HELIASTERIDAE AND THE
publication ID |
https://doi.org/10.1111/j.1096-3642.2010.00688.x |
persistent identifier |
https://treatment.plazi.org/id/03E687F8-FFA0-FFA6-3C3E-2683FDDA58DD |
treatment provided by |
Valdenar (2021-08-31 22:45:11, last updated by Plazi 2023-11-06 12:48:41) |
scientific name |
HELIASTERIDAE AND THE |
status |
|
THE HELIASTERIDAE AND THE View in CoL SYNONYMY OF THE LABIDIASTERIDAE
The monotypic Heliasteridae includes the sole genus Heliaster , which comprises a species complex in the tropical East Pacific from Baja California, west to the Galapagos, and south to Chile (H. L. Clark, 1907).
In our two-gene tree ( Fig. 2 View Figure 2 ) the monotypic Heliasteridae , represented by the Eastern Pacific species Heliaster kubiniji , is supported (100% bootstrap) as the sister taxon to the Southern Ocean/sub-Antarctic Labidiaster . The three-gene tree, which lacks Heliaster , shows Labidiaster as sister taxa to a new genus and species of deep-sea six-rayed pedicellasterid from the Central Pacific (86% bootstrap support), but with much longer branch lengths, suggesting greater divergence between the two taxa. If Labidiaster and Heliaster are sister taxa, this would further suggest a close biogeographic relationship between the South American and Antarctic/sub-Antarctic asteroid faunas. Janosik et al. (2008) have shown pelagic larvae for Labidiaster annulatus present in the Drake Passage, suggesting gene flow between South American and Antarctic populations.
Support for Labidiaster as the sister taxon to Heliaster is consistent with the assertion that the Labidiasteridae (sensu Spencer & Wright, 1966) is a purely artificial grouping (e.g. Mah, 2000; Foltz et al., 2007). Labidiaster is a phylogenetically separate taxon from the other labidiasterids (sensu Clark & Mah, 2001), including Plazaster , Coronaster , and Rathbunaster . Because Labidiaster is the type genus for the Labidiasteridae , this places synonymy of the Labidiasteridae into the Heliasteridae rather than the Asteriidae , as has been implied by earlier studies (e.g. Mah, 2000). The other genera within the Labidiasteridae have emerged with phylogenetically distinct clades: Plazaster and Rathbunaster on separate clades within the boreal Asteriidae , and Coronaster with the pantropical Asteriidae . All members of the polyphyletic Labidiasteridae were characterized by large numbers of elongate arms (up to 50 in Labidiaster ), biserial tube foot rows, and prominent pedicellariae. Based on our phylogenetic trees, these characters may be independently derived adaptations for benthopelagic predation, which has been observed in Labidiaster ( Dearborn, Edwards & Fratt, 1991) and Rathbunaster ( Lauerman, 1998) .
Clark HL. 1907. The starfishes of the genus Heliaster. Bulletin of the Museum of Comparative Zoology 51: 25 - 76.
Clark AM, Mah C. 2001. An index of names of recent Asteroidea - part 4: Forcipulatida and Brisingida. Echinoderm Studies 6: 229 - 347.
Dearborn JH, Edwards KC, Fratt DB. 1991. Diet, feeding behavior, and surface morphology of the multi-armed Antarctic sea star Labidiaster annulatus (Echinodermata: Asteroidea). Marine Ecology Progress Series 77: 65 - 84.
Foltz DW, Bolton MT, Kelley SP, Kelley DB, Nguyen AT. 2007. Combined mitochondrial and nuclear sequences support the monophyly of forcipulatacean sea stars. Molecular Phylogenetics and Evolution 43: 627 - 634.
Janosik AM, Machon AR, Scheltema RS, Halanych KM. 2008. Life history of the Antarctic sea star Labidiaster annulatus (Asteroidea: Labidiasteridae) revealed by DNA barcoding. Antarctic Science 20: 563 - 564.
Lauerman LML. 1998. Diet and feeding behavior of the deep-water sea star Rathbunaster californicus (Fisher) in the Monterey submarine canyon. Bulletin of Marine Science 63: 523 - 530.
Mah C. 2000. Preliminary phylogeny of the forcipulatacean Asteroidea. American Zoologist 40: 375 - 381.
Spencer WK, Wright CW. 1966. Asterozoans. In: Moore RC, ed. Treatise on invertebrate paleontology, Part U, Echinodermata 3, Vol. 1. Lawrence, KS: University of Kansas Press, 4 - 107.
Figure 2. Maximum-likelihood tree for 95 forcipulate taxa and nine velatidan taxa, rooted on 111 taxa belonging to the Valvatida, Paxillosida, and Notomyotida (these taxa have been omitted for clarity), and based on 261 bp of sequence data for the 12S rDNA gene and 437 bp for the 16S rDNA gene. Bootstrap support values are based on 250 pseudoreplicates and are shown as percentages when ± 50%. Named clades correspond either to traditional taxonomic groups or to geographically restricted lineages.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
Family |