Wirenia argentea

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Wirenia argentea
Wirenia argentea.jpg
Two adult individuals of Wirenia argentea
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Solenogastres
Order: Pholidoskepia
Family: Gymnomeniidae
Genus: Wirenia
Species:
W. argentea
Binomial name
Wirenia argentea
Odhner, 1921 [1]
Synonyms [2]

Aesthoherpia glandulosa Salvini-Plawen, 1985 [3]

Wirenia argentea is a species of marine mollusc of solenogastres in the family Gymnomeniidae. [2]

Contents

Distribution

Wirenia argentea lives in European marine waters. [2] The type locality of is Hardangerfjord, Sunde, Norway. [2] The type specimen are stored in the Swedish Museum of Natural History. [2]

Ecology

Wirenia argentea is a marine [2] species as all other solenogastres. Wirenia argentea lives in depth range of 95–700 m. [2]

Wirenia argentea is a carnivore [4] and it eats Cnidaria. [4]

Ontogeny

Solenogastres develop via a trochophore-like lecitotrophic larva with a preoral apical cap that at least partly represents an enlarged prototrochal area. [5]

Wirenia argentea deposit small batches of uncleaved embryos that are tightly enclosed by a smooth and transparent egg hull. [5] Cleavage is spiral and unequal. The ciliated larvae hatch about 45 hours after deposition and swim actively in the water column. Within 48–60 hours after hatching they become mushroom-shaped with a pronounced apical cap partly enclosing a posterior trunk. The cells covering the apical cap are large and cleavage arrested. On the apical cap there is a prominent prototrochal band of compound cilia and an apical ciliary tuft and the trunk bears a terminal ciliary band (telotroch). Obscured by the apical cap, a ciliary band originates in the stomodaeal pore and surrounds the trunk. As development is proceeding, the trunk elongates and becomes covered by cuticle with the exception of a ventral ciliary band, the future foot. The larvae have a pair of protonephridia. At 5 days after hatching they begin to settle and within the following 7–9 days the apical cap is gradually reduced. Scattered epidermal sclerites form under the cuticle. Wirenia argentea lack iterated groups of sclerites at any developmental stage. At 40 days after hatching, the postlarvae have a fully developed foregut, but the midgut and hindgut are not yet interconnected. [5]

Genetics

18S ribosomal RNA gene of Wirenia argentea has been analyzed in 2010 and it contains 2161 bp with strong secondary structures and with 63.12% of guanine-cytosine clamps. [6]

Related Research Articles

Aplacophora Class of molluscs

Aplacophora is a presumably paraphyletic taxon. This is a class of small, deep-water, exclusively benthic, marine molluscs found in all oceans of the world.

Solenogastres Class of molluscs

The Solenogastres, common name the solenogasters, are one class of small, worm-like, shell-less molluscs (Aplacophora), the other class being the Caudofoveata (Chaetodermomorpha).

Cavibelonia Order of molluscs

The Cavibelonia are one of the four orders of solenogaster, a kind of shell-less, worm-like mollusk.

Macellomenia is a genus of solenogaster, and the only genus in its family.

Drepanomeniidae is a family of solenogaster,, a kind of shell-less, worm-like, marine mollusk.

Tegulaherpia is a genus of pholidoskepian solenogasters, shell-less, worm-like, marine mollusks. Its sclerites are flattened and resemble the sclerites of Halkieria.

Wirenia is a genus of pholidoskepian solenogasters, shell-less, worm-like, marine mollusks.

Anamenia is a genus of cavibelonian solenogaster, a kind of shell-less, worm-like mollusk.

Simrothiella is a genus of solenogasters, shell-less, worm-like, marine mollusks.

Spiomenia is a genus of solenogaster, shell-less, worm-like, marine mollusks.

Kruppomenia is a genus of solenogaster, a kind of shell-less, worm-like, marine mollusk.

Biserramenia is a genus of solenogaster, a kind of shell-less, worm-like mollusk.

<i>Rhopalomenia</i> Genus of molluscs

Rhopalomenia is a genus of solenogasters, shell-less, worm-like, marine mollusks.

Entonomenia is a genus of cavibelonian solenogasters, shell-less, worm-like mollusks.

<i>Epimenia</i> Genus of molluscs

Epimenia is a genus of cavibelonian solenogasters, a kind of shell-less, worm-like mollusks.

<i>Amboherpia</i> Genus of molluscs

Amboherpia is a genus of solenogaster, a kind of shell-less, worm-like mollusk.

Amphimenia is a genus of cavibelonian solenogaster, a kind of shell-less, worm-like mollusk.

Alexandromenia is a genus of solenogaster, a kind of shell-less, worm-like mollusk.

Dorymenia is a genus of solenogasters, a kind of shell-less, worm-like mollusk.

Strophomeniidae is a family of solenogaster, a kind of shell-less, worm-like, marine mollusk.

References

This article incorporates CC-BY-2.0 text from the reference. [5]

  1. Odhner N. H. (1921). "Norwegian Solenogastres". Bergens Museum Aarbok (1918-1919)1(3): 1-86, pl. 1-6.
  2. 1 2 3 4 5 6 7 Garcia-Alvarez O. & Gofas S. (2009). Wirenia argentea Odhner, 1921. In: Bouchet P., Gofas S. & Rosenberg G. World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=140055 on 2010-03-24.
  3. Salvini-Plawen L. von (1985). "New interstitial Solenogastres". Stygologia 1(1): 101-108.
  4. 1 2 Todt C. & Salvini-Plawen R. L. von (May 2004). "Ultrastructure and histochemistry of the foregut in Wirenia argentea and Genitoconia rosea (Mollusca, Solenogastres)". Zoomorphology 123(2): 65-80. doi : 10.1007/s00435-003-0089-9.
  5. 1 2 3 4 Todt C. & Wanninger A. (2010). "Of tests, trochs, shells, and spicules: Development of the basal mollusk Wirenia argentea (Solenogastres) and its bearing on the evolution of trochozoan larval key features". Frontiers in Zoology 7: 6. doi : 10.1186/1742-9994-7-6.
  6. Meyer A., Todt C., Mikkelsen N. T. & Lieb B. (2010). "Fast evolving 18S rRNA sequences from Solenogastres (Mollusca) resist standard PCR amplification and give new insights into mollusk substitution rate heterogeneity". BMC Evolutionary Biology 10: 70. doi : 10.1186/1471-2148-10-70

Further reading