Clytia gigantea ( Hincks, 1866 )

Gil, Marta & Ramil, Fran, 2021, Hydroids (Cnidaria, Hydrozoa) from the Vema and Valdivia seamounts (SE Atlantic), European Journal of Taxonomy 758, pp. 49-96 : 63-65

publication ID

https://doi.org/ 10.5852/ejt.2021.758.1425

publication LSID

lsid:zoobank.org:pub:7CA6D8AC-2312-47F9-8C17-528B94E4C8A7

DOI

https://doi.org/10.5281/zenodo.5093690

persistent identifier

https://treatment.plazi.org/id/EB6F5251-FFBC-FF8B-ED46-FB44311BFBB7

treatment provided by

Felipe

scientific name

Clytia gigantea ( Hincks, 1866 )
status

 

Clytia gigantea ( Hincks, 1866) View in CoL

Fig. 4A View Fig ; Table 6

Campanularia gigantea Hincks, 1866: 297 View in CoL .

Clytia gigantea View in CoL – Calder 2012: 46–47 View Cited Treatment , figs 46–47. — Peña Cantero & Horton 2017: 13 View Cited Treatment , fig. 5a–b.

Clytia sp. – Ramil 1988: 254–256, pl. XVII.

Material examined

SOUTH ATLANTIC OCEAN • 5 colonies, up to 13 mm high (2 growing on a ghost fishing net, 1 on Stegolaria geniculata ), no gonothecae; Valdivia Seamount , stn BT12; 24°49′01″–24°47′38″ S, 6°24′40″–6°25′26″ E; 887– 886 m depth; 7 Feb. 2015; SEAFO-2015 leg.; SEAFO-2015-40552 , SEAFO-2015-40582 , SEAFO-2015-40811 , SEAFO-2015-40852 , SEAFO-2015-40857 , LZM-UV slide R. 579 GoogleMaps .

Remarks

Despite the fact that this species is currently included in the synonymy of Clytia hemisphaerica (Linnaeus, 1767) ( Schuchert 2020) , we agree with Calder (2012) who considers C. gigantea as a valid species, due to the comparatively larger size of its hydrothecae, provided with linguiform cusps, an opinion that was also later shared by Peña Cantero & Horton (2017). Moreover, Ramil (1988), in his study of the hydroids of Galicia (NW Spain), described this species as Clytia sp. , apart from C. hemisphaerica , based on the same features highlighted by Calder (2012). Therefore, considering that both morphological features and measurements of our colonies coincide with those given by Ramil (1988), Calder (2012) and Peña Cantero & Horton (2017), we identify this material as C. gigantea .

The material studied here also resembles C. joycei Calder, 2019 in the hydrothecal shape; however, C. joycei is a shallow-water species, growing on the seagrass Thalassia testudinum K.D. Koening, 1805 and develops minute, stolonal colonies with comparatively smaller hydrothecae. These features typically separate C. joycei from C. gigantea ( Calder 2019) .

Distribution

This species has been recorded from the boreal waters of the Northeast Atlantic ( Calder 2012) to Galicia, NW Spain ( Ramil 1988, as Clytia sp. ) and also from Newfoundland to Cape Cod in the West Atlantic ( Calder 2012). Its presence outside the Atlantic Ocean, including the Mediterranean Sea, is considered as doubtful by Calder (2012). The records from Chile ( Leloup 1974; Galea et al. 2009) are based on misidentifications ( Galea & Schories 2012). Its bathymetric distribution extends from 20 ( Calder 2012) to 950 m ( Peña Cantero & Horton 2017). Clytia gigantea is reported here for the first time from the South Atlantic, at Valdivia Seamount.

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

SubClass

Hydroidolina

Order

Leptothecata

Family

Campanulariidae

Genus

Clytia

Loc

Clytia gigantea ( Hincks, 1866 )

Gil, Marta & Ramil, Fran 2021
2021
Loc

Clytia sp.

Ramil F. 1988: 254
1988
Loc

Campanularia gigantea

Hincks T. 1866: 297
1866
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