Heliaster
Heliaster is a genus of Asteroidea (sea stars) in the family Heliasteridae.[1]
| Heliaster | |
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| Heliaster microbrachius | |
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| Genus: | Heliaster Gray, 1840 |
Species
- Heliaster canopus Perrier, 1875
- Heliaster cumingi (Gray, 1840)
- Heliaster helianthus (Lamarck, 1816)
- Heliaster kubiniji Xantus, 1860
- Heliaster microbrachius Xantus, 1860
- Heliaster polybrachius H.L. Clark, 1907
- Heliaster solaris A.H. Clark, 1920
Fossil record
Whole specimens of Heliaster microbrachius have been found preserved in calcite-cemented quartz in Southwest Florida that dates to the Pliocene, 3.5 to 2.5 million years ago (Castilla et al. 2013). Today H. microbrachius is found only in the Pacific Ocean: on the coast of Panama, and Acapulco in Mexico. This suggests that greater connection between the two oceans gave the species a more extensive range in the past (Castilla et al. 2013).
gollark: Apparently people think it is and hire CEOs accordingly, although it's possible there isn't really much innovation in company structure which would encourage them not to do that.
gollark: Unless they're the CEO.
gollark: In any case, if whoever was making the decisions at these companies considered it a problem, they could presumably just pay the CEOs less.
gollark: Also (ideally) long-term strategic planning things, which are not yet automated.
gollark: I'm not exactly sure what they do, but plausibly a lot of it is "networking" and such, which is hard to automate.
References
- Castilla, Juan Carlos, Sergio A. Navarrete, Tatiana Manzur, and Mario Barahona. 2013. Heliaster helianthus. Chapter 15, pp. 153–160 in John M. Lawrence, ed. 2013. Starfish. Biology and Ecology of the Asteroidea. Johns Hopkins University Press, Baltimore.
- Gray J.E. (1840). A synopsis of the genera and species of the class Hypostoma (Asterias Linnaeus). Annals of the Magazine of Natural History 6: 175-184; 275-290
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