Stolonization in Myrianida

Okada, Yô E.

doi:10.1017/s0025315400010079

Cited by 10 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, P. halleziana and S. amica also show an early appearance of the prostomium 4 and 5 days after amputation, respectively (Allen, 1923;Boilly, 1967a). Myrianida edwardsi Schizogamy − − 2 5 − 13 Okada, 1929;Saint-Joseph, 1886 Myrianida pinnigera Dehorne, 1917;Okada, 1935 Proceraea picta Allen, 1927aAllen, , 1927bOkada, 1929Okada, , 1934 Proceraea scapularis…”

Section: Syllid Regenerationmentioning

confidence: 99%

Regeneration mechanisms in Syllidae (Annelida)

2018

View full text Add to dashboard Cite

Syllidae is one of the most species‐rich groups within Annelida, with a wide variety of reproductive modes and different regenerative processes. Syllids have striking ability to regenerate their body anteriorly and posteriorly, which in many species is redeployed during sexual (schizogamy) and asexual (fission) reproduction. This review summarizes the available data on regeneration in syllids, covering descriptions of regenerative mechanisms in different species as well as regeneration in relation to reproductive modes. Our survey shows that posterior regeneration is widely distributed in syllids, whereas anterior regeneration is limited in most of the species, excepting those reproducing by fission. The latter reproductive mode is well known for a few species belonging to Autolytinae, Eusyllinae, and Syllinae. Patterns of fission areas have been studied in these animals. Deviations of the regular regeneration pattern or aberrant forms such as bifurcated animals or individuals with multiple heads have been reported for several species. Some of these aberrations show a deviation of the bilateral symmetry and antero‐posterior axis, which, interestingly, can also be observed in the regular branching body pattern of some species of syllids.

show abstract

Section: Syllid Regenerationmentioning

confidence: 99%

Regeneration mechanisms in Syllidae (Annelida)

2018

View full text Add to dashboard Cite

show abstract

“…Analysis of the complex proliferation of such chains has been attempted only by Malaquin (1893;summarized by Potts, 1911), Mensch (1900, and Okada (1935Okada ( , 1937. Analysis of the complex proliferation of such chains has been attempted only by Malaquin (1893;summarized by Potts, 1911), Mensch (1900, and Okada (1935Okada ( , 1937.…”

Section: Autolytusmentioning

confidence: 99%

Annelida: Polychaeta

Schroeder¹,

Hermans²

1975

Reproduction of Marine Invertebrates

207

162

View full text Add to dashboard Cite

“…). Paratomy, where a new individual is fully formed before fission occurs, has been described in polychaetes like Autolytus (Meyer ; Gidholm ), Myrianida (Okada ), Proceraea (Agassiz ; Franke), Salmacina (Vannini ), Trypanosyllis (Johnson ; Izuka ; Okada ), and Polydorella (Radashevsky ), as well as in oligochaetes like Naididae (Dehorne ; Bely ; Bely & Wray ; Zattara & Bely ) and in Aphanoneura (Herlant‐Meewis , ). One group where agametic reproduction is predominant is the Aeolosomatidae (Annelida, Aphanoneura), which includes 27 species (Glasby & Timm ).…”

mentioning

confidence: 99%

Quantitative observations on asexual reproduction of Aeolosoma viride (Annelida, Aphanoneura)

Falconi

Gugnali

Zaccanti

2015

Invertebrate Biology

View full text Add to dashboard Cite

Agametic reproductive activity (via paratomy) of Aeolosoma viride was analyzed throughout the life cycle in individually reared specimens. Aeolosoma viride is organized in linear chains of 3-4 zooids; the main zooid is anterior, and the secondary zooids are positioned posterior to the main zooid in inverse order with respect to their degree of growth, the most advanced being at the posterior end, and those less advanced nearer the main zooid. On average, worms lived 66AE10 d and produced 57AE6 offspring. A budding area located in the sub-terminal part of the main zooid produced chaetigers that formed the origin of the secondary zooids. A growth zone was located in the posterior end of each secondary zooids. Fission occurred between the penultimate and the last zooid of the chain. Just before fission, the growth zone of each secondary zooid became a budding area. Agametic reproduction was via multiple paratomy with linear succession of the secondary zooid and terminal fission. The structure of the chain was therefore modulated by the interaction of the processes of budding, growth, cephalic differentiation, and fission, which occurred continuously and on different timescales. Values of parameters describing paratomic activity (interval between origin of the zooids, time to produce a chaetiger, growth time of the zooids, and interval between the fission of the filial chains) are low early in an individual's life, but increase during senescence. Due to its relatively rapid lifecycle and high reproductive activity, A. viride is a convenient experimental organism for the study of agametic reproduction.

show abstract

Stolonization in Myrianida

Abstract: Myrianida pinnigera (Montagu) is one of the representative Syllids in the Plymouth district. Here, it is found always in close association with Ascidiella aspersa and Phallusia mammillata, possibly feeding upon the body fluid of these Ascidians.

Cited by 10 publications

References 0 publications

Regeneration mechanisms in Syllidae (Annelida)

Regeneration mechanisms in Syllidae (Annelida)

Annelida: Polychaeta

Quantitative observations on asexual reproduction of Aeolosoma viride (Annelida, Aphanoneura)

Contact Info

Product

Resources

About