Growth and reproduction of Pycnogonum litorale (Pycnogonida) under laboratory conditions

Tomaschko, Karl-Heinz; Wilhelm, Eva; Bückmann, Detlef

doi:10.1007/s002270050201

Cited by 42 publications

(47 citation statements)

References 7 publications

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“…Bastida et al (1997) reported, from another intertidal location in Buenos Aires, that A. petiolatus was the most common pycnogonid on Bougainvillia muscus colonies, and encysted larvae of this species were only found associated with Bougainvillidae colonies (see Table 1). These observations suggest that species-specific associations between pycnogonids and hydroids may occur, supporting the observations of other authors (Staples and Watson, 1987;Tomaschko et al, 1997;Wilhelm et al, 1997).…”

Section: Discussionsupporting

confidence: 91%

“…Usually, after leaving the male´s ovigerous legs, the protonymphon undergoes a series of moults during which it adds appendages until the adult number of appendages has been reached (Marcus, 1940;Tomaschko et al, 1997;Wilhelm et al, 1997). Anthomedusae:…”

Section: Endo-parasitic Larvaementioning

confidence: 99%

“…Although their larvae were described earlier, only recently has it been possible to describe the life cycle and population dynamics of some species (King and Jaervis, 1970;Munilla, 1979Munilla, , 1980Tomaschko, et al, 1997;Wilhelm, et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

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Associations between pycnogonids and hydroids from the Buenos Aires littoral zone, with observations on the semi-parasitic life cycle of <i>Tanystylum orbiculare</i>(Ammotheiidae)

Genzano

2002

Sci. Mar.

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Section: Discussionsupporting

confidence: 91%

Section: Endo-parasitic Larvaementioning

confidence: 99%

See 1 more Smart Citation

Associations between pycnogonids and hydroids from the Buenos Aires littoral zone, with observations on the semi-parasitic life cycle of <i>Tanystylum orbiculare</i>(Ammotheiidae)

Genzano

2002

Sci. Mar.

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“…Finally, the larvae acquire the paired walking leg limb buds individually over a period of several molts (see below). This mode of postembryonic development (Typical Protonymphon) is shared by all species for which larvae are known in the genus Tanystylum, in the closely related genus Achelia, and in the more distantly related Pycnogonum (Morgan, 1891;Okuda, 1940;Behrens, 1984;Tomaschko et al, 1997;Wilhelm et al, 1997;Bain, 2003a).…”

Section: Discussionmentioning

confidence: 98%

Postembryonic development of Tanystylum bealensis (Pycnogonida, Ammotheidae) from Barkley Sound, British Columbia, Canada

Gillespie

Bain

2005

Journal of Morphology

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All developmental stages of Tanystylum bealensis are described. This is the first complete developmental series of a pycnogonid species collected from a natural, rather than a laboratory-reared population. Development proceeds through a series of nine instars from egg to adult, with major defining characteristics of the instars being the addition of walking legs, loss of chelifores, and modification of larval appendages into adult palps and ovigers. All stages are free-living on the hydroid Plumularia setacea, except for the first instar (protonymphon), which remains on the ovigers of the adult male for a short time after hatching. Development in T. bealensis is compared to development in both the closely related species T. orbiculare and to the more distantly related Achelia alaskensis.

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“…Culturing conditions were adopted from Behrens (1984), Tomaschko et al (1997), Vilpoux and Waloszek (2003), and Vilpoux (personal communication). The animals were kept in a mixture of natural and artiWcial seawater at a constant temperature of 15°C, pH values of 7.5-8 and a salinity of 30-32‰.…”

Section: Animalsmentioning

confidence: 99%

Cleavage and gastrulation in Pycnogonum litorale (Arthropoda, Pycnogonida): morphological support for the Ecdysozoa?

Ungerer

Scholtz

2009

Zoomorphology

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The early cleavage and gastrulation of the pycnogonid Pycnogonum litorale is investigated in detail by Xuorescence microscopy, confocal laser scanning microscopy, and histology. The cleavage is holoblastic with equally sized blastomeres and an irregular radial pattern. There is no stereotypic cell lineage, and timing and spindle directions of individual mitoses vary to a high degree. Gastrulation begins at the 63-cell stage with the retardation and enlargement of a cell which adopts the form of a bottle and Wlls the interior of the egg, followed by immigration and epiboly of smaller cells surrounding the large bottle-shaped cell. The gastrulation site marks the dorsal side of the embryo and the stomodaeum forms adjacent to the area of gastrulation. The pattern of the early development of Pycnogonum is compared with that of other Pycnogonida resulting in a putative ground pattern of pycnogonid development. Furthermore, our results are discussed in the wider framework of putative arthropod and cycloneuralian relationships. This comparison implies morphological support for the Ecdysozoa.

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Growth and reproduction of Pycnogonum litorale (Pycnogonida) under laboratory conditions

Cited by 42 publications

References 7 publications

Associations between pycnogonids and hydroids from the Buenos Aires littoral zone, with observations on the semi-parasitic life cycle of <i>Tanystylum orbiculare</i>(Ammotheiidae)

Associations between pycnogonids and hydroids from the Buenos Aires littoral zone, with observations on the semi-parasitic life cycle of <i>Tanystylum orbiculare</i>(Ammotheiidae)

Postembryonic development of Tanystylum bealensis (Pycnogonida, Ammotheidae) from Barkley Sound, British Columbia, Canada

Cleavage and gastrulation in Pycnogonum litorale (Arthropoda, Pycnogonida): morphological support for the Ecdysozoa?

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