Xenoturbella churro
| Xenoturbella churro | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Xenoturbella churro | ||||||||||||
| Rouse et al., 2016 |
Xenoturbella churro is a species of the genus Xenoturbella , which was described in 2016 together with three other species of the genus. The animals represent a group of worm-like multicellular animals and are combined with the Acoelomorpha to form the Xenacoelomorpha .
features
Xenoturbella churro corresponds in its characteristics to the other known species of the genus and reaches a body length of about 10 centimeters. The animals are single-colored pink to purple, and the back is characterized by four deep furrows along the axis of the body. In addition, an annular furrow and a side furrow were discovered. The body is rounded off in front of the annular furrow, and it tapers significantly towards the end of the body. The mouth opening is oval in the relaxed state, it lies on the underside approximately in the middle between the front end and the annular groove. The epidermal network takes up about two thirds of the abdomen. The body wall contains gametes on both the back and the abdomen .
In the tissue of the holotype, in addition to the DNA of the species, that of the clam Calyptogena pacifica , which belongs to the Vesicomyidae, was identified.
Locations and way of life
 
| |
Locality of Xenoturbella churro
|
The species has been described using a female specimen from the Guaymas fault in the Gulf of California , Mexico , at a depth of 1,722 meters. The animal was only about 30 centimeters away from the Mexican paratype of Xenoturbella monstrosa and was sucked from the sea floor together with this and other benthic organisms with the help of a Remotely Operated Vehicle (ROV).
No information is available on the animals' way of life.
Systematics
|
Phylogenetic system of the genus Xenoturbella according to Rouse et al. 2016
|
Xenoturbella churro was 2016 as a separate species, together with three other species of the genus by a working group under the direction of Greg W. Rouse scientifically described . Due to the clear similarity to the species of the genus Xenoturbella already described , it was also placed in this genus together with the other new species.
The relationship of the previously known species was investigated on the basis of a molecular-biological DNA analysis, according to which X. churro, together with X. profunda and X. monstrosa, forms a common taxon of deep-sea species that are opposed to the shallow water species X. bocki and X. hollandorum .
The addition of the name churro is derived from a pastry popular in Latin America and on the Iberian Peninsula , the churro . The first writers felt reminded of them by the shape of the animals.
supporting documents
- ↑ a b c d e f g h Greg W. Rouse, Nerida G. Wilson, Jose I. Carvajal, Robert C. Vrijenhoek: New deep-sea species of Xenoturbella and the position of Xenacoelomorpha. Nature 530, Feb. 4, 2016; Pp. 94-97 doi : 10.1038 / nature16545
- ^ Johanna Taylor Cannon, Bruno Cossermelli Vellutini, Julian Smith, Fredrik Ronquist, Ulf Jondelius, Andreas Hejnol: Xenacoelomorpha is the sister group to Nephrozoa. Nature 530, Feb. 4, 2016; Pp. 89-93 doi : 10.1038 / nature16520
literature
- Greg W. Rouse, Nerida G. Wilson, Jose I. Carvajal, Robert C. Vrijenhoek: New deep-sea species of Xenoturbella and the position of Xenacoelomorpha. Nature 530, Feb. 4, 2016; Pp. 94-97 doi : 10.1038 / nature16545