Abstract
A new hydroid species, Cytaeis capitata n. sp. (family Cytaeididae), is described. This species, an epibiont of gastropod shells living in the shallow water of the Bunaken National Marine Park, North Sulawesi, Indonesia, is characterised by specialised polyps with an elongate tentacle, armoured by a capitation of peculiar nematocysts and lacking in the normal polyps. The medusae arise from gonophores enveloped in a layer of perisarc. Each has four oral tentacles, four radial canals, and four marginal tentacles. The diet of the polyps is related to the behaviour of gastropods: when the snails remain on the substratum, polyps are predators, whereas when the snails sink in the sediment, the polyps become sedimentivorous. The importance of the living mollusc for the hydroid is experimentally documentedthe polyps living on shell fragments decrease in number by 50–60% in a couple of days and completely disappear in 8 days.
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References
A. Agassiz A. G. Mayer (1899) ArticleTitleAcalephs from the Fiji Islands Bulletin of the Museum of Comparative Zoology at Harvard University 32 157–189
G. Bavestrello (1985) ArticleTitleIdroidi simbionti di paguri e gasteropodi nella riviera ligure di levante Oebalia 11 349–362
G. Bavestrello (1987) Description of the hydroid Perarella propagulata sp nov. (Cnidaria Hydrozoa) and discussion of relation within the superfamily Bougainvillioidea Petersen. In Bouillon, J., F. Boero, F. Cicogna & P. F. S. Cornelius (eds), Modern Trends in the Systematics Ecology and Evolution of Hydroids and Hydromedusae. Clarendon Press, Oxford: 19–27
G. Bavestrello S. Puce C. Cerrano A. Balduzzi (2000) ArticleTitleLife history of Perarella schneideri (Hydrozoa, Cytaeididae) in the Ligurian Sea Scientia Marina 64 141–146
J. Bouillon F. Boero (2000) ArticleTitlePhylogeny and classification of hydromedusae Thalassia Salentina 24 1–296
J. Bouillon F. Boero G. Seghers (1991) ArticleTitleNotes additionnelles sur les méduses de Papouasie Nouvelle-Guinée (Hydrozoa, Cnidaria) IV Cahiers de Biologie Marine 32 387–411
W. R. Brooks R. N. Mariscal (1985) ArticleTitleProtection of the hermit crab Pagurus pollicaris Say from predators by hydroid-colonized shells Journal of Experimental Marine Biology and Ecology 87 111–118 Occurrence Handle10.1016/0022-0981(85)90084-X
L. W. Buss C. S. McFadden D. R. Keene (1984) ArticleTitleBiology of hydractiniids hydroids 2. Histocompatibility effector system/competitive mechanism mediated by nematocyst discharge. Biological Bulletin 167 139–158
C. Cerrano G. Bavestrello S. Puce M. Sarà (1998) ArticleTitleBiological cycle of Podocoryne esigua (Cnidaria: Hydrozoa) from a sandy bottom of the Ligurian Sea Journal of the Marine Biological Association of the United Kingdom 78 1101–1111
H. E. Christensen (1967) ArticleTitleEcology of Hydractinia echinata (Fleming) (Hydroidea, Athecata) I. Feeding Biology. Ophelia 4 245–275
C. Edwards (1972) ArticleTitleHydroids and medusae of Podocoryne Journal of the Marine Biological Association of the United Kingdom 52 97–144
Eschscholtz, F., 1829. System der Acalephen, Berlin.
C. Gegenbaur (1856) ArticleTitleVersuch eines Systemes der Medusen, mit Beschreibung neuer oder wenig bekannter Formen; zugleich ein Beitrag zur Kenntnis der Fauna des Mittelmeeres Zeitschrift Wissenschaftliche Zoologie Leipzig 8 202–273
J. M. Gili R. G. Hughes (1995) ArticleTitleThe ecology of the marine hydroids Oceanography and Marine Biology an Annual Review 33 351–426
C. Herberts (1964) ArticleTitleNote sur la reproduction de l’hydraire Hydractinia aculeata (Wagner, 1833) Recueil des Travaux de la Station Marine d’Endoume 34 161–165
C. Herberts (1969) ArticleTitleNote au sujet du development de Nassa pigmaea Lamarck et Hydractinia aculeata (Wagner) Recueil des Travaux de la Station Marine d’Endoume 45 351–357
E. Hirai Y. Kakinuma (1970) ArticleTitleA preliminary report on the differentiation of the medusa bud of a hydrozoan Cytaeis uchidae Bulletin of the Marine Biological Station of Asamushi 14 7–10
E. Hirai Y. Kakinuma (1973) ArticleTitleDifferentiation and symbiosis in two hydrozoans Publications of the Seto Marine Biological Laboratory 20 257–273
Hirohito (1988) The Hydroids of Sagami Bay Biological Laboratory Imperial Household Tokyo
C. Inque Y. Kakinuma (1992) ArticleTitleSymbiosis between Cytaeis sp (Hydrozoa) and Niotha livescens (Gasteropoda) starts during their larval stage. Zoological Science 9 757–764
N. H. Millard (1959) ArticleTitleHydrozoa from the coasts of Natal and Portuguese East Africa Part II Gymnoblastea. Annals of the South African Museum 44 297–313
N. H. Millard (1975) ArticleTitleMonograph of the Hydroida of the Southern Africa Annals of the South African Museum 68 1–513
C. E. Mills (1976) The association of hydractiniids hydroids and hermit crabs with new observations from north Florida In Mackie G. O. (ed.), Coelenterate Ecology and Behaviour. Plenum Press, New York: 467–476
H. Namikawa S. F. Mawatari D. R. Calder (1992) ArticleTitleRole of the tentaculozooids of the polymorphic hydroid Stylactaria conchicola (Yamada) in interactions with some epifaunal space competitors Journal of Experimental Marine Biology and Ecology 162 65–75 Occurrence Handle10.1016/0022-0981(92)90125-T
K. W. Petersen (1979) Development of coloniality in Hydrozoa In Larwood G. & B. R. Rosen (eds), Biology and Systematics of Colonial Organisms. Academic Press, London and New York: 105–139
S. Puce G. Bavestrello A. Arillo F. Azzimi C. Cerrano (2002) ArticleTitleMorpho-functional adaptation to suspension feeding in Eudendrium (Cnidaria, Hydrozoa) Italian Journal of Zoology 69 301–304 Occurrence Handle10.1080/11250000209356473
J. W. Rees (1962) ArticleTitleHydroids of the family Cytaeidae L Agassiz, 1862. Bulletin of the British Museum (Natural History) Zoology 8 381–400
J. W. Rees (1967) ArticleTitleA brief survey of the symbiotic associations of Cnidaria with Mollusca Proceedings of the Malacological Society of London 37 213–231
C. Sheppard S. M. Wells (1988) Coral reefs of the world Vol. 2: Indian Ocean Red Sea and Gulf. UNEP, Nairobi & IUCN, Cambridge
A. R. D. Stebbing (1980) Increase of gonozooids frequency as an adaptative response to stress in Campanularia flexuosa In Tardent P. & R. Tardent (eds), Developmental Biology of Coelenterates. Elsevier/North Holland Biomedical Press, Amsterdam: 27–32
T. Uchida (1964) ArticleTitleA new hydroid species of Cytaeis, with some remarks on the interrelationships in the Filifera Publications␣of the Seto Marine Biological Laboratory 12 133–144
D. H. Van Winkle K. Longnecker N. W. Blackstone (2000) ArticleTitleThe effects of hermit crabs on hydractiniids hydroids Marine Ecology 21 55–67
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Puce, S., Arillo, A., Cerrano, C. et al. Description and ecology of Cytaeis capitata n. sp. (Hydrozoa, Cytaeididae) from Bunaken Marine Park (North Sulawesi, Indonesia). Hydrobiologia 530, 530–531 (2004). https://doi.org/10.1007/s10750-004-2687-z
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DOI: https://doi.org/10.1007/s10750-004-2687-z