Cordylophora
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| Cordylophora | |
 | |
| Systematik | |
|---|---|
| Domän | Eukaryoter Eukaryota |
| Rike | Djur Animalia |
| Stam | Nässeldjur Cnidaria |
| Klass | Hydrozoer Hydrozoa |
| Ordning | Anthoathecata |
| Familj | Oceanidae |
| Släkte | Cordylophora |
| Vetenskapligt namn | |
| § Cordylophora | |
| Auktor | Allman, 1844 |
| Hitta fler artiklar om djur med | |
Cordylophora[1] är ett släkte av nässeldjur som beskrevs av George James Allman 1844. Enligt Catalogue of Life[1] ingår Cordylophora i familjen Oceanidae, men enligt Dyntaxa[2] är tillhörigheten istället familjen Clavidae.
Kladogram enligt Catalogue of Life[1] och Dyntaxa[2]:
| Oceanidae |
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- ^ [a b c] Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.) (31 juli 2011). ”Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist.”. Species 2000: Reading, UK. http://www.catalogueoflife.org/annual-checklist/2011/search/all/key/cordylophora/match/1. Läst 24 september 2012.
- ^ [a b] Dyntaxa Cordylophora
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PSM V16 D659 Fragment of cordylophora lacustris.jpg
Fragment of Cordylophora lacustris Syn. Cordylophora caspia
The Monograph of the Gymnoblastic or Tubularian Hydroids. Plate III.png
Cordylophora lacustris (=Cordylophora caspia; Hydrozoa: Anthoathecatae: Filifera: Oceaniidae).
Cordylophora lacustris (=Cordylophora caspia; Hydrozoa: Anthoathecatae: Filifera: Oceaniidae).
- 1 – portion of a female colony, magnified:
- a – very young gonophore;
- b – gonophore more advanced, containing ova, which are embraced by the branches of a ramified spadix, and have their germinal vesicles distinct;
- c – gonophore still further advanced; the ramifications of the spadix have disappeared, and the segmentation of the vitellus has been completed in the ova;
- d – further stage of development, in which the ova have become planulae, and are ready to escape from the gonophore;
- e – the gonophore has become ruptured at the summit, and the ciliated planulae are escaping into the surrounding water.
- 2 – a colony of Cordylophora lacustris (=Cordylophora caspia), of the natural size, attached to the under surface of a piece of floating timber.
- 3 – a male gonophore, the spermatic mass embraced by the ramifications of the spadix.
- 4 – the distal portion of a male gonophore still more magnified:
- a – external chitinous investment, showing layers of deposition;
- b – ectotheca;
- c – endotheca;
- d – ramified spadix embracing the spermatic mass.
- 5 – planula much magnified, in two different states of contracion. Its interior is occupied by a large cavity, and an ectoderm and endoderm are distinctly visible in its walls.
- 6 – the planula after it has lost its cilia and has become fixed.
- 7 – further stage of development, in which the distinction between stem and hydranth has become apparent, and a vertical of four tentacles has begun to be developed from the hydranth, while the stem has excreted a delicate chitinous perisarc.
- 8 – the young Cordylophora still further developed; the tentacles are still in a single verticil, but have increased in length, and the hypostome has become prominent.
- 9 – mature spermatozoa; in the group to the left heads are still enclosed in the generating cell.
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Cordylophora caspia, portion of a female colony (from Allman, 1872).png
Cordylophora caspia (=Cordylophora lacustris; Hydrozoa: Anthoathecatae: Filifera: Oceaniidae), a portion of a female colony:
Cordylophora caspia (=Cordylophora lacustris; Hydrozoa: Anthoathecatae: Filifera: Oceaniidae), a portion of a female colony:
- a – very young gonophore;
- b – gonophore more advanced, containing ova, which are embraced by the branches of a ramified spadix, and have their germinal vesicles distinct;
- c – gonophore still further advanced; the ramifications of the spadix have disappeared, and the segmentation of the vitellus has been completed in the ova;
- d – further stage of development, in which the ova have become planulae, and are ready to escape from the gonophore;
- e – the gonophore has become ruptured at the summit, and the ciliated planulae are escaping into the surrounding water.