Eugymnanthea inquilina Palombi, 1935

Gravili, Cinzia, Vito, Doris De, Camillo, Cristina Gioia Di, Martell, Luis, Piraino, Stefano & Boero, Ferdinando, 2015, The non-Siphonophoran Hydrozoa (Cnidaria) of Salento, Italy with notes on their life-cycles: an illustrated guide, Zootaxa 3908 (1), pp. 1-187 : 86-87

publication ID

https://doi.org/ 10.11646/zootaxa.3908.1.1

publication LSID

lsid:zoobank.org:pub:D6AD2B49-170B-4D9C-84AA-DBE0FEEAD8BE

DOI

https://doi.org/10.5281/zenodo.6107081

persistent identifier

https://treatment.plazi.org/id/03F887DE-FFA3-FFEF-9CD6-0D49D431FE06

treatment provided by

Plazi (2016-04-17 23:40:15, last updated 2024-11-25 23:10:55)

scientific name

Eugymnanthea inquilina Palombi, 1935
status

 

Eugymnanthea inquilina Palombi, 1935 View in CoL

Fig. 59 View FIGURE 59 A, B

See Kramp (1961) for a complete synonymy.

Material examined. HCUS-S 0 66 (Hydrozoa Collection, University of Salento—fauna of the Salento Peninsula)—polyp stage.

Description (based on our own observations; Palombi 1935; Kramp 1959; Kubota 1979, 1983):

Hydroid. Epizootic on gills of bivalves, solitary or forming small colonies; hydranth tubular, without hydrothecae, with a conical hypostome; with a single whorl of 20–24 filiform tentacles; with an intertentacular membranous web, fixed to the host by a basal disc; often young hydranths budding from the middle part of the primary hydranth body; 1–2 medusa buds at the basal part of the hydranths. Colour: hydroid yellow-orange.

Habitat type and substrate. Hydroid living in bivalve Mollusca such as Ruditapes decussatus , Mytilus galloprovincialis and others ( Palombi 1935; Cerruti 1941 as Mytilhydra polimantii ; Morri 1981a, b; Gili, 1986; Brinckmann-Voss 1987; Piraino et al. 1994).

Seasonality. From April to November ( Palombi 1935; Piraino et al. 1994) in theTyrrhenian and Ionian Seas.

Reproductive period. April–November ( Palombi 1935; Piraino et al. 1994).

Medusa. Umbrella sphero-conical up to 0.55 mm high and wide, without manubrium and tentacles; 4 simple radial canals; 4 large, sac-like gonads on radial canals, not lobular, 8 adradial statocysts with 3 or 4 statoliths.

Cnidome. Basitrichous isorhizas.

Distribution. Endemic to Mediterranean Sea ( Medel & López-González 1996; Bouillon et al. 2004; Gravili et al. 2008a).

Records in Salento. Common in the Ionian Sea ( Piraino et al. 1994; Kubota 2000) and Adriatic Sea, Apulian coasts ( Kubota 2000).

Remarks. The whole life cycle was examined in the present study. For more details about the systematics and ecology of this species see Kubota (1983, 1989, 2000), Piraino et al. (1994), Govindarajan et al. (2005).

References. Kramp (1961), Kubota (1979, 1983, 1985, 1987, 2000), Gili (1986), Gili et al. (1988), Piraino et al. (1994), Bouillon et al. (2004), Gravili et al. (2008a).

Piraino, S., Todaro, C., Geraci, S. & Boero, F. (1994) Ecology of the bivalve-inhabiting hydroid Eugymnanthea inquilina in the coastal sounds of Taranto (Ionian Sea, SE Italy). Marine Biology, Berlin, 118 (4), 695 - 703. http: // dx. doi. org / 10.1007 / bf 00347518

Govindarajan, A. F., Piraino, S., Gravili, C. & Kubota, S. (2005) Species identification of bivalve-inhabiting marine hydrozoans of the genus Eugymnanthea. Invertebrate Biology, 124 (1), 1 - 10. http: // dx. doi. org / 10.1111 / j. 1744 - 7410.2005.1241 - 01. x

Gravili, C., Boero, F. & Licandro, P. (2008 a) Hydrozoa. Biologia Marina Mediterranea, 15 (Supplement), 71 - 91.

Brinckmann-Voss, A. (1987) Seasonal distribution of hydromedusae (Cnidaria, Hydrozoa) from the Gulf of Naples and vicinity, with observations on sexual and asexual reproduction in some species. In: Bouillon, J., Boero, F., Cicogna, F. & Cornelius, P. F. S. (Eds.), Modern trends in the Systematics, Ecology and Evolution of Hydroids and Hydromedusae. Clarendon Press, Oxford, pp. 133 - 141.

Cerruti, A. (1941) Mytilhydra polimantii n. gen., n. sp., idroide vivente sul mantello dei mitili. Rivista di biologia, 32, 1 - 18.

Kramp, P. L. (1959) The Hydromedusae of the Atlantic Ocean and adjacent waters. Dana-Report, 46, 1 - 283.

Kramp, P. L. (1961) Synopsis of the medusae of the world. Journal of the Marine Biological Association of the United Kingdom, 40, 1 - 469. http: // dx. doi. org / 10.1017 / s 0025315400007347

Kubota, S. (1979) Occurrence of a commensal hydroid Eugymnanthea inquilina Palombi from Japan. Journal of the Faculty of Science, Hokkaido University, Series VI, 21 (4), 396 - 406.

Kubota, S. (1983) Studies on the life history and systematics of the Japanese commensal hydroids living in bivalves, with some reference to their evolution. Journal of the Faculty of Science, Hokkaido University, Series VI, 23 (3), 296 - 402.

Kubota, S. (1989) Systematic study of a paedomorphic derivative hydrozoan Eugymnanthea (Thecata-Leptomedusae). Zoological Science, 6 (1), 147 - 154.

Kubota, S. (2000) Parallel, paedomorphic evolutionary processes of the bivalve-inhabiting hydrozoans (Leptomedusae, Eirenidae) deduced from the morphology, life cycle and biogeography, with special reference to taxonomic treatment of Eugymnanthea. In: Mills, C. E., Boero, F., Migotto, A. & Gili, J. M. (Eds.), Trends in Hydrozoan Biology - IV. Scientia Marina, 64 (Supplement 1), pp. 241 - 247. http: // dx. doi. org / 10.3989 / scimar. 2000.64 s 1241

Medel, M. D. & Lopez-Gonzalez, P. J. (1996) Updated catalogue of the Hydrozoans from the Iberian Peninsula and Balearic Islands with remarks on zoogeography and affinities. Scientia Marina, 60 (1), 183 - 209.

Morri, C. (1981 a) Les Hydraires de quelques milieux lagunaires italien (Italie continentale et Sardaigne). Rapports et Proces Verbaux des Reunions, Commission Internationale pour l'Exploration Scientifique de la Mer Mediterranee, 27 (4), 193 - 194.

Morri, C. (1981 b) Idrozoi lagunari. Guide per il riconoscimento delle specie animali delle acque lagunari e costiere italiane. Consiglio Nazionale delle Ricerche, Roma, AQ / 1 / 94, 6, 1 - 105. http: // dx. doi. org / 10.1002 / iroh. 19810660144

Palombi, A. (1935) Eugymnanthea inquilina nuova Leptomedusa derivante da un atecato idroide ospite interno di Tapes decussatus L. Pubblicazione della Stazione zoologica di Napoli, 15 (2), 159 - 168.

Gallery Image

FIGURE 59. Eugymnanthea inquilina: A, hydranth with gonophore; B, eumedusoid (A and B same scale) (redrawn and modified after Morri 1981 by A. Gennari). Scale bar: A, B, 0.5 mm.

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Eirenidae

Genus

Eugymnanthea