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Asteroidea source details
Mah, C.L. (2006). Phylogenetic analysis and biogeography of the deep-sea goniasterid, Circeaster (Echinodermata: Asteroidea) including descriptions of six new species. Zoosystema. 28(4): 917-954.
43957
Mah, C. L.
2006
Phylogenetic analysis and biogeography of the deep-sea goniasterid, <i>Circeaster</i> (Echinodermata: Asteroidea) including descriptions of six new species
Zoosystema
28(4): 917-954
Publication
A phylogenetic analysis of 13 taxa and 33 characters resulted in a single most parsimonious tree that supports monophyly of the goniasterid (Echinodermata, Asteroidea) genus Circeaster Koehler, 1909 and supports re-establishment of the genus Lydiaster Koehler, 1909. The phylogeny supports monophyly of the ingroup, including 10 species, six of which, C. kristinae n. sp., C. helenae n. sp., C. arandae n. sp., C. loisetteae n. sp., C. sandrae n. sp., and C. pullus n. sp., are new. Phylogenetic results support diversification into the Indian, Pacific, and Atlantic ocean basins. The phylogeny is constrained by a sister taxon with a Cretaceous fossil occurrence and two geologic events, including the closure of the Indonesian seaway and formation of the Panamanian isthmus. These events formed barriers limiting or preventing larval dispersal between the Indian/Pacific and the Pacific/Atlantic oceans. Larval dispersal through a deep-sea environment was a significant consideration for estimating timing constraints from paleoenvironments. Based on fossil constraints, ancestry for the lineage is suggested as early as the Late Cretaceous with subsequent diversification in the Cenozoic. In situ observations of Circeaster perched on bare deep-sea coral skeletons and morphological similarities with other known corallivorous goniasterids suggest important ecological roles in the deep-sea.
Indian Ocean
Tropical Pacific Tropical West Atlantic West Australia
Abyssal, Deep-Sea
Bathyal, Continental slope Bathymetric distribution, bathymetric zonation
Circeaster Koehler, 1909 (additional source)
Circeaster americanus (A.H. Clark, 1916) (additional source) Circeaster arandae Mah, 2006 accepted as Atheraster arandae (Mah, 2006) (original description) Circeaster helenae Mah, 2006 (original description) Circeaster kristinae Mah, 2006 (original description) Circeaster loisetteae Mah, 2006 (original description) Circeaster pullus Mah, 2006 (original description) Circeaster sandrae Mah, 2006 (original description) Goniasteridae Forbes, 1841 (additional source) Lydiaster Koehler, 1909 (basis of record) Lydiaster johannae Koehler, 1909 (additional source)
Caribbean Sea for Circeaster americanus (A.H. Clark, 1916)
Florida for Circeaster americanus (A.H. Clark, 1916) Hawaiian Islands for Circeaster pullus Mah, 2006 Indian Ocean for Circeaster magdalenae Koehler, 1909 Madagascar for Circeaster arandae Mah, 2006 Madagascar for Circeaster magdalenae Koehler, 1909 Madagascar for Lydiaster Koehler, 1909 Marquesas Islands for Circeaster sandrae Mah, 2006 Mexico for Circeaster americanus (A.H. Clark, 1916) New Caledonian Exclusive Economic Zone for Circeaster arandae Mah, 2006 New Caledonian Exclusive Economic Zone for Circeaster pullus Mah, 2006 New Caledonian Exclusive Economic Zone for Circeaster sandrae Mah, 2006 Nicaraguan part of the Caribbean Sea for Circeaster americanus (A.H. Clark, 1916) Solomon Islands Exclusive Economic Zone for Circeaster loisetteae Mah, 2006 Venezuelan part of the Caribbean Sea for Circeaster americanus (A.H. Clark, 1916) Western Australia (state) for Circeaster helenae Mah, 2006 Western Australia (state) for Circeaster loisetteae Mah, 2006 |