Barentsia ramosa
| Barentsia ramosa | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Entoprocta |
| Family: | Barentsiidae |
| Genus: | Barentsia |
| Species: | B. ramosa
|
| Binomial name | |
| Barentsia ramosa Robertson, 1900[1]
| |
| Synonyms | |
|
Gonypodaria ramosa Robertson, 1900 | |
Barentsia ramosa is a species of entoproct found throughout the North Atlantic and Pacific oceans. They are colonial organisms found in depths of up to 70 m[2] that primarily feed on phytoplankton filtered out of the water.
Their central calyx holds both the mouth and anus, as well as the gonads, and, in the females, the brood chamber. They reproduce sexually, with reproductive maturity peaking in the colony in the winter. The males develop faster than the females.[3]
Physical description
Barentsia ramosa zooids range from 3 to 30 mm tall, with 1–10 branches off off the base stalk, each terminating in a calyx ringed by 16–22 cilia, or tentacles.[4] These zooids are interconnected at the base through a network of horizontal stolons, forming small colonies anchored to bare rock or to other animals.[2]
References
- ^ Robertson, Alice (1900). "Studies in Pacific Coast Entoprocta". Proceedings of the California Academy of Sciences, Zoology. 3. 2 (4): 323–348 [337].
- ^ a b Wasson, Kerstin; Mariscal, Richard M. (2007-07-27). "Kamptozoa (Entoprocta)". In Carlton, James T. (ed.). The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon (4th ed.). University of California Press. pp. 286–287. doi:10.1525/9780520930438-027. ISBN 978-0520239395. JSTOR jj.5973107.
- ^ Wasson, Kerstin (1998). "Sexual reproduction in the colonial kamptozoan Barentsia hildegardae". Invertebrate Biology. 117 (2): 123–128 [124]. doi:10.2307/3226964. JSTOR 3226964 – via JSTOR.
- ^ Wasson, Kerstin (February 1997). "Systematic revision of colonial kamptzoans (entoprocts) of the Pacific coast of North America". Zoological Journal of the Linnean Society. 121 (1): 1–63 [6–7]. doi:10.1111/j.1096-3642.1997.tb00146.x.