Biology:Xenoturbella hollandorum
| Xenoturbella hollandorum | |
|---|---|
| |
| A congeneric species of X. hollandorum (X. japonica) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Xenacoelomorpha |
| Family: | Xenoturbellidae |
| Genus: | Xenoturbella |
| Species: | X. hollandorum
|
| Binomial name | |
| Xenoturbella hollandorum Rouse, Wilson, Carvajal & Vrijenhoek, 2016[1]
| |
Xenoturbella hollandorum is a marine, benthic worm-like species that belongs to the genus Xenoturbella. It was discovered in eastern Pacific Ocean by a group of Californian and Australian scientists.[2][3][4] The species was described in 2016.[1]
X. hollandorum shares morphological similarities with other species of the genus Xenoturbella, and is known for lacking respiratory, circulatory and an excretory system.[5]
Description
The etymology of the species name corresponds to a scientific patronym in honor of Linda and Nicholas Holland.[6]
Xenoturbella hollandorum is 2.5 cm (0.98 in) in length, with a uniform bright pink colouration. The body wall displays several furrows: on the circumference, on the side, and two deep, longitudinal, dorsal ones. The mouth is orientated ventrally, anterior to the ring furrow. The live specimen exhibits an inconspicuous epidermal ventral glandular network.[1]
Phylogeny
Comparison of mitochondrial DNA and protein sequences showed that the species X. hollandorum is the sister group to X. bocki. In turn, these two species share evolutionary affinities with X. japonica into a clade of 'shallow-water' taxa.[1][7]
| Species-level cladogram of the genus Xenoturbella. |
| The cladogram has been reconstructed from mitochondrial DNA and protein sequences.[1][7] |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Rouse, Greg W.; Wilson, Nerida G.; Carvajal, Jose I.; Vrijenhoek, Robert C. (2016-02-04). "New deep-sea species of Xenoturbella and the position of Xenacoelomorpha" (in en). Nature 530 (7588): 94–97. doi:10.1038/nature16545. ISSN 0028-0836. PMID 26842060. Bibcode: 2016Natur.530...94R. http://www.nature.com/articles/nature16545.
- ↑ Khan, Amina (2016-02-05). "Newly discovered deep-sea worms, including one named 'churro,' could shed light on animal evolution" (in en-US). https://www.latimes.com/science/sciencenow/la-sci-sn-churro-sea-worm-bilateria-20160205-story.html.
- ↑ Morelle, Rebecca (2016-02-03). "Mystery of 'sock of the deep' solved" (in en-GB). BBC News. https://www.bbc.com/news/science-environment-35482467.
- ↑ "We finally know what to make of these 'purple sock' creatures that litter the sea floor" (in en-US). 2016-02-05. https://www.zmescience.com/science/biology/purple-sock-creatures-054343/.
- ↑ Nakano, Hiroaki (2015). "What is Xenoturbella?". Zoological Letters 1 (22): 22. doi:10.1186/s40851-015-0018-z. PMID 26605067.
- ↑ "Around the Pier: Churro-Like Marine Worm Discovered by Scripps Scientists Is One of the 'Top 10 Species of 2017'" (in en). 2017-05-30. https://scripps.ucsd.edu/news/around-pier-profunda-marine-worm-discovered-scripps-scientists-one-top-10-species-2017.
- ↑ 7.0 7.1 Nakano, Hiroaki; Miyazawa, Hideyuki; Maeno, Akiteru; Shiroishi, Toshihiko; Kakui, Keiichi; Koyanagi, Ryo; Kanda, Miyuki; Satoh, Noriyuki et al. (2017-12-18). "A new species of Xenoturbella from the western Pacific Ocean and the evolution of Xenoturbella" (in en). BMC Evolutionary Biology 17 (1): 245. doi:10.1186/s12862-017-1080-2. ISSN 1471-2148. PMID 29249199.
Wikidata ☰ Q22667790 entry
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