adami Koehler, 1909 
Queen Charlotte Island for Myxoderma platyacanthum (H.L. Clark, 1913) 
Zanzibar for Zoroaster adami Koehler, 1909 
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