Abstract
In 1953 the author described a regression and replacement cycle of hydranths in Laomedea flexuosa and proposed that this is a common feature of thecate hydroids. Here examples are presented of replacement of hydranths in species from 5 families of thecates, but it has not been demonstrated that this is as common as had been thought. More continuous studies are needed. A brief consideration is given to the origin of hydrothecae and their development.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Agassiz, L., 1862. Contributions to the Natural History of the United States of America, 4. Little, Brown & Co., Boston, 380 pp.
Allman, G. J., 1877. Report on the Hydroida collected during the exploration of the Gulf Stream by L. F. de Pourtalès, Assistant United States Survey. Mem. Mus. comp. Zool. Harvard College 5(2): 1–66.
Berrill, N. J., 1949. Growth and form in calyptoblastic hydroids. I. Comparison of a campanulid, campanularian, sertularian and plumularian. J. Morph. 85: 297–335.
Boero, F. & J. Bouillon, 1987. Inconsistent evolution and paedomorphosis among the hydroids and medusae of the Athecatae/Anthomedusae and the Thecatae/Leptomedusae (Cnidaria, Hydrozoa). In J. Bouillon, F. Boero, F. Cicogna & P. F. S. Cornelius (eds), Modern Trends in the Systematics, Ecology, and Evolution of Hydroids and Hydromedusae. Oxford Univ. Press, Oxford: 229–250.
Cornelius, P. F. S., 1975. A revision of the species of Lafoeidae and Haleciidae (Coelenterata: Hydroida) recorded from Britain and nearby seas. Bull. Br. Mus. nat. Hist. (Zool.) 28: 373–426.
Cornelius, P. F. S., 1979. A revision of the species of Sertulariidae (Coelenterata: Hydroida) recorded from Britain and nearby seas. Bull. Br. Mus. nat. Hist. (Zool.) 34: 243–321.
Crowell, S., 1953. The regression-replacement cycle of hydranths of Obelia and Campanularia. Physiol. Zool. 26: 319–327.
Crowell, S., 1960. Hydroida. In Encyclopedia of Science and Technology, 6. McGraw Hill, N.Y.: 554.
Elmhirst, R., 1922. Cyclic conditions and rejuvenation in hydroids. Nature, Lond. 109: 208–209.
Fraser, CM., 1921. Key to the hydroids of eastern Canada. Contrs can. Biol. (1918–1920): 137–180.
Fraser, C. M., 1944. Hydroids of the Atlantic coast of North America. Univ. of Toronto Press, Toronto, 453 pp.
Hancock, D. A., R. E. Drinnan & W. N. Harris, 1956. Notes on the biology Sertularia argentea L. J. mar. biol. Ass. U.K. 35: 307–325.
Hughes, R. G., 1986. Differences in the growth, form and life history of Plumularia setacea (Ellis and Solander) (Hydrozoa: Plumulariidae) in two contrasting habitats. Proc. r. Soc., Lond. (Ser. B) 228: 113–125.
Hughes, R. G., 1987. The loss of hydranths of Laomedea flexuosa Alder and other hydroids, with reference to hydroid senescence. In J. Bouillon, F. Boero, F. Cicogna & P. F. S. Cornelius (eds), Modern Trends in the Sys- tematics, Ecology, and Evolution of Hydroids and Hydro- medusae. Oxford Univ. Press, Oxford: 171–184.
Knight, D. P., 1965. Behavioural aspects of emergence in the hydranth of Campanularia flexuosa (Hincks). Nature, Lond. 206: 1170–1171.
Naumov, D. V., 1960. Gidroidy i gidromeduzy morskikh, solonovatovodnykh i presnovodnykh basseinov S.S.S.R. Fauna S.S.S.R. 70: 1–626.
Nutting, C. C, 1901. The hydroids of the Woods Hole region. Bull. U.S. Fish Commn for 1899: 325–386.
Vervoort, W., 1987. Evaluation of taxonomic characters in the Hydroida, particularly in the Thecata (= Lepto-medusae). In J. Bouillon, F. Boero, F. Cicogna & P. F. S. Cornelius (eds), Modern Trends in the Systematics, Ecology, and Evolution of Hydroids and Hydromedusae. Oxford Univ. Press, Oxford: 83–103.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1991 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Crowell, S. (1991). Regression and replacement of hydranths in thecate hydroids, and the structure of hydrothecae. In: Williams, R.B., Cornelius, P.F.S., Hughes, R.G., Robson, E.A. (eds) Coelenterate Biology: Recent Research on Cnidaria and Ctenophora. Developments in Hydrobiology, vol 66. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3240-4_10
Download citation
DOI: https://doi.org/10.1007/978-94-011-3240-4_10
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5428-7
Online ISBN: 978-94-011-3240-4
eBook Packages: Springer Book Archive